Characterization and Spatial Distribution of Sand Group Architecture and Channel Types in Tight Gas Reservoirs: A Case Study From the Jurassic Shaximiao Formation of the Jinqiu Gas Field in the Central Sichuan Basin of China

There is an abundance of tight gas resources in narrow channel sand-bodies from the Jurassic Shaximiao Formation of the Jinqiu gas field in the central Sichuan Basin of China. The architecture of sand group in the study area is undefined, and the spatial distribution of channel sand-bodies is unclea...

Full description

Saved in:
Bibliographic Details
Main Authors: Guian Guo, Deyu Zhu, Xiaojuan Wang, Mingqiu Li, Xu Guan, Xiaoju Zhang, Changjiang Wu, Shaomin Zhang, Li Hu, Juan Zhao, Nan Li, Huiqiang Wang, Bohan Duan
Format: Article
Language:English
Published: Wiley 2025-01-01
Series:Geofluids
Online Access:http://dx.doi.org/10.1155/gfl/3626427
Tags: Add Tag
No Tags, Be the first to tag this record!
_version_ 1832586339196862464
author Guian Guo
Deyu Zhu
Xiaojuan Wang
Mingqiu Li
Xu Guan
Xiaoju Zhang
Changjiang Wu
Shaomin Zhang
Li Hu
Juan Zhao
Nan Li
Huiqiang Wang
Bohan Duan
author_facet Guian Guo
Deyu Zhu
Xiaojuan Wang
Mingqiu Li
Xu Guan
Xiaoju Zhang
Changjiang Wu
Shaomin Zhang
Li Hu
Juan Zhao
Nan Li
Huiqiang Wang
Bohan Duan
author_sort Guian Guo
collection DOAJ
description There is an abundance of tight gas resources in narrow channel sand-bodies from the Jurassic Shaximiao Formation of the Jinqiu gas field in the central Sichuan Basin of China. The architecture of sand group in the study area is undefined, and the spatial distribution of channel sand-bodies is unclear. The complex and inhomogeneous sandstones have a significant impact on the reservoir’s physical properties and the fluid mobility of the reservoir. In this study, data from drilling cores, logs, seismic, and experiment testing were used to investigate the spatial distribution of sand group architecture and the channel types. There are five channel genetic types, including the multiphase superimposed type, deeply incised type, abandoned type, progradational superimposed type, and normal single genetic type. Based on the channel genetic types, the ratio of sandstone and mudstone, the ratio of width to depth, the connectivity ratio of sand-bodies, and the production dynamic characteristics, the channel sand-body connectivity is defined into three types. The connected sand-bodies occur in the multiphase superimposed and deeply incised types of channels, with an average connectivity ratio of 83%, a ratio of sandstone and mudstone larger than 0.9, and a ratio of width and depth larger than 40. Based on the association of sandstone and mudstone and rhythmic structure, the sand group architecture can be divided into three types, including (A) uniform-grain-sequence pure sandstone architecture, (B) positive-grain-sequence thick sandstone and thin mudstone architecture, and (C) positive-grain-sequence thick mudstone and thin sandstone architecture. There is a high content of natural gas in Types A and B of sandstones, with a daily gas production of 29.16×104–47.6×104 m3/day and pressure coefficients of 0.72–1.08. The sand group architecture of the study area is mainly controlled by the channel sinuosity and the ratio of accommodation and sediment supply, and Types A and B of sand group architectures occur with large channel sinuosity of 1.14–1.36 and a large ratio of accommodation and sediment supply of 0.61–2.92. Based on the connectivity degree of channel sand-bodies, the sand group architectures, and production data, the channels of the study area can be divided into three types. Type I channels mainly occur in Sand Groups 6, 8, and 9, and Type II and Type III channels occur in Sand Groups 6 and 7 in the western and southern parts of the study area. The technology of fine characterization for channel sand-bodies on the basis of human–computer interaction and seismic attributes is proposed, and geological modelling of the spatial distribution of sand group architectures and channel types is established. The research results achieve a theoretical breakthrough in the characterization of the sand-body structure of tight sandstone reservoirs in narrow river channels and assist in the efficient exploration and development of tight sandstone gas.
