• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Thus proposed and described is a method for determining at least one derived property of a medium (5), wherein a medium (5) having a first temperature (61) is introduced into a measuring volume, wherein nuclear magnetic measurements are performed on the medium (5) with the first temperature (61) in the in the measuring volume, wherein from the nuclear magnetic measurements at least one property of the medium (5) at the first temperature (61) is determined from the group {spin— lattice relaxation time constant (T1(6fl), spin—spin—relaxation time constant (T2(61)) and diffusion time constant (D(61)). The invention is based on the object of providing a method that requires less time compared to known methods. is achieved by a method in which the at least one property determines a viscosity (n(81)) of the medium (5) at the first temperature (81), and in which at least one derived property of the medium (5) at a second 20 temp erature (62) is determined from the group {spin-lattice relaxation time constant (T1(62)), spin-spin relaxation time constant (T2(62)) and diffusion time constant (D(62))} using the at least one property of the medium (5) at the first temperature (81), the viscosity (n(81)) of the medium (5) at the first temperature (81), the first temperature (81) and the second temperature (62).
    公开号:NL2026489A
    申请号:NL2026489
    申请日:2020-09-17
    公开日:2021-05-17
    发明作者:Reinout Tromp Rutger
    申请人:Krohne Ag；
    IPC主号:
    专利说明:

    Method for determining a derived property of a medium and a nuclear magnetic measurement device, computer program product and computer readable storage medium for such medium
    The invention relates to a method for determining at least one derived property of a medium.
    In this case, a medium with a first temperature <1 is introduced into a measurement volume, nuclear magnetic measurements are performed on the medium with the first temperature in the measurement volume, and at least one property of the medium at the first temperature from the group {spinning lattice relaxation time constant T:{($:), spin-spin relaxation time constant T2 (91) and diffusion time constant D(f:)} determined from the nuclear magnetic measurements.
    The invention further relates to a nuclear magnetic flow meter comprising a measuring tube, a measuring instrument and a computer, wherein the measuring tube has a measuring volume, and the measuring instrument is adapted for nuclear magnetic measurements and the computer is adapted to perform such a method.
    In addition, the invention also relates to a computer program product and a computer-readable storage medium.
    The invention relates to the field of nuclear magnetic measuring methods and nuclear magnetic flowmeters, wherein nuclear magnetic flowmeters are arranged to perform nuclear magnetic measurements according to nuclear magnetic measuring methods.
    A nuclear magnetic measuring device is thus adapted to perform nuclear magnetic measurements on a medium in the measuring volume of the measuring tube during use with the measuring instrument and to determine properties of the medium and information about the medium from the nuclear magnetic measurements with the computer.
    When performing nuclear magnetic measurements by the measuring device, a precession
    40 of atomic nuclei of the medium affected, in the presence of
    - 2 = a macroscopic magnetic field that has pre-magnetizes the medium by exciting the atomic nuclei to nuclear magnetic resonances and the nuclear magnetic resonances are measured.
    The computer controls the measuring instrument.
    For this reason, nuclear magnetic measurements are often also called nuclear magnetic resonance measurements or magnetic resonance measurements, and corresponding measuring equipment as nuclear magnetic resonance measuring equipment or magnetic resonance measuring equipment.
    The meter has a magnetic field generating device for generating the macroscopic magnetic field.
    The medium often also has several phases.
    It is then a multi-phase medium.
    In order to determine properties of and/or information about the individual phases of the multiphase medium, atomic nuclei of the individual phases must be able to be excited into distinguishable nuclear magnetic resonances.
    For example, nuclear magnetic resonances can be distinguished from each other when spin-lattice relaxations of the individual phases have different spin-lattice relaxation time constants Ti: .
    The spin lattice relaxation time constant is a property of a phase.
    Further properties are a spin-spin relaxation time constant T: and a diffusion time constant D.
    Information about phases of the medium can be determined with the aid of at least one of the properties mentioned.
    Information is, for example, the flow rates of individual phases of the medium through the measuring tube.
