Open AccessYushulin Oilfield CO2- Comparison of minimum miscibility pressure test results for crude oil system
Author(s) -
Li Liu,
Yanfu Pi,
Yingjie Liu,
Yingxue Ma,
Xiaojun Qiang,
Jinxin Liu,
Zhenxing Zhang
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/768/3/032022
Subject(s) - miscibility , approximation error , crude oil , carbon dioxide , petroleum engineering , thermodynamics , displacement (psychology) , relative permeability , mathematics , permeability (electromagnetism) , tube (container) , materials science , chemistry , statistics , geology , composite material , physics , polymer , psychology , organic chemistry , porosity , psychotherapist , biochemistry , membrane
Miscible displacement of carbon dioxide in low permeability sandstone reservoirs can greatly improve oil recovery. The minimum miscible pressure is the starting point of miscible flooding. Its determination is very important for oilfield development. In this paper, the error analysis of the results measured by empirical formulas is carried out by the internationally accepted slim tube experiment method. Research results show that the minimum miscibility pressure obtained by slender tube displacement experiment is 22.12 MPa. The maximum, minimum and average miscibility pressures predicted by empirical formula method are 32.33 MPa, 7.85 MPa and 19.76 MPa, respectively. The relative error of the average minimum miscibility pressure predicted by all empirical formulas is 10.67%. The least relative error is the Yelling and Metcalfe correlation method, the relative error is 8.82%.