format Article
id doaj-art-6a8455ace22d4329883bda47c588ac7e
institution Kabale University
issn 1468-8123
language English
publishDate 2025-01-01
publisher Wiley
record_format Article
series Geofluids
spelling doaj-art-6a8455ace22d4329883bda47c588ac7e2025-01-26T00:00:01ZengWileyGeofluids1468-81232025-01-01202510.1155/gfl/3626427Characterization and Spatial Distribution of Sand Group Architecture and Channel Types in Tight Gas Reservoirs: A Case Study From the Jurassic Shaximiao Formation of the Jinqiu Gas Field in the Central Sichuan Basin of ChinaGuian Guo0Deyu Zhu1Xiaojuan Wang2Mingqiu Li3Xu Guan4Xiaoju Zhang5Changjiang Wu6Shaomin Zhang7Li Hu8Juan Zhao9Nan Li10Huiqiang Wang11Bohan Duan12Southwest Oil and Gas Field CompanyExploration and Development Research InstituteExploration and Development Research InstituteExploration and Development Research InstituteExploration and Development Research InstituteCollege of Earth SciencesExploration and Development Research InstituteExploration and Development Research InstituteExploration and Development Research InstituteExploration and Development Research InstituteExploration and Development Research InstituteExploration and Development Research InstituteCollege of Earth SciencesThere is an abundance of tight gas resources in narrow channel sand-bodies from the Jurassic Shaximiao Formation of the Jinqiu gas field in the central Sichuan Basin of China. The architecture of sand group in the study area is undefined, and the spatial distribution of channel sand-bodies is unclear. The complex and inhomogeneous sandstones have a significant impact on the reservoir’s physical properties and the fluid mobility of the reservoir. In this study, data from drilling cores, logs, seismic, and experiment testing were used to investigate the spatial distribution of sand group architecture and the channel types. There are five channel genetic types, including the multiphase superimposed type, deeply incised type, abandoned type, progradational superimposed type, and normal single genetic type. Based on the channel genetic types, the ratio of sandstone and mudstone, the ratio of width to depth, the connectivity ratio of sand-bodies, and the production dynamic characteristics, the channel sand-body connectivity is defined into three types. The connected sand-bodies occur in the multiphase superimposed and deeply incised types of channels, with an average connectivity ratio of 83%, a ratio of sandstone and mudstone larger than 0.9, and a ratio of width and depth larger than 40. Based on the association of sandstone and mudstone and rhythmic structure, the sand group architecture can be divided into three types, including (A) uniform-grain-sequence pure sandstone architecture, (B) positive-grain-sequence thick sandstone and thin mudstone architecture, and (C) positive-grain-sequence thick mudstone and thin sandstone architecture. There is a high content of natural gas in Types A and B of sandstones, with a daily gas production of 29.16×104–47.6×104 m3/day and pressure coefficients of 0.72–1.08. The sand group architecture of the study area is mainly controlled by the channel sinuosity and the ratio of accommodation and sediment supply, and Types A and B of sand group architectures occur with large channel sinuosity of 1.14–1.36 and a large ratio of accommodation and sediment supply of 0.61–2.92. Based on the connectivity degree of channel sand-bodies, the sand group architectures, and production data, the channels of the study area can be divided into three types. Type I channels mainly occur in Sand Groups 6, 8, and 9, and Type II and Type III channels occur in Sand Groups 6 and 7 in the western and southern parts of the study area. The technology of fine characterization for channel sand-bodies on the basis of human–computer interaction and seismic attributes is proposed, and geological modelling of the spatial distribution of sand group architectures and channel types is established. The research results achieve a theoretical breakthrough in the characterization of the sand-body structure of tight sandstone reservoirs in narrow river channels and assist in the efficient exploration and development of tight sandstone gas.http://dx.doi.org/10.1155/gfl/3626427
spellingShingle Guian Guo
Deyu Zhu
Xiaojuan Wang
Mingqiu Li
Xu Guan
Xiaoju Zhang
Changjiang Wu
Shaomin Zhang
Li Hu
Juan Zhao
