Multiphase transient analysis of flowback and early production data ofunconventional gas wells

Kien Nguyen, Miao Zhang, Jonathan Garcez, Luis F. Ayala

Research output: Contribution to conferencePaperpeer-review

1 Scopus citations

Abstract

Analysis of fracturing water flowback data from hydraulic fractures in unconventional reservoirs playsan important role in determining key fracture properties and predicting future well performance. Currentflowback data analysis tools mostly rely on empirical correlations and/or simplified models. This paperpresents a semi-analytical, multiphase solution that is applicable to the analysis of not only water flowbackbut early gas production data of multi-fractured horizontal gas wells. The proposed solution couples aGreen's function-based analytical solution for gas flow in matrix with a finite-difference numerical solutionfor two-phase (gas and water) flow in fracture domain. The validity of proposed semi-analytical solutionis verified against simulation results generated using commercial numerical simulators. Inverse analysistechniques are developed based on the proposed semi-analytical solution and presented in the form of typecurves. Synthetic case studies show that the proposed type-curve methods can provide explicit and accurateestimation of fracture and reservoir properties, including fracture conductivity, and fracture pore volume.For all case tested, the proposed model is shown to provide accurate and consistent prediction of reservoirperformance and estimations of fracture properties while maintaining the simplicity of explicit, iteration-free calculations.

Original languageEnglish (US)
DOIs
StatePublished - 2020
EventSPE Annual Technical Conference and Exhibition 2020, ATCE 2020 - Virtual, Online
Duration: Oct 26 2020Oct 29 2020

Conference

ConferenceSPE Annual Technical Conference and Exhibition 2020, ATCE 2020
CityVirtual, Online
Period10/26/2010/29/20

All Science Journal Classification (ASJC) codes

  • Fuel Technology
  • Energy Engineering and Power Technology

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