Karst paleogeomorphology of the fourth Member of Sinian Dengying Formation in Gaoshiti-Moxi area, Sichuan Basin, SW China: Restoration and geological significance

Based on 3-D seismic data and drill-hole data in Moxi-Gaoshiti area, the impression seismic thickness from the top of Longwangmiao Formation, which is easier traced, to the bottom of Cambrian System was selected to characterize the karst paleogeomorphology of the fourth Member of Dengying Formation....

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Main Authors: Mindong JIN, Xiucheng TAN, Mingsheng TONG, Wei ZENG, Hong LIU, Bo ZHONG, Qingsong LIU, Chengbo LIAN, Xinghe ZHOU, Hu XU, Bing LUO
Format: Article
Language:English
Published: KeAi Communications Co., Ltd. 2017-02-01
Series:Petroleum Exploration and Development
Online Access:http://www.sciencedirect.com/science/article/pii/S1876380417300083
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author Mindong JIN
Xiucheng TAN
Mingsheng TONG
Wei ZENG
Hong LIU
Bo ZHONG
Qingsong LIU
Chengbo LIAN
Xinghe ZHOU
Hu XU
Bing LUO
spellingShingle Mindong JIN
Xiucheng TAN
Mingsheng TONG
Wei ZENG
Hong LIU
Bo ZHONG
Qingsong LIU
Chengbo LIAN
Xinghe ZHOU
Hu XU
Bing LUO
Karst paleogeomorphology of the fourth Member of Sinian Dengying Formation in Gaoshiti-Moxi area, Sichuan Basin, SW China: Restoration and geological significance
Petroleum Exploration and Development
author_facet Mindong JIN
Xiucheng TAN
Mingsheng TONG
Wei ZENG
Hong LIU
Bo ZHONG
Qingsong LIU
Chengbo LIAN
Xinghe ZHOU
Hu XU
Bing LUO
author_sort Mindong JIN
title Karst paleogeomorphology of the fourth Member of Sinian Dengying Formation in Gaoshiti-Moxi area, Sichuan Basin, SW China: Restoration and geological significance
title_short Karst paleogeomorphology of the fourth Member of Sinian Dengying Formation in Gaoshiti-Moxi area, Sichuan Basin, SW China: Restoration and geological significance
title_full Karst paleogeomorphology of the fourth Member of Sinian Dengying Formation in Gaoshiti-Moxi area, Sichuan Basin, SW China: Restoration and geological significance
title_fullStr Karst paleogeomorphology of the fourth Member of Sinian Dengying Formation in Gaoshiti-Moxi area, Sichuan Basin, SW China: Restoration and geological significance
title_full_unstemmed Karst paleogeomorphology of the fourth Member of Sinian Dengying Formation in Gaoshiti-Moxi area, Sichuan Basin, SW China: Restoration and geological significance
title_sort karst paleogeomorphology of the fourth member of sinian dengying formation in gaoshiti-moxi area, sichuan basin, sw china: restoration and geological significance
publisher KeAi Communications Co., Ltd.
series Petroleum Exploration and Development
issn 1876-3804
publishDate 2017-02-01
description Based on 3-D seismic data and drill-hole data in Moxi-Gaoshiti area, the impression seismic thickness from the top of Longwangmiao Formation, which is easier traced, to the bottom of Cambrian System was selected to characterize the karst paleogeomorphology of the fourth Member of Dengying Formation. The paleogeomorphology of the member can be further divided into three geomorphic units: karst platform, slope and superimposed slope, which had different paleohydrologic conditions, and thus different karstification intensity and reservoir quality. Among them, the superimposed slope with the strongest dissolution, has larger solution groove and cave systems, where the reservoirs with mainly honeycombed dissolved pores and cavities as storage space, are best in quality; the platform slope with weaker dissolution, has smaller solution groove and cave systems, where the reservoirs are poorer than those in the superimposed slope; the karst platform with the weakest dissolution, has piebald karst systems mainly, where the reservoirs with mainly pinhole to smaller dissolved pores and cavities as storage space, are poorer in quality on the whole, but there are some good quality reservoir bodies in local areas. The results show that, besides the highly explored scarp belt, the slope in the intra-platform with low exploration degree can also be favorable exploration area of the fourth member of Dengying Formation. Key words: paleogeomorphology, karst platform, slope, superimposed slope, Cambrian Longwangmiao Formation, Sinian Dengying Formation, Moxi-Gaoshiti area, Sichuan Basin
