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Mathematical Problems in Engineering - Volume 2016 2016, Article ID 4260148, 9 pages -

Research Article

School of Oil & Gas Engineering, Southwest Petroleum University, Chengdu, Sichuan, China

SINOPEC Exploration & Production Research Institute, China Petroleum & Chemical Corporation, Beijing, China

State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development, China Petroleum & Chemical Corporation, Beijing, China

Received 15 October 2015; Revised 13 January 2016; Accepted 17 January 2016

Academic Editor: Nazrul Islam

Copyright © 2016 Qiguo Liu et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This paper established a triple porosity physical model in rectangular closed reservoirs to understand the complex fluid flowing mechanism and production behavior of multifractured horizontal wells in shale gas reservoirs, which is more appropriate for practical situation compared with previous ones. According to the seepage theory considering adsorption and desorption process in stable state, the gas production rate of a well producing at constant wellbore pressure was obtained by utilizing the methods of Green’s and source function theory and superposition principle. Meanwhile, the volume of adsorbed gas and the number of hydraulic fractures as well as permeabilities of matrix system and microfractures were discussed in this paper as sensitive factors, which have significant influences on the production behavior of the wells. The bigger the value of is, the larger the well production rate will be in the later flowing periods, and the differences of production rate with the increasing of are small, which manifest that there is an optimum for a given field. Therefore, the study in this paper is of significant importance to understand the dynamic production declining performance in shale gas reservoirs.





Autor: Qiguo Liu, Ke Li, Weihong Wang, Xiaohu Hu, and Hua Liu

Fuente: https://www.hindawi.com/



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