苏里格气田致密气藏压裂改造技术研究应用
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摘要
针对苏里格气田致密砂岩气藏压裂改造后产能不理想的问题,分析了低压致密气藏改造的难点,建立了低压致密气藏改造后的产能渗流模型和产能方程,分析了影响改造后产量的关键因素,并对比了两口井不同压裂工艺下的生产效果。结果表明,致密气藏压裂对地层的伤害包括压裂液本身造成的伤害及施工返排工艺造成的伤害,压裂液返排时间对低压气藏伤害影响较大,采用低伤害无残渣清洁压裂液和采用压裂液的快速返排工艺是提高低压致密气藏改造效果的关键。
As the productivity of tight sandstone gas reservoir in Sulige gas field after fracturing is not ideal, the difficulty on the transformation of low-pressure tight gas reservoir was analyzed, the capacity seepage model and capacity equation after transformation were established,the key factors of influencing the production after transformation were analyzed, and the production of two wells under different fracturing effect was compared. The results show that the tight gas reservoir fracturing of formation damage includes the damage caused by fracturing fluid itself and construction flowback technology, and the fracturing fluid flowback time impact on the low-pressure gas reservoir damage is bigger. The fracturing fluid with no residue and clean with low damage, and the quick-flowback technique after fracturing are the keys to improve the effect of lowpressure tight gas transformation.
As the productivity of tight sandstone gas reservoir in Sulige gas field after fracturing is not ideal, the difficulty on the transformation of low-pressure tight gas reservoir was analyzed, the capacity seepage model and capacity equation after transformation were established,the key factors of influencing the production after transformation were analyzed, and the production of two wells under different fracturing effect was compared. The results show that the tight gas reservoir fracturing of formation damage includes the damage caused by fracturing fluid itself and construction flowback technology, and the fracturing fluid flowback time impact on the low-pressure gas reservoir damage is bigger. The fracturing fluid with no residue and clean with low damage, and the quick-flowback technique after fracturing are the keys to improve the effect of lowpressure tight gas transformation.
引文
[1]凌云,李宪文,慕立俊,等.苏里格气田致密砂岩气藏压裂技术新进展[J].天然气工业,2014, 34(11):66-72.
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[5]刘彦学,王宝峰,刘建坤.压裂液对低渗砂岩气藏的水敏性伤害实验研究[J].石油钻探技术,2013, 41(1):70-75.
[6]庄照锋,张士诚,李宗田,等.压裂液伤害程度表示方法探讨[J].油气地质与采收率,2010,17(5):118-111.
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[8]严文德,孙雷,程绪彬,等.低渗透气藏特殊渗流机理的产能评价分析[J].天然气工业,2007, 27(11):76-79.
[9]何勇明,孙尚如,徐荣伍,等.低渗透油藏污染井压裂增产率预测模型及敏感性分析[J].中国石油大学学报(自然科学版),2010, 34(3):75-78.
[10]朱洪林,刘向君,姚光华,等.用数字岩心确定低渗透砂岩水锁临界值[J].天然气工业,2016, 8(12):72-75.
[11]李勇明,赵金洲,郭建春,等.裂缝性低渗透储层压裂液滤失计算新模型[J].石油钻采工艺,2004, 26(5):44-49.
[12] SMITH John E. Design of hydraulic fracture treatment[C]. SPE1268, 1965.
[13] HARRIOGTON L J, WHITSETT N F, HANNAH R R. Prediction of the location and movement of fluid interfaces in a fracture[C]. Presented at the Southwestern Petroleum Short Course, Texas Tech. University, 1973:26-27
[2]马新华,贾爱林,谭健,等.中国致密砂岩气开发工程技术与实践[J].石油勘探与开发,2012, 39(5):572-579.
[3]李克智,何青,秦玉英,等.“井工厂”压裂模式在大牛地气田的应用[J].石油钻采工艺,2013, 35(1):68-71.
[4]杨冠科王成.低浓度羟丙基胍胶压裂液在苏里格气田的应用[J].油田化学,2014, 32(2):73-76.
[5]刘彦学,王宝峰,刘建坤.压裂液对低渗砂岩气藏的水敏性伤害实验研究[J].石油钻探技术,2013, 41(1):70-75.
[6]庄照锋,张士诚,李宗田,等.压裂液伤害程度表示方法探讨[J].油气地质与采收率,2010,17(5):118-111.
[7]李奇,高树生,叶礼友,等.致密砂岩气藏渗流机理及开发技术[J].科学技术与工程,2014, 14(34):79-87.
[8]严文德,孙雷,程绪彬,等.低渗透气藏特殊渗流机理的产能评价分析[J].天然气工业,2007, 27(11):76-79.
[9]何勇明,孙尚如,徐荣伍,等.低渗透油藏污染井压裂增产率预测模型及敏感性分析[J].中国石油大学学报(自然科学版),2010, 34(3):75-78.
[10]朱洪林,刘向君,姚光华,等.用数字岩心确定低渗透砂岩水锁临界值[J].天然气工业,2016, 8(12):72-75.
[11]李勇明,赵金洲,郭建春,等.裂缝性低渗透储层压裂液滤失计算新模型[J].石油钻采工艺,2004, 26(5):44-49.
[12] SMITH John E. Design of hydraulic fracture treatment[C]. SPE1268, 1965.
[13] HARRIOGTON L J, WHITSETT N F, HANNAH R R. Prediction of the location and movement of fluid interfaces in a fracture[C]. Presented at the Southwestern Petroleum Short Course, Texas Tech. University, 1973:26-27