IGGCAS OpenIR  > 新生代地质与环境院重点实验室
Diagenesis of microbialite-dominated carbonates in the Upper Ediacaran Qigebrak Formation, NW Tarim Basin, China: Implications for reservoir development
Tang, Pan1,2,3; Chen, Daizhao1,2,3; Wang, Yuanzheng1,2,3; Ding, Yi4; El-Shafeiy, Moataz1,5; Yang, Bo1,2,3
2022-02-01
Source PublicationMARINE AND PETROLEUM GEOLOGY
ISSN0264-8172
Volume136Pages:15
AbstractThe interests in deeply-buried hydrocarbon reservoirs increase rapidly with increasing performances into greater depths. The ancient Ediacaran Qigebrak Formation microbialites in Tarim Basin are widespread and increasingly considered as a potential hydrocarbon exploration target for deeply-buried carbonate reservoirs. However, controlling factors on the development of microbialite reservoirs have not well been understood yet. This work was conducted upon microbialites of the Qigebrak Formation, Aksu, NW Tarim Basin based on detailed petrological, geochemical, and petrophysical investigations, aiming at understanding the diagenetic processes and influences on the porosity generation and preservation. The investigated dolomicrobialites, encompass four distinctive lithofacies types: microbial laminite, stromatolite, spongiomicrobialite, and microbial-peloidal wackstone/packstone. The main diagenetic minerals consist of three types of dolomite (microbial dolomicrite, early-stage fibrous dolomite cement, and late-stage pore filling dolomite cement), quartz, calcite and bitumen fillings. Pore spaces are dominated by vugs, solution-enhanced pores, microbial framework pores, intercrystalline pores, micropores and fractures. Among all the microbialites, spongiomicrobialites have porosity averaging 6.15% and permeability averaging 0.20 mD, which show better petrophysical properties than other microbialites. This study pinpoints that the development of a high quality microbialite reservoir in the studied area was essentially controlled by three controlling factors: microbial mat deposition, early dolomitization, and meteoric karst leaching. Microbial mat deposits can be considered as the foundation to form framework pores. Furthermore, the early dolomitization increased the resistivity of the studied microbialites toward chemical and physical compaction, during which abundant micropores are generated. The meteoric karst dissolution, which is related to the uppermost Qigebrak Formation unconformity surface, is the crucial controlling factor that enhanced the porosity via forming a large quantity of vugs- and solution-related pores. This study attempts to better understand the microbialites diagenesis that may have affected the reservoir property, and to serve as an analog for the similar microbialite reservoirs in other areas of China.
KeywordDiagenesis Microbialites Pore systems Upper Ediacaran Reservoir development
DOI10.1016/j.marpetgeo.2021.105476
Funding OrganizationNational Key Research and Development (R & D) Program of China ; National Key Research and Development (R & D) Program of China ; National Key Research and Development (R & D) Program of China ; National Key Research and Development (R & D) Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research and Development (R & D) Program of China ; National Key Research and Development (R & D) Program of China ; National Key Research and Development (R & D) Program of China ; National Key Research and Development (R & D) Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research and Development (R & D) Program of China ; National Key Research and Development (R & D) Program of China ; National Key Research and Development (R & D) Program of China ; National Key Research and Development (R & D) Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research and Development (R & D) Program of China ; National Key Research and Development (R & D) Program of China ; National Key Research and Development (R & D) Program of China ; National Key Research and Development (R & D) Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
WOS KeywordTRIASSIC LEIKOUPO FORMATION ; FORMATION MECHANISM ; LOWER ORDOVICIAN ; SICHUAN BASIN ; EVOLUTION ; DOLOMITE ; POROSITY ; AREA ; GEOCHEMISTRY ; ENVIRONMENT
Language英语
Funding ProjectNational Key Research and Development (R & D) Program of China[2017YFC0603103] ; National Natural Science Foundation of China[U19B6003]
Funding OrganizationNational Key Research and Development (R & D) Program of China ; National Key Research and Development (R & D) Program of China ; National Key Research and Development (R & D) Program of China ; National Key Research and Development (R & D) Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research and Development (R & D) Program of China ; National Key Research and Development (R & D) Program of China ; National Key Research and Development (R & D) Program of China ; National Key Research and Development (R & D) Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research and Development (R & D) Program of China ; National Key Research and Development (R & D) Program of China ; National Key Research and Development (R & D) Program of China ; National Key Research and Development (R & D) Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research and Development (R & D) Program of China ; National Key Research and Development (R & D) Program of China ; National Key Research and Development (R & D) Program of China ; National Key Research and Development (R & D) Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
WOS Research AreaGeology
WOS SubjectGeosciences, Multidisciplinary
WOS IDWOS:000748860100002
PublisherELSEVIER SCI LTD
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Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/104012
Collection新生代地质与环境院重点实验室
Corresponding AuthorChen, Daizhao
Affiliation1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Cenozo Geol & Environm, Beijing 100029, Peoples R China
2.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing 100029, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Chengdu Univ Technol, State Key Lab Oil & Gas Reservoir Geol & Exploita, Chengdu 610059, Peoples R China
5.Cairo Univ, Fac Sci, Geol Dept, Giza, Egypt
First Author AffilicationKey Laboratory of Cenozoic Geology and Environment, Chinese Academy of Sciences
Corresponding Author AffilicationKey Laboratory of Cenozoic Geology and Environment, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Tang, Pan,Chen, Daizhao,Wang, Yuanzheng,et al. Diagenesis of microbialite-dominated carbonates in the Upper Ediacaran Qigebrak Formation, NW Tarim Basin, China: Implications for reservoir development[J]. MARINE AND PETROLEUM GEOLOGY,2022,136:15.
APA Tang, Pan,Chen, Daizhao,Wang, Yuanzheng,Ding, Yi,El-Shafeiy, Moataz,&Yang, Bo.(2022).Diagenesis of microbialite-dominated carbonates in the Upper Ediacaran Qigebrak Formation, NW Tarim Basin, China: Implications for reservoir development.MARINE AND PETROLEUM GEOLOGY,136,15.
MLA Tang, Pan,et al."Diagenesis of microbialite-dominated carbonates in the Upper Ediacaran Qigebrak Formation, NW Tarim Basin, China: Implications for reservoir development".MARINE AND PETROLEUM GEOLOGY 136(2022):15.
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