新疆油田JL区块特低渗透油藏CO_(2)-化学剂复合吞吐技术应用研究  

Application of CO_(2)-chemical agent composite huff and puff in extra-low permeability reservoir of Block JL in Xinjiang Oilfield

作　　者：李超[1] 陈祖华[2] 胡世莱 任培罡[1] LI Chao;CHEN Zuhua;HU Shilai;REN Peigang(Science and Technology Development Branch,SINOPEC East China Petroleum Engineering Co.,Ltd.,Nanjing City,Jiangsu Province,210019,China;Exploration and Development Research Institute,SINOPEC East China Branch,Nanjing City,Jiangsu Province,210019,China;Institute of Petroleum and Natural Gas Engineering,Southwest Petroleum University,Chengdu City,Sichuan Province,610500,China)

机构地区：[1]中国石化华东石油工程有限公司科技发展分公司,江苏南京210019 [2]中国石化华东分公司勘探开发研究院,江苏南京210019 [3]西南石油大学石油与天然气工程学院,四川成都610500

出　　处：《油气地质与采收率》2021年第3期134-141,共8页Petroleum Geology and Recovery Efficiency

基　　金：中国石化石油工程技术服务有限公司科技项目“新疆油田金龙井区低渗砂砾岩油藏二元复合吞吐增产技术先导试验”(SG19-42X)。

摘　　要：通过调研中外CO_(2)吞吐项目的应用效果和实践经验,从地质特征、储层特征、流体性质和开发特征的4类9项参数分析了适合CO_(2)吞吐的油藏特征。室内实验表明,新疆油田JL区块注CO_(2)后地层原油膨胀系数增幅明显,地层弹性能量得到较好补充,适合开展CO_(2)吞吐;而表面活性剂CRS-1080可有效降低流体间的界面张力,增强CO_(2)波及体积,提高驱油效率,二者相结合,增强了CO_(2)吞吐效果。结合选井条件和室内实验,优选新疆油田JL区块X1井开展CO_(2)-化学剂复合吞吐先导试验,措施后地层能量得到有效补充,邻井产量递减趋势得到遏制,说明该项技术对本区块具有一定的适用性。By investigating the application effect and practical experience of CO_(2) huff and puff projects,we analyzed the res⁃ervoir characteristics suitable for CO_(2) huff and puff from nine parameters in four categories,namely geological features,res⁃ervoir characteristics,fluid properties,and development characteristics.According to the laboratory experiments,the expan⁃sion coefficient of crude oil in the CO_(2)-injected formation in Block JL exhibits such an evident increase and the elastic en⁃ergy of the formation could be well supplemented,which means the formation is the suitable for CO_(2) huff and puff.Mean⁃while,the surfactant CRS-1080 can effectively reduce the interfacial tension between fluids and increase CO_(2) swept vol⁃ume,thus improving the effect of CO_(2) huff and puff.Combined with well selection conditions and laboratory experiments,Well X1 in Block JL was selected to carry out the pilot test of CO_(2)-chemical composite huff and puff,after which the reser⁃voir energy was effectively supplemented and the production decline trend of near wells was restrained.The test showed that this technology has certain applicability to this block.

关 键 词：特低渗透油藏 复合吞吐 表面活性剂 选井条件 新疆油田 

分 类 号：TE357.45[石油与天然气工程—油气田开发工程]