二氧化碳驱油藏有利沉积相组合研究  

Research on the Favorable Sedimentary Facies Combination in Oil Reservoirs with CO--_2 Flooding

作　　者：钟张起[1] 侯读杰[1] 李跃红[2] 刘鹏程[1] 安丽[2] 

机构地区：[1]中国地质大学,北京100083 [2]中石化中原油田分公司,河南濮阳457001

出　　处：《特种油气藏》2015年第1期115-117,156,共3页Special Oil & Gas Reservoirs

基　　金："十二五"国家科技重大专项"东濮凹陷油气富集规律与增储领域"(2011ZX05006-004-07)

摘　　要：油藏CO2驱时,气体突破时间延长,可提高经济效益。以中原油田某研究区块储层条件为基础,运用数值模拟技术,研究不同沉积相组合储层CO2驱开发效果。数模结果表明,平均渗透率相同的条件下,随着渗透率级差的增加,生产时间逐渐缩短,采收率和气体突破时间逐渐增加,井口产出CO2气体的峰值产量逐渐降低。在水下分流河道侧翼部署注入井和采油井,通过压裂引流,开采水下分流河道沉积砂体的原油,可有效减缓气窜,延长开发时间,提高原油采收率。CO2flooding in oil reservoirs can extend gas breakthrough period and improve economics. Based on a reservoir in Zhongyuan Oilfield,the numerical simulation is performed to analyze the CO2 flooding performance of reservoirs with different sedimentary facies combinations. The simulation results reveal that,given the equal average permeability,the production period decreases,the recovery factor increases,the gas breakthrough period increases and the maximum wellhead CO2 production decreases,with the increase of permeability contrast. Injection and production wells are arranged in the underwater distributary channel flank to produce oil storages in the sedimentary sandbodys of underwater distributary channel through fracturing drainage,which can effectively slow down gas breakthrough,extend production period and enhance oil recovery factor.

关 键 词：CO2驱 油藏开发 沉积相 复合油藏 数值模拟 中原油田 

分 类 号：TE348[石油与天然气工程—油气田开发工程]