Types and characteristics of reefs of Permian Changxing Formation around Kaijiang-Liangping trough, eastern Sichuan Basin

  • LI Chuanliang ,
  • PENG Chaoyang ,
  • ZHU Suyang
Expand
  • 1. Research Institute of Exploration and Development, PetroChina Southwest Oil and Gas Field Company, Chengdu 610041, China; 2. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Chengdu University of Technology, Chengdu 610059, China; 3. Northeast Sichuan Gas Field, PetroChina
    Southwest Oil and Gas Field Company, Dazhou 635000, China

Online published: 2013-02-20

Abstract

Platform-edge reef flat facies is the most important oil and gas exploration layer of Changxing Formation around Kaijiang-Liangping trough, eastern Sichuan Basin. The lithology of the reservoir is mainly reef flat facies crystal dolomites, and it has the characteristics of broad distribution areas, great thickness and fine physical properties. Through the observation of outcrop, core and thin section, this paper studied the internal structures and development characteristics of platform-edge reefs in the study area. The result shows that the platform-edge reefs have very different sedimentary characteristics in different places near the trough, and could be divided into patch reefs and mound reefs according to the development scales. Because of the different palaeogeomorphology and sea-level change,the patch reefs and mound reefs possess different evolution stages and reservoir characteristics. The patch reefs developed with the characteristics of shorter formation time, thinner reservoir thickness and poor properties, while the mound reefs mainly developed with the characteristics of larger formation time, thicker reservoir thickness and fine properties. Platform-edge reefs reservoir belongs to low porosity and low permeability reservoir. As a kind of the platform edge reefs, the mound reefs reservoir is better than that of patch reefs, and the patch reefs reservoir developed in the second period of Changxing Formation is better than patch reefs reservoir developed in the first period of Changxing Formation.

Cite this article

LI Chuanliang , PENG Chaoyang , ZHU Suyang . Types and characteristics of reefs of Permian Changxing Formation around Kaijiang-Liangping trough, eastern Sichuan Basin[J]. Lithologic Reservoirs, 2013 , 25(1) : 81 -87 . DOI: 10.3969/j.issn.1673-8926.2013.01.016

References

[1] 王一刚,文应初,张帆,等.川东地区上二叠统长兴组生物礁分布规律[J].天然气工业,1998,18(6):10-15.
[2] 郑荣才,胡忠贵,冯青平,等.川东北地区长兴组白云岩储层的成因研究[J].矿物岩石,2007,27(4):78-84.
[3] 洪海涛,王一刚,杨天泉,等.川北地区长兴组沉积相和生物礁气藏分布规律[J].天然气工业,2008,28(1):38-41.
[4] 张延充,杨爱国,梅燕,等.泛开江—梁平海槽及勘探有利相带地震预测[J].天然气工业,2009,29(10):28-30.
[5] 李登华,唐跃,殷积峰,等.川东黄龙场构造上二叠统长兴组生物礁特征与潜伏礁预测[J].中国地质,2006,33(2):427-435.
[6] 周刚,郑荣才,王炯,等.川东—渝北地区长兴组礁、滩相储层预测[J].岩性油气藏,2009,21(1):15-21.
[7] 文华国,郑荣才,党录瑞,等.四川盆地东部五百梯地区长兴组礁、滩相储层特征[J].岩性油气藏,2010,22(2):24-29.
[8] 赵文光,郭彤楼,蔡忠贤,等.川东北地区二叠系长兴组生物礁类型及控制因素[J].现代地质,2010,24(5):951-956.
[9] 李国军,郑荣才,唐玉林,等.川东北地区飞仙关组层序-岩相古地理特征[J].岩性油气藏,2007,19(4):64-70.
[10] 张继庆,李汝宁,官举铭,等.四川盆地及邻区晚二叠世生物礁[M].成都:四川科学技术出版社,1990.
[11] 库兹涅佐夫B R.礁地质学及礁的含油气性[M].李建温,译.北京:石油工业出版社,1978.
[12] 殷鸿福,童金南,丁梅华,等.扬子区晚二叠世—中三叠世海平面变化[J].地球科学———中国地质大学学报,1994,19(5):627-632.
[13] 陈中强.二叠纪末期的全球淹没事件[J].岩相古地理,1995,15(3):34-39.
[14] 周刚,郑荣才,罗平,等.川东华蓥二叠系—三叠系界线地层地质事件与元素地球化学响应[J].地球科学———中国地质大学学报,2012,37(增刊):101-110.
Outlines

/