    Where the multiphase medium is recovered from oil wells, it essentially contains crude oil and (salt) water as liquid phases and as gas phase phase and natural gas, the atomic nuclei of all phases have hydrogen nuclei, the crude oil and (salt) water phases are usually distinguished by different spin lattice relaxation time constants Ti, and nuclear magnetic flowmeters are particularly suitable for determining
    - 3 = properties and information of media extracted from oil wells. As already indicated above, a medium with a first temperature 9: is introduced into a measuring volume. For example, the measuring volume is formed by a measuring tube and the medium is introduced into the measuring volume by flowing through the measuring tube. The medium has the first temperature. It consists of one or more phases. The phases are either liquid or gaseous. Nuclear magnetic measurements are performed on the medium that has the first temperature and is in the measurement volume. On the basis of the measurements, at least one property of the medium at the first temperature is determined. The at least one property is a property of the group {spin lattice relaxation time constant Ti{d1), spin spin relaxation time constant T2(8:1) and diffusion time constant D(ò:1)}. Next, a spin-lattice relaxation time constant T:{(91i) and/or a spin-spin relaxation time constant T:{%) and/or a diffusion time constant D (9:1) is determined. If the medium is a multiphase medium, then at least one property of at least one phase of the medium is determined. The above mentioned group of properties of a medium depends on the temperature ¢ of the medium. As a result, the values of the properties at a second temperature differ 9:2 from those at the first temperature Ji, the second temperature being different from the first temperature. It is known in the art to determine the properties of the medium at the second temperature by repeating the measurements described above and the described determination of the properties from the measurements on the medium at the second temperature. However, this procedure is time consuming.
    It is therefore an object of the invention to specify a method which requires less time compared to the known method. The aim is achieved by a method with the features of 40 patent claim 1. More specifically, it is first from the ten
    - 4 - at least one property determined previously determined a viscosity n (1) of the medium at the first temperature (3). Then at least one derived property of the medium at a second temperature (9:2) is determined from the group {spin lattice relaxation time constant T:{(Ó2), spin spin relaxation time constant T: (82) and diffusion time constant D( 82)} using the at least one property of the medium at the first temperature, the predetermined viscosity n(ò1) of the medium at the first temperature, the first temperature (91) and the second temperature (9:). Preferably, the at least one derived property of the medium is also shown.
    The at least one property from which the viscosity of the medium at the first temperature is determined is a previously determined property of the medium at the first temperature from the group {spin lattice relaxation time constant Ti: (Sh), spin spin relaxation time constant Tz: (91) and diffusion time constant D{(&1)}. By determining a property of the medium at the second temperature from the group {spin-lattice relaxation time constant T:{9:2), spin-spin relaxation time constant T, (92) and diffusion time constant D(&2)} using the ten least one property of the medium at the first temperature, this property of the medium at the second temperature becomes a derived property. The property of the medium at the second temperature is preferably determined from the property of the medium at the first temperature. For example, the spin-lattice relaxation time constant of the medium at the second temperature is determined using the spin-lattice relaxation time constant of the medium at the first temperature.
    Compared to the prior art, this method requires less time. A time-consuming execution of measurements from which the properties of the medium at the second temperature of the medium as well as at the first temperature of the medium are determined again is no longer necessary, which results in a shorter period of time. Instead
    _ 5 — the properties of the medium at the second temperature are derived from those at the first temperature. The viscosity of the medium n (3:1) at the first temperature can be determined according to different embodiments of the method according to the invention. In a first embodiment of the determination of the viscosity of the medium n() at the first temperature, the spin lattice relaxation time constant Ti{31) of the medium at the first temperature is determined as the at least one property. In addition, further properties of the medium are preferably determined at the first temperature. Subsequently, a logarithmic mean or a weighted mean of the spin-lattice relaxation time constants T:1,m{(d1) is determined. Further, the viscosity n{({9:1) of the medium at the first temperature is derived from the logarithmic mean or weighted mean of the spin-lattice relaxation time constants using the first formula 1.0(8) =k(n( %)) "+k (2(9))™ determined. The formula has four parameters, namely ki, kz, ks and K4, where the values of the parameters are real numbers. The parameters are assigned values within the ranges 0 .37831 S ki £ 3.3887, 0.45419 S ka £ 1.2055, 0.88616:107%3 £ ka S 26.547: 107%3 and -0.023116 £ ka £ 0.34519 allocated.
    The determination of the viscosity n ($1) is more accurate if the parameters range values from the narrower range 0.75655 < ki < 2.2618, 0.63180 S ksa £ 1.0075, 1.7727: 107%3 £ k3 S 14.603 10% and
    0.10966 S ks = 0.29381 are allocated.
    The determination of the viscosity n (91) is even more accurate if the parameters are assigned the values ky = 1.1348, k: = 0.80842, k3 = 2.6592:107%3 and kaa = 0.24243.
