摘要
鉴于西藏高原油气藏具良好生储层,保存难度较大,本次工作目的是探讨低分水岭盆地盖层特征与油气保存关系.通过测试可能盖层的物性参数,分析盖层的孔隙度、渗透率、突破压力,结合经验参数和可能盖层的横向展布、真实厚度,及后期构造作用,客观评价盆地盖层特征.结果显示本区各地层中都存在可能盖层,不同岩性、不同层位、不同厚度的盖层表现出封闭能力不同,这可能与后期构造作用有关.低分水岭盆地中多为有利-较好盖层,其中碳酸盐盖层比页岩好.
Although there are favorable source-reservoir the in the tibetan oil-gas reservoir, conservation is greatly difficult. In this paper we study on relation between cover rock features and oil-gas preservation in the Difenshuiling basin. By analysis on cover porosity,permeability, breakthrough pressure and consulting experience, extended distributing, thickness, late tectonic effect,we rightly evaluate feature of cover rocks.Studying result shows exist probable cover rocks in the different stratum. Different lithology, differem stratum,different thick cover rocks have different sealing capability; There are many favorable-common cover rocks and carbonate cover rock is better than shale＇s.
出处
《新疆地质》
CAS
CSCD
北大核心
2010年第1期77-80,共4页
Xinjiang Geology
基金
<惩香错-吉隆石油地质走廊大剖面综合调查>(科油[2005]012号)
矿物学
岩石学
矿床学国家重点(培育)学科建设项目(SZD0407)项目资助
关键词
低分水岭盆地
物性参数
横向展布
厚度
封闭能力
Difenshuiling basin
Petrophysical parameters
Extended distributing
Thickness
Sealing capability
