取心井渗透率数值模拟及精细评价方法研究  

Research on numerical simulation and fine evaluation methods for permeability of cored wells

作　　者：刘土亮 胡向阳 袁伟 吴健 杨毅 LIU Tuliang;HU Xiangyang;YUAN Wei;WU Jian;YANG Yi(Research Institute of Zhanjiang Company,CNOOC Ltd.,Zhanjiang,Guangdong 524057,China;Research Institute of Hainan Company,CNOOC Ltd.,Haikou,Hainan 570300,China)

机构地区：[1]中海石油(中国)有限公司湛江分公司 [2]中海石油(中国)有限公司海南分公司

出　　处：《录井工程》2023年第4期55-60,共6页Mud Logging Engineering

基　　金：“十三五”国家科技重大专项“南海西部海域低渗油藏勘探开发关键技术”(编号:2016ZX05024-006)。

摘　　要：针对M油田岩性复杂,储层非均质性强,渗透率随孔隙度变化关系复杂的情况,从岩石渗流机理出发,推导建立了渗透率计算模型,并模拟分析了粒度中值、分选系数对渗透率的影响。模拟分析结果表明,随着孔隙度增加、粒度中值增大、分选系数减小,渗透率均表现出增加的趋势。在此认识的基础之上,根据粒度特性参数将区域储层划分为2类,分别建立了不同储层类型渗透率计算模型。对比分析可知,新的渗透率计算模型提高了取心井渗透率的解释精度,为产能预测及寻找优质储层奠定了基础。Because of complex lithology and strong heterogeneity,the relationship of permeability changing with porosity is complex in M Oilfield.Starting from seepage mechanism,permeability calculation model is established by deriving.The influence of median size and sorting coefficient on permeability has also been simulated.Simulation results show that permeability increases with the increase of porosity,median size and the decrease of sorting coefficient.Based on the above understanding,the reservoir in the studied area has been divided into two types according to the grain size parameter and permeability calculation model of each type reservoir has been built up.Comparative analysis of calculated permeability and core analysis permeability shows that the new permeability calculation model improves the permeability calculation accuracy of cored wells,which laid a solid foundation for productivity prediction and looking for high quality reservoirs.

关 键 词：渗透率 数值模拟分析 粒度中值 分选 粒度特性参数 

分 类 号：TE132.1[石油与天然气工程—油气勘探]