江苏油田水力压裂裂缝导流能力提高方法实验研究
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摘要
裂缝导流能力是影响水力压裂改造效果的重要因素。目前,胍胶压裂液得到广泛应用,但其中含有的水不溶物以及破胶后形成的残渣会对裂缝导流能力造成一定伤害,从而降低压后增产效果。本文针对江苏油田压裂现状,研究了胍胶压裂液对裂缝导流能力的伤害程度,分析了压裂液对裂缝伤害的机理,提出了裂缝导流能力的提高方法。研究表明稠化剂浓度、支撑剂铺置方式的优化以及羧甲基胍胶压裂液、生物酶破胶剂的应用,可以有效降低胍胶压裂液对裂缝导流能力的伤害。研究结果对压裂液的优选、压裂设计方案的优化具有指导意义。
The propped fracture conductivity is an important factor to influence the effect of fracturing. Now, gel fracturing fluid is widely used, but the water-insoluble solid and the residue after gel-breaking can cause damage to the fracture conductivity, which will reduce the stimulation effect. In this paper, according to the current situation of fracturing in Jiangsu oilfield, the damage degree and mechanism of gel fracturing fluid to conductivity are studied,besides, the methods to improve the propped fracture conductivity are researched. The research indicates that the optimized concentration of gel fracturing fluid and filling mode of fracturing proppant, the application of CMG fracturing fluid and enzyme breaker can reduce the damage of the gel fracturing fluid to the fracture conductivity. According to the results,the optimization of fracturing fluid, the design of fracturing solution can be guided.
The propped fracture conductivity is an important factor to influence the effect of fracturing. Now, gel fracturing fluid is widely used, but the water-insoluble solid and the residue after gel-breaking can cause damage to the fracture conductivity, which will reduce the stimulation effect. In this paper, according to the current situation of fracturing in Jiangsu oilfield, the damage degree and mechanism of gel fracturing fluid to conductivity are studied,besides, the methods to improve the propped fracture conductivity are researched. The research indicates that the optimized concentration of gel fracturing fluid and filling mode of fracturing proppant, the application of CMG fracturing fluid and enzyme breaker can reduce the damage of the gel fracturing fluid to the fracture conductivity. According to the results,the optimization of fracturing fluid, the design of fracturing solution can be guided.
引文
[1]齐生芝.低浓度胍胶压裂液对裂缝导流能力伤害对比实验研究[J].石油化工应用,2014,33(1):107-110..
[2]熊俊杰,周际永,郭大立,等.支撑剂嵌入对裂缝导流能力的影响[J].重庆科技学院学报(自然科学版),2016,18(3):60-62.
[3]张毅,马兴芹,靳保军.压裂支撑剂长期导流能力试验[J].石油钻采工艺,2004,(1):59-61+84.
[4]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.
[5]曲占庆,黄德胜,杨阳,等.气藏压裂裂缝导流能力影响因素实验研究[J].断块油气田,2014,21(3):390-393.
[6]黄禹忠,何红梅,孙光权.压裂支撑剂导流能力影响因素新研究[J].天然气技术与经济,2012,6(5):59-61+80.
[7]刘平礼,张璐,等.瓜胶压裂液对储层的伤害特性[J].油田化学,2014,31(3):334-338.
[8]王中学,秦升益,张士诚.压裂液残渣对不同支撑剂导流能力的影响[J].钻采工艺,2017,40(1):56-60+80.
[9]倪小明,于芸芸,曹运兴.HPG破胶液影响下支撑剂导流能力变化特征研究[J].煤炭科学技术,2016,44(3):86-90.
[10]张华丽,周继东,杲春,等.胍胶压裂液伤害性研究[J].科学技术与工程,2013,13(23):6866-6871.
[11]党建锋,龚万兴,张宁县,等.红台低压气藏用压裂液生物酶破胶剂的性能与现场试验[J].油田化学,2010,27(3):245-249.
[12]陈英,王亚南,陈绍宁,等.用于压裂液的生物酶破胶剂性能评价[J].钻井液与完井液,2010,27(6):68-71+101.
[13] DeVine C S,Tjorr,Joe Pin,et al.Relationship between polymeric fragment damage and damage removal and the original rock and proppant pack permeability[J].SPE 52128,1999.
[14]刘向军.高速通道压裂工艺在低渗透油藏的应用[J].油气地质与采收率,2015,22(2):122-126.
[2]熊俊杰,周际永,郭大立,等.支撑剂嵌入对裂缝导流能力的影响[J].重庆科技学院学报(自然科学版),2016,18(3):60-62.
[3]张毅,马兴芹,靳保军.压裂支撑剂长期导流能力试验[J].石油钻采工艺,2004,(1):59-61+84.
[4]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.
[5]曲占庆,黄德胜,杨阳,等.气藏压裂裂缝导流能力影响因素实验研究[J].断块油气田,2014,21(3):390-393.
[6]黄禹忠,何红梅,孙光权.压裂支撑剂导流能力影响因素新研究[J].天然气技术与经济,2012,6(5):59-61+80.
[7]刘平礼,张璐,等.瓜胶压裂液对储层的伤害特性[J].油田化学,2014,31(3):334-338.
[8]王中学,秦升益,张士诚.压裂液残渣对不同支撑剂导流能力的影响[J].钻采工艺,2017,40(1):56-60+80.
[9]倪小明,于芸芸,曹运兴.HPG破胶液影响下支撑剂导流能力变化特征研究[J].煤炭科学技术,2016,44(3):86-90.
[10]张华丽,周继东,杲春,等.胍胶压裂液伤害性研究[J].科学技术与工程,2013,13(23):6866-6871.
[11]党建锋,龚万兴,张宁县,等.红台低压气藏用压裂液生物酶破胶剂的性能与现场试验[J].油田化学,2010,27(3):245-249.
[12]陈英,王亚南,陈绍宁,等.用于压裂液的生物酶破胶剂性能评价[J].钻井液与完井液,2010,27(6):68-71+101.
[13] DeVine C S,Tjorr,Joe Pin,et al.Relationship between polymeric fragment damage and damage removal and the original rock and proppant pack permeability[J].SPE 52128,1999.
[14]刘向军.高速通道压裂工艺在低渗透油藏的应用[J].油气地质与采收率,2015,22(2):122-126.