    In a second embodiment of the determination of viscosity n (Hh), first the spin-spin relaxation time constant T-:{%31) of the medium at the first temperature is determined as the at least one property. In addition, further properties of the medium are preferably determined at the first temperature. Subsequently, a logarithmic mean or a weighted mean of the spin-spin relaxation time constants T2.1m{9:1) is determined.
    Furthermore, the viscosity n(91) of the medium at the first temperature is determined from the logarithmic mean or the weighted mean of the spin-spin relaxation time constants using the second formula Tar(3) ~ ks(n(2))" The formula has two parameters namely ks and ke where the values of these parameters are real numbers The parameters are assigned values within the ranges 0.37831 S ks £ 3.3887 and 0.45419 £ ke S 1.2055 .
    The determination of the viscosity n (di) is more accurate if the parameters are assigned values from the narrower ranges 0.75655 < ks S 2.2618 and 0.63180 S ke £ 1.0075.
    The determination of the viscosity n{Â:1) is even more accurate if the parameters are assigned the values ks = 1.1348 and ks = 0.80942.
    In a third embodiment of the viscosity determination n(91), first the diffusion time constant D(Ó1) of the medium at the first temperature is determined as the at least one property. In addition, further properties of the medium are preferably determined at the first temperature. Then the viscosity is calculated from the diffusion time constant D{(&:1}) using the third formula D(8)~k, (1(3))"
    - 7 = determined. The formula has two parameters, namely k7 and ks, where the values of the parameters are real numbers. The values assigned to the parameters depend on the value of the diffusion time constant D(%1).
    If the diffusion time constant D{%1) of the medium at the first temperature is less than or equal to 3 10+! m/s, the following applies: Values within the ranges 0.2445:1073 £< ky S 2.2005-10"% and 0.375 S ke £ 0.650 are assigned to the parameters. Determination of viscosity n (9) is more accurate if the parameters are assigned values within the narrower ranges 0.48900-10°% < ky £ 1.4670:10°° and 0.43750 £ ks < 0.57500. The determination of the viscosity n{Â: 1) is even more accurate if the parameters are assigned the values ky = 0.7335:10°% and ks = 0.500. If the diffusion time constant D{%1) of the medium at the first temperature is greater than 3 10%!m /s, then the following applies: The parameters are assigned values within the ranges 0.05777 10-9 £ k7 S 0.5199 10-9 and 0.125 < k8 < 0.375 The determination of the viscosity n(d:) is more accurate when the parameters are assigned values within the narrower ranges 0.11554:10% < ky £ 0.34660 107% and 0.18750 £ ks S 0.31250. The determination of the viscosity n (31) is even more accurate when the parameters the values k73 = 0.1733-10°° and ke = 0.25 are assigned. In a further embodiment of the method according to the invention, at least one relaxation time constant Ti (32), 1 = {1,2} of the medium at the second temperature from the group 40 {spin-lattice relaxation time constant Ti{(0:2) and spin-spin
    _ 3 _ relaxation time constant Tz (92) } using a temperature coefficient dT:/dò of a relaxation time constant Ti from the group {spin-lattice relaxation time constant T1 and spin-spin relaxation time constant T:2} as the at least one derived property determined. For example, the temperature coefficient is given. The at least one relaxation time constant T:{(Ó2), i = {1,2} of the medium at the second temperature is preferably determined with the aid of the temperature coefficient dT:/dô of these relaxation time constants. The spin-lattice relaxation time constant T:{(Â:2)}) of the medium at the second temperature is determined, for example, with the aid of the temperature coefficient dT>2/dô of the spin-lattice relaxation time constant. In a further elaboration of the aforementioned embodiment, the at least one relaxation time constant Ti (dz), 1 = {1,2} of the medium at the second temperature is determined by the fourth formula I(8)=T(4)e™ determined.
    In an alternative to the preceding elaboration, the at least one relaxation time constant Ti(82), 1 = {1,2} becomes using the Taylor polynomial according to the fifth formula T(8)=T(3) 1+7( %-9)+.] determined. The Taylor polynomial is a Taylor polynomial of the fourth formula. The Taylor polynomial is preferably a second or third degree polynomial.
    In a further alternative, the at least one relaxation time constant is determined using the approximation formula of the sixth formula 1(9,)=T(8)+(8-8)
    _ 9 — determined.
    The approximation formula is an approximation of the fourth formula.
