摘要
油页岩在油气生成过程中的排烃效率是人们一直关心的问题。勘探实践证明,黄骅坳陷孔南地区孔店组和沙河街组页岩是重要生油岩,油页岩是能够有效并大量排烃的,但具体特征尤其是在较低演化阶段排烃效率如何仍是一个值得研究的问题。本研究通过模拟试验手段,对未成熟油页岩在不同演化阶段生、排烃特征进行了分析,建立了油页岩的生、排烃模式。认为孔南地区油页岩在低演化阶段具备了生、排烃能力,且排烃量较大。与该区同类型泥岩相对比,油页岩低演化阶段排烃效率低于泥岩,但绝对排烃量却高于泥岩,随演化程度增加两者的排烃效率趋于一致。这一认识应用到该地区资源评价当中,为油气勘探部署提供了重要依据。
For years, hydrocarbon expulsion of oil shale during hydrocarbon generation has been concerned by poeple . It was indicated through study that Kongdian Formation and Shahejie Formation oil shale in South Kongdian Area in Huanghua Depression were primary source rocks. And it was shown by practical exploration that a large amount of hydrocarbon could be effectively expulsed from the oil shale in this area. However, more researches were conducted on its characteristics, especially expulsion efficiency of hydrocarbon at the stage of lower evolution. This paper conducts simulation experiment, analyzes hydrocarbon generation and expulsion characteristics of immature oil shale at different stages of evolution, and accordingly establishes hydrocarbon expulsion mode of oil shale. It is indicated that the shale in this area, to some extent, presents expulsion capacity at its lower evolution stage, and its expulsion efficiency of hydrocarbon increases gradually with the rising of evolution degree. Compared with mudstone in this area, the shale is worse in expulsion capacity at lower evolution stage. Their expulsion efficiency of hydrocarbon, however, approaches to be in accordant with the rising of evolution degree. This paper presents an important basis for hydrocarbon exploration and deployment in the area of South Kongdian.
出处
《石油天然气学报》
CAS
CSCD
北大核心
2009年第2期1-5,共5页
Journal of Oil and Gas Technology
基金
国家科技重大专项课题(2008ZX05018-002)
关键词
黄骅坳陷
孔南地区
油页岩
排烃效率
模拟试验
Huanghua Depression
Kongnan Area
oil shale
hydrocarbon expulsion
simulation experiment
