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天然气地球科学

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低渗致密砂岩气藏提高采收率实验研究

胡勇，李熙喆，李跃刚，徐轩，王继平，焦春燕，郭长敏   

  1. 1.东北石油大学，黑龙江 大庆 163318；
    2.中国石油勘探开发研究院廊坊分院，河北 廊坊 065007；
    3.中国石油天然气集团公司天然气成藏与开发重点实验室，河北 廊坊 065007；
    4.中国石油长庆油田公司苏里格气田研究中心，陕西 西安 710021
  • 收稿日期:2015-03-02 修回日期:2015-06-21 出版日期:2015-11-10 发布日期:2015-11-10
  • 作者简介:胡勇(1978-)，男，重庆人，高级工程师，在读博士，主要从事石油天然气开发与实验研究. E-mail： huy69@petrochina.com.cn.
  • 基金资助:

    国家科技重大专项“致密砂岩气有效开发评价技术”(编号：2011ZX05013-002)资助.

Enhanced Gas Recovery of the Low Permeability and Tight Sandstone Gas Reservoir

HU Yong，LI Xi-zhe，LI Yue-gang，XU Xuan，WANG Ji-ping，JIAO Chun-yan，GUO Chang-min   

  1. 1.Northeast Petroleum University,Daqing 163318,China;
    2.Langfang Branch,Research Institute of Petroleum Exploration and Development,PetroChina,Langfang 065007,China；
    3.The Key Laboratory of Gas Reservoir Formation and Development,PetroChina,Langfang 065007,China；
    4.Reacher Center of Sulige Gasfield,Changqing Oilfield Company,PetroChina,Xi′an 710021,China
  • Received:2015-03-02 Revised:2015-06-21 Online:2015-11-10 Published:2015-11-10

PDF (PC)

436

摘要：

针对我国典型的低渗致密砂岩气藏，通过大量岩心实验和露头剖面精细取心测试分析，研究了应力作用对储层渗透率的影响、储层非均质性以及储层含水饱和度等特征，选用有代表性的岩心，开展了系统的单相气体渗流，含水条件下的气相渗流以及气、水两相渗流实验，分析了低渗致密砂岩储层单相气体渗流形态，含水饱和度变化对气相渗流能力的影响以及气、水两相渗流特征；在此基础上，采用气藏开发物理模拟实验技术，模拟研究了气藏衰竭开采过程中储层渗透率、含水条件、配产与废弃条件、纵向储层渗透率差异、平面非均质(储层砂体间存在阻流带)等多种因素对低渗致密砂岩气藏采收率的影响，根据权重分析对这5类影响因素进行了排序，结果表明储层物性和储层含水饱和度对采收率的影响最大，权重分别占到0.24和0.38，为进一步提高气藏采收率奠定了基础。

关键词: 低渗致密, 砂岩气藏, 提高采收率, 影响因素, 物理模拟

Abstract:

The effect of stress on the reservoir permeability and the features of reservoir heterogeneity and formation water saturation were analyzed by means of a huge number of core experiments and test analyses of outcrop section fine coring in the typical low permeability tight sandstone gas reservoirs.With some representative samples,we analyzed the single-phase gas seepage state of low permeability sandstone reservoir,the impact of water saturation on gas permeability and gas water two phase percolation characteristics by conducting systematically single-phase gas seepage experiments,gas percolation experiments under aquiferous condition and seepage tests of gas-water two-phase.On this basis,we studied the impact of various factors such as reservoir permeability,aquiferous conditions,proration and abandoned conditions,longitudinal reservoir permeability differences and the lateral heterogeneity-blocking zone between reservoir sand bodies on the recovery efficiency of low permeability tight sandstone gas reservoir in the process of depletion-drive development by using the physical simulation experimental techniques for gas reservoir development.Then,these five kinds of factors were sorted according to the weight analysis.The results show that reservoir property and reservoir water saturation have the largest effect on the recovery efficiency,whose weight accounted for 0.24 and 0.38,respectively.This study laid a solid foundation for further improving gas reservoir recovery efficiency.

Key words: The low permeability, Tight, Sandstone gas reservoir, Enhance gas recovery, Influence factor, Physical simulation

中图分类号: 

  • TE37

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