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Advances in Geo-Energy Research 2017, 1(2): 105-111 https://doi.org/10.26804/ager.2017.02.06
Original Article | Open Access | Issue | Published: 25 September 2017

The new method on gas-water two phase steady-state productivity of fractured horizontal well in tight gas reservoir

Show Author's Information Xucheng Li1,  Jing Liang1( ),  Weichong Xu2,  Xiaoping Li2,  Xiaohua Tan2( )
PetroChina Southwest Oil & Gasfield Company, Chengdu 610041, P. R. China
State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, P. R. China
Keywords:
fracture, Tight gas, horizontal, gas-water two phase, steady-state productivity.
Cite this article:
Li X, Liang J, Xu W, et al. The new method on gas-water two phase steady-state productivity of fractured horizontal well in tight gas reservoir. Advances in Geo-Energy Research, 2017, 1(2): 105-111. https://doi.org/10.26804/ager.2017.02.06
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Abstract Full text About this article

Based on a large number of tight gas exploration and development literature researches, it is found that the horizontal drilling technology and fracturing operation are usually used in the tight gas reservoir for its low permeability. Three tasks have been done in this paper. First, we described the characteristics and the flow mechanism of the tight gas reservoirs which are different from the conventional ones and gave a new definition of two phase pseudo pressure. Second, formation stress sensitivity, starting pressure gradient and the interaction of fractures are considered. Equivalent flow resistance was used to establish a model of tight gas steady flow, and a new productivity formula of fractured horizontal well in tight gas reservoir derived by the new flow model. Third, the productivity influence research has been done, which gives the influence degree of different parameters. It is signified that the productivity will increase with the addition of the permeability modulus and decrease with the increase of the water-gas volume ratio. The influence of starting pressure gradient was not very clear and the fractures parameters showed the opposite situation. Therefore optimization design of tight gas reservoir development mode can be improved by the productivity formula and research.


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About this article

The new method on gas-water two phase steady-state productivity of fractured horizontal well in tight gas reservoir

Show Author's information Xucheng Li1, Jing Liang1( ), Weichong Xu2, Xiaoping Li2, Xiaohua Tan2( )
PetroChina Southwest Oil & Gasfield Company, Chengdu 610041, P. R. China
State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, P. R. China

Abstract

Based on a large number of tight gas exploration and development literature researches, it is found that the horizontal drilling technology and fracturing operation are usually used in the tight gas reservoir for its low permeability. Three tasks have been done in this paper. First, we described the characteristics and the flow mechanism of the tight gas reservoirs which are different from the conventional ones and gave a new definition of two phase pseudo pressure. Second, formation stress sensitivity, starting pressure gradient and the interaction of fractures are considered. Equivalent flow resistance was used to establish a model of tight gas steady flow, and a new productivity formula of fractured horizontal well in tight gas reservoir derived by the new flow model. Third, the productivity influence research has been done, which gives the influence degree of different parameters. It is signified that the productivity will increase with the addition of the permeability modulus and decrease with the increase of the water-gas volume ratio. The influence of starting pressure gradient was not very clear and the fractures parameters showed the opposite situation. Therefore optimization design of tight gas reservoir development mode can be improved by the productivity formula and research.

Keywords: fracture, Tight gas, horizontal, gas-water two phase, steady-state productivity.

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Publication history
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Publication history

Received: 17 July 2017
Revised: 15 August 2017
Accepted: 16 August 2017
Published: 25 September 2017
Issue date: September 2017

Copyright

© The Author(s) 2017

Acknowledgements

The authors are grateful for financial support from PetroChina Innovation Foundation (2016D-5007-0209) and the National Natural Science Foundation of China (51474181, 51504202).

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Published with open access at Ausasia Science and Technology Press on behalf of the Division of Porous Flow, Hubei Province Society of Rock Mechanics and Engineering.

This article is distributed under the terms and conditions of the Creative Commons Attribution (CC BY-NC-ND) license, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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