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CN106398669B - Preparation method of pressure-bearing plugging agent for drilling fluid - Google Patents

Preparation method of pressure-bearing plugging agent for drilling fluid Download PDF

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CN106398669B
CN106398669B CN201610778008.XA CN201610778008A CN106398669B CN 106398669 B CN106398669 B CN 106398669B CN 201610778008 A CN201610778008 A CN 201610778008A CN 106398669 B CN106398669 B CN 106398669B
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drilling fluid
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plugging agent
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CN106398669A (en
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王刚毅
王昕立
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Sichuan Shangzhideng New Material Technology Co Ltd
Sichuan Zhengrong Industrial Co ltd
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    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09KMATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K8/00Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
    • C09K8/02Well-drilling compositions
    • C09K8/03Specific additives for general use in well-drilling compositions
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09KMATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K8/00Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
    • C09K8/02Well-drilling compositions
    • C09K8/03Specific additives for general use in well-drilling compositions
    • C09K8/035Organic additives
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09KMATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K8/00Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
    • C09K8/42Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells
    • C09K8/426Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells for plugging
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09KMATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K2208/00Aspects relating to compositions of drilling or well treatment fluids
    • C09K2208/08Fiber-containing well treatment fluids
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09KMATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K2208/00Aspects relating to compositions of drilling or well treatment fluids
    • C09K2208/12Swell inhibition, i.e. using additives to drilling or well treatment fluids for inhibiting clay or shale swelling or disintegrating

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  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
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  • Sealing Material Composition (AREA)

Abstract

本发明公开了一种钻井液用堵漏剂的制备方法,按重量份配比计,取核桃壳粉40‑50份、稻草裂解纤维30‑40份、碳酸钙粉4‑8份、水解聚丙烯腈铵盐1‑3份、抗渗剂10‑20份、羧甲基纤维素5‑10份、可再分散乳胶粉5‑10份、改性沥青10‑20份,置于搅拌设备中混合1‑2小时,在60℃下恒温烘干、造粒,平均粒径为20‑300目,即得钻井液用承压堵漏剂。本发明所制得的堵漏剂具有堵漏效果好,承压强度高,材料廉价易得的优点。The invention discloses a preparation method of a plugging agent for drilling fluid. According to the proportion by weight, 40-50 parts of walnut shell powder, 30-40 parts of rice straw cracked fiber, 4-8 parts of calcium carbonate powder, hydrolytic polymerization 1-3 parts of acrylonitrile ammonium salt, 10-20 parts of anti-penetration agent, 5-10 parts of carboxymethyl cellulose, 5-10 parts of redispersible latex powder, 10-20 parts of modified asphalt, placed in the mixing equipment Mix for 1-2 hours, dry at a constant temperature of 60°C, and granulate. The average particle size is 20-300 mesh, and the pressure-bearing plugging agent for drilling fluid is obtained. The leak-stopping agent prepared by the invention has the advantages of good leak-stopping effect, high pressure-bearing strength, and cheap and easy-to-obtain materials.

Description

一种钻井液用承压堵漏剂的制备方法A kind of preparation method of pressure-bearing plugging agent for drilling fluid

技术领域technical field

本发明涉及一种石油钻井用助剂,尤其涉及一种钻井液用承压堵漏剂的制备方法,属于石油钻井技术领域。The invention relates to an auxiliary agent for petroleum drilling, in particular to a preparation method of a pressure-bearing plugging agent for drilling fluid, and belongs to the technical field of petroleum drilling.

