基于物质平衡的超深断溶体油藏弹性驱产能主控因素分析  

Analysis of main controlling factors for elastic flooding productivity of ultra-deep fault-karst reservoirs based on material balance

作　　者：顾浩[1] 康志江[1] 尚根华[1] 郑松青[1] 朱桂良[1] 张云[2] 朱现胜 朱莲花[2] GU Hao;KANG Zhijiang;SHANG Genhua;ZHENG Songqing;ZHU Guiliang;ZHANG Yun;ZHU Xiansheng;ZHU Lianhua(Petroleum Exploration and Production Research Institute,SINOPEC,Beijing City,100083,China;Norstwest Oilfield Company,SINOPEC,Urumqi,Xinjiang,830011,China)

机构地区：[1]中国石化石油勘探开发研究院,北京100083 [2]中国石化西北油田分公司,新疆乌鲁木齐830011

出　　处：《油气地质与采收率》2021年第4期86-92,共7页Petroleum Geology and Recovery Efficiency

基　　金：国家自然科学基金企业联合基金“海相深层油气富集机理与关键工程技术基础研究(U19B6003)”;中国石化科技部项目“断溶体油藏产能变化规律及优化”(P19026-3)和“顺北断溶体油藏建模数模与开发方式研究”(P20064-3)。

摘　　要：以塔里木盆地Q单元为例,基于物质平衡原理,从储量、能量、流度3大方面分析超深断溶体油藏弹性驱产能主控因素,解释不同断裂级次弹性驱产能差异。结果表明:超深断溶体油藏弹性驱产能主控因素包括缝洞储集体规模、地层弹性能量和流体流动能力,这3个因素整体均呈主干断裂大于分支断裂、分支断裂大于次级断裂的特征;弹性驱单井累积产油量、日产油量、阶段累积产油量均与单井控制储量呈强线性关系;单井累积产油量和单井控制储量与初始地层压力乘积在对数坐标上是一条斜率近似为1的直线;综合弹性压缩系数、缝洞储集体规模对累积产油量影响大于初始地层压力影响;流体流动能力越强,平均单井日产油量越高;要提高超深断溶体油藏弹性驱产能,早期井位部署应优选规模大、地层破碎程度高的缝洞储集体,开发中后期要尽量提高单井控制储量。With the Q Oilfield in the Tarim Basin as an example,according to the principle of material balance,the main controlling factors behind elastic flooding productivity of ultra-deep fault-karst reservoirs are analyzed from the reserves,energy,fluidity 3 aspects to explain the difference in elastic flooding productivity at different fault orders.The results show that the main controlling factors include the scale of fracture-cavity reservoirs,elastic energy of formations and flow capaci⁃ty of fluids.These three factors,on the whole,all play a greater role at the main fault than at the branch fault and contribute more at the branch fault than at the secondary fault.There is a strong linear relationship of single-well controlled reserves with cumulative oil production,daily oil production,and staged cumulative oil production of a single well by elastic flood⁃ing.The products of initial formation pressure with the cumulative oil production and controlled reserves of a single well manifest as a straight line with a slope of approximately 1 on the logarithmic coordinate.The comprehensive elastic com⁃pressibility coefficient and the fracture-cavity reservoir scale have a greater influence on cumulative oil production than ini⁃tial formation pressure.The stronger fluid flow capacity indicates the higher average daily oil production per well.For the greater elastic flooding productivity of ultra-deep fault-karst reservoirs,the fracture-cavity reservoirs with a large scale and a high level of formation breakage should be preferred in the early deployment of well locations,and single-well con⁃trolled reserves should be maximized in the middle and late stages of development.

关 键 词：断溶体油藏 弹性驱 产能 物质平衡原理 单井控制储量 综合弹性压缩系数 

分 类 号：TE344[石油与天然气工程—油气田开发工程]