火山岩气藏驱动类型特征新认识  

New understanding about characteristics of volcanic rock gas reservoir drive type

作　　者：毕晓明[1] BI Xiaoming(E&D Research Institute,Daqing Oil Field,PetroChina,Heilongjiang Daqing 163712,China)

机构地区：[1]中国石油大庆油田有限责任公司勘探开发研究院,黑龙江大庆163712

出　　处：《非常规油气》2021年第3期10-16,共7页Unconventional Oil & Gas

基　　金：中国石油天然气股份有限公司重大科技专项“深层天然气高效开发技术研究与应用”(2016E-0211)。

摘　　要：正确地认识气藏驱动类型是气藏开发的关键之一。为了搞清徐深气田火山岩气藏的驱动类型,针对火山岩气藏中3种典型驱动类型识别方法(视地层压力、水侵体积系数、视地质储量)的气驱曲线不同于常规气藏的问题,开展了火山岩气藏驱动类型特征方面的研究。结果表明火山岩弹性气驱气藏开发中存在变储量的过程,因此弹性气驱曲线不同于常规定容封闭气藏。视地层压力图中,曲线逐步上翘后直线段延长线与横轴的交点等于井控动态储量;视地质储量图中,视地质储量值向上偏移后逐渐平稳等于井控动态储量;水侵体积系数图中,相对压力系数曲线由斜率-1线以下,逐步接近斜率-1线,直至与斜率-1线重合。同时总结了地质特征、动态特征、单位产量视压降、单位压降产量等识别驱动类型的经验方法。以上成果认识,对正确识别火山岩气藏驱动类型具有指导意义。One of the keys to gas reservoir development is understanding gas reservoir driving type correctly.In order to make sense of Xushen volcanic gas reservoir driving type,for the problem that the elastic gas driver curve of three kinds of typical gas reservoir drive type identification method consists of apparent formation pressure,water invasion volume factor and apparent geological reserves,is different from the conventional gas reservoir in volcanic rock gas reservoir development,to carry out the characteristics of volcanic rock gas reservoir drive type.The results show that:because variable reserves exist in the elastic gas driving development process of volcanic rock,the elastic gas driver curve is different from the conventional gas reservoir.Apparent formation pressure curve figure,curve after gradually become warped on the straight line extension cord and the horizontal axis intersection is equal to the well control dynamic reserves.Apparent geological reserves figure,the apparent geological reserves value after the upward migration gradually smooth is equal to well control the dynamic reserves.Water invasion volume factor diagram,relative pressure coefficient curve by the slope-1 below,gradually close to the slope-1 line,until the line with slope-1.At the same time based on Xushen field characteristics,puts forward the experience method to identify driving type,including geological characteristics,dynamic characteristics,depending on the pressure drop per unit of production,production of unit pressure drop.The above results,the recognition of the volcanic gas reservoir drive type has a guiding significance.

关 键 词：火山岩 驱动类型 弹性气驱 视地层压力 视地质储量 水侵体积系数 

分 类 号：TE371[石油与天然气工程—油气田开发工程]