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Characteristics and Formation Mechanism of Jurassic Microcrystalline Quartz Coating in Qikou Sag(PDF)

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

Issue:
2018年05期
Page:
537-
Research Field:
Publishing date:

Info

Title:
Characteristics and Formation Mechanism of Jurassic Microcrystalline Quartz Coating in Qikou Sag
Author(s):
ZHANG Shunli1 LYU Zhengxiang1 XIONG Chenhao1 JI Ping2 QI Yumin3
(1.College of Energy, Chengdu University of Technology, Chengdu, Sichuan 610059, China; 2.No.1 Oil Production Plant, Xinjiang Oilfield Company, PetroChina, Karamay, Xinjiang 834000, China; 3.Bohai Experimental Center, Drilling and Mining Engineering Research Institute, CNOOC, Tianjin 300452, China)
Keywords:
Bohai Bay basin Qikou sag Jurassic sandstone reservoir microcrystalline quartz primary pore
PACS:
TE122.21
DOI:
10.7657/XJPG20180506
Abstract:
Authigenic microcrystalline quartz coating and quartz secondary overgrowth are the most important authigenic minerals in the Jurassic sandstones of the Qikou sag, Bohai Bay basin. Primary pores related to microcrystalline quartz are well developed in the reservoir with deep burial depth. Based on the analysis of thin section, SEM, cathode luminescence, electronic probe and X-ray diffraction, the paper studies the source, growth pattern and formation mechanism of microcrystalline quartz coating, protection of primary intergranular pores and inhibitory mechanism of quartz secondary overgrowth in the study area, and verifies the diagenetic evolution sequence of the authigenic microcrystalline quartz coating sandstone. The microcrystalline quartz formed in early time, grew parallel to host grains and could rotate arbitrarily along the C axis. The associated primary pores are well developed. The analysis of the genesis of the authigenic microcrystalline quartz coating and its diagenetic evolution sequence is of great significance for the research on forming mechanisms of high-quality deep and ultra-deep reservoirs and petroleum exploration and development in Bohai Bay basin

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Last Update: 2018-10-09