scispace - formally typeset
Search or ask a question
Author

Ren-Shi Nie

Bio: Ren-Shi Nie is an academic researcher from Southwest Petroleum University. The author has contributed to research in topics: Flow (mathematics) & Geology. The author has an hindex of 7, co-authored 19 publications receiving 192 citations.

Papers
More filters
Journal ArticleDOI
TL;DR: In this article, the authors established a model of CBM horizontal well production and the partial differential equations were solved by the method of Laplace transform and obtained the standard log-log type curves of pressure transient and rate decline analysis using numerical simulation and analyzed the transient transport behavior thoroughly.

63 citations

Journal ArticleDOI
TL;DR: In this paper, the dual permeability flow issue for horizontal well production in a fractured-vuggy carbonate reservoir was investigated, and a test analysis model of a horizontal well was created, and triple porosity and dual-permeability flow behavior were modeled.

57 citations

Journal ArticleDOI
TL;DR: In this article, a new analytical model (enhanced five-region model) of MFHWs in shale gas reservoirs considering desorption, different models in stimulated reservoir volume (SRV) region, non-uniform distribution of fractures and stimulated or un-stimulated region, and distinct respective properties in each region.

33 citations

Journal ArticleDOI
TL;DR: In this article, an analytical three-dimensional solution for a point source located at an arbitrary position in the first circular region of a multi-region radial composite reservoir with three side boundary conditions is presented.

20 citations

Journal ArticleDOI
TL;DR: In this article, a novel integrated method was proposed to characterize the pore structure of a real tight sandstone reservoir in the Sulige gas field, which requires a comprehensive analysis of experimental results based on cast thin section (CTS), nuclear magnetic resonance (NMR), constant-rate mercury intrusion (CMI), and X-ray computed tomography (XCT) techniques.

17 citations


Cited by
More filters
Journal ArticleDOI
TL;DR: In this paper, it is shown that the micropores are where most methane adsorption occurs in coal seams, and the methane molecule may actually stretch, minutely, the pore and thus with de-gassing of the reservoir, could result in matrix shrinkage, allowing opening of the fracture (cleat) system in the coal and thus enhancing permeability.

1,160 citations

Journal ArticleDOI
TL;DR: In this paper, a composite model was proposed to investigate the pressure behavior and production performance of a multi-wing hydraulically fractured multiple fractured vertical well (MFVW) in a coalbed gas reservoir with a stimulated reservoir volume (SRV).

141 citations

Journal ArticleDOI
TL;DR: In this article, the influence of gas diffusion behavior on gas flow and permeability evolution in coal seams is evaluated, and the numerical results indicate that the effects of the gas diffusion behaviour and Klinkenberg behavior can have a critical influence on the gas pressure, residual gas content, and percolation evolution during the entire methane degasification period.
Abstract: The influence of gas diffusion behavior on gas flow and permeability evolution in coal seams is evaluated in this paper. Coalbed methane (CBM) reservoirs differ from conventional porous media and fractured gas reservoirs due to certain unique features, which lead to two distinct gas pressures: one in fractures and the other in the coal matrix. The latter pressure, also known as the sorption pressure, will be used in calculating sorption-based volume changes. The effective stress laws for single-porosity media is not suitable for CBM reservoirs, and the effective stress laws for multi-porosity media need to be applied. The realization of the above two points is based on the study of the two-phase state of gas migration (involving Fickian diffusion and Darcy flow) in a coal seam. Then, a general porosity and permeability model based on the P-M model is proposed to fit this phenomenon. Moreover, the Klinkenberg effect has been taken into account and set as a reference object. Finally, a coupled gas flow and coal deformation model is proposed and solved by using a finite element method. The numerical results indicate that the effects of gas diffusion behavior and Klinkenberg behavior can have a critical influence on the gas pressure, residual gas content, and permeability evolution during the entire methane degasification period, and the impacts of the two effects are of the same order of magnitude. Without considering the gas diffusion effect, the gas pressure and residual gas content will be underestimated, and the permeability will be overestimated.

126 citations

Journal ArticleDOI
TL;DR: In this article, the fractal curves of the pores and fractures in coal samples with different particle sizes determined from MIP were all divided into two parts by an inflection point.

91 citations

Journal ArticleDOI
TL;DR: In this paper, a semi-analytical dynamic drainage area (DDA) model is proposed to forecast coalbed methane (CBM) wells with low permeability, undersaturated coals.

63 citations