小型断陷湖盆有机质富集和烃源岩形成机制——以二连盆地下白垩统腾格尔组一段为例

发布时间：2018-05-05 16:06

本文选题：二连盆地 + 小型断陷湖盆　；参考：《新疆石油地质》2017年06期

【摘要】：为明确小型断陷湖盆烃源岩形成机理,开展了烃源岩形成、分布和地球化学特征的研究,综合有机质供给、保存和稀释对烃源岩形成的影响,建立了小型断陷湖盆烃源岩形成的3种模式:边界断层活动强、沉积速率大的湖盆,有机质供给量大,保存条件差,烃源岩形成主要受有机质供给控制,主要发育于有机质供给量大的深洼带;边界断层活动弱、沉积速率小的湖盆,有机质供给量小,有机质保存条件好,烃源岩形成主要受有机质保存条件控制,主要发育于还原程度强的缓坡带;边界断层活动强度和沉积速率居中的湖盆,有机质供给量较大,保存条件较好,烃源岩形成受沉积速率、有机质供给和保存的综合控制,在深洼带和近洼缓坡带均有发育。
[Abstract]:In order to clarify the formation mechanism of source rocks in small faulted lacustrine basins, the formation, distribution and geochemical characteristics of source rocks were studied, and the effects of organic matter supply, preservation and dilution on the formation of source rocks were studied. Three models of source rock formation in small faulted lacustrine basin are established: the lake basin with strong boundary fault activity, large deposition rate, large supply of organic matter, poor preservation conditions, and the formation of source rock is mainly controlled by organic matter supply. It is mainly developed in deep depression with large organic matter supply, weak boundary fault activity, low deposition rate, low organic matter supply, good organic matter preservation condition, and the formation of hydrocarbon source rock is mainly controlled by organic matter preservation condition. Mainly developed in the gentle slope zone with strong degree of reduction, in the lacustrine basin where the activity intensity and deposition rate of the boundary faults are in the middle, the organic matter supply is larger, the preservation condition is better, the formation of the source rock is controlled by the sedimentation rate, the organic matter supply and the preservation, Both deep and near-lying gentle slope zones are well developed.
【作者单位】：中国石油大学地球科学与技术学院;中国石油大学地球科学学院;中联煤层气国家工程研究中心有限责任公司;中国石油塔里木油田分公司勘探开发研究院;中国石油大庆油田有限责任公司采油工程研究院;中国石油技术开发公司;
【基金】：国家科技重大专项(2016ZX05006-007) 山东省自然科学基金(ZR2013DM016)
【分类号】：P618.13

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