    In the above formulas, according to the seventh formula, Ld VERT yes T(3) 49 If a temperature coefficient dT:/d9, Ti = {1,2} is used in accordance with the above, then in a further embodiment it is provided that the temperature coefficient daTi/d$3 using the eighth formula dar: . Zh ee keje dg is determined.
    The formula has two parameters, namely ks and kip, where the values of the parameters are real numbers.
    Values assigned to the parameters are within the ranges 0.013036 S ks S 0.11732 and 1.2604:1073 < kio S 5.0416:1073. The determination of the viscosity n(d:) is more accurate when the parameters are assigned values within the narrower ranges 0.026072 < ka 0.078213 and 1.8906 : 107% S kig 3.7812 107%.
    The determination of the viscosity n{d:) is even more accurate if the parameters are assigned the values ks = 0.039107 and kip = 2.5208 10-3.
    In a further elaboration of the aforementioned embodiment, it is ensured that the viscosity n(01) of the medium at the first temperature is used.
    If, according to the above, the spin-lattice relaxation time constant Ti{(d:) is determined at the second temperature of the medium, a further elaboration of the method ensures that a logarithmic mean or a weighted average of the spin-lattice relaxation time constant Ti,1( Â:2) is determined.
    It is further ensured that the viscosity n(:)} of the medium at the second temperature is determined based on the 40 logarithmic mean or weighted mean of the spin lattice relaxation time constants Ti,1{2) using the
    — 10 = first formula. The parameters in the first formula are assigned values within the ranges listed. The implementation of the values also applies here. If, as described above, the spin-spin relaxation time constant T:{9:2) is determined at the second temperature of the medium, then further elaboration of the method ensures that a logarithmic mean or a weighted average of the spin spin relaxation time constant To, wi (92) is determined. It is further ensured that the viscosity n (92) of the medium at the second temperature is determined based on the logarithmic mean or weighted average of the spin-spin relaxation time constants Tz, (82) using the second formula. The parameters in the second formula are assigned values within the ranges listed. The implementation of the values also applies here.
    For example, if the viscosity n(32) of the medium at the second temperature is determined according to one of the two embodiments above, a further elaboration is provided, wherein the diffusion time constant D{8:2)}) of the medium at the second temperature is is determined from the viscosity n (9:2) of the medium at the second temperature using the third formula. The parameters in the third formula are assigned values within the stated ranges. The implementation of the values also applies here.
    In a further embodiment, the scope of functions is added to the method. The medium with the second temperature 9; flows through the measurement volume. The medium no longer has the first temperature di, but the second temperature 92. In the nuclear magnetic flow meter, it flows through the measuring volume in the measuring tube. Nuclear magnetic measurements are then performed on the medium with the second temperature in the measurement volume.
    Subsequently, a flow rate of the medium with the second temperature through the measuring volume is determined using the nuclear magnetic measurements on the medium with the second
    - 11 -
    temperature, the spin-lattice relaxation time constant Ti($2) and/or the spin-spin relaxation time constant T2{(92) of the medium at the second temperature.
    The flow rate is an information about the medium.
    The spin-lattice relaxation time constant Tz {Â:) and the spin-spin relaxation time constant Tz (92) are determined according to the aforementioned embodiments as derived properties of the medium.
    Although the medium now has the first temperature & different second temperature òd:2 and the values of the properties of the medium, to which in particular the viscosity n, the spin-lattice relaxation time constant T1, the spin-spin relaxation time constant T2 and the density p, due to the temperature change A3 = $2 - 01 have changed, the determination of the flow rate is possible because the properties of the medium at the second temperature (n{S>}), Ti (52), T2{ 8:2), p{d:)) from the properties of the medium at the first temperature (n{(81), Ti(S3), T2(Hh), p(9:)) can be derived.
    A time-consuming performance of measurements from which the properties of the medium at the second temperature of the medium as well as at the first temperature of the medium are determined again is no longer necessary, so that the result takes less time.
    In a further elaboration of the aforementioned embodiment, it is ensured that the flow rate of the medium at the second temperature Jd: is converted to a flow rate of the medium at the first temperature 1 or a further temperature ds.
    In various applications it is a requirement to indicate the flow rate normalized to certain properties of the medium.
    For example, it is required to specify the flow rate of the medium, normalized to the first temperature 91 or the further temperature 3, although the flow rate is measured at temperature Â:2. This normalization makes it possible to compare flow rates measured at different temperatures.