背景技术Background technique

在石油勘探开发过程中,井漏是最为常见的一种复杂现象,尤其在微裂缝地层、渗透性地层、页岩地层、煤层、破碎带地层及储层,井壁失稳、井漏风险大大增加;井壁失稳通常造成井壁垮塌,引发卡钻、填埋钻具的风险,而井漏的发生,极大地增加了储层损害,钻井液配置成本,延长了钻井周期,甚至带来井控风险,造成极大的经济损失。目前,行业中并无一种既能提高井壁稳定性,又能进行承压填充、对井壁起到强化作用的防漏产品;而传统的随钻堵漏剂、锯末粉产品,由于粒径级配效果不佳,只能够用于处理渗透性漏失及小漏,随钻损耗较大,需要不断补充;且漏失处理后容易反复发生井漏,大大降低了钻完井效率;该类处理剂不能达到较好的稳定井壁、预防漏失及提高井壁承压能力的效果,且大部分产品中含有聚合物成分,对钻井液流变性影响较大,制约了该类产品的推广应用。In the process of petroleum exploration and development, lost circulation is the most common complex phenomenon, especially in micro-fractured formations, permeable formations, shale formations, coal seams, fractured zone formations and reservoirs, where wellbore instability and lost circulation risks are high. increase; wellbore instability usually causes the wellbore to collapse, causing the risk of drill sticking and burial of drilling tools, and the occurrence of lost circulation greatly increases reservoir damage, drilling fluid allocation costs, prolongs the drilling cycle, and even brings Well control risks, resulting in great economic losses. At present, there is no anti-leakage product in the industry that can not only improve the stability of the well wall, but also perform pressure-bearing filling and strengthen the well wall; while the traditional plugging agent while drilling and sawdust powder products, due to the particle size The diameter grading effect is not good, and it can only be used to deal with permeability loss and small leakage, and the loss while drilling is large, which needs to be replenished continuously; and lost circulation is easy to occur repeatedly after leakage treatment, which greatly reduces the efficiency of drilling and completion; this type of treatment The additives cannot achieve better effects of stabilizing the wellbore, preventing leakage and improving the pressure bearing capacity of the wellbore, and most of the products contain polymer components, which have a great impact on the rheology of the drilling fluid, which restricts the popularization and application of such products.

如公开号为CN105441044A,名称为“一种油基钻井液用堵漏剂”的发明专利,该专利公开堵漏剂包括:纤维15~20%,核桃壳10~25%,吸油聚合物颗粒20~40%,油基核壳膨胀封堵剂40~60%,将上述原料混合均匀即为油基钻井液用堵漏剂。该专利中包含油基核壳膨胀封堵剂,属于化学堵漏材料,其价格昂贵、施工配置复杂,仍不能得到推广应用。且没有考虑级配因素,无法进行随钻堵漏,对微裂缝的封堵不足。For example, the publication number is CN105441044A, and the invention patent titled "a plugging agent for oil-based drilling fluid" discloses that the plugging agent includes: 15-20% of fiber, 10-25% of walnut shell, and 20% of oil-absorbing polymer particles. ~40%, oil-based core-shell expansion plugging agent 40-60%, mix the above raw materials evenly to get the plugging agent for oil-based drilling fluid. The patent contains an oil-based core-shell expansion plugging agent, which is a chemical plugging material, which is expensive and complicated in construction configuration, so it cannot be popularized and applied. And without considering the gradation factor, it is impossible to carry out plugging while drilling, and the plugging of micro-fractures is insufficient.

又如公开号为CN102453475A,名称为“一种石油钻井用堵漏剂及其制备方法和应用”的发明专利,该专利公开堵漏剂包含堵漏液A和堵漏液B,堵漏液A包含海藻酸盐、核桃壳和水,以水为100重量份计,海藻酸盐:0.5~0.8重量份,核桃壳:0~5重量份;堵漏液B包含油井水泥、纤维和水,以水为100重量份计,油井水泥:200~250重量份,纤维:0.5~1重量份;堵漏液A和堵漏液B的体积比为1∶2~1∶3。制备方法包括:a、海藻酸盐溶于水配成溶液,加入核桃壳,制得堵漏液A;b、油井水泥和水配成水泥浆,加入纤维,制得堵漏液B。该发明属于凝胶堵漏和架桥堵漏混合材料,同样未考虑材料级配,对微裂缝封堵效果不佳。Another example is an invention patent with the publication number CN102453475A titled "a plugging agent for oil drilling and its preparation method and application". Contains alginate, walnut shells and water, based on 100 parts by weight of water, alginate: 0.5-0.8 parts by weight, walnut shells: 0-5 parts by weight; the plugging fluid B contains oil well cement, fiber and water, and Water: 100 parts by weight, oil well cement: 200-250 parts by weight, fiber: 0.5-1 part by weight; the volume ratio of the plugging fluid A and the plugging fluid B is 1:2-1:3. The preparation method includes: a. dissolving alginate in water to make a solution, adding walnut shells to prepare the plugging fluid A; b. preparing oil well cement and water to make cement slurry, adding fibers to prepare the plugging fluid B. This invention belongs to the mixed material of gel plugging and bridging plugging, which also does not consider material gradation, and has poor plugging effect on micro-cracks.

