A study on the relationship between graptolites and shale gas enrichment in the Wufeng-Longmaxi Formations of the Middle-Upper Yangtze region in China

被引：3

作者：

Shi, Wenrui ^{[1
,2
]}

Wang, Xingzhi ^{[1
,2
]}

Wang, Ziyi ^{[3
]}

Shi, Yuanhui ^{[4
]}

Feng, Aiguo ^{[4
]}

Chen, Naidong ^{[5
]}

机构：

[1] Southwest Petr Univ, State Key Lab Oil & Gas Reservoir Geol & Exploita, Chengdu, Peoples R China

[2] Southwest Petr Univ, Sch Geocience & Technol, Chengdu, Peoples R China

[3] China Univ Geosci, Coll Energy, Beijing, Peoples R China

[4] Sinopec Oilfield Serv Jianghan Corp, Qianjiang, Peoples R China

[5] PetroChina, Tarim Oilfield Co, Res Inst Explorat & Dev, Sinkiang, Peoples R China

来源：

ARABIAN JOURNAL OF GEOSCIENCES | 2020年 / 13卷 / 12期

关键词：

Graptolite; Organic matter; Shale gas; Wufeng-Longmaxi Formations; Middle-Upper Yangtze region; ELECTRON-MICROPROBE; ORDOVICIAN; BASIN; PROVENANCE; CHEMISTRY; MACERALS; BLOCK;

D O I：

10.1007/s12517-020-05448-x

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Previous studies on graptolites have mainly focused on stratigraphic division and sedimentary environment analysis. On the basis of previous studies of Ordovician and Silurian graptolites in the Middle-Upper Yangtze region, this paper makes full use of core analysis, drilling geological, experimental analysis, and logging data from wells and combines graptolite types in different sedimentary environments to identify 4 graptolite zones, WF1-WF4, and 9 graptolite zones, LM1-LM9, in the Silurian Longmaxi Formation in the Middle-Upper Yangtze region, among which WF2-LM4 present high total organic carbon (TOC), organic pore development, and shale gas enrichment and are favorable development zones. This study reveals that enrichment in graptolites has positive correlations with TOC, organic porosity, and total hydrocarbon content. The evolution of graptolites has contributed to the enrichment in organic matter and the formation of organic pores in shales and affects shale gas-bearing properties to a certain extent, which is an important indicator for shale gas reservoir evaluation.

引用

页数：13

共 52 条

[1] Identification and nanoporosity of macerals in coal by scanning electron microscopy [J].

Cardott, Brian J. ;

Curtis, Mark E. .

INTERNATIONAL JOURNAL OF COAL GEOLOGY, 2018, 190 :205-217

[2] Late Ordovician to earliest Silurian graptolite and brachiopod biozonation from the Yangtze region, South China, with a global correlation [J].

Chen, X ;

Rong, JY ;

Mitchell, CE ;

Harper, DAT ;

Fan, JX ;

Zhan, RB ;

Zhang, YD ;

Li, RY ;

Wang, Y .

GEOLOGICAL MAGAZINE, 2000, 137 (06) :623-650

[3] The Global boundary Stratotype Section and Point (GSSP) for the base of the Hirnantian Stage (the uppermost of the Ordovician System) [J].

Chen, Xu ;

Rong, Jiayu ;

Fan, Junxuan ;

Zhan, Renbin ;

Mitchell, Charles E. ;

Harper, David A. T. ;

Melchin, Michael J. ;

Peng, Ping'an ;

Finney, Stan C. ;

Wang, Xiaofeng .

EPISODES, 2006, 29 (03) :183-196

[4]

[陈旭 Chen Xu], 2015, [地层学杂志, Journal of Stratigraphy], V39, P351

[5]

[戴娜 Dai Na], 2015, [电子显微学报, Journal of Chinese Electronic Microscopy Society], V34, P416

[6]

Gradstein FM, 2012, GEOLOGIC TIME SCALE 2012, VOLS 1 & 2, P1, DOI 10.1016/B978-0-444-59425-9.00001-9

[7] The Silurian Qusaiba Hot Shales of Saudi Arabia: An integrated assessment of thermal maturity [J].

Inan, Sedat ;

Goodarzi, Fariborz ;

Mumm, Andreas Schmidt ;

Arouri, Khaled ;

Qathami, Salman ;

Ardakani, Omid H. ;

Inan, Tulay ;

Tuwailib, Amer A. .

INTERNATIONAL JOURNAL OF COAL GEOLOGY, 2016, 159 :107-119

[8] Unconventional shale-gas systems: The Mississippian Barnett Shale of north-central Texas as one model for thermogenic shale-gas assessment [J].

Jarvie, Daniel M. ;

Hill, Ronald J. ;

Ruble, Tim E. ;

Pollastro, Richard M. .

AAPG BULLETIN, 2007, 91 (04) :475-499

[9]

Kang W., 2015, THESIS

[10]

KOZLOWSKI ROMAN, 1966, J PALEONTOL, V40, P489

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