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Study of inter-well interference in shale gas reservoirs by a robust production data analysis method based on deconvolution

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Petroleum Science 2024年第4期21卷 2502-2519页

作者： Wen-Chao Liu Cheng-Cheng Qiao Ping Wang Wen-Song Huang Xiang-Wen Kong Yu-Ping Sun He-Dong Sun Yue-Peng Jia School of Civil and Resource Engineering University of Science and Technology BeijingBeijing100083PR China PetroChina Research Institute of Petroleum Exploration and Development Beijing100083PR China

In order to overcome the defects that the analysis of multi-well typical curves of shale gas reservoirs is rarely applied to engineering,this study proposes a robust production data analysis method based on deconvolution,which is used for multi-well inter-well interference *** this study,a multi-well conceptual trilinear seepage model for multi-stage fractured horizontal wells was established,and its Laplace solutions under two different outer boundary conditions were ***,an improved pressure deconvolution algorithm was used to normalize the scattered production ***,the typical curve fitting was carried out using the production data and the seepage model ***,some reservoir parameters and fracturing parameters were interpreted,and the intensity of inter-well interference was *** effectiveness of the method was verified by analyzing the production dynamic data of six shale gas wells in Duvernay *** results showed that the fitting effect of typical curves was greatly improved due to the mutual restriction between deconvolution calculation parameter debugging and seepage model parameter ***,by using the morphological characteristics of the log-log typical curves and the time corresponding to the intersection point of the log-log typical curves of two models under different outer boundary conditions,the strength of the interference between wells on the same well platform was well *** work can provide a reference for the optimization of well spacing and hydraulic fracturing measures for shale gas wells.

关键词： Shale gas inter-well interference Deconvolution Production data analysis Typical curves Multi-stage fractured horizontal well

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inter-well interferences and their influencing factors during water flooding in fractured-vuggy carbonate reservoirs

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Petroleum Exploration and Development 2020年第5期47卷 1062-1073页

作者： WANG Jing ZHAO Wei LIU Huiqing LIU Fangna ZHANG Tuozheng DOU Liangbin YANG Xinling LI Bo State Key Laboratory of Petroleum Resources and Prospecting in China University of Petroleum Beijing 102249China MOE Key Laboratory of Petroleum Engineering in China University of Petroleum Beijing 102249China College of Petroleum Engineering Xi’an Shiyou UniversityXi’an 710065China PetroChina Xinjiang Oilfield Company Xinjiang 834000China

Based on the characteristics of injection-production units in fractured-vuggy carbonate reservoirs,nine groups of experiments were designed and performed to analyze the interference characteristics and their influencing factors during water *** on percolation theory,an inversion model for simulating waterflooding interferences was proposed to study the influence laws of different factors on interference *** results show that well spacing,permeability ratio,cave size,and cave location all affect the interference characteristics of water *** the cave is located in high permeability fractures,or in the small well spacing direction,or close to the producer in an injection-production unit,the effects of water flooding are much *** the large cave is located in the high-permeability or small well spacing direction,the well in the direction with lower permeability or smaller well spacing will see water breakthrough *** the cave is in the higher permeability direction and the reserves between the water injector and producer differ greatly,the conductivity differences in different injection-production directions are favorable for water *** the injection-production well pattern is constructed or recombined,it’s better to make the reserves of caves in different injection-production directions proportional to permeability,and inversely proportional to the well *** well close to the cave should be a producer,and the well far from the cave should be an *** ratios of cave reserves to fracture reserves correspond to different optimal well spacings and optimal permeability ***,both optimal well spacing and optimal permeability ratio increase as the ratio of cave reserves to fracture reserves increases.

关键词： fractured-vuggy carbonate reservoir water flooding inter-well interference physical modeling experiment numerical inversion

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