发明内容Contents of the invention

本发明旨在解决现有技术中的堵漏剂处理剂不能达到较好的稳定井壁、预防漏失、提高井壁承压能力的效果以及成本高的问题,提出一种新的钻井液用堵漏剂的制备方法,将特定比例的核桃壳粉、稻草裂解纤维、改性沥青以及多种助剂的混合使用,能够有效对微裂缝进行承压填充,预防漏失、垮塌,提高井壁承压能力和稳定性。The invention aims to solve the problem that the lost circulation agent treatment agent in the prior art can not achieve good stability of the well wall, prevent leakage, improve the effect of the pressure bearing capacity of the well wall and the high cost, and proposes a new plugging agent for drilling fluid. The preparation method of leakage agent, the mixed use of walnut shell powder, rice straw pyrolysis fiber, modified asphalt and various additives in a specific proportion can effectively fill micro-cracks under pressure, prevent leakage and collapse, and improve the pressure bearing of well wall capacity and stability.

为了实现上述发明目的,本发明的技术方案如下:In order to realize the above-mentioned purpose of the invention, the technical scheme of the present invention is as follows:

一种钻井液用承压堵漏剂的制备方法包括以下步骤:A preparation method of a pressure-bearing plugging agent for drilling fluid comprises the following steps:

(1)首先提取稻草裂解纤维:对稻草原料进行叶、杆和穗的分离,弃去叶和穗,将杆切割成3-5cm,用质量浓度为5%碳酸氢钠液浸泡24小时,取出,保持水分含量10-15%,再通过膨化设备对杆进行膨化,得到棉球状的稻草裂解纤维;(1) First extract the cracked fiber of rice straw: separate the leaves, stems and ears of the rice straw raw material, discard the leaves and ears, cut the stem into 3-5cm, soak in 5% sodium bicarbonate solution for 24 hours, take out , keep the moisture content 10-15%, and then expand the rod through the expansion equipment to obtain the straw cracked fiber in the form of cotton ball;

(2)按重量份配比计,取核桃壳粉40-50份、稻草裂解纤维30-40份、碳酸钙粉4-8份、水解聚丙烯腈铵盐1-3份、抗渗剂10-20份、羧甲基纤维素5-10份、可再分散乳胶粉5-10份、改性沥青10-20份,置于搅拌设备中混合1-2小时,在60℃下恒温烘干、造粒,平均粒径为20-300目,即得钻井液用承压堵漏剂。(2) According to the ratio of parts by weight, take 40-50 parts of walnut shell powder, 30-40 parts of cracked rice straw fiber, 4-8 parts of calcium carbonate powder, 1-3 parts of hydrolyzed polyacrylonitrile ammonium salt, and 10 parts of impervious agent. -20 parts, 5-10 parts of carboxymethyl cellulose, 5-10 parts of redispersible latex powder, 10-20 parts of modified asphalt, mixed in a stirring device for 1-2 hours, and dried at a constant temperature of 60°C , granulation, the average particle size is 20-300 mesh, that is, the pressure-bearing plugging agent for drilling fluid.

所述抗渗剂由速溶硅酸钠和硬脂酸铝按照2:3的质量比混合而成。The anti-seepage agent is formed by mixing instant sodium silicate and aluminum stearate in a mass ratio of 2:3.

