基于油水分流原理的密闭取心饱和度校正方法  

Sealed Coring Saturation Correction Method Based on Oil-water Diffluence Principles

作　　者：王玉环[1] 

机构地区：[1]中国石化股份胜利油田分公司地质科学研究院,东营257015

出　　处：《科学技术与工程》2014年第9期39-43,共5页Science Technology and Engineering

基　　金：国家科技重大专项(2011ZX05011)资助

摘　　要：为力求准确求取密闭取心井油水饱和度,在分析流体饱和度损失变化的主要影响因素的基础上,以覆压岩石孔渗压缩校正为基础,以油水相渗分流率计算原理为核心,建立了密闭取心井由于孔隙及油水体积变化和降压脱气排液造成流体饱和度损失变化的数学校正模型。为油层损失前真实油水饱和度的校正提高了可靠的依据,具有重要的理论和实用意义。The use of sealed coring wells to analyze oil-water saturation is the most direct and effective method to obtain the oil-water saturation of a reservoir. However, due to the volume change of the pores of the rock and the oil-water within it, decompression deaeration clean-up, drilling fluid invasion and fluid volatilization during the process of coring, experimental measurements of the sum of oil-water saturation are generally only 75% to 85%. There are great losses of oil-water saturation. On the basis of the analysis of the main factors affecting fluid satura- tion loss changes, based on porosity and permeability compression correction of overburden rocks, using oil-water phase permeability diffluence rate calculation principle as the core, the mathematical correction model of sealed co- ring wells due to pores and oil-water volume c cause fluid saturation losses and changes. This ration before oil layer losses and has important hanges is established and decompression deaeration clean-up which provides a reliable basis for the correction of the real oil-water satu- theoretical and practical significance.

关 键 词：饱和度校正 密闭取心井 降压脱气 分流率 孔隙体积 

分 类 号：TE357.8[石油与天然气工程—油气田开发工程]