石油钻采工艺2016，Vol.38Issue(6)：876-881,6.DOI:10.13639/j.odpt.2016.06.031
防砂井投产初期砾石层渗透率损害规律
Regularity of permeability loss in gravel-packing layer for sand control during initial production
摘要
Abstract
Wells with gravel packing for sand control may experience dramatic productivity decline shortly after production. Tests are conducted to highlight changes in permeability of compacted gravel-packing layers and plugging of such layers due to absorption. Eventually, patterns of permeability loss in gravel-packing layers during initial production are determined. Test results show, down-hole compaction and crude oil absorption and plugging are main contributors for permeability loss in gravel-packing layer during initial production. Permeability of gravel-packing layer may decrease signiifcantly with increase in external pressure. Permeability of gravel-packing layers compacted under pressure 40 MPa may be approximately 5%~11%of original permeability;Water permeability of gravel-packing layer may decrease rapidly after alternative displacement with permeability loss factor of approximately 0.75~0.85. Ratio of permeability loss in short duration may vary slightly with changes in displacement time and temperature. Based on relevant test results, prediction model and technique for prediction of permeability loss in gravel-packing layer during initial production have been constructed. The innovative model and technique may provide valuable guidance for research and production in relevant ifelds.关键词
砾石充填/防砂/挡砂介质/投产初期/渗透率损害/吸附堵塞Key words
gravel-packing/sand control/sand-blocking media/initial production/permeability loss/absorption and plugging分类
能源科技引用本文复制引用
高凯歌,董长银,高聚同,周崇,何海峰,董云彬..防砂井投产初期砾石层渗透率损害规律[J].石油钻采工艺,2016,38(6):876-881,6.基金项目
国家自然科学基金“疏松砂岩油气藏水平井管外地层砾石充填机理及模拟基础研究”（编号51374226）。 （）