所述改性沥青由以下制备方法制得:先将360kg水与22kg十二烷基二甲基苄基氯化铵混合后,经过乳化机充分混合形成皂液并加热到45℃~80℃;再将皂液与580kg的90#沥青过胶体磨研磨混合得乳化沥青,再将该乳化沥青与加热到30℃~50℃的38kg液体氟硅橡胶在混融器内迅速混合,并充分搅拌,得改性沥青。The modified asphalt is prepared by the following preparation method: first mix 360kg of water and 22kg of dodecyldimethylbenzyl ammonium chloride, then fully mix them through an emulsifier to form a soap liquid and heat it to 45°C-80°C; Then grind and mix the soap solution with 580kg of 90# asphalt through a colloid mill to obtain emulsified asphalt, and then quickly mix the emulsified asphalt with 38kg of liquid fluorosilicone rubber heated to 30°C to 50°C in a mixer, and fully stir. modified asphalt.

本发明的有益效果如下:The beneficial effects of the present invention are as follows:

1.本发明堵漏剂的制备方法中,核桃壳粉、稻草裂解纤维、改性沥青、碳酸钙粉、水解聚丙烯腈铵盐、抗渗剂、羧甲基纤维素以及可再分散乳胶粉相互配合使用,具有封堵效果好,抗高温、高压能力强的特点,适用于裂缝性、溶洞性、破碎性地层和不易确定漏失位置的漏层堵漏,且采用的原料主要为植物颗粒和植物裂解纤维,具有价格低廉、无环保压力,对钻井液的性能影响小的优点。1. In the preparation method of the plugging agent of the present invention, walnut shell powder, rice straw cracked fiber, modified asphalt, calcium carbonate powder, hydrolyzed polyacrylonitrile ammonium salt, anti-seepage agent, carboxymethyl cellulose and redispersible latex powder Used in conjunction with each other, it has the characteristics of good plugging effect, strong resistance to high temperature and high pressure, and is suitable for leak plugging in cracked, cavernous, broken formations and leaky layers where it is difficult to determine the location of leakage, and the raw materials used are mainly plant particles and Plant cracked fiber has the advantages of low price, no environmental protection pressure, and little impact on the performance of drilling fluid.

2.本发明采用了稻草裂解纤维,该裂解纤维在堵漏剂使用时形成网状,使封堵效果更显著。2. The present invention adopts rice straw cracked fiber, which forms a network when the plugging agent is used, so that the plugging effect is more remarkable.

3.本发明通过加入速溶硅酸钠、硬脂酸铝,其速溶硅酸钠和硬脂酸铝不断发生结晶反应,形成不溶于水的结晶体,堵住毛细孔道,使得封堵剂的抗渗抗漏能力大大提高。3. The present invention adds instant sodium silicate and aluminum stearate, and its instant sodium silicate and aluminum stearate continuously undergo a crystallization reaction to form water-insoluble crystals to block the capillary channels and make the impermeability of the plugging agent The anti-leakage ability is greatly improved.

4.本发明加入的改性沥青具有低动力粘度、高抗裂性能以及优异的膨胀性,能在封堵剂使用时形成完整的网状结构,进一步提高了封堵剂的封堵效果。4. The modified asphalt added in the present invention has low dynamic viscosity, high crack resistance and excellent expansibility, and can form a complete network structure when the plugging agent is used, further improving the plugging effect of the plugging agent.

具体实施方式Detailed ways

下面结合实施例对本发明作进一步地详细说明,但本发明的实施方式不限于此。The present invention will be further described in detail below in conjunction with examples, but the embodiments of the present invention are not limited thereto.

实施例1Example 1

一种钻井液用承压堵漏剂的制备方法包括以下步骤:A preparation method of a pressure-bearing plugging agent for drilling fluid comprises the following steps:

(1)首先提取稻草裂解纤维:对稻草原料进行叶、杆和穗的分离,弃去叶和穗,将杆切割成3-5cm,用质量浓度为5%碳酸氢钠液浸泡24小时,取出,保持水分含量10-15%,再通过膨化设备对杆进行膨化,得到棉球状的稻草裂解纤维;(1) First extract the cracked fiber of rice straw: separate the leaves, stems and ears of the rice straw raw material, discard the leaves and ears, cut the stem into 3-5cm, soak in 5% sodium bicarbonate solution for 24 hours, take out , keep the moisture content 10-15%, and then expand the rod through the expansion equipment to obtain the straw cracked fiber in the form of cotton ball;

