New production-decline models for fractured tight and shale reservoirs

Tariq Ali, James Sheng, Mohamed Soliman

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Scopus citations

Abstract

Production decline curve analysis is one of our common methods to estimate production rate profile and ultimate recovery of a tight or shale gas reservoir. Because of the long transient behavior of low-permeability gas reservoirs, early production data generally exhibits fracture-dominated flow regimes and late-time flow regimes have not reached yet. These challenges the robustness of production decline curve analysis in such reservoirs, and this also question the validity of several models presented in the literature. If a well produces at a constant flowing pressure, a log-log plot of rate divided byover cumulative gas production vs. cumulative gas production yields a straight line, and cumulative gas production vs. time yields another straight line as well. Based on these two relationships and real data observations, new production-decline models are proposed in this paper. The proposed models are verified by a large number of well production data in tight and shale reservoirs. These models are also validated by numerically simulated cases. Under some special conditions, the proposed models can be used to validate some published models. Many real data and simulate data show that the proposed models can be reliably used to estimate production rates and the ultimate recovery in tight and shale reservoirs.

Original languageEnglish
Title of host publicationSociety of Petroleum Engineers Western North America and Rocky Mountain Joint Conference and Exhibition 2014
PublisherSociety of Petroleum Engineers
Pages453-467
Number of pages15
ISBN (Print)9781632665294
DOIs
StatePublished - 2014
EventSociety of Petroleum Engineers Western North America and Rocky Mountain Joint Conference and Exhibition 2014 - Denver, CO, United States
Duration: Apr 15 2014Apr 18 2014

Publication series

NameSociety of Petroleum Engineers Western North America and Rocky Mountain Joint Conference and Exhibition 2014
Volume1

Conference

ConferenceSociety of Petroleum Engineers Western North America and Rocky Mountain Joint Conference and Exhibition 2014
CountryUnited States
CityDenver, CO
Period04/15/1404/18/14

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  • Cite this

    Ali, T., Sheng, J., & Soliman, M. (2014). New production-decline models for fractured tight and shale reservoirs. In Society of Petroleum Engineers Western North America and Rocky Mountain Joint Conference and Exhibition 2014 (pp. 453-467). (Society of Petroleum Engineers Western North America and Rocky Mountain Joint Conference and Exhibition 2014; Vol. 1). Society of Petroleum Engineers. https://doi.org/10.2118/169537-ms