二氧化碳驱油及封存过程中的地质安全界限体系  

Geological Safety Margins During CO_2 Flooding and Sealing

作　　者：李志鹏[1] 卜丽侠[1] Li Zhipeng Bu Lixia(SINOPEC Shengli Oilfield Company, Dongying, Shandong 257015, China)

机构地区：[1]中国石化胜利油田分公司,山东东营257015

出　　处：《特种油气藏》2017年第2期141-144,共4页Special Oil & Gas Reservoirs

基　　金："十二五"国家科技支撑计划"大规模燃煤电厂烟气CO_2捕集;驱油及封存技术开发及应用示范"(2012BAC24B03)

摘　　要：针对CO_2驱油及封存过程中的地质安全问题,利用油气封盖理论和油藏工程理论,研究了油藏条件下CO_2驱油及封存的定量地质安全界限体系。研究结果表明:CO_2驱油及封存过程可划分为CO_2注入驱油阶段、CO_2注入封存阶段和CO_2静态封存阶段;CO_2在油藏条件下存在扩散泄漏、低速渗流泄漏和高速渗流泄漏3种泄漏机理;CO_2的地质安全性主要受盖层岩封堵压力、断层岩封堵压力、断层重开启压力、断层岩破裂压力及盖层破裂压力等的控制。研究成果对CO_2驱油及封存项目的选址及风险分析有重要意义。With regard to geological safety concerns during CO2 flooding and sealing, theories related to hydrocar- bon sealing and reservoir engineering have been used to highlight quantitative geological safety margin system for CO2 flooding and sealing under reservoir conditions. Research results show ： CO2 flooding and sealing processes can be divided into CO2 flooding, CO2 injection sealing and CO2 static sealing stages; Under reservoir conditions, CO2 may susceptible to diffusion leakage, low-velocity seepage leakage and high-velocity seepage leakage; geological safety of CO2 is subject to control of sealing pressures of caprocks, sealing pressure of fault rocks, re-opening pres- sures of faults, rock fracturing pressures in faults and caprock fracturing pressures. Relevant research results are of great importance to site selection and risk assessments for projects involving CO2 flooding and sealing.

关 键 词：CO2驱油 CO2封存 盖层封堵性 断层重开启 地质安全 

分 类 号：TE349[石油与天然气工程—油气田开发工程]