南黄海盆地中—古生代海相地层油气保存条件

发布时间：2018-03-22 08:00

本文选题：南黄海盆地　切入点：中—古生代　出处：《天然气工业》2017年05期 　论文类型：期刊论文

【摘要】：南黄海盆地中—古生代海相地层发育齐全且厚度较大,油气多源多期成藏,具备形成大型油气藏的物质基础,但一直未获得实质性的油气勘探突破。研究认为,多期构造事件造就了该叠合盆地复杂的构造格局,其良好的静态油气保存条件受到不同程度的后期叠加改造或破坏,油气保存条件成为关乎该区海相油气勘探能否取得突破的关键要素。为此,从构造运动与烃源岩条件、盖层特征、岩浆活动、水文地质地球化学特征等多个方面对该盆地海相地层的油气保存条件进行了综合分析。结果表明:(1)多期构造事件造就了该盆地复杂的构造格局,2个主要阶段(中—古生代海相盆地稳定演化阶段和中—新生代构造变格与成盆阶段)控制了区域烃源岩的发育及演化,呈现出差异性油气保存的特点;(2)相对较弱的构造改造及品质较好的厚层烃源岩发育、纵向上良好的盖层封盖性能、较弱的岩浆活动、相对封闭性的水文地质条件是该区海相地层油气保存有利区需要同时具备的前提条件。结论认为:该盆地中部的崂山隆起构造稳定、断裂活动及岩浆活动较弱,油气保存条件较为优越,发育多个油气地质条件良好且生储盖组合完整的大型构造圈闭,是该区海相古生界油气勘探最为有利的远景区带。
[Abstract]:The Meso-Paleozoic marine strata in the South Huang Hai Basin are well developed and thicker, with multi-source and multi-stage oil and gas reservoirs, and have the material foundation to form large oil and gas reservoirs, but no substantial breakthrough in oil and gas exploration has been obtained. The multi-period tectonic events created the complex tectonic framework of the superimposed basin, and its good static oil and gas preservation conditions were altered or destroyed by superposition or destruction in different degrees. The preservation condition of oil and gas has become the key factor to make a breakthrough in marine oil and gas exploration in this area. Therefore, based on tectonic movement, source rock conditions, caprock characteristics and magmatic activity, The oil and gas preservation conditions of marine strata in the basin have been comprehensively analyzed from several aspects, such as hydrogeological and geochemical characteristics. The results show that the multi-stage tectonic events have resulted in the complex tectonic framework of the basin and two main stages (middle stage). The stable evolution stage of Paleozoic marine basin and the Meso-Cenozoic tectonic change and basin stage) control the development and evolution of regional source rocks. It shows the characteristics of differential oil and gas preservation, such as relatively weak structural transformation, well developed thick hydrocarbon source rocks with good quality, good seal property of cap rocks and weak magmatic activity. The relatively closed hydrogeological condition is the prerequisite for the favorable area of marine strata oil and gas preservation. It is concluded that Laoshan uplift in the central part of the basin is stable in structure, weak in fault activity and magmatic activity. The oil and gas preservation conditions are superior, and several large structural traps with good oil and gas geological conditions and intact assemblages of source, reservoir and cap are developed, which are the most favorable prospective zones for oil and gas exploration in the marine Paleozoic in this area.
【作者单位】：中国海洋大学海洋地球科学学院;国土资源部海洋油气资源与环境地质重点实验室·中国地质调查局青岛海洋地质研究所;青岛海洋科学与技术国家实验室海洋矿产资源评价与探测技术功能实验室;
【基金】：中国地质调查局“海域油气资源调查”工程项目(编号:DD20160152)、“南黄海前第三系油气前景研究”(编号:XQ-2005-01)、“南黄海崂山隆起和滩海区海相地层油气资源战略选区”(编号:2009GYXQ10)
【分类号】：P618.13

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