Nan Li
Huiqiang Wang
Bohan Duan
Characterization and Spatial Distribution of Sand Group Architecture and Channel Types in Tight Gas Reservoirs: A Case Study From the Jurassic Shaximiao Formation of the Jinqiu Gas Field in the Central Sichuan Basin of China
Geofluids
title Characterization and Spatial Distribution of Sand Group Architecture and Channel Types in Tight Gas Reservoirs: A Case Study From the Jurassic Shaximiao Formation of the Jinqiu Gas Field in the Central Sichuan Basin of China
title_full Characterization and Spatial Distribution of Sand Group Architecture and Channel Types in Tight Gas Reservoirs: A Case Study From the Jurassic Shaximiao Formation of the Jinqiu Gas Field in the Central Sichuan Basin of China
title_fullStr Characterization and Spatial Distribution of Sand Group Architecture and Channel Types in Tight Gas Reservoirs: A Case Study From the Jurassic Shaximiao Formation of the Jinqiu Gas Field in the Central Sichuan Basin of China
title_full_unstemmed Characterization and Spatial Distribution of Sand Group Architecture and Channel Types in Tight Gas Reservoirs: A Case Study From the Jurassic Shaximiao Formation of the Jinqiu Gas Field in the Central Sichuan Basin of China
title_short Characterization and Spatial Distribution of Sand Group Architecture and Channel Types in Tight Gas Reservoirs: A Case Study From the Jurassic Shaximiao Formation of the Jinqiu Gas Field in the Central Sichuan Basin of China
title_sort characterization and spatial distribution of sand group architecture and channel types in tight gas reservoirs a case study from the jurassic shaximiao formation of the jinqiu gas field in the central sichuan basin of china
url http://dx.doi.org/10.1155/gfl/3626427
work_keys_str_mv AT guianguo characterizationandspatialdistributionofsandgrouparchitectureandchanneltypesintightgasreservoirsacasestudyfromthejurassicshaximiaoformationofthejinqiugasfieldinthecentralsichuanbasinofchina
AT deyuzhu characterizationandspatialdistributionofsandgrouparchitectureandchanneltypesintightgasreservoirsacasestudyfromthejurassicshaximiaoformationofthejinqiugasfieldinthecentralsichuanbasinofchina
AT xiaojuanwang characterizationandspatialdistributionofsandgrouparchitectureandchanneltypesintightgasreservoirsacasestudyfromthejurassicshaximiaoformationofthejinqiugasfieldinthecentralsichuanbasinofchina
AT mingqiuli characterizationandspatialdistributionofsandgrouparchitectureandchanneltypesintightgasreservoirsacasestudyfromthejurassicshaximiaoformationofthejinqiugasfieldinthecentralsichuanbasinofchina
AT xuguan characterizationandspatialdistributionofsandgrouparchitectureandchanneltypesintightgasreservoirsacasestudyfromthejurassicshaximiaoformationofthejinqiugasfieldinthecentralsichuanbasinofchina
AT xiaojuzhang characterizationandspatialdistributionofsandgrouparchitectureandchanneltypesintightgasreservoirsacasestudyfromthejurassicshaximiaoformationofthejinqiugasfieldinthecentralsichuanbasinofchina
AT changjiangwu characterizationandspatialdistributionofsandgrouparchitectureandchanneltypesintightgasreservoirsacasestudyfromthejurassicshaximiaoformationofthejinqiugasfieldinthecentralsichuanbasinofchina
AT shaominzhang characterizationandspatialdistributionofsandgrouparchitectureandchanneltypesintightgasreservoirsacasestudyfromthejurassicshaximiaoformationofthejinqiugasfieldinthecentralsichuanbasinofchina
AT lihu characterizationandspatialdistributionofsandgrouparchitectureandchanneltypesintightgasreservoirsacasestudyfromthejurassicshaximiaoformationofthejinqiugasfieldinthecentralsichuanbasinofchina
AT juanzhao characterizationandspatialdistributionofsandgrouparchitectureandchanneltypesintightgasreservoirsacasestudyfromthejurassicshaximiaoformationofthejinqiugasfieldinthecentralsichuanbasinofchina
AT nanli characterizationandspatialdistributionofsandgrouparchitectureandchanneltypesintightgasreservoirsacasestudyfromthejurassicshaximiaoformationofthejinqiugasfieldinthecentralsichuanbasinofchina
AT huiqiangwang characterizationandspatialdistributionofsandgrouparchitectureandchanneltypesintightgasreservoirsacasestudyfromthejurassicshaximiaoformationofthejinqiugasfieldinthecentralsichuanbasinofchina
AT bohanduan characterizationandspatialdistributionofsandgrouparchitectureandchanneltypesintightgasreservoirsacasestudyfromthejurassicshaximiaoformationofthejinqiugasfieldinthecentralsichuanbasinofchina