川西坳陷回龙构造雷口坡组天然气成藏条件

发布时间：2018-04-27 06:31

本文选题：成藏条件 + 地球化学　；参考：《特种油气藏》2018年01期

【摘要】：以区域地质研究为基础,通过三维地震解释并利用有机地球化学分析等技术手段,综合分析了川西坳陷回龙构造雷口坡组天然气成藏条件及其勘探潜力。结果表明,回龙地区海相烃源岩发育,纵向上沟通雷口坡组和下伏二叠系海相层系的烃源断裂及横向上雷口坡组顶部不整合面可作为油气的良好运移疏导体系,天然气成藏具有"双源供烃"的良好气源条件,且雷口坡组优质储层发育,并具有良好的生储盖组合。回龙构造圈闭类型好、断鼻圈闭面积大,且雷口坡组顶面岩溶缝洞发育区域与高部位相叠合。该区的研究及突破对于扩大川西整个雷口坡组的勘探范围和勘探领域具有重要意义,是下一步部署风险探井的有利目标区域。
[Abstract]:Based on the study of regional geology, by means of three-dimensional seismic interpretation and organic geochemical analysis, the gas accumulation conditions and exploration potential of the Leikoupo formation of the Huilong structure in the western Sichuan depression are comprehensively analyzed. The results show that the hydrocarbon source faults and the top unconformities of the Laikoupo formation and the lower Permian marine strata in Huilong area can be regarded as good migration and migration systems of oil and gas. The formation of natural gas reservoir has a good gas source condition of "double source hydrocarbon supply", and the high quality reservoir of the Leikoupo formation is developed, and has a good assemblage of source, reservoir and cap. The Huilong structural trap is of good type, the area of fault nose trap is large, and the development area of karst fracture and cave on the top surface of Leikoupo formation overlaps with that of the high part. The research and breakthrough in this area is of great significance for expanding the exploration scope and exploration field of the whole Leikoupo formation in western Sichuan and is the favorable target area for the next step to deploy the risk exploration wells.
【作者单位】：中国石化石油勘探开发研究院无锡石油地质研究所;常州工学院;
【基金】：国家科技重大专项“大型油气田及煤层气开发”之“中西部地区碎屑岩层系油气富集规律与勘探方向”专题(2016ZX05002-006)
【分类号】：P618.13

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