大庆喇嘛甸油田聚驱后压堵驱剩余潜力挖潜可行性  

Feasibility of fracturing⁃plugging flooding to tap remaining potential after polymer flooding in Lamadian Oilfield in Daqing

作　　者：张冶[1] 程毅 ZHANG Ye;CHENG Yi(No.6 Oil Production Company of PetroChina Daqing Oilfield Co Ltd,Daqing 163114,China)

机构地区：[1]中国石油大庆油田有限责任公司第六采油厂,黑龙江大庆163114

出　　处：《大庆石油地质与开发》2022年第6期109-116,共8页Petroleum Geology & Oilfield Development in Daqing

基　　金：中国石油天然气股份有限公司重大科技专项“化学驱后提高采收率技术研究与试验”(2016E-0207)。

摘　　要：喇嘛甸油田聚驱后后续水驱区块剩余油分布零散、无效循环严重、有效挖潜手段少。为解决喇嘛甸油田聚驱后后续水驱区块剩余潜力挖潜方法单一、效果不明显的问题,在搞清剩余油分布状况、压堵驱原理的基础上,进一步明确了压堵驱选井原则。通过室内实验,确定了压驱方式的驱替液类型、压堵方式的堵剂。现场试验结果表明:压驱方式增液、增油幅度均好于普通压裂,其中一类油层后续水驱井增液幅度是普通压裂的2.8倍,增油幅度是普通压裂的2.0倍,二类油层后续水驱井增液幅度是普通压裂的2.5倍,增油幅度是普通压裂的2.4倍;压堵方式能够起到封堵作用,但并不能达到降水、增油的效果。研究成果明确了压堵驱方式挖潜聚驱后高含水采油井厚油层剩余潜力的可行性,可为后期压堵驱选井选层提供依据。The subsequent water flooding block after polymer flooding in Lamadian Oilfield has scattered remaining oil and serious invalid circulation,and there are few effective potential tapping methods.In order to solve the prob‑lem that the method of tapping remaining potential is single and the effect is not obvious after polymer flooding in Lamadian Oilfield,on the basis of understanding remaining oil distribution and principle of fracturing-plugging flooding,well screening principle of fracturing-plugging flooding is further clarified.Laboratory experiment deter‑mines the types of displacement fluid and plugging agent for fracturing flooding.Field test results show that both flu‑id and oil increment by fracturing flooding is much than that by conventional fracturing.For Class 1 reservoirs,fluid increment and oil increment from subsequent water flooding wells are respectively 2.8 times and 2.0 times of that by conventional fracturing,while for Class 2 reservoirs,fluid increment and oil increment from subsequent water flood‑ing wells are respectively 2.5 times and 2.4 times of that by conventional fracturing.Fracturing-plugging can play a role in plugging,but cannot achieve the effect of reducing water cut and increasing oil production.The research clarifies the feasibility of fracturing-plugging flooding to tap the remaining potential of thick reservoirs in high water cut producers after polymer flooding,and provides evidence for selecting wells and layers by fracturing-plugging flooding in later stage.

关 键 词：喇嘛甸油田 聚驱后 厚油层 剩余油 无效循环 压驱 压堵 

分 类 号：TE357.461[石油与天然气工程—油气田开发工程]