• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
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    • 专利摘要:

    公开号:NL2013996A
    申请号:NL2013996
    申请日:2014-12-17
    公开日:2015-06-18
    发明作者:Zhendong Liu；Yanjun Zhou；Gongrang Li；Zuohui Li；Shouju Zhou；Yegui Hou；Xueqin Wu；Guanqi Cheng
    申请人:Sinopec Oilfield Service Corp；Drilling Tech Res Inst Xin；
    IPC主号:
    专利说明:

    Title: Plugging Material and Drilling Fluid Additive and Method of
    Application Thereof
    Technical Field
    The present disclosure relates to the technical field of petroleum drilling fluid, in particular to a plugging material and drilhng fluid additive which can improve the plugging property of an oil base drilhng fluid, and a method of application thereof.
    Technical Background
    Oil base drilling fluid, also called oil base mud, is basically composed of oil, water, organic clay, and oil soluble chemical processing agent. Oil base drilling fluid has the advantages of strong inhibity, high temperature resistance, and resistance to calcium salt corrosion, desirabihty for a stable wellbore, excellent lubricity, and small damage to the hydrocarbon reservoir. It is often used in water sensitive formation. Exploiting shale oil reservoir can cause collapse, because the mud stone and shale in the formation easily hydrates and disperses in water. Thus, oil base drilling fluid is widely used in oilfield exploitation and development in the world. The plugging property of an oil base drilling fluid directly influences the plugging effect of the oil base drilling fluid on pores and fractures in the shale, thereby determining the water invasion degree and the stabihty of the wellbore. Therefore, it is necessary to enhance the plugging property of the oil base drilling fluid, reduce the fluid filtration of the drilling fluid and the water invation to themud shale formation, thereby ensuring the stability of the wellbore.
    At present, considerable efforts are made around the world in the study of plugging additives for oil base drilhng fluid and the fluid filtration control additives. There are many additives that have been well developed and have achieved favorable effects. For example, in a paper entield The
    Synthesis of an Oil Base Expanding Plugging Agent and Performance
    Assessmen Thereof, and authored by Fan ZHANG, an expansible plugging agent for oil base drilling fluid is synthesized from basic materials including styrene, oil absorbent monomer, cross-linking agent, initiating agent, polyvinyl alcohol, and calcium carbonate (see Journal ofYanftze University, natural science edition, vol. 7(3), 2010). In a paper entitled Application of Oil Base Drilling Fluid System with Strong Plugging Capacity in a W11-4D Oilfield, and authored by Wenjun HU etc., an oil base drilling fluid having strong plugging capacity is presented, using emulsified asphalt, resin, and calcium carbonate superfine powder as the plugging agent (see Drilling Fluid and Completion Fluid, vol. 24 (3), 2007). Chinese patent CN 102863947A discloses a drilling fluid having strong inhibity and plugging capacity, the strong plugging agent can be a composition containing one or more selected from a group consisting of cationic modified asphalt, sulfonated bitumen, natural asphalt powder, cationic emulsified asphalt, colloid asphalt, latex, emulsified paraffin. Chinese patent CN 103013469A discloses a method of utilizing nanometer silicon dioxide to improve the properties of water-base drilling fluid at different temperatures. The patent hterature provides a method of utilizing nano-silica to improve the properties of water-base drilling fluid at different temperatures, wherein nano-silica dispersion liquid is added into the base mud, so that the base mud forms a thinner and more compacted filter cake, thereby improving the effect of fluid filtration reduction. However, the abovementioned technologies have the following defects, such as insufficient plugging capacity against micropores and microfractures in the shale rocks, which causes water invasion of certain degree into the shale when drilling into a relatively long shale well section, rendering larger risks of collapse.
    Summary of the Invention
    The objective of the present disclosure is to eliminate the abovementioned defects and provide a plugging material and a method of application thereof. The present application can improve the quality of the filter cake and reduce the fluid filtration of the oil base drilling fluid. In the meantime, the plugging particles in the oil base drilhng fluid can penetrate into the pores and depths of fractures in the formations, so that the plugging capacity of the oil base drilling fluid can be enhanced, thus guarantee the stability of the wellbore and improve the plugging property of the drilling fluid.
    The present disclosure provides the following technical solution, in order to achieve the objective thereof.
