Mechanism of coal measure gas accumulation under integrated control of "source reservoir-transport system": A case study from east margin of Ordos Basin

被引：0

作者：

Li Y. ^{[1
]}

Xu W. ^{[1
]}

Gao J. ^{[2
]}

Wu P. ^{[2
]}

Tao C. ^{[3
]}

Tian Y. ^{[1
]}

Li J. ^{[1
]}

Zhang Y. ^{[1
]}

机构：

[1] School of Geoscience and Surveying, China University of Mining and Technology, Beijing

[2] China United Coalbed Methane Ltd., Beijing

[3] School of Civil Engineering, Liaoning Petrochemical University, Fushun

来源：

Meitan Xuebao/Journal of the China Coal Society | 2021年 / 46卷 / 08期

关键词：

Coal measure unconventional natural gas; Inner source retention; Microfacies control reservoir; Ordos Basin; Outer source enrichment; Physical properties control reservoir; Transport system;

D O I：

10.13225/j.cnki.jccs.CB21.0765

中图分类号：

学科分类号：

摘要：

Coal measure gas resources are abundant. Systematical understanding on the mechanism of multiple unconventional natural gases accumulation in coal measures is the key for effective development of gas reserves. From the perspective of the time-space coupling of source rock, reservoir and transport system, this paper clarifies the key processes and controlling factors of coal measure hydrocarbon generation, migration and accumulation, builds the coal measure gas accu-mulation series, and enriches the coal measure gas reservoiring connotation. Stable source rock is the basis of coal measure gas accumulation. Sedimentary microfacies control the distribution of main reservoirs, and physical properties microscopically determine the effectiveness of reservoir. The comprehensive coal measure gas system is formed under the dynamic control of transport system. The transport system and the reservoir system are both influenced by structure, sedimen-tation and rock diagenesis. The hydrocarbon generation intensity and evolution directly affect gas migration and accumulation. The transformation of transport system is the key factor to define the accumulation of inside source kitchen retention and the outside source kitchen accumulation. Below the transfer interface of the transportation system, the micro-nano pore throat network developed in the coal measure source rock is the main gas storage system, and coal measure gases generally do not migrate or migrate in a short distance. Above the interface, sand bodies, fractures and faults can all play a role as the transport system, with gas migrating either nearby or by a long distance. Then, the comprehensive coal measure gas accumulation series, including in-situ retention type (e. g., coalbed methane and shale gas in the Taiyuan Formation and Shanxi Formation), the close source charging type (e. g., tight gas of in Shanxi Formation and the Xiashihezi Formation), and the near source adjustment type (e. g. tight gas of Shangshihezi and Shiqianfeng Formation and carbonate gas of Majiagou Formation), are proposed. Based on this, the enrichment law and exploration directions of coal measures on the North China platform are analyzed, providing support for the co-production of multi-gases in multi-layers within coal measures. © 2021, Editorial Office of Journal of China Coal Society. All right reserved.

引用

页码：2440 / 2453

页数：13

共 45 条

[1] QIN Yong, WU Jianguang, LI Guozhang, Et al., Progress in research and thinking on coal measures gas (CMG) paragenetic system based on paragenesis theory, Journal of China Coal Society, 45, 7, pp. 2513-2522, (2020)
[2] LI Yong, WANG Yanbin, MENG Shangzhi, Et al., Theoretical basis and prospect of coal measure unconventional natural gas co-production, Journal of China Coal Society, 45, 4, pp. 1406-1418, (2020)
[3] DU Jia, ZHU Guanghui, WU Luofei, Et al., Multi-series and quasi-continuous" tight gas accumulation pattern and giant gas field exploration practice in Linxing area, Natural Gas Industry, 41, 3, pp. 58-71, (2021)
[4] KUANG Lichun, DONG Dazhong, HE Wenyuan, Et al., Geological characteristics and development potential of transitional shale gas in the east margin of the Ordos Basin, NW China, Petroleum Exploration and Development, 47, 3, pp. 435-446, (2020)
[5] ZHONG Jianhua, LIU Chuang, WU Jianguang, Et al., Symbiotic accumulation characteristics of coal measure gas in Linxing Block, eastern Ordos Basin, Journal of China Coal Society, 43, 6, pp. 1517-1525, (2018)
[6] REN Zhanli, QI Kai, LIU Runchuan, Et al., Dynamic background of Early Cretaceous tectonic thermal events and its control on various mineral accumulations such as oil and gas in the Ordos Basin, Acta Petrologica Sinica, 36, 4, pp. 1213-1234, (2020)
[7] CHEN Anqing, CHEN Hongde, HOU Mingcai, Et al., Late Paleozoic sedimentary filling and gas accumulation in the North Ordos Basin, Journal of Earth Science, 37, S1, pp. 151-162, (2012)
[8] RAN Xinquan, FU Jinhua, WEI Xinshan, Et al., Evolution of the Ordovician top boundary and its relationship to reservoirs' development, Ordos Basin, Petroleum Exploration and Development, 37, S1, pp. 151-162, (2012)
[9] LI Y, XU W K, WU P, Et al., Dissolution versus cementation and its role in determining tight sandstone quality: A case study from the Upper Paleozoic in northeastern Ordos Basin, China, Journal of Natural Gas Science and Engineering, 78, (2020)
[10] SHAO Longyi, DONG Daxiao, LI Mingpei, Et al., Sequence-paleogeography and coal accumulation of the Carboniferous-Permian in the North China Basin, Journal of China Coal Society, 39, 8, pp. 1725-1734, (2014)

← 1 2 3 4 5 →