聚合物水淹层测井响应特征Log response characteristics of polymer flooded watered-out layer
陈德坡,张兴平,李奋,高建
CHEN De-po~(1,2),ZHANG Xing-ping~2,LI Fen~2
摘要(Abstract)：
随着油藏开发的不断深入,聚合物驱油成为老油田提高采收率的重要手段。矿场实践表明,油层聚合物水淹后的测井响应特征发生了变化,给聚合物水淹层测井解释提出了新的问题,并直接影响剩余油分布研究。胜利油田聚合物配注方式主要有两种:清水配制母液清水注入和清水配制母液污水注入。通过注聚合物前后新、老井的测井曲线对比分析,系统研究不同的配注方式下的电阻率、自然电位及微电极等测井曲线的测井响应特征及变化规律,为定性判别聚合物水淹层提供依据。通过室内实验,从机理上初步研究认为聚合物水淹层测井响应特征变化的主要原因是混合地层水的矿化度变化,而不是聚合物本身。研究成果为聚合物水淹层测井解释提供了基础。
With the continuous further development of oil reservoir,polymer flooding has become the more important measure of enhancing oil recovery for those mature oilfields.But the field practice shows that the characteristics of well logging response have changed a lot after polymer flooding of these oil reservoirs,thus new problem has occurred for these layers' logging interpretation and furthermore the studies of residual oil distribution have been influenced.At present, there are two kinds of polymer preparation and injection in Shengli Oilfield:one is mother liquid prepared by clear water and then injected with fresh water and the other the same mother liquid injected with waste water.Through well log's contrast analysis for the new and old wells before and after polymer flooding,the well logging responses and change laws of resistivity,spontaneous potential,minilog and so on have been systematically studied,so the evidence for qualitative recognizing watered-out layers after polymer flooding has been provided.By means of indoor tests,from the viewpoint of mechanism,the elementary studies show that the main change reasons of above well-logging response features are the change of salinity for the blended formation water not the polymer itself.All the results stated above have offered the basement for well logging interpretation of those polymer-flooded and watered-out oil layers.
关键词(KeyWords)：
聚合物;聚合物水淹层;测井响应
polymer;polymer flooded watered-out layer;log response
基金项目(Foundation):
作者(Author):
陈德坡,张兴平,李奋,高建
CHEN De-po~(1,2),ZHANG Xing-ping~2,LI Fen~2
参考文献(References)：
- [1]李振泉.孤岛油田中一区特高含水期聚合物驱工业试验[J].石油勘探与开发,2004,31(2):129-131.
- [2]王启民,廖广志,牛金刚.聚合物驱油技术的实践与认识[J].大庆石油地质与开发,1999,18(4):1-5.
- [3]徐正顺,王冬梅,陈福明,等.大庆油田聚合物驱潜力评价[J].大庆石油地质与开发,2001,20(2):50-52.
- [4]卢祥国,张云宝.聚合物驱后进一步提高采收率方法及其作用机理研究[J].大庆石油地质与开发,2007,26(6):113-118.
- [5]蔡燕杰,赵金亮,关悦.孤岛油田中一区聚合物驱油井见效特征及影响因素[J].石油勘探与开发,2000,27(6):63-64.
- [6]刘兵开,穆津杰.聚合物驱岩石电阻率变化特征的实验研究[J].测井技术,2003,27(增刊):44-46.
- [7]毕生,彭立,注聚开发对测井曲线的影响[J].石油仪器, 2002,16(4):41-43.
- [8]吴文祥,刘洋.聚合物驱后岩心孔隙结构变化特性研究[J].油田化学,2002,19(3):253-256.
- [9]岳兴举,马德华,杨静波.朝阳沟油田水淹层评价方法研究[J].大庆石油地质与开发,2007,26(2).55-58.
- [10]曾流芳,李林祥,卢云之.聚合物驱水淹层测井响应特征[J].测井技术,2004,28(1):71-74.