榆林气田东砂带地区山2段天然气分布规律  

The distribution rules of gas in Shan 2 Member in Dongshadai area of Yulin gas field

作　　者：曲良超[1] 卞昌蓉 胡华君 

机构地区：[1]中国地质大学(北京)能源学院,北京100083 [2]中国石油化工股份有限公司石油勘探开发研究院,北京100083 [3]中国石油天然气勘探开发公司,北京100034

出　　处：《陕西师范大学学报（自然科学版）》2012年第6期102-105,共4页Journal of Shaanxi Normal University：Natural Science Edition

基　　金：国家科技重大专项项目(2011ZX05009-002-106);国家自然科学基金重大研究计划(91114203)

摘　　要：通过研究鄂尔多斯盆地榆林气田东砂带地区山2段天然气成藏地质条件,认为榆林气田东砂带地区山2段天然气具有以下分布规律:垂向上山2段煤层、沼泽相暗色泥岩及三角洲前缘砂体发育,具备自生自储的成藏组合条件;平面上三角洲前缘水下分流河道—河口坝微相中石英含量高的砂体,储层物性好,天然气产量高;气藏分布与砂岩成熟度表现出很好的相关性,利用成熟度指数6(相当石英百分含量86%)基本可圈定气藏相对富集高产带.利用此规律可指导该区下一步天然气的勘探与开发.Based on the research of gas pool forming conditions of Shan 2 Member in Dongshadai area of Yulin gas field in Ordos basin, the distribution rules of gas can be concluded that coals, swap dark mudstones and delta front sandbodies are well-developed vertically, the conditions of reservoir-forming combination for self-generation and self-preservation are processed; the sandbodies developed in submerged distributary channel and mouth bar microfacies of delta front have high content of quartz, which have good physical properties and high gas production. There is a good relationship between the distribution of gas pools and the maturity of sandstone, the value 6 of maturity index（86% quartz content） can be used to delineate the zones of gas enrichment and productivity. This rule can guide the exploration and production of this area in next step.

关 键 词：榆林气田 天然气分布 东砂带 山2段 石英含量 成熟度 

分 类 号：TE12[石油与天然气工程—油气勘探]