摘要
三塘湖盆地原油具有三种成因类型,北小湖油田原油Pr/Ph比高,C_(24)四环萜烷及C_(29)甾烷富集,碳同位素重,具有煤成油的特征,油源主要来自条湖凹陷小泉沟群下部煤系泥岩;牛圈湖、马中、黑墩等油田及石板墩、西峡沟等含油气构造带上原油为强还原、咸水湖相成因原油,以高含量的三环萜类、γ-蜡烷、β-胡萝卜烷、C_(28)甾烷及低Pr/Ph比为特征,油源主要来自上二叠统芦草沟组烃源岩;塘参3下二叠统及石炭系原油相对富集C_(27)规則甾烷,成熟度高,油源来自下二叠统和石炭系。
The crude oil type of Santanghu basin may be divided into three types. The erode produced in Beixiaohu reservoir with high Pr/Ph tafio, rich C_(24) tetranuclear terpane and C_(29) sterane and heavy carbon isotope shows the characteristics of coal-derived oil. Its off source mainly comes from the lower coal measure mudstone of Xiaoquangou group in Tiaohu depression. The crude produced from Niuquanhu, Mazhong, Heidun reservoir and Shibandun, and Xixiagou oil-gasbearing structural belt is strong reduction environment, saline lake facies genesis, characterized by high content tricyclic terpenoids, γ-paraffin, β-carrotane, C_(28) sterane and low Pr/Ph ratio. Its oil source mainly comes from the hydrocarbon source rock of Lucaogou group in upper Permian. The maturity of the rich C_(27) regular sterane in Well Tangean 3 lower Permian and Carbonic is high and its oil source comes from lower Permain and Carbonic.
出处
《吐哈油气》
2000年第4期1-5,97,共6页
Tuha Oil & Gas
关键词
三塘湖盆地
原油类型
地化特征
油源对比
Santanghu basin, crude oil type, geochemical behaviour, oil source correlation
