低渗灰岩油藏气水均衡驱替主控参数合理界限及开发效果评价  

Reasonable limits of main controlling parameters for balanced displacement by gas-water injection in low permeability limestone reservoirs and their performance evaluation

作　　者：刘辉[1] 李楠[1] 汪周华[2] 彭树岱 杨思玉[1] 朱光亚[1] 吕洲 王鼐[1] LIU Hui;LI Nan;WANG Zhouhua;PENG Shudai;YANG Siyu;ZHU Guangya;L Zhou;WANG Nai(Research Institute of Petroleum Exploration&Development,PetroChina,Beijing 100083,China;State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Southwest Petroleum University,Chengdu 610500,China)

机构地区：[1]中国石油勘探开发研究院,北京100083 [2]西南石油大学油气藏地质及开发工程国家重点实验室,四川成都610500

出　　处：《中国石油大学学报（自然科学版）》2024年第5期115-121,共7页Journal of China University of Petroleum(Edition of Natural Science)

基　　金：中国石油重大科技专项(2023ZZ19)。

摘　　要：为制定中东低渗生屑灰岩油藏注气注水均衡驱替合理开发技术政策,设计开发因素正交试验模拟,运用组分模型数模技术,并通过二元次模型创建开发主控参数正交图版,明确气水协同注入均衡驱替的主控参数界限;在此基础上,构建基于数模预测的开发动态模糊综合评价体系,定量表征油井生产差异性,评价开发效果,指导矿场先导试验区优选。结果表明:注气注水开发主控参数对采出程度的影响由大到小排序为注气速度、注入时机、采油速度、井距、注水速度;实现油气油水前缘均衡驱替的合理采油速度为2.0%,注气速度为(34~45)×10^(4)m^(3)/d,注水速度为240~320 m^(3)/d,注采井距700 m,地层压力保持原始地层压力水平85%;指导优选开发等级区,实施注水注气矿场先导试验,取得较好试验效果。In order to formulate reasonable technical guidelines for balanced displacement by gas-water injection in low permeability bioclastic limestone reservoirs in the Middle East region,an orthogonal simulation testing program of the operation parameters was designed,and a numerical modeling technique was applied to create a technical chart of the main controlling parameters to specify their reasonable limits.A dynamic fuzzy comprehensive evaluation system based on the simulation model was constructed to quantitatively characterize the difference of oil well production,evaluate production performance,and provide guidelines for field pilot testing.The results show that the descending sequence of the main control parameters influencing on a ratio of total oil produced to OOIP is as follows:gas injection rate,injection timing,oil production rate,well spacing and water injection rate.The recommended reasonable oil production rate is about 2.0%,with gas injection rate of(34-45)×10^(4)m^(3)/d,water injection rate of 240-320 m^(3)/d,well spacing of 700 m and the injection timing is to maintain current reservoir pressure above 85%.of the original formation pressure.The pilot testing of gas-water synergy injection should be carried out as the priority for the development area.A good field performance of the pilot test based on the new guidelines has been obtained.

关 键 词：低渗 生屑灰岩油藏 气水协同注入 均衡驱替 主控参数 模糊综合评价 

分 类 号：TE341[石油与天然气工程—油气田开发工程]