基于气井防砂砾石粒径构成特征的砾石堆积孔隙直径分析

摘要

根据气井防砂砾石的粒径构成特征及完井防砂砾石充填是多种粒径砾石混合而成的堆积碎散性特征,通过剖析高压充填条件下混合粒径砾石堆积的排列结构,建立砾石堆积孔隙直径结构理论模型,推导出计算砾石堆积孔隙直径尺寸的公式.同时,通过理论计算分析了砾石颗粒的粒径比对砾石堆积孔隙直径尺寸的定量影响规律,为水合物试采井防砂砾石粒径的选择提供了理论依据.%According to the characteristics of particle size distribution of sand control gravel in gas well , and completion sand control gravel has fragmental characteristics with a variety gravel of particle sizes mixed .By analy-zing permutation structure of the mixture particle size of gravel under high pressure filling condition , a theoretical model was established for pore diameter structure of gravel accumulation , then which was used to derive the formula for calculating the diameter of gravel accumulation .At the same time , for the size ratio of gravel particles to gravel diameter , the quantitative influence law was analyzed by theoretical calculation , which provided a theoretical basis for the selection of sand gravel diameter for hydrate production test wells .