低渗、特低渗轻质油藏溶解气驱气体流动临界饱和度研究——以中原油田为例  

Study on gas critical gas saturation of dissolved gas flooding in light oil reservoir with low permeability and ultra-low permeability--by taking Zhongyuan oilfield as an example

作　　者：高志飞 许寻 王坤 袁广均 GAO Zhifei;XU Xun;WANG Kun;YUAN Guangjun(Exploration&Development Research Institute of Zhongyuan Oilfield Company,SINOPEC,Puyang,Henan 457000,China)

机构地区：[1]中国石化中原油田分公司勘探开发研究院,河南濮阳457000

出　　处：《石油地质与工程》2021年第3期63-66,72,共5页Petroleum Geology and Engineering

基　　金：中国石化科技项目“银额盆地拐子湖地区油气成藏主控因素与有利目标评价”(P19022-1)。

摘　　要：气体流动临界饱和度是溶解气驱过程中的重要参数,以中原油田为例,利用PVT、长岩心物理模拟实验研究了低渗、特低渗两种物理模型的溶解气驱开发特征。结果表明,在地层温度、压力条件下,挥发性油藏低渗物理模型达到气体流动临界饱和度时所对应的地层压力(拟泡点压力)为饱和压力(泡点压力)的69.63%,此时气体饱和度为23.78%;黑油油藏特低渗物理模型达到气体流动临界饱和度时所对应的地层压力为饱和压力的47.84%,气体饱和度为30.90%;气体流动临界饱和度与拟泡点压力均异于现有文献资料中的数值。The critical saturation of gas flow is an important parameter in the process of dissolved gas flooding.Through PVT and long core physical simulation experiment methods,the development characteristics of dissolved gas flooding in two physical models of low permeability and ultra-low permeability are studied.The results show that under the condition of formation temperature and pressure,when the low permeability physical model of volatile oil reservoir reaches the critical gas flow saturation,the corresponding formation pressure(pseudo bubble point pressure)is 69.63%of the saturation pressure(bubble point pressure),and the gas saturation is 23.78%.The formation pressure corresponding to the critical gas flow saturation of the physical model of in black oil reservoir with ultra-low permeability is 47.84%of the saturation pressure,and the gas saturation is 30.90%.The critical saturation and pseudo bubble pressure of gas flow are both different from those in the literature.

关 键 词：气体流动临界饱和度 拟泡点压力 长岩心实验 溶解气驱 

分 类 号：TE341[石油与天然气工程—油气田开发工程]