Evolution of continental formation pressure in the middle part of the Western Sichuan Depression and its significance on hydrocarbon accumulation

Evolution of continental formation pressure in the middle part of the Western Sichuan Depression and its significance on hydrocarbon accumulation

Based on the distribution features of present formation pressure, analysis on logging data, and genetic mechanisms of abnormal pressure, the overpressure evolution was reconstructed using numerical basin simulation and other quantitative analysis methods. The phase differences of pressure increasing...

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Main Authors: Yingchun GUO, Xiongqi PANG, Dongxia CHEN, Jigao LENG, Jun TIAN
Format: Article
Language:English
Published: KeAi Communications Co., Ltd. 2012-08-01
Series:Petroleum Exploration and Development
Online Access:http://www.sciencedirect.com/science/article/pii/S1876380412600627
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spelling doaj-8b5151c082c146e7b2b6dc1cba0444a62021-03-02T10:01:45ZengKeAi Communications Co., Ltd.Petroleum Exploration and Development1876-38042012-08-01394457465Evolution of continental formation pressure in the middle part of the Western Sichuan Depression and its significance on hydrocarbon accumulationYingchun GUO0Xiongqi PANG1Dongxia CHEN2Jigao LENG3Jun TIAN4State Key Laboratory of Petroleum Resource and Prospecting, China University of Petroleum, Beijing 102249, China; Research Center for Basin and Reservoir, College of Geosciences, China University of Petroleum, Beijing 102249, China; Corresponding authorState Key Laboratory of Petroleum Resource and Prospecting, China University of Petroleum, Beijing 102249, China; Research Center for Basin and Reservoir, College of Geosciences, China University of Petroleum, Beijing 102249, ChinaState Key Laboratory of Petroleum Resource and Prospecting, China University of Petroleum, Beijing 102249, China; Research Center for Basin and Reservoir, College of Geosciences, China University of Petroleum, Beijing 102249, ChinaExploration and Development Research Institute, Southwest Branch Company, Sinopec, Chengdu 610081, ChinaExploration and Development Research Institute, Southwest Branch Company, Sinopec, Chengdu 610081, ChinaBased on the distribution features of present formation pressure, analysis on logging data, and genetic mechanisms of abnormal pressure, the overpressure evolution was reconstructed using numerical basin simulation and other quantitative analysis methods. The phase differences of pressure increasing mechanisms, enhancement differences among different mechanisms, and the control of geopressure evolution on gas migration and accumulation were discussed. The causes of overpressure in the Xujiahe Formation include under-compaction (from early Late Triassic to the end of the Jurassic), hydrocarbon generation (from end of the Early Jurassic to the Neogene) and tectonic compression (since the Cretaceous). It is suggested that tectonic compression and hydrocarbon generation are the principal factors of the present overpressure in the Xujiahe Formation. Overpressure transmission is the main cause of overpressure in the Jurassic strata which occurred during the intense tectonic activity periods since the Cretaceous. The overpressure is the main force for hydrocarbon migration and overpressure-related microfractures are the major pathways for gas migration. Fault transport and overpressure driving caused the formation of Jurassic secondary gas reservoirs with distant sources. The areas with high pressure coefficient in the Jurassic and high-overpressure zones in the Xujiahe Formation are optimum targets for exploration. Key words: abnormal pressure, under-compaction, hydrocarbon generated overpressure, tectonic compression, overpressure transmission, hydrocarbon accumulation, Western Sichuan Depressionhttp://www.sciencedirect.com/science/article/pii/S1876380412600627
collection DOAJ
language English
format Article
sources DOAJ
author Yingchun GUO
Xiongqi PANG
Dongxia CHEN
Jigao LENG
Jun TIAN
spellingShingle Yingchun GUO
Xiongqi PANG
Dongxia CHEN
Jigao LENG
Jun TIAN
Evolution of continental formation pressure in the middle part of the Western Sichuan Depression and its significance on hydrocarbon accumulation
Petroleum Exploration and Development
author_facet Yingchun GUO
Xiongqi PANG
Dongxia CHEN
Jigao LENG
Jun TIAN
author_sort Yingchun GUO
title Evolution of continental formation pressure in the middle part of the Western Sichuan Depression and its significance on hydrocarbon accumulation
title_short Evolution of continental formation pressure in the middle part of the Western Sichuan Depression and its significance on hydrocarbon accumulation
title_full Evolution of continental formation pressure in the middle part of the Western Sichuan Depression and its significance on hydrocarbon accumulation
title_fullStr Evolution of continental formation pressure in the middle part of the Western Sichuan Depression and its significance on hydrocarbon accumulation
title_full_unstemmed Evolution of continental formation pressure in the middle part of the Western Sichuan Depression and its significance on hydrocarbon accumulation
title_sort evolution of continental formation pressure in the middle part of the western sichuan depression and its significance on hydrocarbon accumulation
publisher KeAi Communications Co., Ltd.
series Petroleum Exploration and Development
issn 1876-3804
publishDate 2012-08-01
description Based on the distribution features of present formation pressure, analysis on logging data, and genetic mechanisms of abnormal pressure, the overpressure evolution was reconstructed using numerical basin simulation and other quantitative analysis methods. The phase differences of pressure increasing mechanisms, enhancement differences among different mechanisms, and the control of geopressure evolution on gas migration and accumulation were discussed. The causes of overpressure in the Xujiahe Formation include under-compaction (from early Late Triassic to the end of the Jurassic), hydrocarbon generation (from end of the Early Jurassic to the Neogene) and tectonic compression (since the Cretaceous). It is suggested that tectonic compression and hydrocarbon generation are the principal factors of the present overpressure in the Xujiahe Formation. Overpressure transmission is the main cause of overpressure in the Jurassic strata which occurred during the intense tectonic activity periods since the Cretaceous. The overpressure is the main force for hydrocarbon migration and overpressure-related microfractures are the major pathways for gas migration. Fault transport and overpressure driving caused the formation of Jurassic secondary gas reservoirs with distant sources. The areas with high pressure coefficient in the Jurassic and high-overpressure zones in the Xujiahe Formation are optimum targets for exploration. Key words: abnormal pressure, under-compaction, hydrocarbon generated overpressure, tectonic compression, overpressure transmission, hydrocarbon accumulation, Western Sichuan Depression
url http://www.sciencedirect.com/science/article/pii/S1876380412600627
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AT xiongqipang evolutionofcontinentalformationpressureinthemiddlepartofthewesternsichuandepressionanditssignificanceonhydrocarbonaccumulation
AT dongxiachen evolutionofcontinentalformationpressureinthemiddlepartofthewesternsichuandepressionanditssignificanceonhydrocarbonaccumulation
AT jigaoleng evolutionofcontinentalformationpressureinthemiddlepartofthewesternsichuandepressionanditssignificanceonhydrocarbonaccumulation
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