气候变化领域集成服务门户(CCPortal): Diagenetic sequences of continuously deposited tight sandstones in various environments: A case study from upper Paleozoic sandstones in the Linxing area; eastern Ordos basin; China

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DOI	10.1306/03061918062
	Diagenetic sequences of continuously deposited tight sandstones in various environments: A case study from upper Paleozoic sandstones in the Linxing area; eastern Ordos basin; China
	Li Y.; Li Y.; Gao X.; Meng S.; Wu P.; Niu X.; Qiao P.; Elsworth D.
发表日期	2019
ISSN	0149-1423
起始页码	2757
结束页码	2783
卷号	103 期号:11
英文摘要	An integrated analysis of the petrographic characteristics and types and distribution of diagenetic alteration in the upper Paleozoic Benxi-Taiyuan, Shanxi, and Xiashihezi Formations provides insights into the controlling factors on variations in porosity and permeability in tight sandstones (85% of the sandstone samples display porosity values <10% and 90% of the samples exhibit permeability <1 md). Diagenetic alteration includes mesogenetic compaction, cementation by dolomite, ankerite, and quartz, dissolution of feldspar, and illitization of smectite. Eodiagenesis includes compaction, development of smectite, cementation by pore-filling quartz and disordered kaolinite, and precipitation of calcite and Fe-calcite. Chlorite and quartz preserve primary pores against damage, whereas kaolinite, illite-smectite (I/S) mixed layer, and illite significantly diminish reservoir quality via permeability reduction. Chlorite and I/S content decrease abruptly as depth increases, whereas the kaolinite content remains elevated at depth because of the complete destruction of K-feldspar. The transformation from smectite to illite provides silica ions for the widely distributed quartz overgrowths. As the depositional environment transformed from fluvial (Xiashihezi) to deltaic (Shanxi) and to epicontinental (Taiyuan and Benxi), the dissolution effect increased monotonically. Feldspar dissolution is dominant in the Shanxi Formation,whereas the Benxi and Taiyuan Formations commonly contain quartz dissolution pores. The Taiyuan Formation has markedly higher porosities than in the overlying and underlying formations, caused by strong dissolution and high silica content. The decrease in porosity in the Benxi Formation results from the extensive formation of clay minerals caused by high frequency transgressions in a transitional environment. © 2019 The American Association of Petroleum Geologists. All rights reserved.
语种	英语
scopus关键词	Calcite; Cementing (shafts); Compaction; Dissolution; Feldspar; Kaolinite; Metamorphic rocks; Petroleum reservoir engineering; Porosity; Quartz; Structural geology; Depositional environment; Diagenetic alteration; Feldspar dissolution; Integrated analysis; Ordos basin , China; Permeability reduction; Petrographic characteristics; Transitional environments; Sandstone; clay mineral; deposition; depositional environment; diagenesis; dissolution; illitization; Paleozoic; permeability; petrography; porosity; sandstone; sedimentary sequence; Benxi; China; Liaoning; Ordos Basin; Shanxi; Taiyuan
来源期刊	AAPG Bulletin
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/143754
作者单位	State Key Laboratory of Coal Resources and Safe Mining, College of Geosciences and Surveying Engineering, China University of Mining and Technology, Beijing, China; Shandong Provincial Key Laboratory of Depositional Mineralization and Sedimentary Minerals, Shandong University of Science and Technology, Qingdao, Shandong, China; China United Coalbed Methane Corp., Ltd., Beijing, China; Departments of Energy and Mineral Engineering and Geosciences, Earth and Mineral Sciences Energy Institute, Center for Geomechanics, Geofluids, and Geohazards (G3), Pennsylvania State University, University Park, State College, PA, United States
推荐引用方式 GB/T 7714	Li Y.,Li Y.,Gao X.,et al. Diagenetic sequences of continuously deposited tight sandstones in various environments: A case study from upper Paleozoic sandstones in the Linxing area; eastern Ordos basin; China[J],2019,103(11).
APA	Li Y..,Li Y..,Gao X..,Meng S..,Wu P..,...&Elsworth D..(2019).Diagenetic sequences of continuously deposited tight sandstones in various environments: A case study from upper Paleozoic sandstones in the Linxing area; eastern Ordos basin; China.AAPG Bulletin,103(11).
MLA	Li Y.,et al."Diagenetic sequences of continuously deposited tight sandstones in various environments: A case study from upper Paleozoic sandstones in the Linxing area; eastern Ordos basin; China".AAPG Bulletin 103.11(2019).