    In a further elaboration of the above elaboration, the density p and/or the viscosity n of the medium is or are used for this conversion. For example, the conversion is carried out according to the black oil standard API 2540 from 1984.
    The aforementioned embodiments and developments describe determining the viscosity of the medium at the first temperature and determining the at least one derived property of the medium at the second temperature. In a further embodiment of the method, the functional scope of the method is supplemented in that a density p of the medium is determined from the viscosity n of the medium. In a further elaboration, care has been taken that the density is determined on the basis of the viscosity with the aid of the formula prk, fe nr. Accordingly, the density, which is also a property of the medium, is derived from another variable, namely the viscosity, thus eliminating the need for a separate density measurement with a measuring device designed for this purpose. The cost for this measuring device will be eliminated accordingly. The formula has three parameters, namely k1, kiz and kis, where the values of the parameters are real numbers. Values are assigned to the parameters within the ranges 941.82 S kip S 1025.8, 180.65 S ki S 264.61 and 0.15921 < kia < 0.37899. The determination of the density p is more accurate when the parameters are assigned values within the narrower ranges 962.81 < ku; £ 1004.8, 201.64 =< k12 S 243.62 and 0.21415 < kiz S 0.32405.
    - 13 = The determination of the density is even more accurate if the parameters are assigned the values ki: = 983.80, ki» = 222.63 and kiz = 0.26910.
    As already described, the invention also relates to a nuclear magnetic flow meter.
    Said object is also achieved by a nuclear magnetic flowmeter having the features of patent claim 17. In this case, the computer is designed to perform the described method.
    The nuclear magnetic flow meter preferably also has a display designed to display the at least one inferred property of the medium.
    The object is also achieved by a computer program product having the features of patent claim 18, which includes commands which, when the program is executed by a computer, cause the computer to perform the described method.
    The object is also achieved by a computer-readable storage medium having the features of patent claim 19, comprising instructions which, when the program is executed by a computer, cause the computer to perform the described method.
    A variety of individual options are provided for designing and developing the method, the nuclear magnetic flow meter, the computer program product and the computer readable storage medium.
    To this end, reference is made both to the claims subordinate to the independent claims and to the following description of a preferred exemplary embodiment in conjunction with the drawing.
    In the drawings, Figs. 1 shows a first embodiment of a nuclear magnetic flow meter and
    - 14 - Figs. 2 shows a flow chart of an exemplary embodiment of a method for determining a derived property of a medium. fig. 1 shows an exemplary embodiment of a nuclear magnetic flow meter 1. It has a measuring tube 2 with a measuring volume, a measuring instrument 3 and a computer 4. The measuring instrument 3 is intended to perform nuclear magnetic measurements. During use of the nuclear magnetic flow meter 1, a medium 5 flows through the measuring tube 2 and the computer 4 performs the method described below, wherein the computer 4 also controls the measuring instrument 3 and the measuring instrument carries out nuclear magnetic measurements on the medium 5 in the measuring volume. The method is in the form of a program stored on a storage medium that can be read by the computer 4 and is read into the computer 4 by the computer 4 when it is run and contains commands that cause the computer 4 to execute the method. performs. In a first method step 6, the medium 5 has a first temperature of 9:1 and is introduced into the measuring volume in that it flows through the measuring tube. In a second method step 7, nuclear magnetic measurements are performed on the medium 5 in the measuring volume. The medium 5 has the first temperature Ó1 during the measurements.
    In a third method step 8, a spin lattice relaxation time constant Ti (51) is determined from the nuclear magnetic measurements as a property of the medium at the first temperature Ji. In a fourth method step 9, a viscosity n {%1) of the medium 5 at the first temperature & is determined from the spin-lattice relaxation time constant Ti (391).
    The viscosity n (8:1) is determined by first determining a logarithmic mean of the spin lattice relaxation time constants T i , wm (81). Then the viscosity nd) is derived from the logarithmic mean of the spin lattice relaxation time constants Ti, w($) using the first formula ha ~k, (3) xk, (7(3)) +k (7(3)) determined. Here holds ki = 1.1348, k: = 0.80942, ka = 2.6592 - 1073 and ka = 0.24243.
    In a fifth method step 10, the spin-lattice relaxation time constant Ti{(d:}) of the medium 5 at a second temperature 92 is determined as a property derived using the spin-lattice relaxation time constant T;i{ô1) of the medium at the first temperature 1, the viscosity n{({ÂÂ:1) of the medium at the first temperature Â:, the first temperature 1 and the second temperature d: are determined.
