Rate-time decline analysis for natural gas wells with significant rock compressibility effects

Miao Zhang, Luis F. Ayala H

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

1 Scopus citations

Abstract

State-of-the-art analysis of production performance of gas wells relies on material balance concepts combined with pseudo-pressure and pseudo-time for rate-time decline analysis and reserve estimations. Customarily, rock compressibility and reservoir pore volume change are either neglected or accounted for by replacing gas compressibility with total compressibility values. In this work, we extend the applicability of a rescaled exponential and density-based decline analysis approach (Ayala and Ye, 2012 and Ayala and Ye, 2013) for the decline analysis of gas systems experiencing significant rock compressibility effects. We formally derive the density-based analytical technique that rigorously captures formation compressibility effects during for the analysis of gas well production data during boundary-dominated-flow (BDF). This formulation enables calculation of correct prediction of well performance with depletion) by incorporating formation compressibility and the change of reservoir pore volume effects, which proves crucially important for high-pressure and/or large-formation-compressibility gas reservoir systems.

Original languageEnglish (US)
Title of host publicationSociety of Petroleum Engineers - SPE Annual Technical Conference and Exhibition, ATCE 2013
Pages2863-2875
Number of pages13
StatePublished - Dec 1 2013
EventSPE Annual Technical Conference and Exhibition, ATCE 2013 - New Orleans, LA, United States
Duration: Sep 30 2013Oct 2 2013

Publication series

NameProceedings - SPE Annual Technical Conference and Exhibition
Volume4

Other

OtherSPE Annual Technical Conference and Exhibition, ATCE 2013
CountryUnited States
CityNew Orleans, LA
Period9/30/1310/2/13

All Science Journal Classification (ASJC) codes

  • Fuel Technology
  • Energy Engineering and Power Technology

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  • Cite this

    Zhang, M., & Ayala H, L. F. (2013). Rate-time decline analysis for natural gas wells with significant rock compressibility effects. In Society of Petroleum Engineers - SPE Annual Technical Conference and Exhibition, ATCE 2013 (pp. 2863-2875). (Proceedings - SPE Annual Technical Conference and Exhibition; Vol. 4).