    The present disclosure provides a plugging material, comprising nano-silica and sepiohte, wherein a weight ratio of nano-sihca to sepiolite is 4-5:1-2.
    In a preferred embodiment according to the present disclosure, the particle size of nano-silica is 20-500 nm.
    In a preferred embodiment according to the present disclosure, the particle size of sepiolite is 200-500 mesh.
    The present disclosure further provides an oil base drilling fluid additive, comprising: plugging material of 1-3 parts by mass, emulsifying agent of 0.5-2 parts by mass, wetting agent of 0.5-2 parts by mass, and calcium chloride aqueous solution of 0.1-1 part by mass.
    In a preferred embodiment according to the present disclosure, the emulsifying agent is selected from at least one of span-80, calcium alkylbenzene sulfonate, and oleic acid.
    In a preferred embodiment according to the present disclosure, the wetting agent is selected from at least one of dodecylbenzene sulfonic acid, dodecyltrimethylammonium bromide, and calcium naphthenate.
    In a preferred embodiment according to the present disclosure, the concentration of the calcium chloride aqueous solution is in a range of 20 -30 wt%.
    The present disclosure further provides a method for improving the plugging property of a drilling fluid by using the oil base drilhng fluid additive, comprising: adding said plugging material, emulsifying agent, wetting agent, and the calcium chloride aqueous solution into the oil base drilhng fluid according to said ratios, and stirring the mixture for emulsification, thereby improving the plugging property of the drilling fluid.
    In a preferred embodiment according to the present disclosure, the oil base drilling fluid additive is added in each 100 ml oil base drilling fluid in an amount comprising plugging material of 1-3 g, emulsifying agent of 0.5-2 g, wetting agent of 0.5-2 g, and calcium chloride aqueous solution of 0.1-1 g.
    In a preferred embodiment according to the present disclosure, an ultrasonic particulate matter dispersion emulsifying mixer is used for stirring and emulsifying the oil base drilhng fluid containing the oil base drilling fluid additive.
    In a preferred embodiment according to the present disclosure, the calcium chloride aqueous solution is atomized and injected into the oil base drilling fluid.
    The present disclosure has the following advantages. 1. The present disclosure prepares the plugging material using nano-silica and sepiohte. Nano-silica can enter into the micropores and fractures of the formation, so that the plugging effect of the drilling fluid can be enhanced, the penetration of drilhng fluid into the formation can be retarded, the tendency of swelhng and chipping of the formation can be slowed down, and the stability of the wellbore can be improved. Sepiolite can form bridges across the pores and fractures in the formation due to the fiber structure thereof, thereby enhancing the capacity of forming a plugged zone and improving the compactness of the plugged zone. 2. The oil base drilling fluid additive according to the present disclosure comprises not only the plugging material, but also the emulsifying agent and wetting agent, so that the properties of the oil base drilling fluid would not fluctuate due to the addition of the particulate matter, thereby avoiding affecting the drilling operation. 3. In the present disclosure, the calcium chloride aqueous solution is atomized into small droplets and injected into the oil base drilling fluid.
    In this case, these small droplets in the oil phase can further plug the micropores and microfractures in the formation, thereby improving the plugging effect. 4. The present disclosure uses an ultrasonic particulate matter dispersion emulsifying mixer for stirring and emulsifying the oil base drilling fluid, into which various materials are added. In this case, it is favorable for water phase to emulsify and disperse in the oil base drilling fluid. As a result, the emulsion stabihty of the oil base drilling fluid is improved.
    Detailed Description of the Embodiments
    The present disclosure will be explained in details with reference to the examples. However, the scope of the present disclosure is not limited hereto.
    The materials used in the present disclosure are commercially available. The main ingredient of the span-80 in the present disclosure is Sorbitan oleate. The oil base drilling fluid is prepared according to the company standard Q_SH 0279-2009 of the China Petroleum & Chemical Corporation.
    Example 1 A plugging material according to the present example comprises nano-silica having a particle size of 20 nm and sepiolite having a particle size of 200 mesh. A weight ratio of the nano-silica to the sepiolite is 4:1. An oil base drilling fluid additive according to the present example comprises plugging material of 1 part by mass, span-80 of 0.5 parts by mass as the emulsifying agent, dodecylbenzene sulfonic acid of 0.5 parts by mass as the wetting agent, and calcium chloride aqueous solution of 0.1 parts by mass. A method for improving the plugging property of a drilling fluid by using the oil base drilling fluid additive according to example 1 comprises the following steps.
