Modeling fracture fluid cleanup in tight gas wells

John Yilin Wang, Stephen A. Holditch, Duane A. McVay

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

16 Scopus citations

Abstract

On occasion, a hydraulically fractured tight gas well does not perform up to its potential because of slow or incomplete fracture fluid cleanup. A number of papers have been written to address individual factors related to fracture fluid cleanup, but there are still many unanswered questions as to which factors mostly affect gas production from such wells. Numerical reservoir simulation is one of the best methods to study the fracture fluid cleanup problem. Continuing from our previous publication (SPE 117444) on the impact of gel damage on fracture cleanup, we used reservoir simulation to analyze systematically the factors that affect fracture fluid cleanup and gas recovery from tight gas wells. We first developed a comprehensive data set for typical tight gas reservoirs, and then ran single-phase flow cases for each reservoir and fracture scenario to establish the idealized base-case gas recovery. We then systematically evaluated the following factors: multiphase gas and water flow, proppant crushing, polymer filter cake, and finally yield stress of concentrated gel in the fracture. The gel in the fracture is concentrated due to fluid leakoff during the fracture treatment. We evaluated these factors additively in the order listed. We found that the most important factor that reduces fracture fluid cleanup and gas recovery is the gel strength of the fluid that remains in the fracture at the end of the treatment. This paper illustrates the complexity of the fracture fluid cleanup problem and points out the need to use reservoir simulation and to include all the pertinent factors in order to rigorously model fracture fluid cleanup. The procedures presented can provide a useful, systematic guide to engineers in conducting a numerical simulation study of fracture fluid cleanup.

Original languageEnglish (US)
Title of host publicationSociety of Petroleum Engineers - SPE Hydraulic Fracturing Technology Conference 2009
PublisherSociety of Petroleum Engineers
Pages661-673
Number of pages13
ISBN (Print)9781605607788
DOIs
StatePublished - Jan 1 2009
EventSPE Hydraulic Fracturing Technology Conference 2009 - The Woodlands, TX, United States
Duration: Jan 19 2009Jan 21 2009

Publication series

NameSociety of Petroleum Engineers - SPE Hydraulic Fracturing Technology Conference 2009

Other

OtherSPE Hydraulic Fracturing Technology Conference 2009
CountryUnited States
CityThe Woodlands, TX
Period1/19/091/21/09

All Science Journal Classification (ASJC) codes

  • Geochemistry and Petrology
  • Geotechnical Engineering and Engineering Geology
  • Fluid Flow and Transfer Processes

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  • Cite this

    Wang, J. Y., Holditch, S. A., & McVay, D. A. (2009). Modeling fracture fluid cleanup in tight gas wells. In Society of Petroleum Engineers - SPE Hydraulic Fracturing Technology Conference 2009 (pp. 661-673). (Society of Petroleum Engineers - SPE Hydraulic Fracturing Technology Conference 2009). Society of Petroleum Engineers. https://doi.org/10.2118/119624-ms