清洁聚合物压裂液研究与现场应用
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摘要
清洁聚合物压裂液是目前国内外压裂液研究领域的热点之一。以增稠剂(SRFP-1)、交联剂(SRFC-1)、黏土稳定剂(SRCS-1)和助排剂(SRCU-1)工业品作为研究对象,以现场配液用水配制清洁聚合物(SRFP)压裂液,评价了SRFP清洁聚合物压裂液的变剪切性能、破胶性能及压裂液滤液对岩心的伤害性能;测定了破胶液的表面张力。结果表明:该压裂液在90℃条件下具有良好的耐剪切性能;在60~80℃,破胶剂加入量为0.005%~0.04%条件下,2h即可破胶,破胶液黏度小于5mPa·s,破胶液表面张力小于28mN/m;压裂液滤液对岩心基质伤害率为18.7%;最后将该压裂液成功应用于鄂尔多斯盆地某重点水平井的压裂作业。
Clean polymer fracturing fluid is one of the hot research fields home and abroad.gelling agent(SRFP-1),cross-linker(SRFC-1),clay stabilizer(SRCS-1)and cleanup additive(SRCU-1)were the target objects.Clean polymer fracturing fluid(SRFP)was prepared using the field water.Variable shear performance,viscosity break performance and the effects of fracturing fluid on permeability damage of core were tested.The surface tension of gel breaking liquid was measured.The fracturing fluid showed better shearing resistance performance under the conditions of 90 ℃.Under the conditions of 60~80 ℃,0.005%~0.04% breaker and 2h,the viscosity of the gel breaking liquid was less than 5mPa·s,and the surface tension of the gel breaking liquid was less than 28 mN/m.The permeability damage rate of core matrix caused by SRFP was 18.7%.Finally,the fracturing fluid was successfully used for the fracture of one key horizontal well in Ordos Basin.
Clean polymer fracturing fluid is one of the hot research fields home and abroad.gelling agent(SRFP-1),cross-linker(SRFC-1),clay stabilizer(SRCS-1)and cleanup additive(SRCU-1)were the target objects.Clean polymer fracturing fluid(SRFP)was prepared using the field water.Variable shear performance,viscosity break performance and the effects of fracturing fluid on permeability damage of core were tested.The surface tension of gel breaking liquid was measured.The fracturing fluid showed better shearing resistance performance under the conditions of 90 ℃.Under the conditions of 60~80 ℃,0.005%~0.04% breaker and 2h,the viscosity of the gel breaking liquid was less than 5mPa·s,and the surface tension of the gel breaking liquid was less than 28 mN/m.The permeability damage rate of core matrix caused by SRFP was 18.7%.Finally,the fracturing fluid was successfully used for the fracture of one key horizontal well in Ordos Basin.
引文
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[2]WANG X L,QU Q.Development of a Nonresidue Polymer-Based Fracturing Fluid[C].SPE 80227,2003.
[3]赵辉,戴彩丽,梁利,等.煤层气井用非离子聚丙烯酰胺锆冻胶压裂液优选[J].石油钻探技术,2012,40(1):64-68.
[4]杜涛,姚奕明,蒋廷学,等.新型疏水缔合聚合物压裂液的流变性能研究[J].精细石油化工,2014,31(2):37-40.
[5]杜涛,姚奕明,蒋廷学,等.新型疏水缔合聚合物压裂液综合性能评价[J].精细石油化工,2014,31(3):72-75.
[6]杜涛,姚奕明,蒋廷学,等.新型疏水缔合聚合物压裂液性能研究与现场应用[J].精细石油化工,2015,32(2):20-24.
[7]杜涛,姚奕明,蒋廷学,等.新型疏水缔合聚合物压裂液破胶性能研究[J].化学世界,2014,55(11):664-667.
[8]SY/T 5107-2005,水基压裂液性能评价方法[S].
[9]SY/T 6376-2008,压裂液通用技术条件[S].
[10]张劲,李林地,张士城,等.一种伤害率极低的阴离子型VES压裂液的研制及其应用[J].油田化学,2008,25(2):122-125.