石油学报 ›› 2011, Vol. 32 ›› Issue (5): 866-871.DOI: 10.7623/syxb201105020

• 油田开发 • 上一篇    下一篇

天然气水合物储层物理模型

张卫东 1  王瑞和 1  任韶然 1  马庆涛 2  李  洋 1   

  1. 1中国石油大学石油工程学院  山东东营  257061; 2中国石化胜利油田钻井工艺研究院  山东东营  257000
  • 收稿日期:2010-12-22 修回日期:2011-05-09 出版日期:2011-09-25 发布日期:2011-11-28
  • 通讯作者: 张卫东
  • 作者简介:张卫东,男,1968年9月生,2009年获中国石油大学(华东)油气井工程博士学位,现为中国石油大学(华东)副教授,主要从事天然气水合物钻采技术和岩石力学等方面的教学与科研工作。
  • 基金资助:

    中国石油化工集团公司“天然气水合物钻探与开发技术基础研究”项目(P06070)资助。

A study on physical models of gas hydrate reservoirs

ZHANG Weidong 1  WANG Ruihe 1  REN Shaoran 1  MA Qingtao 2  LI Yang 1   

  • Received:2010-12-22 Revised:2011-05-09 Online:2011-09-25 Published:2011-11-28

摘要:

通过不同成矿模式下海底天然气水合物储层微结构的研究,分析了水合物储层各种微结构的特点,建立了接触胶结模式、颗粒包裹模式、骨架颗粒支撑模式、孔隙填充模式和掺杂模式等5种均质储层的微结构物理模型,定量分析了储层波速和泊松比随水合物饱和度的变化关系,得到了不同微结构下水合物储层力学性质的变化规律,并分析了各种微结构的力学机理。根据所建物理模型对不同成矿模式下水合物储层的微结构进行声波诊断和泊松比诊断,并通过模拟储层和真实储层的资料数据对以上诊断模式进行了验证。

关键词: 天然气水合物储层, 微结构, 饱和度, 泊松比, 物理模型

Abstract:

By studying microstructures of undersea natural gas hydrate reservoirs in different mineralizaton modes, we analyzed characteristics of various hydrate microstructures and established five different microstructure physical models of homogeneous reservoirs, including contact cementation mode, particle-enfolded mode, skeleton particle support mode, pore-filled mode and doping model. At the same time, the wave velocity of reservoirs and a correlation of the Poisson ratio with the variance of hydrate saturation were quantitatively analyzed so as to obtain variation rules of mechanical properties of hydrate reservoirs with various microstructures as well as to analyze dynamical mechanisms of these microstructures. The acoustic diagnosis and Poisson ratio diagnosis of hydrate reservoir microstructures in different mineralizaton modes were carried out based on established physical models, and these diagnostic modes were also verified by comparing data of modeled reservoirs and real reservoirs.

Key words: gas hydrate reservoir, microstructure, saturation, Poisson ratio, physical model