    The determination of the spin lattice relaxation time constant Ti (92) at the second temperature 9: is performed using the approximation formula dT T(3)27(4)+ (3,3) d3 In the approximation formula, a temperature coefficient dT:/d3 of the spin lattice relaxation time constant Ti. The temperature coefficient is determined using the formula dT ' Ln cow Me d3. Here ke = 0.039107 and kip = 2.5208 1073. The viscosity n(%) at the first temperature 21 is used as the viscosity 1.
    — 16 —
    Although in the method steps described above only nuclear magnetic measurements were performed on the medium 5 with the first temperature d i , the spin-lattice relaxation time constant T i {9:2) could be determined at the second temperature d i . A time-consuming implementation of nuclear magnetic measurements, from which the spin-lattice relaxation time constant T;i{(3:)}) of the medium is redetermined at the second temperature &: of the medium 5, as at the first temperature of the medium, is is no longer necessary, resulting in a shorter time commitment.
    Instead, the spin lattice relaxation time constant Ti{dz2) at the second temperature of the medium 5 is derived from that at the first temperature &1 . In addition to the process, the following method steps are also performed: In a sixth method step 11, the medium 5 has a second temperature $2 and is introduced into the measuring volume, in which it flows through the measuring tube 2 .
    In a seventh method step 12, nuclear magnetic measurements are performed on the medium 5 in the measuring volume.
    The medium 5 has the second temperature Ó: during the measurements. In an eighth method step 13, a flow rate of the medium 5 with the second temperature 5: through the measuring tube 2 is determined with the aid of the nuclear magnetic measurements performed in the previous method step and the previously determined spin-lattice relaxation time constant Ti (9:2) of the medium 5 at the second temperature Ó:. Although the medium 5 now has the second temperature UO: which is different from the first temperature $i, and the value of the spin-lattice relaxation time constant Tl has been changed by the temperature change AS = 9: - $1, the determination of the flow rate of the medium 5 through the measuring tube 2 possible because the spin-lattice relaxation time constant Ti (92) at the second temperature dz of the medium 5 is derived from the spin-lattice
    - 17 = relaxation time constant Ti (91) of the medium 5 at the first temperature Ii.
    A time-consuming performance of nuclear magnetic measurements, from which the spin-lattice relaxation time constant T1 (82) of the medium 5 is determined again at both the second temperature 2 of the medium 5 and the first temperature 31 of the medium 5, is no longer necessary, whereby the result takes less time.
    - 18 — Reference number 1 nuclear magnetic flow meter 2 measuring tube 3 measuring instrument 4 computer 5 medium 6 first method step 7 second method step 8 third method step 9 fourth method step 10 fifth method step 11 sixth method step 12 seventh method step 13 eighth method step
    权利要求:
    Claims (19)
    [1]
    1. Method for determining at least one derived property of a medium (5), - wherein a medium (5) with a first temperature {$1} is introduced into a measuring volume, - wherein nuclear magnetic measurements are performed on the medium ( 5) with the first temperature (Ji) in the in the measurement volume, — wherein from the nuclear magnetic measurements at least one property of the medium (5) at the first temperature (8:1) is determined from the group {spin-lattice relaxation time constant (Ti{(d:)}), spin-spin relaxation time constant (T2{(3:)}) and diffusion time constant (D{Ó31))} characterized - that from the at least one property a viscosity (n{91 )) of the medium (5) at the first temperature (5:1), and - that at least one derived property is determined of the medium (5) at a second temperature (dz) from the group {spin lattice relaxation time constant (Ti{92))}, spin-spin relaxation time constant (T:{9:)) and diffusion time constant {(D{(02))} by of the at least one property of the medium (5) at the first temperature (51), the viscosity (n{(d:1))} of the medium (5) at the first temperature (91), the first temperature ( 1) and the second temperature (3&2).
    [2]
    Method according to claim 1, wherein the spin-lattice relaxation time (Ti(ô:1) of the medium (5) at the first temperature (&:) is determined as the at least one property, characterized - that a logarithmic mean or a weighted average of the spin lattice relaxation time constants (Ti, 1(Ó01)) 40 is determined and
    _ 2 0 — - that the viscosity (n{(31)) of the medium (5) at the first temperature (91) from the logarithmic mean or weighted mean of the spin lattice relaxation time constants using the first formula 134 (3 ) xk, (7(8))" +k (7(3 )) is determined by — 0.37831 S ki S 3.3887, 0.45419 S ks S 1.2055, 0.88616:107%3 £ ka S 26.547:107%3 and -0.023116 £ ka S 0.34519, — preferably 0.75655 £ ki S 2.2618, 0.63180 S ky < 1.0075, 1.7727:107%3 £ k3 S 14.603:10% and 0.10966 =< kg S 0.29381, - particularly preferably ki = 1.1348, ks = 0.80942, Ks = 2.6592:107% and kg = 0.24243.
