助破胶胶囊型压裂屏蔽暂堵保护剂的制备与性能评价
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摘要
为降低压裂过程中压裂液滤失侵入储层、破胶后的固相残渣等给储层带来的伤害,基于屏蔽暂堵油气层保护理论,结合微胶囊破胶剂的特点,以有机酸为芯材、乙基纤维素为囊材、聚乙烯吡咯烷酮为致孔剂、聚乙烯醇为保护剂,采用液中干燥法制备了助破胶胶囊型压裂屏蔽暂堵保护剂TD-1,优选了制备工艺条件,评价了TD-1的性能。结果表明,在聚乙烯醇加量2.0%、乙基纤维素与聚乙烯吡咯烷酮加量4.0%、搅拌速率为500 r/min的条件下制得的TD-1主要粒径约为300μm,包覆芯材有机酸的含量为34.1%,释放率为69.0%。TD-1有助于压裂液的破胶,可使压裂液破胶液黏度降低35.6%,固相残渣含量降低44.9%,并对压裂液黏度与破胶时间的影响较小。TD-1可在储层表面形成暂堵带,降低压裂液滤液、固相物质侵入储层造成伤害,提高渗透率恢复率11.32%,使岩心渗透率恢复率达82.47%,具有良好的屏蔽暂堵保护油气层的作用。图5表2参24
In order to reduce the damage to the reservoir caused by the leakage of fracturing fluid and the solid phase residue after breaking the gel,based on the shielding temporary plugging oil and gas layer protection theory and the characteristics of microcapsule breaker,the helper-breaking capsule type shielding temporary plugging protection agent in fracturing named TD-1 was prepared by liquid drying method,which used organic acid as the core material,ethyl cellulose as the capsule material,polyethylene pyrrolidone as the porogen,and polyvinyl alcohol as the protective agent. The preparation condition was optimized and the performance of TD-1 was evaluated. The results showed that the main particle size of TD-1 was about 300 μm,the content of organic acid in coated core material was 34.1%,and the release rate was 69.0%,when TD-1 was synthesized under the condition of 2.0% polyvinyl alcohol,4.0% ethyl cellulose and polyvinyl pyrrolidone,and 500 r/min stirring rate. TD-1 was helpful for gel breaking of fracturing fluid,which could reduce the viscosity of fracturing fluid by 35.6% and the solid residue content by 44.9%.Meanwhile TD-1 had little effect on the viscosity of fracturing fluid and gel breaking time. TD-1 could form a temporary plugging zone on the surface of reservoir,which could reduce the invasion damage caused by the fracturing fluid filtrate and solid phase material. TD-1 improved the permeability recovery rate by 11.32% and made the core permeability recovery rate reached 82.47%,showing good effect on temporary shield plugging reservoir.
In order to reduce the damage to the reservoir caused by the leakage of fracturing fluid and the solid phase residue after breaking the gel,based on the shielding temporary plugging oil and gas layer protection theory and the characteristics of microcapsule breaker,the helper-breaking capsule type shielding temporary plugging protection agent in fracturing named TD-1 was prepared by liquid drying method,which used organic acid as the core material,ethyl cellulose as the capsule material,polyethylene pyrrolidone as the porogen,and polyvinyl alcohol as the protective agent. The preparation condition was optimized and the performance of TD-1 was evaluated. The results showed that the main particle size of TD-1 was about 300 μm,the content of organic acid in coated core material was 34.1%,and the release rate was 69.0%,when TD-1 was synthesized under the condition of 2.0% polyvinyl alcohol,4.0% ethyl cellulose and polyvinyl pyrrolidone,and 500 r/min stirring rate. TD-1 was helpful for gel breaking of fracturing fluid,which could reduce the viscosity of fracturing fluid by 35.6% and the solid residue content by 44.9%.Meanwhile TD-1 had little effect on the viscosity of fracturing fluid and gel breaking time. TD-1 could form a temporary plugging zone on the surface of reservoir,which could reduce the invasion damage caused by the fracturing fluid filtrate and solid phase material. TD-1 improved the permeability recovery rate by 11.32% and made the core permeability recovery rate reached 82.47%,showing good effect on temporary shield plugging reservoir.
引文
[1]尹建,郭建春,曾凡辉.低渗透薄互层压裂技术研究及应用[J].天然气与石油,2012,30(6):52-54.
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[4]卢拥军.压裂液对储层的损害及其保护技术[J].钻井液与完井液,1995,12(5):36-43.
[5]刘鹏,徐刚,陈毅,等.渤海低渗透储层水平井分段压裂实践与认识[J].天然气与石油,2018,36(4):58-63.
[6]马喜平,陈尚兵.胍胶类交联压裂液及胶囊破胶剂的新进展[J].钻采工艺,1997,20(5):63-67.
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[9]陈挺,周勋,党伟,等. MCB系列微胶囊破胶剂的性能[J].钻井液与完井液,2016,33(4):114-116.
[10]杜宝中,任锰钢,宣雨.微胶囊缓释破胶剂MEB-1的制备及性能[J].油田化学,2009,26(2):142-144.
[11] CAVANAGH P,JOHNSON C,ROY-DELAGE S L,et al.Self-healing cement-novel technology to achieve leak-free wells[C].//SPE Iadc Drilling Conference. Amsterdam,Netherlands,2007:1-3.
[12]唐洪彪,王世彬,郭建春. pH值对羟丙基胍胶压裂液性能的影响[J].油田化学,2016,33(2):220-223.
