Title:

An Analysis of the Pressure Transient Testing of a Man-Made Fractured Geothermal Reservoir

Authors:

Henry N. Fisher, Jefferson W. Tester

Geo Location:

Fenton Hill, New Mexico; Valles Caldera, New Mexico

Conference:

Stanford Geothermal Workshop

Year:

1979

Session:

Pressure Transient Analysis

Language:

English

File Size:

756KB

View File:

Abstract:

Pressure-transient testing of a hydraulically fractured geothermal reservoir in low-permeability crystalline basement rock has involved constant rate injection and pressure buildup tests under a wide range of field conditions for a number of fractured regions. Following conventional reservoir analysis methods, data are treated in terms of a transient diffusion equation that relates fluid flow and pressure levels in the main fracture system, associated joints, and the matrix permeabilty. Pressureflow data are compared to type curve solutions of the diffusion equation for various flow geometries. The following points are considered in detail: 1) The limits on the fracture geometry, aperture and diffusin areas as determined from the diffusion parameters, 2) The parameters 4 flow impedance, diffusivity) of the flow-through systems are related to those governing the pressure inflation of the main fractures. 3) The relationship of the rock properties to the reservoir compressibility, effective porosity and permeability are discussed. In particular, laboratory experiments show that the flow properties of all sizes of cracks from large single fractures to the microstructure are pressure dependent if the fluid pressure is near the confining stress, 4) The competition of flow into the various types of porosity (main fractures, joints, and microstructure) and the effect on the interpretation of type curves are discussed.


ec2-18-206-13-112.compute-1.amazonaws.com, you have accessed 0 records today.

Press the Back button in your browser, or search again.

Copyright 1979, Stanford Geothermal Program: Readers who download papers from this site should honor the copyright of the original authors and may not copy or distribute the work further without the permission of the original publisher.


Attend the nwxt Stanford Geothermal Workshop, click here for details.

Accessed by: ec2-18-206-13-112.compute-1.amazonaws.com (18.206.13.112)
Accessed: Thursday 28th of March 2024 01:42:52 PM