Y146井区延7煤层特征及对储层的影响  

The characteristics of coal seam and it's impact on reservoir of Yan 7 in Y146 wellblock

作　　者：唐浩博 赵永刚 张栋梁[3] 宿墨瀚 谭曾 司卓雅 侯伟怡 TANG Haobo;ZHAO Yonggang;ZHANG Dongliang;SU Mohan;TAN Zeng;SI Zhuoya;HOU Weiyi(School of Earth Sciences and Engineering,Xi′an Shiyou University,Xi′an Shaanxi 710065,China;Shaanxi Key Laboratory of Petroleum Accumulation Geology,Xi'an Shiyou University,Xi′an Shaanxi 710065,China;Oil Production Plant 9 of PetroChina Changqing Oilfield Company,Yinchuan Ningxia 750006,China)

机构地区：[1]西安石油大学地球科学与工程学院,陕西西安710065 [2]西安石油大学陕西省油气成藏地质学重点实验室,陕西西安710065 [3]中国石油长庆油田分公司第九采油厂,宁夏银川750006

出　　处：《石油化工应用》2023年第2期102-106,共5页Petrochemical Industry Application

基　　金：2021年陕西省省级大学生创新创业训练计划项目,项目编号:201911030105;陕西省自然科学基础研究计划项目,项目编号:2019JM-381。

摘　　要：在调研三角洲平原中的煤层分布情况及分析研究区延7段煤层发育、分布特征的基础上,探讨煤层对储层非均质性的影响。研究认为:煤层可以形成于多种沉积环境中,湖泊三角洲平原中出现的煤层虽不能发育为煤储层,但可作为储层中的煤隔夹层出现;研究区延7段煤层的发育、分布主要受控于湖泊三角洲平原沼泽微相;延7_(2)煤层比延7_(1)厚,延7_(2)平面上西北区域煤层厚度大,东南区域煤层分布面积大;延7_(1)、延7_(2)煤隔夹层与泥岩、粉砂质泥岩、泥质粉砂岩、致密粉砂岩等一起通过一定程度增强层间、层内非均质性使研究区延7段储层具有中等~强的非均质性特征。该研究希望能引起油气勘探开发工作者对含油储层中煤隔夹层的重视,以期更加科学高效地开发煤系碎屑岩油藏。Based on the investigation of the distribution of coal seam in delta plain and the analysis of the development and distribution characteristics of Yan 7 coal seam,the influence of coal seam on reservoir heterogeneity is discussed.The study shows that the coal seam can be formed in various sedimentary environments.Although the coal seam in the lacustrine delta plain can not develop into coal reservoir,it can appear as coal interlayer in the reservoir.The development and distribution of Yan 7 coal seam is mainly controlled by the lacustrine delta plain swamp microfacies.The thickness of coal seam in Yan 7_(2) is thicker than the thickness of coal seam in Yan 7_(1),and the thickness of northwest coal seam in Yan 7_(2) plane is large,the area of coal seam distribution in southeast area is large.The coal interlayer of Yan 7_(1) and Yan 7_(2),together with mudstone,silty mudstone,argillaceous siltstone and tight siltstone,enhance the heterogeneity of interlayer and interlayer to a certain extent,so that Yan 7 reservoir in the study area has the medium heterogeneity to good heterogeneity.It is hoped that the study will arouse the attention of oil and gas exploration and development workers to the coal interlayer in oil-bearing reservoirs,so as to develop coal-bearing clastic reservoirs more scientifically and efficiently.

关 键 词：延7段 三角洲平原 煤层 储层非均质性 隔夹层 

分 类 号：TE122.22[石油与天然气工程—油气勘探]