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Physical simulation experiment and numerical inversion of the full life cycle of shale gas well

Petroleum Research 2019年第2期4卷 181-190页

作者： Shusheng Gao Huaxun Liu Liyou Ye Zhiming Hu Weiguo An Research Institute of Petroleum Exploration&Development CNPCBeijing100083China Department of Porous Flow&Fluid Mechanics Research Institute of Petroleum Exploration&DevelopmentPetroChinaHebeiLangfang065007China

The ultra-low porosity and permeability,as well as complex occurrence and transport state of shale reservoir make it possess special L-type production characteristic curve and complicated shale gas flow *** solve the difficulty of collecting complete production data due to short production time and operation discontinuity,a full-diameter core physical simulation experiment on the full lifecycle production process of shale gas well depletion is conducted with the purpose of obtaining many important production data including complete pressure and daily gas output in the simulated production process of shale gas *** experimental results show the production characteristic from simulation is consistent with those from gas *** on the simulation data,the critical desorption pressure(12 MPa)of core,free gas production(3820.8 mL),adsorbed gas production(2151.2 mL),the proportion of the daily gas production between free and absorbed gas under different time and formation pressure,as well as the production time and final recovery rate corresponding to abandoned pressure,can be determined *** inversion is carried out to calculate the production performance curve of shale gas well and predict the development effect of gas well based on well testing and similarity analysis of the dimensionless time between core experiment and gas well ***,the permeability and the fracturing effect(fracture network density)as the keys to the effective development of shale gas reservoirs are *** permeability is the fundamental factor and the fracturing technology is the major means.

关键词： Shale gas well Full lifecycle Physical simulation experiment Numerical inversion Similarity theory Permeability fracturing effect

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Test evaluation for vertical fracture wells in low permeability reservoir

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Journal of Energy and Power Engineering 2009年第9期2卷 32-35页

作者： CUI Li-ping HE Shun-li MOE Key Laboratory for Petroleum Engineering China University of Petroleum Beo＇ing 102249 China

As flow environment is poor in low permeability reservoirs, wells are always fractured in order to gain better economic benefits. Well testing analysis is very necessary for fracturing wells. However, available test analysis methods are of slow fitting speed and low fitting precision. In this paper, we first use a comprehensive evaluation method of analytical well testing, numerical well testing and well testing design. Many dynamic parameters such as fracture length, fracture conductivity, skin factor, etc are obtained. An example to illustrate accurate results of this method is given.

关键词： test evaluation fracture wells low permeability reservoir fracturing effect

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