聚合物水淹层测井响应特征  

Log response characteristics of polymer flooded watered-out layer

作　　者：陈德坡[1,2] 张兴平[2] 李奋[2] 高建[2] 

机构地区：[1]中国地质大学,北京100083 [2]中国石化胜利油田地质科学研究院,山东东营257015

出　　处：《大庆石油地质与开发》2008年第6期123-127,共5页Petroleum Geology & Oilfield Development in Daqing

摘　　要：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：聚合物 聚合物水淹层 测井响应 

分 类 号：TE631.811[石油与天然气工程—油气加工工程]