渤海湾盆地428构造烃源岩地球化学特征及评价  

Geochemistry Features and Evaluation of Source Rock, 428 Area, Bohaiwan Basin

作　　者：张文凯[1] 谢丹[1] 王鹏[1] 侯强[1] 周瑶[1] 李延飞[1] 

机构地区：[1]成都理工大学能源学院,四川成都610059

出　　处：《天然气技术与经济》2015年第2期13-16,77,共4页Natural Gas Technology and Economy

基　　金：国家自然科学基金(编号:41172119)

摘　　要：近两年来在渤海湾盆地428围区钻探了一批新井,见到了良好的油气显示。为了弄清该区油气成藏条件,提高油气勘探成功率,对研究区东营、沙河街组3套烃源岩开展新一轮评估,对其有机碳含量、干酪根元素组成、干酪根类型以及镜质体反射率等地球化学参数进行了分析。研究表明,渤海湾盆地428地区烃源岩分布范围广、厚度大;烃源岩有机质丰度高,有机碳含量普遍大于1.0%;烃源岩有机质类型较好,以Ⅱ型干酪根为主,少量Ⅰ型;有机质处于低至成熟阶段,有利于石油生成。研究区3套烃源岩都是较为有利的烃源岩,相对而言,埋深最大的沙三段品质最好,沙一+二段次之,埋深最浅的东营组最差。In 428 area, Bohaiwan Basin, better oil and gas show appears from some newly drilled wells in recent two years. In order to understand fully reservoir-forming conditions and to increase an exploration success ratio, a new-roll evaluation on three suites of source rock from both Dongying and Shahejie formations was carried out, and some geochemical parameters were analyzed, including organic carbon content, kerogen composition and type, and vitrinite reflection ratio. Results show that(1) source rock with large thickness is widely developed at the study area;(2) the organic matter has high abundance and the carbon content is often more than1.0 %;(3) the types of organic matter are better, with type II kerogen as the soul and a little type I kerogen;(4) the organic matter is in low mature to mature stage, which is favorable for generating oil;(5) three suites of source rock are favorable ones, in which, the best is Shahejie 3 Member with the largest burial depth, the second for Shahejie 1 and Shahejie 2 members, and the last for Dongying Formation with the shallowest burial depth, respectively.

关 键 词：渤海湾盆地 东营组 沙河街组 烃源岩 地化特征 

分 类 号：P618.13[天文地球—矿床学]