基于吸水剖面资料的优势通道分类方法——以孤东油田为例  

Preferential flow path classification method based on injection profile data-taking Gudong oilfield as an example

作　　者：王森[1] 冯其红[1] 宋玉龙[1] 王鹏[1] 陈德坡[2] 唐从见[2] 

机构地区：[1]中国石油大学(华东)石油工程学院,山东青岛266555 [2]中国石化胜利油田分公司地质科学研究院,山东东营257015

出　　处：《油气地质与采收率》2013年第5期99-102,118,共4页Petroleum Geology and Recovery Efficiency

基　　金：中国石化科技攻关项目"中高渗透水驱油藏整体深部调驱技术研究"(P10072)

摘　　要：针对目前优势通道分类方法仅考虑绝对指标而忽略相对指标的缺陷,以孤东油田为研究对象,根据不同级别优势通道渗流状态及其不同的分布形式,采用数值模拟与油藏工程相结合的方法,利用相对吸水量和吸水强度比2个相对指标绘制孤东油田优势通道分类图版,同时还考虑了优势通道发育级别较高时可能出现的非达西渗流特征,将优势通道划分为优势通道发育不明显储层、普通高渗透层、强高渗透条带和大孔道4个级别。该图版克服了常规分类方法的缺陷,充分体现了优势通道的相对概念,并且只需要吸水剖面资料即可完成优势通道的分类和级别划分,方便有效,有利于现场的推广应用。将基于吸水剖面资料的优势通道分类方法应用于孤东油田七区西Ng63+4开发单元,判别结果与时变油藏数值模拟结果、示踪剂测试结果相吻合,从而验证了该方法的可靠性。In response to overcome shortcomings of the existing approaches for thief zone classification which concentrates on the absolute index while ignoring relative index, we take Gudong oilfield as the investigation object, employ numerical simulation and reservoir engineering method, and establish type curve for thief zone classification with relative injection rate and injection intensity ratio, on the basis of distinct flow principles, we form different thief zone evolution levels. Moreover, the non-Darcy flow is also taken into account which may occur for severer level, and then the thief zone is classified into four levels: non-thief zone, normal high-permeability layer, high-permeability streak and high-capacity channel. The type curve has conquered the limitations of conventional method, and completely demonstrated the relativity of thief zone, and only injection profile is needed to make the classification, which is very convenient for oilfield application. It has been used to Gudong Ng63+4development unit, and the classification result is in good accordance with time-dependent reservoir numerical simulation and tracer test, which has substantiated its validity.

关 键 词：优势通道 非达西渗流 图版法 相对吸水量 吸水强度 孤东油田 

分 类 号：TE341[石油与天然气工程—油气田开发工程]