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Diagenetic Evolution of Wutonggou Reservoir in Southeastern Margin of Beisantai Swell, Junggar Basin(PDF)

《新疆石油地质》[ISSN:1001-3873/CN:65-1107/TE]

Issue:
2015年04期
Page:
409-
Research Field:
Publishing date:

Info

Title:
Diagenetic Evolution of Wutonggou Reservoir in Southeastern Margin of Beisantai Swell, Junggar Basin
Author(s):
LI Ling1 Delaqiati1 CHEN Chunyong2 TAN Qiang2 FENG Wei1
(1. College of Geology and Mining Engineering, Xinjiang University, Urumqi, Xinjiang830047, China;2.Zhundong Production Plant, Xinjiang Oilfield Company, PetroChina, Fukang, Xinjiang831500, China)
Keywords:
Junggar basin Beisantai swell Wutonggou formation diagenetic evolution reservoir clay mineral
PACS:
TE112.221
DOI:
10.7657/XJPG20150406
Abstract:
The Permian Wutonggou formation is an important target zone for petroleum exploration in Beisantai swell of Junggar basin, andtypical litho?stratigraphic reservoir has been found in it. Based on the analyses of core and sedimentary facies, combined with cast thin section, SEM, electron micro?probe and X?ray diffraction data, a systematic study of the diagenesis of the Wutonggou formation is presented in this paper. The Wutonggou reservoir underwent compaction, cementation and dissolution, and is in stage between early diagenetic period B and mid?diagenetic period A. The clay minerals in the study area are dominated by authigenic kaolinite and illite/smectite, and the acidic aqueous media and organic matter produce large amount of acid and CO2 during diagenesis, which create favorable conditions for detrital feldspar kaolinization. The rich volcanic debris and low geothermal gradient as well as low speed of smectite illitization are the major reasons for rich illite/smectite in the clay minerals

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Last Update: 2015-09-21