摘要
分析煤层气井水力压裂时裂缝的典型类型与形状，建立水平缝与垂直缝的判别方法，推导由水平缝向垂直缝转变的临界深度计算公式。描述几种常见裂缝的形状和相应的形成条件，从断裂力学基本原理出发，分别推导在一定注入泵量和注入时间下，３种二维模型裂缝几何尺寸的基本计算公式。为水力压裂开采煤层气提供重要理论依据。
In this paper, the representative types and shapes of hydraulic fractures in seam are analyzed; an identification method of both the horizontal and vertical fractures is presented, a mathematical formula is derived for the calculation of the depth at which a horizontal fracture is transformed into a vertical one, and several fracture shapes and their corresponding formation conditions are then described. The basic mathematical formulas are derived, from the point of view of the fracturing mechanics principle, for the three kinds of 2-D models in terms of fracture geometrical sizes at a certain pumping volume and time . The present paper presents an important theoretical basis for the extraction of coal seam methane by means of hydranlic fracturing.
出处
《地球科学（中国地质大学学报）》
EI
CAS
CSCD
北大核心
1995年第1期112-116,共5页
Earth Science-Journal of China University of Geosciences
基金
国家八五科技攻关项目煤层气井水力压裂设计软件研究"的部分内容
