水合物储层人工裂缝支撑剂嵌入深度预测方法OA

Given the absence of a prediction method for proppant embedding depth in artificial fractures of hydrate reservoirs,this study employs a hypoplastic constitutive model to quantitatively evaluate the impact of hydrate saturation on the mechanical parameters of the sediments.By integrating the load distribution at the proppant-sediment interface with their respective deformation characteristics,a computational model is developed to determine the proppant embedment depth across three distinct stages:elastic,elastoplastic and fully plastic.Based on the established model,the influences of hydrate saturation,proppant particle size,proppant arrangement pattem,and closure pressure on the proppant embedding depth are analyzed.The results demonstrate that the proppant embedding depth in fractures of hydrate reservoirs increases with greater closure pressure and larger proppant particle sizes,while it decreases with higher hydrate saturation and increased proppant areal packing density.At a constant closure pressure,the proppant embedding depth exhibits a nonlinear relationship with hydrate saturation,proppant particle size,and proppant areal packing density,with this nonlinearity becoming more pronounced at elevated closure pressures.