(2)改性沥青的制备:(2) Preparation of modified asphalt:

先将360kg水与22kg十二烷基二甲基苄基氯化铵混合后,经过乳化机充分混合形成皂液并加热到65℃;再将皂液与580kg的90#沥青过胶体磨研磨混合得乳化沥青,再将该乳化沥青与加热到40℃的38kg液体氟硅橡胶在混融器内迅速混合,并充分搅拌,得改性沥青;First mix 360kg of water with 22kg of dodecyl dimethyl benzyl ammonium chloride, then thoroughly mix them through an emulsifier to form a soap solution and heat it to 65°C; then grind and mix the soap solution with 580kg of 90# asphalt through a colloid mill To obtain emulsified asphalt, then quickly mix the emulsified asphalt with 38kg of liquid fluorosilicone rubber heated to 40°C in a mixer, and stir thoroughly to obtain modified asphalt;

(3)钻井液用承压堵漏剂的制备(3) Preparation of pressure-bearing plugging agent for drilling fluid

按重量份配比计,取核桃壳粉45份、稻草裂解纤维35份、碳酸钙粉6份、水解聚丙烯腈铵盐2份、速溶硅酸钠4份、硬脂酸铝6份、羧甲基纤维素7份、可再分散乳胶粉7份、改性沥青15份,置于搅拌设备中混合1.5小时,在60℃下恒温烘干、造粒,平均粒径为20-300目,即得钻井液用承压堵漏剂。According to the proportion by weight, take 45 parts of walnut shell powder, 35 parts of rice straw cracked fiber, 6 parts of calcium carbonate powder, 2 parts of hydrolyzed polyacrylonitrile ammonium salt, 4 parts of instant sodium silicate, 6 parts of aluminum stearate, carboxylate 7 parts of methyl cellulose, 7 parts of redispersible latex powder, 15 parts of modified asphalt, mixed in a stirring device for 1.5 hours, dried at a constant temperature of 60°C, and granulated. The average particle size is 20-300 mesh. The pressure-bearing plugging agent for drilling fluid is obtained.

实施例2Example 2

稻草裂解纤维和改性沥青的制备如实施例1。The preparation of rice straw pyrolysis fiber and modified asphalt is as in Example 1.

钻井液用承压堵漏剂的制备Preparation of pressure-bearing plugging agent for drilling fluid

按重量份配比计,取核桃壳粉40份、稻草裂解纤维30份、碳酸钙粉4份、水解聚丙烯腈铵盐1份、速溶硅酸钠4份、硬脂酸铝6份、羧甲基纤维素5份、可再分散乳胶粉5份、改性沥青10份,置于搅拌设备中混合1小时,在60℃下恒温烘干、造粒,平均粒径为20-300目,即得钻井液用承压堵漏剂。According to the proportion by weight, take 40 parts of walnut shell powder, 30 parts of rice straw cracked fiber, 4 parts of calcium carbonate powder, 1 part of hydrolyzed polyacrylonitrile ammonium salt, 4 parts of instant sodium silicate, 6 parts of aluminum stearate, carboxylate 5 parts of methyl cellulose, 5 parts of redispersible latex powder, 10 parts of modified asphalt, mixed in a mixing device for 1 hour, dried at a constant temperature of 60°C, and granulated. The average particle size is 20-300 mesh. The pressure-bearing plugging agent for drilling fluid is obtained.

实施例2Example 2

稻草裂解纤维和改性沥青的制备如实施例1。The preparation of rice straw pyrolysis fiber and modified asphalt is as in Example 1.

