延长油田CO_(2)驱扩大波及体积矿场实践  

Field test for improving swept volume by CO_(2)flooding in Yanchang Oilfield

作　　者：姚振杰 李剑 陈芳萍 刘凯 刘芳娜 黎保廷 YAO Zhenjie;LI Jian;CHEN Fangping;LIU Kai;LIU Fangna;LI Baoting(Research Institute of Shaanxi Yanchang Petroleum(Group)Co.,Ltd.,Xi’an 710075,Shaanxi,China;Shaanxi Key Laboratory of CO_(2)Sequestration and Enhanced Oil Recovery,Xi’an 710065,Shaanxi,China)

机构地区：[1]陕西延长石油(集团)有限责任公司研究院,陕西西安710065 [2]陕西省二氧化碳封存与提高采收率重点实验室,陕西西安710065

出　　处：《石油地质与工程》2024年第5期84-88,共5页Petroleum Geology and Engineering

基　　金：国家重点研发计划项目“二氧化碳提高油藏采收率与地质封存一体化关键技术及应用示范”(2022YFE0206700);延长石油集团公司级项目“白豹油区致密油藏水平井注CO_(2)强化溶解气驱动用基质原油机理研究”(ycsy2022jcts-B-47);延长石油集团公司级项目“注CO_(2)对砂岩储层微纳米孔隙作用机制及其原油动用机理研究”(ycsy2023ky-B-31);延长石油集团公司级项目“化子坪低渗透油藏CO_(2)驱见气规律及治理对策研究”(ycsy2023ky-B-41)联合资助。

摘　　要：J区块经历多年注水开发,油井增产效果变差,仅砂体展布方向的油井受效。为了改善J区块开发效果,积极探索特低渗透油藏开发方式,通过开展CO_(2)驱先导试验研究CO_(2)驱波及体积,采用水气交替的注入方式抑制CO_(2)沿着优势通道的快速渗流。矿场实践表明,实施水气交替注入后,J区块除砂体展布方向外,其他方向的油井也开始展现出增产效果,特别是后续水段塞注入后,4#油井的月产油量从64 t升至102 t,标志着水气交替注入扩大了波及体积,取得了较好的开发效果。该研究为类似油藏提高采收率提供借鉴。After many years with water injection development in block J,the effect of oil well stimulation becomes worse,and only the oil wells in the direction of sand body distribution is effective.In order to improve the development effect,the development method of ultra-low permeability reservoir is explored,and the CO_(2)flooding swept volume is studied through its pilot test,and the rapid seepage along the advantageous channel is inhibited by the alternate injection of water and gas.Field practice shows that after the implementation of alternating water and gas injection,the wells in block J in other directions besides the direction of sand body distribution also began to show the effect of increasing production.Especially after the subsequent water plug injection,the monthly oil production of the 4#oil well increased from 64 t to 102 t,indicating that the alternating water and gas injection expanded the affected volume and achieved good development results.This study provides a good reference for improving oil recovery in similar reservoirs.

关 键 词：延长油田 特低渗透 CO_(2)驱 波及体积 矿场实践 

分 类 号：TE319[石油与天然气工程—油气田开发工程]