准噶尔盆地玛湖凹陷砾岩油藏岩电实验方法研究  

Study on experimental method of rock electricity for conglomerate reservoir in Mahu sag,Junggar basin

作　　者：郭慧英 杨万立 周波 刘财广 刘赛 周浩 朱亚婷[3] GUO HuiYing;YANG WanLi;ZHOU Bo;LIU CaiGuang;LIU Sai;ZHOU Hao;ZHU YaTing(Research Institute of Experiment and Detection,Xinjiang Oilfield Company,PetroChina,Karamay 834000,China;Reservoirs Appraisal Department,Xinjiang Oilfield Company,PetroChina,Karamay 834000,China;Research Institute of Exploration and Development,Xinjiang Oilfield Company,PetroChina,Karamay 834000,China)

机构地区：[1]中国石油新疆油田分公司实验检测研究院,克拉玛依834000 [2]中国石油新疆油田分公司评价处,克拉玛依834000 [3]中国石油新疆油田分公司勘探开发研究院,克拉玛依834000

出　　处：《地球物理学进展》2022年第2期600-606,共7页Progress in Geophysics

基　　金：新疆砾岩油藏实验室开放性课题(2019D04008)资助.

摘　　要：准噶尔盆地玛湖凹陷砾岩油藏具有粒级变化大、低孔渗、孔隙结构复杂、非均质性强的特点,对准确测量岩电参数是一个巨大挑战.本次研究使用2.54 cm、3.81 cm岩样,开展了离心法和半渗透隔板法的岩电实验,以期通过对比电测井计算饱和度评价和密闭取心饱和度得到优选的砾岩油藏岩电实验方法.研究发现:3.81 cm岩样测量的地层因素与孔隙度的关系更好,m值也略小;离心法做不到毛管压力与电性平衡,测量的饱和度指数n偏大,计算含水饱和度结果与密闭取心饱和度分析结果差异大,不能用于玛湖砾岩油藏;半渗透隔板法能够做到毛管与电性平衡,应用饱和度指数特别是3.81 cm岩样实验测量得到的饱和度指数计算的含油水饱和度相对密闭取心饱和度的偏差一般小于2%,能够满足砾岩油藏使用.Conglomerate reservoir in Mahu sag of Junggar basin is characterized by large grain size change,low porosity and permeability,complex pore structure and strong heterogeneity,which is a great challenge for accurate measurement of rock electrical parameters.In this study,2.54 cm and 3.81 cm rock samples were used to carry out the rock electricity experiment of centrifugal method and semi permeable diaphragm method,hoping to obtain the preferred rock electricity experiment method of conglomerate reservoir by comparing the saturation evaluation of electric logging calculation and closed coring saturation.The results show that:the relationship between formation factors and porosity of 3.81 cm rock sample is better,and m value is slightly smaller;centrifugal method can not balance capillary pressure and electrical property,and the saturation index n measured is too large,so the calculated water saturation results and closed coring saturation are compared.The results show that the analysis results are quite different and can not be used in Mahu conglomerate reservoir;the semi permeable diaphragm method can achieve capillary and electrical balance,and the deviation of oil-water saturation calculated by saturation index,especially the saturation index measured by 3.81 cm rock sample experiment,is generally less than 2%,which can meet the needs of conglomerate reservoir.

关 键 词：砾岩 非均质 岩电参数 离心法 隔板法 

分 类 号：P631[天文地球—地质矿产勘探]