Optimizing hydraulic fracturing development methods and well pattern parameters for delta front reservoirs requires an integrated geological engineering approach.Using the Fuyu layer in L block of the southern placanticline,northern Songliao Basin as a study case,a reservoir rock mechanics model was constructed with constraints from a facies-controlled geological model.An in-situ fluid-solid coupling finite element stress simulation method was then used to perform a three-dimensional sim-ulation of the in-situ stress field,based on the geological and rock mechanics models.The simulated in-situ stress values and directions have been verified to be consistent with Kaiser effect data and imaging logging data,respectively.Hydraulic fractu-ring fractures in two wells were subsequently simulated and verified using fracturing construction data and micro-seismic monito-ring data,applying the aforementioned models.Finally,a dual porosity and dual permeability model was developed under the fluid-solid coupling framework,yielding strong results through history fitting.The study quantitatively explored the relationship between vertical well pattern characteristics and the adaptability of regional geological and physical features.The findings indi-cate that under depletion production,a 500 m×150 m well pattern in areas with good reservoir quality yielded 11% higher cu-mulative oil production over 15 a compared to a 300 m×120 m well pattern.In contrast,in areas with poorer reservoir conditions influenced by underwater distributary channels,the 300 m×120 m well pattern produced 8.16% more oil.Under water injection production,the 15 a cumulative oil output of a 500 m×150 m well pattern exceeded that of a 300 m×120 m well pattern by more than 30%,with the advantage being more pronounced in areas with poor reservoir conditions.This study provides theoretical support for optimizing fracturing development in similar tight reservoirs.
关键词
致密储层/地质工程一体化/三维压裂模拟/应力有限元模拟/沉积相
Key words
tight reservoir/geological engineering integration/three-dimensional fracturing simulation/finite element stress simulation/sedimentary facies
维普
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