Position: Home > Articles > Study on the Non-Darcy Spontaneous Imbitition Model for Low Permeability Reservoirs
Journal of Yangtze University(Natural Science Edition)Agricultural Science Volumn
2015
(26)
50-54+6
低渗透油藏非达西自发渗吸模型研究
作 者：
李勇明;马汉伟;彭瑀;王琰琛
单 位：
油气藏地质及开发工程国家重点实验室(西南石油大学)
关键词：
渗吸;低渗透;非达西流动;启动压力梯度;管流
摘 要：
我国的低渗透油藏分布广、储量大,但物性较差,开采难度较大。自发渗吸可促进裂缝中的水吸入基质从而驱替原油,是水力压裂后形成的裂缝性低渗油藏重要的采油机理。现有模型仅研究了线性渗流下的自发渗吸理论,在前人研究的基础上,考虑非达西效应和启动压力梯度,通过对塑性管流方程进行改进,建立了针对低渗透油气藏的自发渗吸模型,并对该模型进行求解。对比发现,在低渗条件下,新模型相较于Washburn等人基于达西定律推导的常规自发渗吸模型更能体现低渗非线性特征,对分析水驱油影响因素、提高水驱采收率具有重要意义。
译 名：
Study on the Non-Darcy Spontaneous Imbitition Model for Low Permeability Reservoirs
作 者：
Li Yongming;Ma Hanwei;Peng Yu;Wang Yanchen;State Key Laboratory of Oil and Gas Reservoir Geology and Exploration,Southwest Petroleum University;
关键词：
imbibitions;;low permeability;;non-Darcy flow;;starting pressure gradient;;tubing flow
摘 要：
The low permeability reservoirs in China were widely distributed with big reserves,but their properties were poor and difficult for development.Spontaneous imbibitions could be used to improve the imbibitions of water between fractures for oil displacement,it was an important oil recovery mechanism of the fractured low permeability reservoirs after hydraulic fracturing.In the new model,only the spontaneous imbibitions under nonlinear condition were studied.On the basis of predecessor's study,the non-Darcy effect and starting pressure gradient was taken into consideration,it was improved through plastic tubing fluid equation,a spontaneous imbibitions model for low permeability reservoirs was established and it was solved.It is found out by comparison that the new model can present more features of the non-Darcy flow than that of conventional spontaneous model based on Darcy flow given by Washburn,etc,it is of great significance for the analysis of the influential factors of water flooding and improving oil recovery in waterflooding.
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