辽中凹陷走滑断裂带原油来源、运移及分布层系

发布时间：2018-08-09 12:27

【摘要】：渤海大部分已发现原油储量集中在郯庐走滑断裂带,而不同油田的油气来源和分布层系差异很大,因此走滑断裂带的油气运移研究具有重要意义。通过研究辽中凹陷辽中1号走滑断裂带的发育阶段,以及派生断裂的应力性质及其沟通的烃源岩和储集层,来揭示沿断裂的垂向运移对原油成因类型和分布层系的控制作用。辽中凹陷北洼处于走滑断裂发育的早期,走滑断裂并未形成统一的破裂面且不控制圈闭形成,走滑派生断裂仅沟通东营组,发育密度和活动速率小,原油来源于东三段烃源岩并就近在东二段聚集成藏,油田规模小。辽中凹陷南洼和中洼处于走滑断裂发育的晚期,走滑断裂形成统一的破裂面且控制圈闭形成,走滑派生断裂沟通沙河街组及上覆多套地层,发育密度大,原油主要来源于沙河街组烃源岩,油田规模大。其中南洼走滑派生断裂新构造运动以来发生明显活化,沟通新近系储集层,晚期活动速率大,原油主要在新近系成藏;中洼走滑派生断裂新构造运动以来未发生明显活化,仅沟通古近系,原油主要在古近系成藏。
[Abstract]:Most of the crude oil reserves in Bohai have been found in the Tanlu strike-slip fault zone, but the oil and gas source and distribution series of different oilfields are very different, so the study of oil and gas migration in the strike-slip fault zone is of great significance. By studying the developing stage of the No. 1 strike slip fault zone in the Liaozhong sag, and the stress properties of the derived faults and the associated source rocks and reservoirs, this paper reveals the controlling effect of vertical migration along the faults on the genetic types and distributional strata of crude oil. The northern depression in the central Liaoning sag is in the early stage of the development of strike-slip fault. The strike-slip fault does not form a unified fracture surface and does not control the trap formation. The strike-slip derived fault only communicates with the Dongying formation, and the development density and activity rate of the strike-slip fault are small. The crude oil comes from the source rock of the third member of the east and accumulates in the eastern member of the second member, and the oil field scale is small. Nanwa and Zhongwa in the central Liaoning sag are in the late stage of the development of strike-slip fault, the strike-slip fault forms a unified fracture surface and controls the trap formation, and the strike-slip derived fault communicates with the Shahejie formation and the overlying multiple sets of strata, and has a high density. The crude oil mainly comes from the source rock of Shahejie formation, and the oil field scale is large. Since the neotectonic movement of the strike-slip derived faults in Nanwa, the formation of the Neogene reservoir has been activated obviously, and the late active rate of the reservoir is large, the crude oil is mainly formed in the Neogene, and no obvious activation has taken place since the neotectonic movement of the Zhongwa strike-slip derived fault. Only to communicate the Paleogene, the crude oil mainly in the Paleogene to form a reservoir.
【作者单位】：中海石油(中国)有限公司天津分公司;
【基金】：国家科技重大专项(2011ZX05023-001-004)
【分类号】：P618.13

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