Geological characteristics and development potential of transitional shale gas in the east margin of the Ordos Basin, NW China

被引：0

作者：

Kuang L. ^{[1
]}

Dong D. ^{[2
]}

He W. ^{[3
]}

Wen S. ^{[4
]}

Sun S. ^{[2
]}

Li S. ^{[4
]}

Qiu Z. ^{[2
]}

Liao X. ^{[5
]}

Li Y. ^{[6
]}

Wu J. ^{[2
]}

Zhang L. ^{[2
]}

Shi Z. ^{[2
]}

Guo W. ^{[2
]}

Zhang S. ^{[2
]}

机构：

[1] Science and Technology Management Department of China National Petroleum Corporation, Beijing

[2] PetroChina Research Institute of Petroleum Exploration & Development, Beijing

[3] China Petroleum Consulting Center, Beijing

[4] PetroChina Coalbed Methane Company Limited, Beijing

[5] China University of Petroleum, Beijing

[6] China University of Mining and Technology, Beijing

来源：

Dong, Dazhong (ddz@petrochina.com.cn) | 1600年 / Science Press卷 / 47期

关键词：

Collaborative production; Favorable area; Marine-continental transitional facies; Multi-layers; Ordos Basin; Permian Shanxi Formation; Shale gas;

D O I：

10.11698/PED.2020.03.01

中图分类号：

学科分类号：

摘要：

The shales in the 2nd Member of Shanxi Formation in the east margin of the Ordos Basin were deposited in a paralic environment during the Permian. Based on the recent breakthroughs in the shale gas exploration and theoretical understandings on the shale gas of the study area, with a comparison to marine shale gas in the Sichuan Basin and transitional shale gas in the U.S., this study presents the geological characteristics and development potential of transitional gas in the study area. The 2nd Member of the Shanxi Formation in the study area has four geological features: (1) stable sedimentary environment and widely distributed organic shale; (2) well developed micro and nano scale pore and fracture systems with good storage capacity; (3) high content of brittle minerals such as quartz, which is conducive to reservoir fracturing; and (4) moderate reservoir pressure and relatively high gas content. The 2nd Member of Shanxi Formation in the east margin of Ordos Basin is rich in shale gas resource. Three favorable zones, Yulin-Linxian, Shiloubei-Daning-Jixian, and Hancheng-Huangling are developed, with a total area of 1.28×104 km2 and resources between 1.8×1012 and 2.9×1012 m3, indicating a huge exploration potential. Tests of the 2nd Member of Shanxi Formation in vertical wells show that the section has stable gas production and high controlled reserves per well, good recoverability and fracability. The shale section has sufficient energy, stable production capacity, and good development prospects, as evidenced by systematic well testing. The east margin of the Ordos Basin has several shale layers in the Shanxi and Taiyuan formations, and several coal seams interbedded, so collaborative production of different types of natural gas in different layers can be considered. The study results can provide reference for shale gas exploration and development and promote the rapid exploitation of shale gas in China. © 2020, The Editorial Board of Petroleum Exploration and Development. All right reserved.

引用

页码：435 / 446

页数：11

共 38 条

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