特低渗透油藏CO2混相驱和非混相驱水气交替注采参数优化  

Optimization of water gas alternate injection production parameters for miscible and immiscible CO2 flooding in ultra-low permeability reservoir

作　　者：李敏 关华 胡世勇[2] 王鑫 李齐 袁少民 LI Min;GUAN Hua;HU Shiyong;WANG Xin;LI Qi;YUAN Shaomin(Key Laboratory of Reservoir Physics and Percolation Mechanics of Heilongjiang,College of Earth Sciences,Northeast Petroleum University,Heilongjiang Daqing 163712,China;Southwest Petroleum University,Chengdu 610500,China)

机构地区：[1]大庆油田勘探开发研究院黑龙江省油层物理及渗流力学重点实验室,黑龙江大庆163712 [2]西南石油大学,成都610500

出　　处：《非常规油气》2021年第1期60-66,共7页Unconventional Oil & Gas

基　　金：中国石油股份公司“十三五”重大专项“大庆油气持续有效发展关键技术研究与应用”(2016E-0209)。

摘　　要：以大庆油田贝14区块和树101区块为研究对象,应用油藏数值模拟方法,优化了CO2混相驱和非混相驱水气交替的注采参数。采用经济评价的方法,以经济利润为目标,对CO2水气交替过程中的水气比、注气速度、水气交替时间和水气交替时机4个参数进行了优化研究。结果表明,对于CO2混相驱,气油比达到50 m^3/t时开始水气交替,水气比4:1,注气速度25 m^3/d,交替周期注3个月水注1个月气为最优组合方案;对于CO2非混相驱,气油比达到250 m^3/t时开始水气交替,水气比1:1,注气速度20 m^3/d,交替周期注1个月水注1个月气为最优组合方案。In this paper,the reservoir numerical simulation method is used to optimize the injection production parameters of CO2 miscible flooding and immiscible flooding.By using the method of economic evaluation and taking the economic profit as the goal,the four parameters of water gas ratio,gas injection speed,water gas alternation time and water gas alternation time in the process of CO2 water gas alternation are optimized.The results show that for CO2 miscible flooding,when the gas oil ratio reaches 50 m^3/t,the water gas alternation will start,the water gas ratio is 4:1,the gas injection speed is 25 m^3/d,and the alternative period of three months water injection for one month gas injection is the optimal combination scheme.For CO2 immiscible flooding,when the gas oil ratio reaches 250 m^3/t,the water gas alternation will start,the water gas ratio is 1:1,the gas injection speed is 20 m^3/d,and the alternation period of one month water injection and one month gas injection is the optimal combination scheme.

关 键 词：特低渗透油藏 CO2驱 水气交替 经济评价方法 注采参数 

分 类 号：TE357[石油与天然气工程—油气田开发工程]