摘要
大庆油田进入二次加密调整以来 ,长垣萨葡高油层中的薄 (有效厚度≤ 0 5m)、差油层 (独立表外层 )成为加密调整的主要对象 ,该类油层非均质性严重 ,层数多 ,岩性、物性变化大、孔隙结构复杂 ,测井资料反映的水淹信息较弱 ,再加上高含水后期剩余油分布的复杂性 ,使得薄差层水淹层测井解释符合率较低。针对储层的地质特点及油田污水回注的开发现状 ,以油藏条件下水淹层导电机理研究为指导 ,提出了应用岩石物理相分析技术 ,突出水淹层测井响应信息的研究思路 ,并以萨中密闭取心资料为基础 ,形成了一套利用常规测井资料解释薄差层水淹层的方法及测井交互解释系统。经实际资料检验 ,解释符合率达到 75 0 %以上。
Since Daqing Oilfield entering the second infilling adjustment,thin (effective thickness≤0.5m), poor (isolated untabulated layers) pay zones in Sa-Pu-Gao reservoirs have been the main infilling and adjustment targets.This kind of pay zones is characterized by its high heterogeneity,multi-layers,varying litho logy and property,complex pore structure,and weak response to well logging data . Besides,residual oil distribution at the late period of high water cut stage is complexity.Therefore,coincidence rate of the thin and poor watered-out pay zones in well interpretation is lower.Based on the geological characteristics of the reservoirs and oilfield development state of produced-water reinjection in the field,guided by watered-out pay zone conductive mechanism study under the reservoir condition, petrophysics facies analysis technique is used to study the response information of the watered-out pay zone well logging. And based on sealing core drilling data in Sazhong area,a set of conventional well logging data to interpret the thin and the poor pay zones and well logging interpretation interactive system is formed. After field data checking,the coincidence rate of the interpretation reaches more than 75.0%.
出处
《大庆石油地质与开发》
CAS
CSCD
2004年第5期118-120,共3页
Petroleum Geology & Oilfield Development in Daqing
关键词
高含水后期
薄差层
水淹层
测井解释
岩石物理
late period of high water cut
thin and poor pay zones
watered out pay zones
well logging interpretation
petrophysics