钻井液用承压堵漏剂的制备Preparation of pressure-bearing plugging agent for drilling fluid

按重量份配比计,取核桃壳粉50份、稻草裂解纤维40份、碳酸钙粉8份、水解聚丙烯腈铵盐3份、速溶硅酸钠8份、硬脂酸铝12份、羧甲基纤维素10份、可再分散乳胶粉10份、改性沥青20份,置于搅拌设备中混合2小时,在60℃下恒温烘干、造粒,平均粒径为20-300目,即得钻井液用承压堵漏剂。According to the ratio by weight, take 50 parts of walnut shell powder, 40 parts of rice straw cracked fiber, 8 parts of calcium carbonate powder, 3 parts of hydrolyzed polyacrylonitrile ammonium salt, 8 parts of instant sodium silicate, 12 parts of aluminum stearate, carboxylate 10 parts of methyl cellulose, 10 parts of redispersible latex powder, 20 parts of modified asphalt, mixed in a stirring device for 2 hours, dried at a constant temperature of 60°C, and granulated. The average particle size is 20-300 mesh. The pressure-bearing plugging agent for drilling fluid is obtained.

我们对实施例1所制得的承压堵漏剂做了如下测试:We have done the following test to the pressure-bearing leakage plugging agent that embodiment 1 makes:

应用指标和理化指标如下表1:其中标准指标是以Q/72084246-4.2-2010 为标准。Application indicators and physical and chemical indicators are as follows in Table 1: The standard indicators are based on Q/72084246-4.2-2010.

表1应用指标和理化指标表Table 1 Application index and physical and chemical index table

.

将实施例1所制得的承压堵漏剂按企业标准Q/728084264-4-2001进行质量监测和封漏效果及配伍评价实验,测定其在钙土浆重点漏失泥浆量(ml)和封漏时间(s),测试结果如下表2和表3:According to the enterprise standard Q/728084264-4-2001, the pressure-bearing plugging agent prepared in Example 1 was subjected to quality monitoring, leak-sealing effect and compatibility evaluation experiments, and measured the amount of mud lost (ml) and sealing effect in calcium-clay slurry. Leakage time (s), the test results are as follows in Table 2 and Table 3:

表2漏失泥浆量(mL)Table 2 Lost mud volume (mL)

.

表3封漏时间(s)Table 3 Leak sealing time (s)

.

将实施例1所制得的承压堵漏剂分别在多种泥浆体系中进行配伍性试验,配伍实验表如下:The pressure-bearing plugging agent prepared in Example 1 was subjected to compatibility tests in various mud systems, and the compatibility test table is as follows:

表4配伍实验表Table 4 Compatibility Experiment Table

.

表4中的A浆成分包括有钙土浆、PHP、XY-27、铵盐、磺化沥青,B浆成分包括钙上浆、FA367、XY-27、SMP.1、NaHPAN;C浆成分包括钠土浆、CUD、CPF、FRH和硫酸钡。The ingredients of slurry A in Table 4 include calcium soil slurry, PHP, XY-27, ammonium salt, and sulfonated asphalt; the ingredients of slurry B include calcium sizing, FA367, XY-27, SMP.1, and NaHPAN; the ingredients of slurry C include sodium Clay, CUD, CPF, FRH and barium sulfate.

表4中:P:密度,T:漏斗粘度(s),API:滤失量,K:泥饼厚度,PV:塑性粘度,YP:动切力。In Table 4: P: density, T: funnel viscosity (s), API: fluid loss, K: mud cake thickness, PV: plastic viscosity, YP: dynamic shear force.

表4中的数据除漏失泥浆量、封漏时间外均为恒温140℃,养护16小时,50℃下测得。The data in Table 4 are measured at a constant temperature of 140°C, 16 hours of curing, and 50°C, except for the amount of mud lost and the time of sealing the leak.

我们也对实施例2和3所制得的承压堵漏剂做了与实施例1相同的试验,试验结果与实施例1的试验结果并无明显差别,故在此不作敷述。We also did the same test as in Example 1 on the pressure-bearing plugging agents prepared in Examples 2 and 3, and the test results were not significantly different from those in Example 1, so we will not describe them here.

从上述各实施例及试验表中可以看出本暂堵剂是封漏快捷、使用高效、施工方便等特点,集承压、屏蔽暂堵、保护油气层、防漏、堵漏、废物利用为一体的新型油气层暂堵剂材料。能对环境产生较好的改善作用,能迅速、有效封漏微裂缝、空隙性地层的渗透性漏失,可随钻加入泥浆中,不会被振动筛筛出,对地层起到防漏、堵漏的作用。From the above-mentioned embodiments and test tables, it can be seen that this temporary plugging agent has the characteristics of fast leakage sealing, high efficiency in use, and convenient construction. A new type of temporary plugging agent material for oil and gas reservoirs. It can better improve the environment, and can quickly and effectively seal the leakage of micro-cracks and voids in the formation. It can be added to the mud while drilling, and will not be screened out by the vibrating screen. It can prevent leakage and plug the formation. The role of leakage.

