摘要
为了解决目前对油藏开展CO_2驱油提高采收率影响因素的筛选及适宜性评价尚局限于定性或半定量分析的问题,通过引入灰色关联分析方法,对国内外7个已先后开展CO_2驱油的油藏进行CO_2驱油提高采收率影响因素关联度、权重系数计算,定量分析CO_2驱油提高采收率过程中各影响因素的强弱;同时,对已开展CO_2驱油的油藏进行CO_2驱油适宜度计算,评价油藏开展CO_2驱油的适宜性;并利用该方法对定边—吴起油田开展CO_2驱油适宜性进行评价。结果表明:CO_2驱油提高采收率影响因素由强到弱的顺序依次为压力比、地层有效厚度、地层埋深、地层原油黏度、地面原油密度、剩余油饱和度、油藏温度、孔隙度、渗透率;定边—吴起油田开展CO_2驱油油藏以Ⅰ类和Ⅱ类油藏为主,说明评价区域开展CO_2驱油的适宜性较强。
In order to solve the problems that the influencing factor selection and suitability evaluation of enhancedoil recovery(EOR)by CO2flooding are limited to qualitative or semi quantitative analysis,grey correlationanalysis method was introduced to calculate the association degree and weight coefficient of the EOR influencingfactors by CO2flooding in seven CO2flooding reservoirs,and the EOR influencing factors by CO2floodingwere quantitatively analyzed.Meantime,the suitability of CO2flooding in reservoir was evaluated,and this methodwere used to evaluate CO2flooding potential in Dingbian-Wuqi oilfield.The results show the order of EOR influencefactors from strong to weak:ratio of MMP to original reservoir pressure,formation effective thickness,burieddepth,crude oil viscosity underground,ground crude oil density,remaining oil saturation,reservoir temperature,porosity and permeability.The CO2flooding is mainly for typeⅠandⅡreservoirs in Dingbian-Wuqi oilfield,which means that it is suitable for CO2flooding in the oilfield.
作者
杨红
王宏
南宇峰
屈亚宁
梁凯强
江绍静
YANG Hong;WANG Hong;NAN Yufeng;QU Yaning;LIANG Kaiqiang;JIANG Shaojing(Research Institute of Shaanxi Yanchang Petroleum(Group)Co.,Ltd.,Xi’an 710075,China;PetroChina Oil and Gas Control Center in Beijing,Beijing 100007,China;Dingbian Oil Production Plant,Yanchang Oilfield Co.,Ltd.,Yulin 719000,Shaanxi,China)
出处
《岩性油气藏》
CSCD
北大核心
2017年第3期140-146,共7页
Lithologic Reservoirs
基金
国家科技支撑计划课题"CO_2埋存与提高采收率技术"(编号:2012BAC26B03)
陕西省科技统筹创新工程计划项目"陕北致密砂岩油藏CO_2驱提高采收率关键技术研究及先导试验"(编号:2014KTZB03-02)联合资助
关键词
CO2驱油
灰色关联分析
采收率
适宜性
CO2 flooding
grey correlation analysis
oil recovery
suitability
