一种致密油气层保护剂的研制与应用  

Development and Application of a Protective Agent for Tight Oil and Gas Reservoirs

作　　者：李昕潼 郑文武 刘福 孙中伟[3] 王松[1] LI Xintong;ZHENG Wenwu;LIU Fu;SUN Zhongwei;WANG Song(Chemical College of Yangtze University,Jingzhou,Hunan 434023;Technical Service Company of Sinopec North China Petroleum Engineering Co.,Ltd.,Zhengzhou,Henan 450006;Institute of Engineering Technology,Henan Oilfield Branch,Sinopec,Nanyang,Henan 473132)

机构地区：[1]长江大学化工学院,湖北荆州434023 [2]中石化华北石油工程有限公司技术服务公司,郑州450006 [3]中石化河南油田分公司工程技术研究院,河南南阳473132

出　　处：《钻井液与完井液》2022年第5期565-572,共8页Drilling Fluid & Completion Fluid

基　　金：国家重大专项“大型油气田及煤层气开发”(2017ZX05023-003-005)。

摘　　要：在新疆本布图油田的勘探开发过程中,时常发生水层及油气层井段井径不规则,严重影响固井质量,损害了油气层。为了钻采过程中满足对本布图油田储层保护的要求,采用无肥皂乳液聚合法合成了聚合物弹性微球NWL,并对其进行了表征,另外优选了防水锁剂。将NWL、防水锁剂、微米级的刚性酸溶性颗粒(CaCO_(3))、石油树脂C_(9)按照一定比例进行复配,得到了储层保护剂CBJ。并评价了CBJ与地层裂缝孔隙适配性、酸溶性与油溶性、与现有钻井液配伍性的评价和储层保护效果,并进行了现场实验。结果表明,CBJ满足地层裂缝孔隙封堵粒径大小的要求,具有良好的酸溶性与油溶性,API滤失量下降了20%左右,渗透率恢复值达80%以上,现场实验效果良好。研究结果表明,CBJ具有良好的储层保护性能,能够因地制宜地保护本布图油田储层,最大限度地提高油井产量。In developing the Benbutu oilfield in Xinjiang,hole size irregularities were often encountered in the water-and hydrocarbon-containing sections,and these greatly affect the quality of the cementing job and damage the reservoirs.To protect the oil and gas reservoirs in the Benbutu oilfield,an elastic polymer microsphere NWL was developed through soap-free emulsion polymerization and was characterized.A reservoir protective agent CBJ was formulated with NWL,a selected anti water-block agent,a kind of rigid acid soluble nanometer particles(CaCO_(3))and a petroleum resin in a certain quantity ratio.Laboratory experiment was conducted to evaluate CBL in the aspects such as:the compatibility of CBL with the sizes of formation fractures,the acid solubility and oil solubility of CBL,the compatibility of CBL with the drilling fluids presently used,and the reservoir protection performance of CBL.CBL was also tested in field operations.CBL has the particle size distribution that is suitable for plugging formation fractures,good acid solubility and oil solubility.Drilling fluids treated with CBL have filtration rate reduced by about 20%,and percent permeability recovery by more than 80%.Field application and laboratory study show that CBL has good reservoir protection effect,it can be used to protect the reservoirs of Benbutu oilfield in accordance with the local conditions and maximize the production of oil wells.

关 键 词：致密油气层 本布图油田 油气层损害 油层保护剂 

分 类 号：TE254.4[石油与天然气工程—油气井工程]