特低渗储层CO_(2)水气交替驱动用规律研究  

Study on the law of CO_(2)-water alternate flooding in ultra-low permeability reservoir

作　　者：于晨晓 夏志增 任伟伟 孙伟琦 殷晨晖 YU Chenxiao;XIA Zhizeng;REN Weiwei;SUN Weiqi;YIN Chenhui(Shandong Institute of Petroleum and Chemical Technology,Dongying Shandong 257061,China;Dongsheng Group Co.,Ltd.,SINOPEC Shengli Oilfield,Dongying Shandong 257000,China)

机构地区：[1]山东石油化工学院,山东东营257061 [2]中国石化胜利油田东胜集团股份公司,山东东营257000

出　　处：《石油化工应用》2023年第2期37-41,共5页Petrochemical Industry Application

基　　金：山东石油化工学院大学生创新创业训练计划项目资助,项目编号:2022086。

摘　　要：特低渗储层物性差,注水开发效果不理想。为研究CO_(2)水气交替驱在DC区块的效果,选取典型井油样开展了CO_(2)膨胀实验,建立了五点井网CO_(2)水气交替驱的数值模拟模型,研究了生产动态规律。结果表明:(1)CO_(2)水气交替驱能够维持较长时期的稳产,日产油水平和采出程度显著高于水驱,明显改善特低渗储层的开采效果;(2)CO_(2)水气交替驱能够较好地补充地层能量,驱替效果更好;(3)较早的注入时机、水和CO_(2)比为1∶1、交替周期8个月时,CO_(2)水气交替驱能够取得较好的开发效果。研究得到的认识对改善DC区块的开采效果具有指导意义。The production performance of the ultra-low permeability reservoir by water flood-ing is not quite satisfactory because of poor reservoir properties.In order to study the effect of CO_(2)-WAG in block DC,typical well oil samples were used to carry out CO_(2)swelling experiments,and a five-point well pattern numerical simulation model of CO_(2)-WAG flooding was established and the production characteristics were analyzed.The results showed,(1)CO_(2)-WAG flooding could maintain stable production for a long period of time,and the oil rate level and oil recovery degree were significantly higher than those of water flooding.Obviously improve the exploitation effect of ultra-low permeability reservoir.(2)CO_(2)-WAG flooding could supplement reservoir energy better,and the displacement effect was better compared with water flooding.(3)Under the operating parameters of early flooding timing,1∶1 water-CO_(2)ratio and 8-month alternating cycle,the implement of CO_(2)-WAG flooding in DC block could achieve good production performance.The results obtained from the research can provide guidance for improving the development effect of the DC block.

关 键 词：特低渗油藏 CO_(2) 水气交替 影响因素 

分 类 号：TE357.45[石油与天然气工程—油气田开发工程]