法国IFP选择性堵水技术

IFP self selective agents for water shutoff.

重点介绍法国石油研究院的堵水技术 (IFP堵水技术 ) ,开发的堵水剂都是相对渗透率改善剂 (RelativePermeabilityModifiers,又称Disproportionate Permea bilityReducer) ,对油或气体的相对渗透率影响并不大。IFP化学溶液满足笼统注入的条件。阐述了IFP堵水技术的特性 ,分析了IFP选井方法和堵水工艺技术 ;还介绍了用IFP技术堵水的典型现场试验 ,包括地下储气库的储气井、开采稠油的水平井、海上的砾石充填井、多层水驱井等。此外也介绍了IFP的最新技术发展的两个主要研究方向 :①针对注水井处理 ,IFP进行了微凝胶深部调剖剂的研究 ;重点是研究对微凝胶的大小及构造的控制。②针对改善笼统注入效果 ,进行了预处理转向剂的研究 ;该转向剂以高分子聚合物的无稳态滞留现象 (称为“桥联吸附”)

This paper introduces the water shutoff technology developed at the French Petroleum Institute (Institute Franais du Pétrole, IF P). The specificity of this technology is described, along with the original res e arch approach from the French institute research team. This technology is based on the use of relative permeability modifiers ( RPM's ) also called disproportio nate permeability reducers ( DPR's ). The different water shutoff agents can be bullheaded into the existing completions without zone isolation. All systems are designed to minimize the damage on oil or gas relative permeability. A review o f typical field applications is given: gas storage wells, heavy oil horizontal w ells, gravel packed wells and multilayer waterflooded wells. In addition, the most recent focuses of research are also presented. The se include the study of microgels to treat injection wells, and the development of preflush agents to control the placement of the water shutoff agents in produ cer wells. The research on microgels aims at controlling the size and the struct ure of the microgels. The preflush diversion is based on “bridging adsorption” , an unsteady state retention phenomena which occurs when injecting high molecul ar weight polymer in low permeability cores.