其次,本堵漏剂采用维核桃壳粉、稻草裂解纤维以及改性沥青等为主要原材料,因此容易相互交织形成网布,并能在泄漏点的压差下形成多层叠加,与同类产品相比,具有更好的经济效益和实用性,且成本更低。Secondly, this plugging agent uses walnut shell powder, cracked rice straw fiber and modified asphalt as the main raw materials, so it is easy to interweave to form a mesh, and can form multi-layer superposition under the pressure difference at the leakage point, which is comparable to similar products. Compared, it has better economic benefits and practicability, and the cost is lower.

Claims (1)

1.一种钻井液用承压堵漏剂的制备方法,其特征在于,该方法包括以下步骤:1. a preparation method of pressure-bearing plugging agent for drilling fluid, it is characterized in that, the method may further comprise the steps: (1)首先提取稻草裂解纤维:对稻草原料进行叶、杆和穗的分离,弃去叶和穗,将杆切割成3-5cm,用质量浓度为5%碳酸氢钠液浸泡24小时,取出,保持水分含量10-15%,再通过膨化设备对杆进行膨化,得到棉球状的稻草裂解纤维;(1) First extract the cracked fiber of rice straw: separate the leaves, stems and ears of the rice straw raw material, discard the leaves and ears, cut the stems into 3-5cm, soak in 5% sodium bicarbonate solution for 24 hours, take out , keep the moisture content 10-15%, and then expand the rod through the expansion equipment to obtain the straw cracked fiber in the form of cotton ball; (2)按重量份配比计,取核桃壳粉40-50份、稻草裂解纤维30-40份、碳酸钙粉4-8份、水解聚丙烯腈铵盐1-3份、抗渗剂10-20份、羧甲基纤维素5-10份、可再分散乳胶粉5-10份、改性沥青10-20份,置于搅拌设备中混合1-2小时,在60℃下恒温烘干、造粒,平均粒径为20-300目,即得钻井液用承压堵漏剂;所述抗渗剂由速溶硅酸钠和硬脂酸铝按照2:3的质量比混合而成;所述改性沥青由以下制备方法制得:先将360kg水与22kg十二烷基二甲基苄基氯化铵混合后,经过乳化机充分混合形成皂液并加热到45℃~80℃;再将皂液与580kg的90#沥青过胶体磨研磨混合得乳化沥青,再将该乳化沥青与加热到30℃~50℃的38kg液体氟硅橡胶在混融器内迅速混合,并充分搅拌,得改性沥青。(2) According to the ratio of parts by weight, take 40-50 parts of walnut shell powder, 30-40 parts of cracked rice straw fiber, 4-8 parts of calcium carbonate powder, 1-3 parts of hydrolyzed polyacrylonitrile ammonium salt, and 10 parts of impervious agent. -20 parts, 5-10 parts of carboxymethyl cellulose, 5-10 parts of redispersible latex powder, 10-20 parts of modified asphalt, mixed in a stirring device for 1-2 hours, and dried at a constant temperature of 60°C , granulation, with an average particle diameter of 20-300 mesh, to obtain a pressure-bearing plugging agent for drilling fluid; the anti-seepage agent is formed by mixing instant sodium silicate and aluminum stearate in a mass ratio of 2:3; The modified asphalt is prepared by the following preparation method: first mix 360kg of water and 22kg of dodecyldimethylbenzyl ammonium chloride, then fully mix them through an emulsifier to form a soap liquid and heat it to 45°C-80°C; Then grind and mix the soap solution with 580kg of 90# asphalt through a colloid mill to obtain emulsified asphalt, and then quickly mix the emulsified asphalt with 38kg of liquid fluorosilicone rubber heated to 30°C to 50°C in a mixer, and fully stir. modified asphalt.
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