    [3]
    A method according to claim 1 or 2, wherein the spin-spin relaxation time constant (T2(J1)) of the medium (5) at the first temperature (9:1) is determined as the at least one property, characterized by - that a logarithmic mean or a weighted average of the spin-spin relaxation time constants {(Tz,1(Ó01)) is determined and - that the viscosity (n{(31)) of the medium (5) at the first temperature (911 ) from the logarithmic mean or the weighted mean of the spin-spin relaxation time constants using the second formula 71, 14 (3) xk (27(3 )” is determined by — 0.37831 S ks £ 3.3887 and 0 .45419 S ke < 1.2055, - preferably 0.75655 £ ks S 2.2618 and 0.63180 £ kg < 1.0075, - particularly preferably ks = 1.1348 and ks = 0.80942.
    [4]
    A method according to any one of claims 1 to 3, wherein the diffusion time constant (D{(Â1)) of the medium (5) at the first temperature (&:) is determined as the at least one property, characterized in that the viscosity (n{91)) of
    _ 21 _ the medium (5) at the first temperature (91) from the diffusion time constant using the third formula D(8)zk;(n(3))" is determined by — 0.2445-10% £ky £ 2.2005-10% and 0.375 = ke 0,6 0.650, — preferably 0.48900-107% Sky < 1.4670-107% and 0.43750 < ks S 0.57500, — particularly preferably k; 0.7335-107% und ks = 0.500 if the diffusion time constant (D{(1)) of the medium (5) at the first temperature (Ji) is less than or equal to 3-107 m2/s and with — 0, 05777:1009<S ky S 0.5199:1009, 0.125 S ke £ 0.375, — preferably 0.11554:1072 S ky S 0.34660 107%, 0.18750 < ks S 0.31250, — particularly preferably k7 = 0.1733:10°%, ks = 0.25 if the diffusion time constant (D($:1)) of the medium (5) at the first temperature (31) is greater than 3:10: m 2/s.
    [5]
    Method according to one of Claims 1 to 4, characterized in that at least one relaxation time constant (T+ (82), i={1,2}) of the medium (5) at the second temperature (92) is the group {spin lattice relaxation time constant (T:{d:2)) and spin spin relaxation time constant (T2{(Â>2))} using a temperature coefficient (dT:/d9) of a relaxation time constant (T:) from the group {spin lattice relaxation time constant (Ti) and spin spin relaxation time constant (Tz)} is determined as the at least one derived property.
    [6]
    Method according to claim 5, characterized in that the at least one relaxation time constant {(T:{82), i={1,2}) of the medium (5) at the second temperature (2) by means of the fourth formula 1(8)~1(8)e" or using the Taylor polynomial of the fourth formula
    _ 22 _ according to the fifth formula T(%)~T (4) 1+7(4-9)+..] or using the approximation formula of the fourth formula according to the sixth formula 1(9)=1,( 9)+2(4-9) is determined, whereby according to the seventh formula round LA (4) a8
    [7]
    Method according to Claim 5 or 6, characterized in that the Temperature Coefficient (dT i /d9) according to the eighth formula Dm ke is determined with - 0.013036 S ks = 0.11732 and 1.2604:107%% S ki < 5.0416-1073, — preferably 0.026072 £S ks £ 0.078213 and 1.8906-1073 < ko £ 3.7812-107%, — particularly preferably ks = 0.039107 and kis = 2,5208 107%.
    [8]
    Method according to claim 7, characterized in that the viscosity (n{d:i)) of the medium (5) at the first temperature (91) is used.
    [9]
    A method according to any one of claims 5 to 8, wherein the spin lattice relaxation time constant (T:i{82)) is determined at the second temperature (Jz) of the medium (5), characterized in - that a logarithmic mean whether a weighted average of the spin-lattice relaxation time constants (Ti,(02) ) is determined and - that the viscosity (n{d:)) of the medium (5) at the second temperature (92) from the logarithmic mean or the
    - 23 — weighted average of the spin-lattice relaxation time constants (T1,11(02)) is determined using the first formula.
