预凝胶技术及其在火烧山裂缝性砂岩油藏中的应用

火烧山油田是一个裂缝性特低渗透砂岩油田 ,调堵水技术应用在该油田发挥着重要的作用 ,但是随着堵水次数的增加以及大裂缝的存在 ,使堵水效果越来越差。 1998年在火烧山油田的H 1194井组应用预凝胶技术进行调剖 ,施工 4口井 ,措施后增加的可采储量为 15× 10 4 t,增加的水驱采收率为 5 79%。文中叙述了预凝胶体系性能的主要影响因素以及用于测试其性能指标的流动实验 ,简介了H 1194井组的施工效果。

The Study on Preformed Wead Gel and Its Application in Fractured Sandstone Reservoir in Huoshaoshan Oilfield

Huoshaoshan oilfield is a fractured sandstone reservoir with low permeability bedding.Profile modification and fracture blocking plays an important role in improving sweep efficiency in the reservoir.However,there still lies some problems left unsolved in finding a efficient way to deal with huge fracture and a good way to face the worse and worse result with frequent water controlling.In 1998,the pregelation technique is implemented four times,which leads to increasing recoverable reserves by 150 000 t,increasing waterflood recovery efficiency factor by 5.79%.The dissertation states the main factor that effect the character of pregelation system and the flowing experiment that test the pregelation performance.