Numerical Simulation of Coupled Fluid-Flow/Geomechanical Behavior of Tight Gas Reservoirs with Stress Sensitive Permeability
01 Jan 1997-
About: The article was published on 1997-01-01. It has received 24 citations till now. The article focuses on the topics: Tight gas & Permeability (earth sciences).
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TL;DR: In this article, the porosity and permeability of coal sample from No. 3 coal seam in Southern Qinshui Basin of China in net confining stress were measured in laboratory.
86 citations
TL;DR: In this article, a new approach to calculate liquid permeability reduction of stress sensitivity is presented, considering the effect of boundary layer and critical throat radius on the development of tight sandstone oil reservoirs.
59 citations
TL;DR: In this article, the authors performed a set of true triaxial fracturing experiments on six block samples with consideration of in situ conditions, aiming at simulating the propagation of hydraulic fractures in the coalbed methane (CBM) reservoir in the Changzhi field, southern Qinshui basin.
40 citations
TL;DR: In this paper, the relationship between the shale porosity and permeability and the effective stress were established, and the stress sensitivity of shale was analyzed. And the main factors affecting the shale reservoir stress sensitivity are related to the rock mineral composition and rock mechanical properties.
Abstract: Shale reservoirs are characterized by extremely low permeability and high clay content. To further study the stress sensitivity of a shale reservoir, the Lower Cambrian shale in north Guizhou was utilized. Through laboratory testing, the relationships between the shale porosity and permeability and the effective stress were established, and the stress sensitivity of shale was analysed. The mechanical properties and mineral composition of this shale were studied by rock mechanics testing and X-ray diffraction. The main factors affecting the stress sensitivity were analysed. The results show that the porosity and permeability of this shale decrease with increasing effective stress; the shale reservoir permeability damage rate is 61.44 ~ 73.93%, with an average of 69.92%; the permeability stress sensitivity coefficient is 0.04867 ~ 0.05485 MPa−1, with an average of 0.05312 MPa−1; and the shale reservoir stress sensitivity is strong. Shale stress sensitivity is related to the rock mineral composition and rock mechanical properties. The higher the clay content in the mineral composition, the lower the elastic modulus of shale, the higher the compressibility, and the greater the stress sensitivity coefficient.
20 citations
Cites background from "Numerical Simulation of Coupled Flu..."
...The definitions of the volume compression coefficient and pore compression coefficient of rock and their relations have been given explicitly, the concept of the pore compression coefficient and stress sensitivity coefficient have been introduced into reservoir engineering problems, and the effect of the deformation of the pore volume change and permeability has been analysed [24, 25]....
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09 Oct 2017
12 citations