L油藏蒸汽吞吐后期剩余油分布研究  

Study on distribution of remaining oil in L Reservoir after steam stimulation

作　　者：王腾 李康康 王剑 WANG Teng;LI Kangkang;WANG Jian(Instite of Petroleum Engineering,China University of Petroleum,Beijing 102249,China)

机构地区：[1]中国石油大学(北京)石油工程学院,北京102249

出　　处：《复杂油气藏》2021年第1期61-68,97,共9页Complex Hydrocarbon Reservoirs

摘　　要：L油藏经过近30年蒸汽吞吐开发,目前已进入吞吐中后期,开发效果日益变差。为了弄清剩余油分布状况,改善注蒸汽开发效果,开展了数值模拟研究。利用CMG软件进行L油藏地质建模并完成地质储量、产量及含水率的历史拟合,拟合误差小于5%,拟合精度较高,得到了可信的剩余油分布结果。剩余油主控因素分析显示,地层系数、储层非均质性与井间干扰等因素综合影响剩余油分布。为定量描述各类型剩余油储量,通过灰色关联理论逐层逐井区计算了剩余油影响因素的关联度,确定了剩余油类型。计算结果表明,L油藏主要发育薄差储层型剩余油和井间滞留型剩余油,其次为射孔对应性差型剩余油。通过灰色关联方法计算得到的剩余油定量分布为后续剩余油挖潜提供了指导。After nearly 30 years of steam stimulation development,the L Reservoir has entered the middle and late stage of steam huff and puff,and the development effect is getting worse.In order to improve the development effect of steam injection and clarify the distribution of remaining oil,the numerical simulation research was carried out.Geological modeling of L Reservoir was built by CMG software,and then it was completed the history matching of geological reserves,oil production,and water cut.The fitting error was less than 5%,and the reliable results of remaining oil distribution were obtained.The analyses of the main controlling factors of remaining oil distribution show that factors such as formation coefficient,reservoir heterogeneity,and inter-well interference comprehensively affect the distribution of remaining oil.In order to quantitatively describe the remaining oil reserves of various types,the correlation degree of remaining oil influencing factors was calculated layer by layer and well area by grey relation alanalysis(GRA),and the remaining oil type was determined.The calculation results show that in L Oil-reservoir,there are mainly thin and poor reservoir type remaining oil and inter-well retention type remaining oil,followed by poor perforation correspondence type remaining oil.The quantitative distribution of remaining oil calculated by GRA provides guidance for the subsequent tapping of remaining oil potential.

关 键 词：稠油油藏 蒸汽吞吐 数值模拟 剩余油 灰色关联 

分 类 号：TE327[石油与天然气工程—油气田开发工程]