    In each 100 ml oil base drilling fluid, lg plugging material of the present example, which is prepared by uniformly mixing the nano-silica having a particle size of 20 nm with the sepiolite having a particle size of 200 mesh based on a weight ratio of 4:1, is added. Then, 0.5 g span-80, 0.5 g dodecylbenzene sulfonic acid, and 0.1 g calcium chloride aqueous solution having a concentration of 20 wt% are added into the oil base drilling fluid in sequence. Next, the oil base drilling fluid is stirred uniformly using an ultrasonic particulate matter dispersion emulsifying mixer. The fluid filtration of the oil base drilling fluid according to the present example under high temperature and high pressure measured according to industrial standard SY/T5621-93 is 4.6 ml.
    Example 2 A plugging material according to the present example comprises nano-silica having a particle size of 500 nm and sepiolite having a particle size of 500 mesh. A weight ratio of nano-sihca to sepiolite is 4:1. An oil base drilling fluid additive according to the present example 2 comprises plugging material of 3 parts by mass, span-80 of 2 parts by mass as the emulsifying agent, dodecylbenzene sulfonic acid of 0.5 parts by mass as the wetting agent, and calcium chloride aqueous solution of 1 part by mass.
    In each 100 ml oil base drilling fluid, 3 g plugging material of the present example is added. Then, 2 g span-80, 2 g dodecylbenzene sulfonic acid, and 1 g calcium chloride aqueous solution having a concentration of 20 wt% are added into the oil base drilling fluid in sequence. The calcium chloride aqueous solution is atomized into small droplets, and then injected into the oil base drilling fluid. Next, the oil base drilhng fluid is stirred uniformly using an ultrasonic particulate matter dispersion emulsifying mixer. The fluid filtration of the oil base drilling fluid according to the present example under high temperature and high pressure measured according to industrial standard SY/T5621-93 is 4.0 ml.
    Example 3 A plugging material according to the present example comprises nano-silica having a particle size of 40 nm and sepiolite having a particle size of 300 mesh. A weight ratio of nano-sihca to sepiolite is 5:2. An oil base drilling fluid additive according to the example 3 comprises plugging material of 2 parts by mass, span-80 of 1 part by mass as the emulsifying agent, dodecylbenzene sulfonic acid of 1 part by mass as the wetting agent, and calcium chloride aqueous solution of 0.5 parts by mass.
    In each 100 ml oil base drilling fluid, 2 g plugging material of the present example is added. Then, 1 g span-80, 1 g dodecylbenzene sulfonic acid, and 0.5 g calcium chloride aqueous solution having a concentration of 20 wt% are added into the oil base drilhng fluid in sequence. Next, the oil base drilhng fluid is stirred uniformly using an ultrasonic particulate matter dispersion emulsifying mixer. The fluid filtration of the oil base drilling fluid according to the present example under high temperature and high pressure measured according to industrial standard SY/T5621-93 is 4.2 ml.
    Example 4 A plugging material according to the present example comprises nano-silica having a particle size of 40 nm and sepiolite having a particle size of 200 mesh. A weight ratio of nano-sihca to sepiolite is 3:1. An oil base drilling fluid additive according to the example 4 comprises plugging material of 2 parts by mass, span-80 of 1 part by mass as the emulsifying agent, calcium naphthenate of 0.5 parts by mass as wetting agent, and calcium chloride aqueous solution of 0.3 parts by mass (having a concentration of 25 wt%).
    In each 100 ml oil base drilling fluid, 2 g plugging material of the present example, which is prepared by uniformly mixing the nano-silica having a particle size of 40 nm and the sepiolite having a particle size of 200 mesh based on a weight ratio of 3:1, is added. Then, 1 g span-80, 0.5 g calcium naphthenate, and 0.3 g calcium chloride aqueous solution having a concentration of 25 wt% are added into the oil base drilling fluid in sequence. The calcium chloride aqueous solution is atomized into small droplets, and then injected into the oil base drilling fluid. Next, the oil base drilling fluid is stirred uniformly using an ultrasonic particulate matter dispersion emulsifying mixer. The fluid filtration of the oil base drilling fluid according to the present example under high temperature and high pressure measured according to industrial standard SY/T5621-93 drops from an initial value of 7.8 ml to 4.0 ml which is achieved after various materials are added.
