生物酶破胶压裂液破胶速度控制方法研究
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摘要
针对压裂液采用生物酶破胶时存在的破胶速度快的问题,以羟丙基瓜胶冻胶压裂液为研究对象,通过压裂液成胶及破胶特性测定实验,优化了生物酶的浓度,筛选了生物酶反应的金属离子抑制剂类型,并优化了抑制剂浓度。研究表明,生物酶的最佳浓度为0.01%,抑制生物酶破胶速度的最佳离子为锰离子,浓度为0.5%~1.0%,对应的破胶时间为4~8 h,可以选择不同的生物酶浓度和抑制剂浓度来满足现场施工对压裂液破胶速度的要求。
Taking hydroxypropyl guar gum gel fracturing fluid as the research object, aiming at the problem of fast breaking speed of fracturing fluid by biological enzyme,the concentration of biological enzyme was optimized, the types of metal ion inhibitors for biological enzyme reactions were screened and its inhibitor concentration was optimized through the test on gelling and breaking characteristics of fracturing fluid. The research shows that the optimum concentration of enzyme is 0.01%, and the best ion for inhibiting the breaking speed of biological enzyme is manganese ion, its concentration is 0.5%~1.0%, and its corresponding breaking time is 4~8 h. Different biological enzyme concentration and inhibitor concentration can be chosen to meet the requirements of fracturing fluid gel breaking speed of field construction.
Taking hydroxypropyl guar gum gel fracturing fluid as the research object, aiming at the problem of fast breaking speed of fracturing fluid by biological enzyme,the concentration of biological enzyme was optimized, the types of metal ion inhibitors for biological enzyme reactions were screened and its inhibitor concentration was optimized through the test on gelling and breaking characteristics of fracturing fluid. The research shows that the optimum concentration of enzyme is 0.01%, and the best ion for inhibiting the breaking speed of biological enzyme is manganese ion, its concentration is 0.5%~1.0%, and its corresponding breaking time is 4~8 h. Different biological enzyme concentration and inhibitor concentration can be chosen to meet the requirements of fracturing fluid gel breaking speed of field construction.
引文
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[10]党建锋,龚万兴,张宁县,谌勇,蒋玉双.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,2010,03:245-249.
[11]陈英,王亚南,陈绍宁,陈琛,杨平,梅晓丹.用于压裂液的生物酶破胶剂性能评价[J].钻井液与完井液,2010,06:68-71+101.
[12]管保山,刘静,周晓群,等.长庆油气田压裂用生物酶破胶技术及其应用[J].油田化学,2008,25(2):126-129.
[13]张叔军.三种生物降解酶催化机理的理论研究[D].济南:山东大学,2016.
[2]张春辉.低渗透油田压裂液返排规律研究[D].大庆:大庆石油学院,2008.
[3]贺承祖,华明琪.压裂液对储层伤害及其抑制方法[J].钻井液与完井液,2003,20(1):49-53.
[4]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.
[5]尹光伟,张世林,王林,等.可回收胍胶压裂液用缓释酸破胶剂的研制[J].石油化工应用,2014,33(9):108-111.
[6]赵怡.生物酶用于压裂液破胶的可行性研究[D].西安:西安石油大学,2012.
[7]李学军,李玉春,赵忠山.油井大规模压裂对脱水系统的影响及对策[J].油气田地面工程,2014,34(12):6-7.
[8]张芳.BREAK生物酶破胶技术研究及应用[D].西安:西安石油大学,2013.
[9]李静武.论述生物酶破胶剂在压裂中的作用[J].价值工程,2010,06:46-47.
[10]党建锋,龚万兴,张宁县,谌勇,蒋玉双.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,2010,03:245-249.
[11]陈英,王亚南,陈绍宁,陈琛,杨平,梅晓丹.用于压裂液的生物酶破胶剂性能评价[J].钻井液与完井液,2010,06:68-71+101.
[12]管保山,刘静,周晓群,等.长庆油气田压裂用生物酶破胶技术及其应用[J].油田化学,2008,25(2):126-129.
[13]张叔军.三种生物降解酶催化机理的理论研究[D].济南:山东大学,2016.