吉林大情字井油田低阻油层的识别方法研究

Identification of Low-Resistivity Oil Zone in Daqingzi Oilfield,Jilin

吉林大情字井油田是一个具有多套含油层系的大型油田。由于本区构造幅度低、岩性细、地层水矿化度变化大以及钻井液滤液侵入等因素的影响,使得该区流体识别的难度大。通过分析油水层与测井曲线的典型对应关系,提出了适合本区的流体识别方法:微差识图法、电阻率增大法、油藏综合分析法。

Daqingzi Oilfield in Jilin is a large-scale oilfield with multi-pay zone systems that made it one of important areas for production growth.The fluid identification is difficult in this area due to low amplitude structure,fine lithology,a great change of formation fluid and mud invasion.This paper presents medium-low porosity,low permeability reservoir identification methods including differential definition method,resistivity increase method and complex reservoir analysis method for locating oil and water zone through analyzing the typical correspondence between fluid characteristics and well loggings.