摘要
目前测井系列下薄差水淹层测井解释的符合率很低,远远不能满足油田挖潜需求。从目前测井系列出发,针对主要影响因素,提取多项反映水淹特征的判别指标,通过指标的模式结构分析,提出了简单易行的距离判别方法,明确了影响薄差油层解释符合率的主要因素是测井曲线垂向分辨率低、井眼扩径、钻井液侵入及孔隙度测井误差,实现了水淹级别的定性判断。经取心井高、中、低、未4个水淹级别验证,解释符合率高达79%,较过去提高10%以上,为老区挖潜提供了重要技术支持。
In the current logging series, the coincidence rates of the well logging interpretation for the thin and poor waterflooded layers are very low and moreover can not meet the requirements of the oilfield potential tapping. From the viewpoint of the present logging series, in the light of the main influencing factors, the discriminating in- dexes for responsing the watered-out characteristics are extracted, and furthermore through analyzing the modal structures of these indexes, the simple and feasible distance-discriminating method is presented, and moreover the main influencing factors on the interpretation are made clear： low vertical resolution of the logging curves, expan- ding of the borehole diameters, mud invasion and porosity logging errors, thus the qualitative discrimination of the waterflooded levels is realized. According to the high, medium, low, non flooded discriminating levels for the coring wells, the interpretation coincidence rate is as high as 79% ; comparing with the past, the value has reached more than 10%. All the achievements have provided the important technical support for the old-block potentials tapping.
出处
《大庆石油地质与开发》
CAS
CSCD
北大核心
2015年第2期154-158,共5页
Petroleum Geology & Oilfield Development in Daqing
基金
国家自然科学基金项目(51234007)
长江学者和创新团队发展计划(IRT1294)
中央高校基本科研业务费专项资金(11CX05005A)
关键词
薄差水淹层
影响因素
判别分析
测井解释
模式结构
挖潜
thin and poor waterflooded layer
influencing factor
discrimination and analysis
well logging interpretation
model structure
potential tapping
