油气藏评价与开发 ›› 2018, Vol. 8 ›› Issue (4): 68-72.

• 非常规油气 • 上一篇    下一篇

观音桥段地质特征及其对页岩气产量的影响——以南川地区为例

李佳欣   

  1. 中国石化华东油气分公司南川页岩气项目部,重庆 408400
  • 收稿日期:2018-03-19 发布日期:2018-11-28 出版日期:2018-08-26
  • 作者简介:李佳欣(1993—),男,助理工程师,地质勘探开发研究。

Geological features of Guanyinqiao member and its influence on the shale gas production: A case study of Nanchuan district

Li Jiaxin   

  1. Nanchuan Shale Gas Project Department, East China Oil and Gas Company, SINOPEC, Chongqing 408400, China
  • Received:2018-03-19 Online:2018-11-28 Published:2018-08-26

摘要:

渝东南地区观音桥段为一套赫南特期形成的介壳相泥质灰岩地层,海平面和古地貌控制是影响地层分布的主要因素。其上覆、下伏层均为深水沉积的黑色页岩,岩相上的改变表明沉积环境发生了一定的变化,且在平面上部分地区观音桥段发生缺失。通过对南川地区的观音桥段特征进行分析,结合该地区页岩气井各项静态评价指标及单井产能,研究南川地区的页岩气井产能与观音桥段的存在是否具有一定联系,而影响页岩气产量,其结论对渝东南地区页岩气选区提供地质依据,并对开发政策制定具有一定的指导意义。

关键词: 南川, 观音桥段, 页岩气, 选区

Abstract:

The guanyinqiao member in Southeast of Chongqing is a suit of argillaceous limestone formation formed in the Nantes period. The sea level and the control of ancient landform are the main factors affecting the strata. The strata overlying and underlying layer are both black shale formed in deep-water sedimentary environment. On the plane, Guanyinqiao member is distributed uniformly and missing in some parts. By analyzing the characteristics of Guanyinqiao member in Nanchuan area, and combined with the static evaluation indexes and single well productivity of the shale gas wells in this area, we analyzed that whether there was the relationship between the productivity of shale gas well and the existence of the member, thus affecting the shale gas production. The conclusion has geological guidance to the selected areas of shale gas in the Southeast of Chongqing, and great guiding significance on exploration strategy of shale gas.

Key words: Nanchuan district, Guanyinqiao member, shale gas, selected area

中图分类号: 

  • TE122