降水防砂复合材料的研究与应用

针对大港油田疏松砂岩区块含水上升快、出砂加剧，常规防砂工艺技术无法解决既防砂又能有效降水的问题，研制出了一种自身可固结的颗粒型降水防砂复合材料（粒径0.3～0.5，0.5～0.7和0.7～1.4 mm）。采用正交试验进行了材料配方优选，并对优选出的材料进行了固化温度和固化时间对人工岩心固结强度和渗流能力的影响评价、耐酸碱介质性能评价和岩心稳定性评价。结果表明:该系列降水防砂复合材料适用于井温30～80 ℃的油井，人工岩心抗压强度大于3 MPa，液相渗透率0.3～0.8 μm2（根据粒径可以调节）。该降水防砂复合材料在大港油田成功实施了16井次，防砂施工成功率100%，防砂有效率93.8%，平均降水率达14.7%，取得了较好的降水防砂效果。 

Research and Application of Composite Material for Lowering Water Cut and Sand Control

In order to resolve the problem of water cut increase rapidly and sand production seriously from unconsolidated sand formation in Dagang Oilfield which can not be resolved with conventional technology,a composite material with self-consolidation(grain size of 0.3-0.5,0.5-0.7,and 0.7-1.4 mm)was developed to lower water production and control sand.The material formulation was optimized by orthogonal experiment design.Using the selected materials,the impacts of temperature and time on strength and permeability...