Studies on Transient Productivity of Fractured Horizontal Well in the Triple Porosity Gas Reservoir with Bottom-water

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  • 1.The Center for Post-doctoral Studies of Southwest Oil & Gas Field Company,PetroChina,Chengdu 610041,China|
    2.Exploration and Development Research Institute of Southwest Oil & Gas Field Company,PetroChina,Chengdu 610041,China|
    3.The Post-doctoral Research Station of Southwest Petroleum University,Chengdu 610500,China

Received date: 2013-12-04

  Revised date: 2014-02-13

  Online published: 2019-09-20

Abstract

In order to investigate the seepage flow of the fractured horizontal well in the triple medium gas reservoir with bottom water and the reduction of the gas-well production due to the intrusion of bottom-water,based on a physical model where the gas in the cave and matrix systems channels to fracture system,and is produced through the fracture system,and the bottom-water boundary is considered as semi-filtration borders.The transient seepage mathematical model for triple medium gas reservoirs is established,and the mathematical model can be solved by the method of source function and the integral methods such as finite Fourier cosine transform and Bessel functions,and the point source solution is gotten.On this basis,the pressure response and the transient production model of multi-stage fractured horizontal wells are obtained by means of semi-analytical method which combines analytical method and numerical method.The transient production characteristic curve is obtained by means of the numerical inversion of Stehfest method.According to the analysis of the variation of gas production with time,the effect of fracture number,fracture half-length,fracture interval,the inter-porosity flow parameter and the storage-ratio on transient productivity is studied.The methods and results of this research contribute to the reasonable analysis of the production performance of fractured horizontal well in the triple medium gas reservoir with bottom-water and optimization of the fracturing design parameters.

Cite this article

FAN Huai-cai, ZHONG Bing, DENG Hui, LIU Yi-cheng, YANG Xue-feng, FENG Xi, ZHANG Xiao-tao . Studies on Transient Productivity of Fractured Horizontal Well in the Triple Porosity Gas Reservoir with Bottom-water[J]. Natural Gas Geoscience, 2014 , 25(11) : 1861 -1867 . DOI: 10.11764/j.issn.1672-1926.2014.11.1861

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