石油与天然气地质 ›› 2014, Vol. 35 ›› Issue (4): 511-516.doi: 10.11743/ogg20140410

• 层序与储层 • 上一篇    下一篇

川东北元坝地区上二叠统长兴组超深层礁滩岩性气藏中裂缝特征

范小军1, 彭俊2, 李吉选1, 陈丹1, 李凤1, 邓金花1, 黄勇1, 缪志伟1   

  1. 1. 中国石化 勘探南方分公司 勘探研究院, 四川 成都 610041;
    2. 长江大学, 湖北 武汉 430100
  • 收稿日期:2013-04-11 修回日期:2014-05-14 出版日期:2014-08-08 发布日期:2014-08-28
  • 第一作者简介:范小军(1982-),男,硕士、工程师,石油地质。E-mail:york111888@126.com。
  • 基金项目:

    中石化重点项目“元坝地区长兴组和飞仙关组储层描述与预测”(P09024)。

Fracture characteristics of ultra-deep reef-bank lithologic gas reservoirs in the Upper Permian Changxing Formation in Yuanba area, Northeastern Sichuan Basin

Fan Xiaojun1, Peng Jun2, Li Jixuan1, Chen Dan1, Li Feng1, Deng Jinhua1, Huang Yong1, Miao Zhiwei1   

  1. 1. Exploration Research Institute, Southern Branch of SINOPEC, Chengdu, Sichuan 610041, China;
    2. Yangtze University, Wuhan, Hubei 430100, China
  • Received:2013-04-11 Revised:2014-05-14 Online:2014-08-08 Published:2014-08-28

摘要:

为明确川东北元坝长兴组礁滩储层裂缝特征,通过对多口井长兴组储层裂缝特征的精细刻画和构造、生烃、成岩、孔隙等演化作用的动静态研究指出,裂缝纵向上主要发育于长兴组二段,平面分布非均质性较强,各井区差异性较大,构造相对高部位的裂缝较发育;裂缝类型可细化为3大类、11小类,主要发育3期裂缝,同时建立了典型裂缝标准识别图版及分类评价指标体系;裂缝形成主要受构造、埋藏及溶蚀等作用控制。缝-孔动态配置则表现为裂缝与有效孔隙网状交错配置形成有效储集空间或构建网状立体输导体系,其中第二、第三期缝-孔配置较第一期更好,对储层储渗性能和产能有积极贡献作用。认为元坝长兴组西北部为油气有利富集区。

关键词: 礁滩储层, 裂缝特征, 长兴组, 元坝地区

Abstract:

In order to understand the fracture characteristics of reef-bank reservoir in the Changxing Formation in Yuanba area,northeastern Sichuan Basin,this paper finely described the fractures of the Changxing Formation in many wells,and also studied the tectonic evolution,hydrocarbon generation,diagenesis and the porosity evolution.Vertically,the fractures are mainly distributed in the 2nd Member of Changxing Formation.While laterally,they show strong heterogeneity in distribution,with heterogeneity being different in different blocks.Fractures are relatively well developed on structural high.The fractures can be divided into 3 types and 11 subtypes developed mainly in 3 stages.We established the classification evaluation index system and the standard identification chart of typical fractures.The formation of fractures is mainly controlled by the tectonic evolution,burial and dissolution.The dynamic fracture-pore assemblages of the 2nd and 3rd stages are better than that of the 1st stage.These assemblages form effective storage space or reticular carrier systems and make a positive contribution to the reservoir property and productivity.The comprehensive analysis indicates that the Changxing Formation in the northwestern Yuanba area is favorable for enrichment of oil/gas.

Key words: reef-bank reservoir, fracture characteristics, Changxing Formation, Yuanba area

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