富气混相驱中液化气回采量计算方法研究  

Calculation Method for Liquefied Petroleum Gas(LPG) Recovery in Rich Gas Miscible Displacement

作　　者：张恒汝[1] 李闽[2] 

机构地区：[1]西南石油大学计算机科学学院,四川成都610500 [2]西南石油大学油气藏地质及开发工程国家重点实验室,四川成都610500

出　　处：《石油天然气学报》2013年第1期145-148,178,共4页Journal of Oil and Gas Technology

摘　　要：在注富气混相驱项目中,注入了一定比例的液化气和干气混合物,部分注入的LPG与地层原油混相后被回采。在混相驱效果评价时需要计算回采的LPG量。结合富气混相驱项目研究了一种计算LPG回采量的方法。该方法根据数值模拟中输出各组分的产出摩尔量,匹配出在总的产出物中地层原油的产出量。然后在总的产出物中扣除地层原油产出部分,再结合注入LPG和干气的摩尔组成,建立超定方程组,最后利用最小二乘法计算出回采的LPG量。In a rich gas miscible displacement project,a mixture of certain proportion of LPG and dry gas was injected,and part of LPG was recovered after LPG was mixed with formation oil.When the effect of displacement was evaluated,the amount of LPG recovery needed to be calculated.A method of calculating the amount of LPG recovery was studied based on the miscible displacement project.The method can calculate the output of the formation oil according to molar output of each component in the numerical simulation,deduct part of the formation oil in the total output,in combination with LPG and dry gas molar composition,the over-determined equations are established.The amount of LPG recovery is calculated by the least square method.

关 键 词：富气混相驱 LPG回采量 数值模拟 最小二乘法 

分 类 号：TE357.45[石油与天然气工程—油气田开发工程]