[13]崔伟香,王春鹏.压裂用胶囊破胶剂在高压液体中的释放研究[J].油田化学,2016,33(4):619-622.
[14]郭建春,何春明.压裂液破胶过程伤害微观机理[J].石油学报,2012,33(6):1018-1022.
[15]马如然,刘音,常青.油田压裂用暂堵剂技术[J].天然气与石油,2013,31(6):79-82.
[16]赵明伟,高志宾,戴彩丽,等.油田转向压裂用暂堵剂研究进展[J].油田化学,2018,35(3):538-544.
[17]蒋官澄,毛蕴才,周宝义,等.暂堵型保护油气层钻井液技术研究进展与发展趋势[J].钻井液与完井液,2018,35(2):1-16.
[18]吕军,许绍营,危常兵,等.广谱屏蔽暂堵技术在大港油田的应用[J].钻采工艺,2004,27(5):26-29.
[19]高峰,杨洪,王文英.裂缝性油藏屏蔽暂堵方法[J].钻井液与完井液,1998,15(2):15-16.
[20]许燕侠,赵亮,刘挺,等.微胶囊的制备技术[J].上海化工,2005,30(3):21-24.
[21]刘晓庚,谢亚桐.微胶囊制备方法的比较[J].粮食与食品工业,2005,12(1):28-31.
[22]何显儒,韩超,王煦,等.胶囊破胶剂的介质分散分相法制备研究[J].西南石油大学学报(自然科学版),2010,32(1):130-134.
[23]刘彦良,慕卫,刘峰,等.分散、乳化条件及成囊工艺对二甲戊灵微胶囊形成状态的影响[J].农药学学报,2006,8(2):152-156.
[24] ANDRé-ABRANT A,TAVERDET J L,JAY J. Microencapsulation parévaporation de solvant[J]. Eur Polym J,2001,37(5):955-963.
[2]王玉春,岳建平,高庆鸽,等.绥靖油田油井压裂返排液处理技术研究[J].科学技术与工程,2011,11(13):2920-2924.
[3]丁云宏.难动用储量开发压裂酸化技术[M].北京:石油工业出版社,2005:90-102.
[4]卢拥军.压裂液对储层的损害及其保护技术[J].钻井液与完井液,1995,12(5):36-43.
[5]刘鹏,徐刚,陈毅,等.渤海低渗透储层水平井分段压裂实践与认识[J].天然气与石油,2018,36(4):58-63.
[6]马喜平,陈尚兵.胍胶类交联压裂液及胶囊破胶剂的新进展[J].钻采工艺,1997,20(5):63-67.
[7]易绍金,佘跃惠.石油与环境微生物技术[M].北京:中国地质大学出版社,2002:55-101.
[8] YANG Jiang,CUI Weixiang,LU Yongjun,et al. Instant gel formation of viscoelastic surfactant fracturing fluids by diluting through lamellar liquid crystal[J]. J Pet Sci Eng,2015,125(1):90-94.
[9]陈挺,周勋,党伟,等. MCB系列微胶囊破胶剂的性能[J].钻井液与完井液,2016,33(4):114-116.
[10]杜宝中,任锰钢,宣雨.微胶囊缓释破胶剂MEB-1的制备及性能[J].油田化学,2009,26(2):142-144.
[11] CAVANAGH P,JOHNSON C,ROY-DELAGE S L,et al.Self-healing cement-novel technology to achieve leak-free wells[C].//SPE Iadc Drilling Conference. Amsterdam,Netherlands,2007:1-3.
[12]唐洪彪,王世彬,郭建春. pH值对羟丙基胍胶压裂液性能的影响[J].油田化学,2016,33(2):220-223.
[13]崔伟香,王春鹏.压裂用胶囊破胶剂在高压液体中的释放研究[J].油田化学,2016,33(4):619-622.
[14]郭建春,何春明.压裂液破胶过程伤害微观机理[J].石油学报,2012,33(6):1018-1022.
[15]马如然,刘音,常青.油田压裂用暂堵剂技术[J].天然气与石油,2013,31(6):79-82.
[16]赵明伟,高志宾,戴彩丽,等.油田转向压裂用暂堵剂研究进展[J].油田化学,2018,35(3):538-544.
[17]蒋官澄,毛蕴才,周宝义,等.暂堵型保护油气层钻井液技术研究进展与发展趋势[J].钻井液与完井液,2018,35(2):1-16.
[18]吕军,许绍营,危常兵,等.广谱屏蔽暂堵技术在大港油田的应用[J].钻采工艺,2004,27(5):26-29.
[19]高峰,杨洪,王文英.裂缝性油藏屏蔽暂堵方法[J].钻井液与完井液,1998,15(2):15-16.
[20]许燕侠,赵亮,刘挺,等.微胶囊的制备技术[J].上海化工,2005,30(3):21-24.
[21]刘晓庚,谢亚桐.微胶囊制备方法的比较[J].粮食与食品工业,2005,12(1):28-31.
[22]何显儒,韩超,王煦,等.胶囊破胶剂的介质分散分相法制备研究[J].西南石油大学学报(自然科学版),2010,32(1):130-134.
[23]刘彦良,慕卫,刘峰,等.分散、乳化条件及成囊工艺对二甲戊灵微胶囊形成状态的影响[J].农药学学报,2006,8(2):152-156.
[24] ANDRé-ABRANT A,TAVERDET J L,JAY J. Microencapsulation parévaporation de solvant[J]. Eur Polym J,2001,37(5):955-963.