    Comparative example 1
    After measurement according to the industrial standard SY/T5621-93 using the same method, the fluid filtration of the oil base drilling fluid according to the present comparative example, i.e. no plugging material or oil base drilling fluid additive is added, under high temperature and high pressure is 7.8 ml.
    From the results of examples 1 to 4 and that of comparative example 1, it can be determined that the plugging property of the oil base drilling fluid containing the plugging material and oil base drilling fluid additive according to the present disclosure is significantly enhanced, and the fluid filtration thereof is evidently reduced.
    权利要求:
    Claims (10)
    [1]
    Clogging material comprising nanosilica and sepiolite, wherein the weight ratio of nanosihca to sepiolite is 4-5: 1-2.
    [2]
    The clogging material of claim 1, wherein the particle size of nanosilica is 20-500 nm.
    [3]
    The clogging material of claim 1 or claim 2, wherein the particle size of sepiolite is 200-500 mesh.
    [4]
    An oil-based drilling fluid additive containing the clogging material, comprising: -1-3 parts by weight of clogging material according to any one of claims 1 to 3, -0.5-2 parts by weight of emulsifying agent, -0.5-2 parts by weight of wetting agent, and -0.1-1 parts by weight of an aqueous solution of calcium chloride.
    [5]
    The drilling fluid additive of claim 4, wherein the emulsifying agent is selected from at least one of span-80, calcium alkylbenzene sulfonate and oleic acid.
    [6]
    The drilling fluid additive according to claim 4 or claim 5, wherein the wetting agent is selected from at least one of dodecylbenzene sulfonic acid, dodecyl trimethyl ammonium bromide and calcium naphthenate.
    [7]
    The drilling fluid additive of any one of claims 4 to 6, wherein the concentration of the aqueous solution of calcium chloride is in a range of 20-30% by weight.
    [8]
    A method for improving the clogging property of a drilling fluid by using the ohe drilling fluid additive according to any of claims 4 to 7, comprising: combining clogging material, emulsifying agent, wetting agent, and an aqueous solution of calcium chloride to an oil-based drilling fluid according to said ratios, and stirring the mixture for emulsification, thereby improving the clogging property of the drilling fluid.
    [9]
    The method of claim 8, wherein to each 100 ml of oil-based drilling fluid is added an amount of oil-based drilling fluid additive which is 1-3 g of clogging material, 0.5-2 g of emulsifying agent, 0.5-2 g of wetting agent and 0.1-1 g of an aqueous solution of calcium chloride.
    [10]
    The method of claim 8 or claim 9, wherein the aqueous solution of calcium chloride is atomized and injected into the oil-based drilling fluid.
    类似技术:
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    同族专利:
    公开号 | 公开日
    CN104710968A|2015-06-17|
    NL2013996B1|2016-07-04|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US4508628A|1983-05-19|1985-04-02|O'brien-Goins-Simpson & Associates|Fast drilling invert emulsion drilling fluids|
    CN101421371A|2006-04-19|2009-04-29|钻井工程解决方案公司|Methods of preparing hydrocarbon, water and organophilic clay emulsions and compositions thereof|
    US7741250B2|2006-05-11|2010-06-22|Chevron Phillips Chemical Company Lp|Wellbore servicing fluids comprising grafted homopolymers and methods of using same|
    CA2723811C|2008-05-09|2013-09-10|M-I Llc|Wellbore fluids containing sized clay material and methods of use thereof|
    US8476201B2|2010-12-23|2013-07-02|Halliburton Energy Services, Inc.|Drilling fluids having reduced sag potential and related methods|
    CN103045184B|2012-12-31|2014-11-05|中国地质大学（北京）|Ultralow-permeation plugging anti-sloughing oil layer protective agent for drilling fluid and preparation method of protective agent|
    CN104559977B|2013-10-27|2018-03-30|中国石油化工集团公司|A kind of material and preparation, application process for improving drilling fluid filter cake quality|RU2662720C1|2017-10-05|2018-07-27|Виталий Вячеславович Сергеев|Method of damping oil and gas wells with highly permeable fractures of the hydraulic fracturing |
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    CN201310693508|2013-12-17|
    CN201310693508.XA|CN104710968A|2013-12-17|2013-12-17|Plugging material and drilling fluid additive and use method thereof|
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