相态模型中确定C7-C38碳数组含量的方法  

DETERMINING METHOD OF THE C7-C38 CARBON ARRAY CONTENT IN THE PHASE MODEL

作　　者：赵国忠[1] 匡铁[1] 刘勇[1] 佟斯琴[1] 

机构地区：[1]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：《大庆石油地质与开发》2015年第6期106-109,共4页Petroleum Geology & Oilfield Development in Daqing

基　　金：中国石油天然气股份有限公司科学研究与技术开发项目"气驱提高采收率技术"(2012E-1216)

摘　　要：CO_2驱数值模拟不仅需要成熟配套的商业化组分模拟软件,还要求相态模型能准确描述CO_2与原油体系的PVT性质。而原油组成复杂,实验室检测只能确定部分组成的摩尔分数,无法准确确定重碳数组的摩尔分数,导致相态模型使用的原油组成与真实数据存在一定偏差,影响了相态模型的可靠度。通过数学建模方法,利用已有实验室分析结果,求解重碳数组的摩尔分数,实现细致准确描述原油各组成含量,提高了相态模拟结果的可靠度。Carbon dioxide flooding numerical simulation not only needs the mature and matched commercialized component simulating softwares, but also requires the phase model which can accurately describe the PVT proper- ties of the carbon dioxideand crude oil system. But the composition of the crude oil is very complicated, the molar fraction of the part of the composition can be only determined in the laboratory test, on the contrary, the one of the heavy carbon array can＇t be made sure, thus there exists a certain deviation between the crude oil composition used in the phase model and real data, therefore the reliability of the phase model is influenced. Through mathematical modeling method, based on the analyses of the laboratory results, the molar fraction of the heavy carbon array can be solved, the contents of each composition in the crude oil can be accurately described in detail, so the reliability of the phase simulation can be enhanced.

关 键 词：原油相态 碳数组 CO2驱 数值模拟 

分 类 号：TE348[石油与天然气工程—油气田开发工程]