url http://www.sciencedirect.com/science/article/pii/S1876380417300083
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spelling doaj-75b864662a944aaca590584c47c2c7402021-02-02T08:26:53ZengKeAi Communications Co., Ltd.Petroleum Exploration and Development1876-38042017-02-014415868Karst paleogeomorphology of the fourth Member of Sinian Dengying Formation in Gaoshiti-Moxi area, Sichuan Basin, SW China: Restoration and geological significanceMindong JIN0Xiucheng TAN1Mingsheng TONG2Wei ZENG3Hong LIU4Bo ZHONG5Qingsong LIU6Chengbo LIAN7Xinghe ZHOU8Hu XU9Bing LUO10Southwest Petroleum University, Chengdu 610500, China; Key Laboratory of Natural Gas Geology, Southwest Petroleum University, Chengdu 610500, China; The Sedimentary and Accumulation Department of Key Laboratory of Carbonate Reservoirs, PetroChina, Southwest Petroleum University, Chengdu 610500, ChinaSouthwest Petroleum University, Chengdu 610500, China; Key Laboratory of Natural Gas Geology, Southwest Petroleum University, Chengdu 610500, China; The Sedimentary and Accumulation Department of Key Laboratory of Carbonate Reservoirs, PetroChina, Southwest Petroleum University, Chengdu 610500, China; Corresponding authorGeological Exploration and Development Research Institute, Chuanqing Drilling Engineering Company Ltd, Chengdu 610041, ChinaSouthwest Petroleum University, Chengdu 610500, China; Key Laboratory of Natural Gas Geology, Southwest Petroleum University, Chengdu 610500, China; The Sedimentary and Accumulation Department of Key Laboratory of Carbonate Reservoirs, PetroChina, Southwest Petroleum University, Chengdu 610500, ChinaThe Sedimentary and Accumulation Department of Key Laboratory of Carbonate Reservoirs, PetroChina, Southwest Petroleum University, Chengdu 610500, ChinaExploration Division of PetroChina Southwest Oil and Gas Field Company, Chengdu 610041, ChinaExploration Division of PetroChina Southwest Oil and Gas Field Company, Chengdu 610041, ChinaSouthwest Petroleum University, Chengdu 610500, China; Key Laboratory of Natural Gas Geology, Southwest Petroleum University, Chengdu 610500, China; The Sedimentary and Accumulation Department of Key Laboratory of Carbonate Reservoirs, PetroChina, Southwest Petroleum University, Chengdu 610500, ChinaExploration Division of PetroChina Southwest Oil and Gas Field Company, Chengdu 610041, ChinaExploration Division of PetroChina Southwest Oil and Gas Field Company, Chengdu 610041, ChinaResearch Institute of Petroleum Exploration and Development, Southwest Oil and Gas Field Company, PetroChina, Chengdu 610041, ChinaBased on 3-D seismic data and drill-hole data in Moxi-Gaoshiti area, the impression seismic thickness from the top of Longwangmiao Formation, which is easier traced, to the bottom of Cambrian System was selected to characterize the karst paleogeomorphology of the fourth Member of Dengying Formation. The paleogeomorphology of the member can be further divided into three geomorphic units: karst platform, slope and superimposed slope, which had different paleohydrologic conditions, and thus different karstification intensity and reservoir quality. Among them, the superimposed slope with the strongest dissolution, has larger solution groove and cave systems, where the reservoirs with mainly honeycombed dissolved pores and cavities as storage space, are best in quality; the platform slope with weaker dissolution, has smaller solution groove and cave systems, where the reservoirs are poorer than those in the superimposed slope; the karst platform with the weakest dissolution, has piebald karst systems mainly, where the reservoirs with mainly pinhole to smaller dissolved pores and cavities as storage space, are poorer in quality on the whole, but there are some good quality reservoir bodies in local areas. The results show that, besides the highly explored scarp belt, the slope in the intra-platform with low exploration degree can also be favorable exploration area of the fourth member of Dengying Formation. Key words: paleogeomorphology, karst platform, slope, superimposed slope, Cambrian Longwangmiao Formation, Sinian Dengying Formation, Moxi-Gaoshiti area, Sichuan Basinhttp://www.sciencedirect.com/science/article/pii/S1876380417300083