Testing tight gas and unconventional formations and determination of closure pressure

M. Y. Soliman, Talal Gamadi

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

12 Scopus citations

Abstract

Experience indicates that applying the conventional testing techniques such as drawdown-buildup tests to unconventional reservoir may lead to non-unique answers. Diagnostic testing approach is now more commonly used in tight gas formations and unconventional reservoirs. Testing unconventional reservoirs, particularly hydrocarbon-bearing shale formations, presents considerable challenges. In addition determination of the fracture closure pressure is sometime elusive. This paper reviews those challenges faced in analysis of testing of tight gas and unconventional reservoirs both liquid and gas. Conventional testing and analysis methods, although applicable, are often impractical because of excessive test duration. Diagnostic fracture injection test (DFIT) has become the preferred option for unconventional formations. Several methods may be used for interpreting DFIT data. We examine those methods in detail and explore their relative strengths while interpreting field data. We also show ways to determine the fracture closure pressure under various reservoir and fracture conditions.

Original languageEnglish
Title of host publicationSociety of Petroleum Engineers - SPE/EAGE European Unconventional Resources Conference and Exhibition 2012
PublisherSociety of Petroleum Engineers
Pages179-184
Number of pages6
ISBN (Print)9781618398109
DOIs
StatePublished - 2012
EventSPE/EAGE European Unconventional Resources Conference and Exhibition 2012 - Vienna, Austria
Duration: Mar 20 2012Mar 22 2012

Publication series

NameSociety of Petroleum Engineers - SPE/EAGE European Unconventional Resources Conference and Exhibition 2012

Conference

ConferenceSPE/EAGE European Unconventional Resources Conference and Exhibition 2012
CountryAustria
CityVienna
Period03/20/1203/22/12

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    Soliman, M. Y., & Gamadi, T. (2012). Testing tight gas and unconventional formations and determination of closure pressure. In Society of Petroleum Engineers - SPE/EAGE European Unconventional Resources Conference and Exhibition 2012 (pp. 179-184). (Society of Petroleum Engineers - SPE/EAGE European Unconventional Resources Conference and Exhibition 2012). Society of Petroleum Engineers. https://doi.org/10.2118/150948-ms