西南石油大学学报(自然科学版) ›› 2011, Vol. 33 ›› Issue (2): 35-42.

• 地质勘探 • 上一篇    下一篇

四川盆地须二段储层孔隙演化定量描述

段新国1a, 1b 李爽1c 宋荣彩1a 李国辉2 李楠2   

  1. 1. 成都理工大学:a. 沉积地质研究院,b. 能源学院,c. 地球科学学院,四川 成都610059;2. 中国石油西南油气田分公司勘探开发研究院,四川 成都 618000
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2011-04-20 发布日期:2011-04-20

GEOLOGICAL REGIONAL SELECTION AND AN EVALUATION METHOD OF RESOUR-CE POTENTIAL OF SHALE GAS

LI Yan-Jun 1,2 LIU Huan 2 LIU Jia-Xia 2 CAO Li-Chun 2 JIA Xue-Cheng 2   

  1. 1. State Key Laboratory of Oil and gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, SiChuan 610500, China; 2. School of Resourses and Environment, Southwest Petroleum University, Chengdu, Sichuan 610500, China
  • Received:1900-01-01 Revised:1900-01-01 Online:2011-04-20 Published:2011-04-20

摘要: 我国低渗透气藏产气量在天然气总产量中所占比例越来越大,研究低渗透气藏的形成机理及形成过程是非常必要的。四川盆地上三叠统须家河组二段是重要的含气层位,但由于其储层具有非均质性强、且具低孔低渗的特点,不仅储层预测难度大,而且开发的效果也差。因此需要研究其形成过程,提高储层预测精度以改善开发效果。以储层岩石学特征、孔隙类型及分布特征、胶结物充填次序及充填时间等研究为基础,定时、定量地研究孔隙的整个演化历史,描
述了孔隙在不同历史阶段的大小及变化原因,从而再现了储层形成历史,为下一步须二段气藏有效储层的预测与有效开发打下基础。

关键词: 须二段储层, 低孔低渗储层, 孔隙类型, 孔隙演化, 定量描述, 四川盆地

Abstract: With the quickening step of China’s shale gas exploration and development, the establishment of evaluation criteria of shale gas and the evaluation method of specific geological constituencies has become the prerequisite
and foundation of exploration and development. The optimization of favorable area can provide an important basis for further decision-making of the exploration and further study. According to a large number of foreign shale gas exploration and development cases, the main geological characteristics of shale gas are summarized. Based on the shale gas development practice of foreign countries, geological and geochemical parameters and the specific geo-
logical conditions of domestic basins, six evaluating parameters for selecting favorable shale gas area are optimized according to their generating capacities, storage capacities and easy exploitations. At the same time, the evaluating
index is defined, and the grading standards are established. Meanwhile, a simulation of the application of the evalu-
ation method in selecting the favorable geological zones has been carried out in a certain region of a basin. Finally,
the common quantitative calculation methods of shale gas potential are summarized systematically. Considering the
complex geological backgrounds of China and the status that shale gas is less explored and developed, the analogy
method and volume method are recommended to be used comprehensively to calculate the resources.

Key words: shale gas, geological regional selection, shale gas resources volume, shale gas evaluating index, shale gas evaluating criteria

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