查干凹陷巴二段烃源岩评价及排烃特征研究  

Source-rock Evaluation and Hydrocarbon-expulsion Characteristics of Bayingebi 2 Member,Chagan Depression

作　　者：李鹏[1] 罗小平[1] 邓已寻[2] 徐猛[1] 

机构地区：[1]"油气藏地质及开发工程"国家重点实验室.成都理工大学,四川成都610059 [2]中国石化中原油田分公司勘探开发科学研究院,河南濮阳457001

出　　处：《天然气技术与经济》2012年第4期8-12,77,共5页Natural Gas Technology and Economy

基　　金：中国石化重大科研攻关项目"银-额盆地查干凹陷油气富集主控因素研究"(P10001)

摘　　要：根据烃源岩厚度、有机质丰度、类型和成熟度对查干凹陷白垩系巴音戈壁组二段烃源岩进行了评价,在此基础上,利用生烃潜力法对巴二段的排烃特征进行研究并对其排烃强度进行评价。研究发现巴二段烃源岩层厚度大,有机质丰度高、类型好,但东西部次凹差别较大;巴二段烃源岩的排烃门限和排烃高峰分别对应于1600m和2700m;平均排烃效率为55%,最大可达80%;平均排烃强度为200×104t/km2。展现了良好的资源勘探潜力。In this paper,the source rock of Cretaceous Bayingebi 2 Member in Chagan Depression,is evaluated,including its thickness,organic-matter abundance,type and maturity.In addition,not only the hydrocarbon-expulsion characteristics are studied by means of a method of hydrocarbon-generation potential,but also the hydrocarbon-expulsion intensity is also evaluated.Results show that (1) the source rock is featured by large thickness,high abundance and better type of organic matter,however,bigger difference existing between west and east subdepressions;(2) the expulsion threshold and peak are 1,600m and 2,700m,respectively;(3) the average expulsion efficiency is 55%, the maximum of 80%; and (4) the average expulsion intensity is 200 × 104t/km2 .All these characteristics indicate that there is a better exploration potential.

关 键 词：查干凹陷 巴二段 烃源岩 排烃模式 排烃强度 

分 类 号：P618.13[天文地球—矿床学]