摘要
渤海X油田生产层位为新近系的明化镇组和馆陶组,生产中发现部分产油层电阻率为6～8Ω·m、部分产水层电阻率为10～20Ω·m,这与油田开发中确定的测井下限和油水系统认识不符。该油田高阻高含水储层特征分析表明润湿性影响着测井解释成果,通过统计回归得到了润湿指数I_w与饱和度指数n的关系,进而对Archie公式进行了润湿性修正。实例应用表明,利用修正后的Archie公式可以准确识别储层的含油性,对于渤海海域油田后续调整和储量复算具有指导意义。
Neogene Minghuazhen and Guantao Formation are the producing intervals in X oilfield, Bohai sea, in which oil zones with 6-8 Ω·m resistivity and water zones with 10-2 0 Ω·m resistivity were found during production, not coinciding with the logging thresholds and knowledge of oil-water system identi- fied during development of the oilfield. An analysis of the reservoirs with high resistivity and water cut in the oilfield has indicated that the parameter wettability may have influences on well logging interpreta- tion. Thus a relationship between the wettability index I_w and the saturation exponent n was obtained through a statistical regression, and a wettability modification was made in Archie equation. According to the actual application, the modified Archie equation can accurately recognize the oil potential of reser- voirs, providing a guiding principle for the subsequent adjustment and reserves recalculation in Bohai sea oilfields.
出处
《中国海上油气》
CAS
CSCD
北大核心
2015年第1期62-67,共6页
China Offshore Oil and Gas
基金
国家科技重大专项"海上油田丛式井网整体加密油藏工程技术示范(编号:2008ZX05057-003)"部分研究成果
关键词
渤海
高阻
高含水
储层特征
润湿性
Archie公式
公式修正
Bohai sea
high resistivity
high water cut
reservoir characteristics
wettability
Arehie equa-tion
equation modification