    [10]
    A method according to any one of claims 5 to 9, wherein the spin-spin relaxation time constant {Tz{82)) is determined at the second temperature (82) of the medium (5), characterized in - that a logarithmic mean whether a weighted average of the spin-spin relaxation time constants (Tz,1m{Âz)) is determined and - that the viscosity (n(d2)) of the medium (5) at the second temperature (92) from the logarithmic mean or the weighted average of the spin-spin relaxation time constants (T2,mm{02)) is determined using the second formula.
    [11]
    Method according to claim 9 or 10, characterized in that the diffusion time constant (D{ô:2)} of the medium (5) at the second temperature (92) consists of the viscosity ({n{(d:)) of the medium (5) at the second temperature (82) is determined by the third formula.
    [12]
    Method according to one of Claims 5 to 11, characterized in that - the medium (5) with the second temperature (92) is flowed through the measuring volume, - that nuclear magnetic measurements are performed on the medium (5) with the second temperature (dz) in the measurement volume and - that a flow rate of the medium (5) with the second temperature (Â:) using the nuclear magnetic measurements, the spin-lattice relaxation time constants (T;i{(0:)) and/or the spin-spin relaxation time constants {(T2{9:))}) of the medium (5) is determined at the second temperature (Jz).
    [13]
    Method according to claim 12, characterized in that the flow rate of the medium (5) at the second temperature (3:2) is converted into a flow rate of the medium (5) at the first temperature (91) or a further temperature (Jz).
    40
    _ 24 _
    [14]
    Method according to claim 13, characterized in that the density (p) and/or the viscosity (n) of the medium (5) is or will be used for the conversion.
    [15]
    Method according to one of Claims 1 to 14, characterized in that a density (p) of the medium (5) is determined from the viscosity (n) of the medium (5).
    [16]
    Process according to Claim 15, characterized in that the density is obtained from the viscosity using the formula prk PE with — 941.82 ky; S 1025.8, 180.65 S kiz £ 264.61 and 0.15921 £ kia £ 0.37899, - preferably 962.81 =< ki; £1004.8, 201.64 £S kie S 243.62 and 0.21415 < ki3 S 0.32405, particularly preferably k11 = 983.80, kiz = 222.63 and kiz = 0.26910.
    [17]
    17. Nuclear magnetic flow meter (1) with a measuring tube (2), a measuring instrument (3) and a computer (4), wherein the measuring tube (2) comprises a measuring volume, the measuring instrument (3) is designed for nuclear magnetic measurements and the computer (4) to perform the method according to any one of claims 1 to 16.
    [18]
    A computer program product comprising instructions which, when the program is executed by a computer (4), prompts it to perform the method according to any one of claims 1 to 16.
    [19]
    A computer-readable storage medium comprising instructions which, when the program is executed by a computer (4), prompts it to perform the method according to any one of claims 1 to 16.
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    同族专利:
    公开号 | 公开日
    US11237236B2|2022-02-01|
    DE102019125121B4|2021-06-10|
    US20210080529A1|2021-03-18|
    DE102019125121A1|2021-03-18|
    NL2026489B1|2021-10-04|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US20100271019A1|2009-04-22|2010-10-28|Vivek Anand|Predicting properties of live oils from nmr measurements|
    US6891369B2|1998-08-13|2005-05-10|Schlumberger Technology Corporation|Nuclear magnetic resonance method and logging apparatus for fluid analysis|
    US7718434B2|2003-06-11|2010-05-18|Schlumberger Technology Corporation|Method for determining the characteristics of crude oils and mixtures of chain molecules by diffusion and relaxation measurements|
    CA2638697C|2008-08-15|2014-11-18|Schlumberger Canada Limited|Methods for determining in situ the viscosity of heavy oil using nuclear magnetic resonance relaxation time measurements|
    CA2932002A1|2013-12-13|2015-06-18|Shell Internationale Research Maatschappij B.V.|Method of interpreting nmr signals to give multiphase fluid flow measurements for a gas/liquid system|
    US20160076924A1|2014-09-16|2016-03-17|Spinlock Srl|Field cycling magnetic resonance based method and apparatus to measure and analyze flow properties in flowing complex fluids|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE102019125121.4A|DE102019125121B4|2019-09-18|2019-09-18|Method for determining a derived property of a medium and a nuclear magnetic measuring device, computer program product and computer-readable storage medium for such a medium|
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