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Structural deformation and fluid flow from East Sichuan to the northwestern periphery of the Xuefeng Uplift,China

ISSN号：0371-5736
期刊名称：《地质论评》
时间：0
分类：P736.1[天文地球—海洋地质;天文地球—海洋科学] O342[理学—固体力学;理学—力学]
作者机构：[1]State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249, China, [2]Basin Research Center, China University of Petroleum, Beijing 102249, China, [3]CNOOC Research Institute, Beijing 100027, China
相关基金：Acknowledgements This research is sponsored by the National Basic Research Program of China （Grant No. 2012CB214804, 2005CB422107 and G 1999043305）, the National Natural Science Foundation of China （Grant Nos. 41172125, 40972090, and 40672143）, the National Key Scientific Project （Grant No. 2011ZX05002-006-007HZ, 2008ZXO5005-002- 008HZ-1）, and the Doctoral Fund of Ministry of Education of China （Grant No. 200804250001）. Research Institute of Petroleum Exploration and Development of SINOPEC, Southwest Oilfield Company of SINOPEC and Southern Branch Exploration Company of SINOPEC have given full support with fundamental geologic data.

关键词：结构变形, 西北边缘, 流体流动, 川东, 隆起, 雪峰, 油气保存条件, 流体包裹体特征, Structural deformation, fluid flow, preservation conditions, fluid inclusion, Middle and Upper Yangtze

中文摘要：

烃保藏条件在中间、上面的 Yangtze 限制了探索，并且结构的变丑和液体活动在油和气体的起源和保藏起了一个重要作用。以便学习那变丑和液体活动怎么影响烃保藏，我们做了一些领域工作并且用声学的排放和液体包括为变丑时期的分析收集了一些方解石静脉样品。与以前的研究，阶层分发，构造变丑和在学习区域有三条结构的带的液体特征表演结合了：东方四川，韦斯特湖南和湖北和 Xuefeng 的西北的圆周高举，并且他们的构造变丑风格，液体包括特征和烃保藏是不同的。突破戳很好在背斜核心被开发，并且很多烃包括在东方四川在戳附近在方解石静脉被发现。突破戳仅仅在在韦斯特湖南和湖北的向斜核心，并且盐水包括没在戳附近在方解石静脉包含烃。许多突破戳在 Xuefeng 的西北的圆周被发现高举，在仅仅有稀罕方解石静脉的地方。当在东方四川没有差错突破时，变丑和烃包括显示了那，古生代由三叠纪的地区性的帽子盖住对烃好保藏。阶层在上面更低古生代被剥光，并且大量盐水包括和表面水的深渗入在韦斯特湖南和湖北被发现，那么仅仅有一顶很好发达的志留纪地区性的帽子的向斜区域的部分有好保藏条件。强烈构造运动和剥光广泛地在 Xuefeng 的西北的圆周被开发在仅仅有 paleo 水库，非烃液体活动和差的保藏条件的地方，高举。

英文摘要：

Hydrocarbon preservation conditions have restricted exploration in the Middle and Upper Yangtze,and structural deformation and fluid activity have played an important role in the origin and preservation of oil and gas.In order to study that how the deformation and fluid activity impact the hydrocarbon preservation,we did some field work and collected some calcite vein samples for analysis of deformation periods using acoustic emission and fluid inclusions.Combined with previous studies,the strata distribution,tectonic deformation and fluid characteristics show that there are three structural belts in the study area：East Sichuan,West Hunan and Hubei and the northwestern periphery of the Xuefeng Uplift,and that their tectonic deformation style,fluid inclusion characteristics and hydrocarbon preservation are different.The breakthrough thrusts were well developed in the anticline core,and a lot of hydrocarbon inclusions were found in calcite veins around the thrusts in East Sichuan.The breakthrough thrusts were only in the syncline core in West Hunan and Hubei,and the brine inclusions did not contain hydrocarbon in calcite veins around the thrusts.Many breakthrough thrusts were found in the northwestern periphery of the Xuefeng Uplift,where there were only rare calcite veins.The deformation and hydrocarbon inclusion indicated that when there was no fault breakthrough in East Sichuan,the Paleozoic covered by the Triassic regional cap was good for hydrocarbon preservation.The strata above the Lower Paleozoic were denuded,and lots of brine inclusions and deep infiltration of surface water were found in the West Hunan and Hubei,so only the part of the syncline area with a well developed Silurian regional cap had good preservation conditions.Intense tectonic movements and denudation were widely developed in the northwestern periphery of the Xuefeng Uplift,where there were only paleo-reservoirs,non-hydrocarbon fluid activity and poor preservation conditions.

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