Petroleum Science >2012,??Issue 4:??429-435 DOI: https://doi.org/10.1007/s12182-012-0226-5
Structural deformation and fluid flow fromEast Sichuan to the northwestern peripheryof the Xuefeng Uplift, China Open?Access
文章信息
作者：Tang Liangjie and Cui Min
作者单位：
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
投稿时间：2011-08-21
引用方式：Tang, L. & Cui, M. Pet. Sci. (2012) 9: 429. https://doi.org/10.1007/s12182-012-0226-5
文章摘要
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.
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.
关键词
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Structural deformation, fluid flow, preservation conditions, fluid inclusion, Middle andUpper Yangtze