| The JingHe field is a typical tight sandstone reservoir.Compared with the peripheral fields,it is more difficult to develop.Generally,the fracturing methods cannot achieve economical and effective development,and the reservoir must be subjected to multi-stage fracturing to improve the characteristics of reservoir seepage.Achieve a certain commercial exploitation value.Therefore,optimization of fracture parameters and optimization of construction parameters for multi-stage fracturing horizontal wells is the key to further improve the post-compression development results.This paper combines the reservoir characteristics and fluid properties of the Chang 8 reservoir in the Jing He field,uses a numerical simulation technique to establish a conceptual model,and uses the control variable method to study the effect of fracture parameters on the post-pressing capacity of multi-stage fracturing horizontal wells(single well and two wells).The optimal fracture parameter range is given,including: horizontal well azimuth,fracture half length,diversion capacity,and number of fractures;when the multi-well fracture parameters are optimized,the effects of well spacing and fracture distribution methods must also be considered.Based on the optimal fracture parameter range,the influence of construction parameters on fracturing results was studied through fracturing software,and the construction parameters were optimized,including: average sand ratio,displacement,and proportion of pre-fluid.The optimization results were applied to the pilot test of Well A,and the fracture simulation results and actual fracturing monitoring results were compared to verify the reliability of the parameter optimization.A three-dimensional geological model and a reservoir model were established to predict the post-pressure production of well A.The above research results on fracture parameters and construction parameters optimization can provide reference for the optimal design of fracturing in Jing He field. |
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