Genetic mechanism of reefal dolostones of the Changxing Formation in Yuanba area, northeastern Sichuan Basin

被引：0
作者：
Xu S. [1 ]
Li G. [2 ]
Zhang X. [1 ]
Wu Y. [1 ]
Jing X. [1 ]
Liu Y. [1 ]
机构：
[1] Exploration and Production Research Institute, Southwest Oil and Gas Company, SINOPEC, Chengdu, 610041, Sichuan
[2] State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Chengdu University of Technology, Chengdu, 610059, Sichuan
来源：
| 1600年 / Editorial Department of Oil and Gas Geology卷 / 38期
关键词：
Changxing Formation; Dolomitization; Genetic mechanism; Reefal dolostone; Sichuan Basin; Yuanba area;
D O I：
10.11743/ogg20170410
中图分类号：
学科分类号：
摘要：
Dolostones of the Upper Permian Changxing Formation are the major reservoir rock type of the bioherm gas pool in Yuanba area, Northeastern Sichuan Basin. The formation of the reefal dolostone reservoir in the Changxing Formation is principally influenced by both dolomitization and dissolution. In order to reveal the genetic mechanism of bioherm dolostone, core observation, petrographic and geochemical analyses were integrated to study different types of dolomites and their characteristics of the Changxing Formation dolostone and determine the types and stages of dolomitization of the dolostone reservoir. Four types of dolomitization were identified, including syngenetic evaporative dolomitization and seepage-reflux dolomitization under high salinity, shallow burial dolomitisation and hydrothermal dolomitization of early diagenesis. The three stages of dolomitization control the quality and distribution of the reefal dolostone reservoirs of the Changxing Formation in Yuanba area. © 2017, Editorial Office of Oil and Gas Geology. All right reserved.
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页码：729 / 740
页数：11
相关论文
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