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Unconventional resource's production under desorption-induced effects

Petroleum 2016年第2期2卷 148-155页

作者： S.sina hosseini boosari Umut aybar Mohammad O.eshkalak petroleum and natural gas engineering department at west virginia universityusa petroleum and geosystems engineering department at the university of texas at austinusa

Thousands of horizontal wells are drilled into the shale formations across the *** hydrocarbon production is substantially increased during past *** fact is accredited to advances obtained in hydraulic fracturing and pad drilling *** contribution of shale rock surface desorption to production is widely accepted and confirmed by laboratory and field ***,the subsequent changes in porosity and permeability due to desorption combined with hydraulic fracture closures caused by increased net effective rock stress state,have not been captured in current shale modeling and ***,it is essential to investigate the effects of induced permeability,porosity,and stress by desorption on ultimate hydrocarbon *** have developed a numerical model to study the effect of changes in porosity,permeability and compaction on four major *** formations considering their Langmuir isotherm desorption *** resources include;Marcellus,New Albany,Barnett and Haynesville ***,we introduced a model that is a physical transport of single-phase gas flow in shale porous ***,the governing equations are implemented into a one-dimensional numerical model and solved using a fully implicit solution *** is found that the natural gas production is substantially affected by desorption-induced porosity/permeability changes and *** paper provides valuable insights into accurate modeling of unconventional reservoirs that is more significant when an even small correction to the future production prediction can enormously contribute to the ***.

关键词： Shale desorption Unconventional reservoirs Porosity change Permeability chang e desorption-induced effect

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