南图尔盖盆地原油成因与油气运聚关系  

Origin of Crude Oil and Relation with Hydrocarbon Migration and Accumulation in South Turgai Basin

作　　者：吴林钢[1,2] 李秀生[1] 王成云[1] 方甲中 张津海 高岗[1] 

机构地区：[1]中国石油大学石油工程学院,北京102249 [2]中国石油哈萨克斯坦公司,哈萨克斯坦阿拉木图050000 [3]中油国际(PK)有限责任公司,孜洛尔达哈萨克斯坦120001

出　　处：《新疆石油地质》2012年第4期509-512,共4页Xinjiang Petroleum Geology

摘　　要：对南图尔盖盆地大量原油样品进行了有机地化的系统分析,并依据盆地构造特征探讨了油气运聚特征。根据原油生物标志化合物与碳同位素特征等把原油划分成了A、B、C三大类,根据生物标志化合物和成熟度的差异又把B类型原油分成了B1、B2类。烃源岩包括湖相与煤系两大类。其中A类主要来自湖相卡拉甘塞组烃源岩;B1类主要来自湖相多尚组烃源岩,可能有少量来自卡拉甘塞组烃源岩的原油混入,B2类主要来自多尚组烃源岩,混入少量来自下侏罗统埃巴林组煤系烃源岩的原油;C类原油主要来自埃巴林组煤系烃源岩。凹陷内的油气主要沿砂体、基底不整合与断裂向两侧的凸起进行侧向运移。阿雷斯库姆凹陷内的卡拉套走滑断裂两侧已发现了大量油气,但仍有较大勘探潜力。Great numbers of crude samples in South Turgai basin were analyzed in organic geochemistry.Its oil-gas migration and accumulation features were discussed according to the structural characteristics in this basin.On the basis of their biomarker compounds and carbon isotope,the oils could be divided into Type-A,Type-B and Type-C.According to the differences between their biomarker and maturity,Type-B oil is then sub-divided into two types of B1 and B2.The source rocks in this basin include two kinds of lacustrine and coal-measure ones.Type-A oil comes mainly from lacustrine source rocks of Karagansay formation,Type-B1 oil mainly from lacustrine source rocks of Doshan formation,part of it from Karagansay formation,and Type-B2 oil is mainly from Doshan formation,mixed with some oil generated from source rocks of Aybelin formation of Lower Jurassic.Type-C oil comes from Aybelin formation.The hydrocarbon migration of this basin is in lateral way mainly along sand body,basement unconformity and fault.The great fault communicating the deep source rocks becomes major channel for hydrocarbon migration from the deep to the shallow.Large amounts of oil and gas have been found on both sides of the Karatau strike-slip fault in Aryskum sag,but there are still greater petroleum exploration potentials.

关 键 词：南图尔盖盆地 原油类型 油气运聚 湖相烃源岩 煤系烃源岩 卡拉套走滑断裂 

分 类 号：TE112.1[石油与天然气工程—油气勘探]