油气分离条件对挥发性原油高压物性及采收率的影响——基于工程案例的探究性实验建设  

The influence of oil and gas separation conditions on the PVT properties and recovery efficiency of volatile crude oil:Exploratory experiment construction based on engineering cases

作　　者：付帅师[1,3] 朱永春 韩继凡 李爱芬[1] 肖志朋 刘诗琪 樊冬艳[1] 王增宝[1] FU Shuaishi;ZHU Yongchun;HAN Jifan;LI Aifen;XIAO Zhipeng;LIU Shiqi;FAN Dongyan;WANG Zengbao(School of Petroleum Engineering,China University of Petroleum(East China),Qingdao 266580,China;Research Institute of Exploration and Development,Tuha Oilfield Company,PetroChina,Hami 839009,China;National Key Laboratory of Deep Oil and Gas,China University of Petroleum(East China),Qingdao 266580,China)

机构地区：[1]中国石油大学(华东)石油工程学院,山东青岛266580 [2]中石油吐哈油田分公司勘探开发研究院,新疆哈密839009 [3]中国石油大学(华东)深层油气全国重点实验室,山东青岛266580

出　　处：《实验技术与管理》2023年第9期237-244,共8页Experimental Technology and Management

基　　金：中国石油大学(华东)教学改革项目(CM2022011,YJG2022002,CM2022015);山东省本科教学改革面上项目(M2021305,M2022284);国家自然科学基金优秀青年基金项目(52122402)。

摘　　要：基于挥发性油藏注CO_(2)混相驱开发时出现采收率异常的工程问题,探索研究了油气分离条件对挥发性原油高压物性及采收率的影响。通过高压物性和油气分离实验,解释了采收率异常的原因是脱气时较大的压差使挥发油中轻质组分蒸发严重,导致实测地面脱气油量减少。地面油气分离时采用多级脱气可以有效降低油气分离时挥发油中轻质组分的蒸发程度,减少地面脱气油损失。实验得出了挥发油在地面多级分离时的最优分离器压差,在该压差下分离油气时原油中的轻质组分蒸发程度最小。该研究结果对挥发性油藏地面分离条件的确定有一定指导意义。Based on the engineering problem of abnormal recovery efficiency during the development of CO2 miscible flooding in volatile oil reservoirs,the influence of oil and gas separation conditions on the PVT properties and recovery efficiency of volatile crude oil was explored and studied.Through PVT and oil gas separation experiments,it is explained that the reason for the abnormal recovery efficiency is that the large pressure difference during degassing caused severe evaporation of the light components in the volatile oil,resulting in a decrease in the measured surface degassed oil amount.The use of multistage separation during ground oil and gas separation can effectively reduce the evaporation degree of light components in volatile oil during oil and gas separation,and reduce the loss of ground degassed oil.The optimal separator pressure difference for multistage separation of volatile oil on the ground is obtained through experiments,at which the evaporation degree of the light components in the crude oil is the smallest when separating oil and gas.The research results have certain guiding significance for determining the ground separation conditions of volatile oil reservoirs.

关 键 词：挥发性原油 高压物性 多级脱气 油气分离条件 探究性实验 

分 类 号：TE33[石油与天然气工程—油气田开发工程]