Progress of paleozoic coal-derived gas exploration in Ordos Basin, West China

被引：0

作者：

Yang, Hua ^{[1
,2
]}

Liu, Xinshe ^{[1
,2
]}

机构：

[1] PetroChina Changqing Oilfield Company

[2] National Eng. Lab. for Exploration and Development of Low-Permeability Oil and Gas Fields

来源：

Shiyou Kantan Yu Kaifa/Petroleum Exploration and Development | 2014年 / 41卷 / 02期

关键词：

Accumulation conditions; Carbonate gas reservoir; Coal-derived gas; Exploration progress; Ordos Basin; Paleozoic; Tight gas;

D O I：

10.11698/PED.2014.02.01

中图分类号：

学科分类号：

摘要：

Based on practices of gas exploration in the Ordos Basin, this paper analyzes the controlling factors of large-scale accumulation conditions and distribution characteristics of coal-derived gas, and concludes the exploration progress of coal-derived gas according to the present exploration situations. There are 5.24×1012 m3 proven coal-derived gas reserves in the Ordos Basin. Twelve coal-derived gas fields have been found, mainly distributed in the Upper Paleozoic Carboniferous-Permian clastic rocks and Lower Paleozoic Ordovician marine carbonate reservoirs. Tight sandstone gas reservoirs are developed in the Upper Paleozoic. The widely covered hydrocarbon source of coal stacks each other with large-scale sandstone reservoirs, the reservoirs tightened firstly and natural gas accumulated later, and natural gas migrated shortly and accumulated in a large area. The Sulige large gas field has been found with proven coal-derived gas reserves of 3.49×1012 m3, and two large-scale reserve replacements have been determined in the eastern part of the basin and the Longdong area. Marine carbonate gas pools are developed in the Lower Paleozoic. The gas generated from the overlying coal source rocks migrated downward and accumulated in the Ordovician weathering crust karst and dolomite reservoirs. The Jingbian gas field has been found with proven coal-derived gas reserves of 7000×108 m3, meanwhile, several gas-rich regions have also been found.

引用

页码：129 / 137

页数：8

共 34 条

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