合水油田注水区块储层堵塞机理及治理措施  

Reservoir Blocking Mechanism and Treatment Measures in the Water Injection Block of Heshui Oilfield

作　　者：王牧 WANG Mu(Xi＇an Shiyou University,Shaanxi Xi＇an 710065,China;PetroChina Changqing Oilfield Company No.12 Oil Production Plant,Shaanxi Xi＇an 710200,China)

机构地区：[1]西安石油大学,陕西西安710065 [2]中国石油长庆油田分公司第十二采油厂,陕西西安710200

出　　处：《辽宁化工》2018年第9期900-902,905,共4页Liaoning Chemical Industry

摘　　要：注水开发为油田开发中后期广泛采取提高采收率措施,低渗储层由于储层内粘土矿物较高,使得储层敏感性较强,长期的注水开发导致储层堵塞、渗流能力降低,影响注水指标的完成和采收井的产量。分析了合水油田注水区块储层堵塞的原因,开展了岩心敏感性分析,明确了研究区储层堵塞的机理。利用室内实验配制不同浓度的氢氟酸和盐酸,分析混合酸液对储层污染物的溶蚀效果,最终优选了解堵混合酸液最佳配比。In the middle and late period ofoil field development, water flooding is widely used to improve oil recovery. Because of the high clay mineral content in the low permeability reservoir, the reservoir sensitivity is strong, long-term water injection development leads to the blockage of the reservoir and the decrease of the percolation capacity, which affects the completion of the water injection index and the production of the recovery wells. In this paper, causes of reservoir blockage in the water injection block of Heshui oilfield were analyzed, and core sensitivity analysis was carded out, and the mechanism of reservoir blockage in the study area was defined. Different concentrations of hydrofluoric acid and hydrochloric acid were used in laboratory experiments to analyze the effect of mixed acid solution on the dissolution of reservoir oollutants. Finally, the ratio of mixed acid solution was optimized.

关 键 词：低渗储层 储层伤害 解堵技术 油田注水 

分 类 号：TE355[石油与天然气工程—油气田开发工程]