Estimating oil/water relative permeability at SAGD steam chamber edge

Nader Mosavat, Adel Mohsenzadeh, Yahya Al-Wahaibi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)

Abstract

Fluid flow at the edge of SAGD chamber where most of bitumen drainage occurs is of great importance. In this region, water condensate co-flows with the falling bitumen towards the production well. Since the bitumen viscosity varies at different locations due to temperature gradient across the edge of steam chamber, new correlations are required to consider the influence of fluid viscosity on the relative permeability curves. In this study, the objective is to remedy this deficiency by developing a new set of correlations for relative permeability estimation addressing in particular such effect at SAGD steam chamber edge. Various datasets from literature were obtained at different temperatures and oil viscosities. The data were used to develop new correlations which are a modification of the well-known Corey's equations for relative permeability estimation. Two mathematical approaches were applied and evaluated to achieve the best correlations: (1) at each temperature, herein substituted by viscosity ratio, relative permeabilities are functions of saturation, and (2) relative permeability is a function of viscosity ratio at a fixed saturation. Furthermore, different mathematical equations were used in the regression procedure in order to optimize the objective function and achieve the most reliable correlations. Results indicated a combined power and quadratic functionality of relative permeability to the phases' viscosity. The viscosity ratio was used in the new correlations as a dimensionless parameter which represents fluids' viscosities at different temperatures. The new correlations were compared against the original Corey's equations for various experimental datasets. Various statistical error formulation were employed: average relative error, average absolute relative error, root mean squared, correlation coefficient, and standard deviation. The accuracy of the new correlations was also graphically compared with Corey's model using cross-plot illustrations. Comparative evaluation of these correlation error analyses revealed that relative permeability estimations have been significantly improved when new correlations were employed which incorporate different temperature profiles and accordingly the viscosity variations. The application of the new correlation could improve the flow prediction in thermal simulators.

Original languageEnglish
Title of host publicationSociety of Petroleum Engineers - SPE Heavy Oil Conference and Exhibition 2016
PublisherSociety of Petroleum Engineers
ISBN (Electronic)9781510844827
Publication statusPublished - Jan 1 2016
EventSPE Heavy Oil Conference and Exhibition 2016 - Kuwait City, Kuwait
Duration: Dec 6 2016Dec 8 2016

Other

OtherSPE Heavy Oil Conference and Exhibition 2016
CountryKuwait
CityKuwait City
Period12/6/1612/8/16

Fingerprint

Steam
Oils
asphalt
Viscosity
permeability
viscosity
Water
oil
water
bitumen
Temperature
Fluids
saturation
Thermal gradients
Drainage
fluid
Flow of fluids
temperature
condensate
Simulators

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Geochemistry and Petrology

Cite this

Mosavat, N., Mohsenzadeh, A., & Al-Wahaibi, Y. (2016). Estimating oil/water relative permeability at SAGD steam chamber edge. In Society of Petroleum Engineers - SPE Heavy Oil Conference and Exhibition 2016 Society of Petroleum Engineers.

Estimating oil/water relative permeability at SAGD steam chamber edge. / Mosavat, Nader; Mohsenzadeh, Adel; Al-Wahaibi, Yahya.

Society of Petroleum Engineers - SPE Heavy Oil Conference and Exhibition 2016. Society of Petroleum Engineers, 2016.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Mosavat, N, Mohsenzadeh, A & Al-Wahaibi, Y 2016, Estimating oil/water relative permeability at SAGD steam chamber edge. in Society of Petroleum Engineers - SPE Heavy Oil Conference and Exhibition 2016. Society of Petroleum Engineers, SPE Heavy Oil Conference and Exhibition 2016, Kuwait City, Kuwait, 12/6/16.
Mosavat N, Mohsenzadeh A, Al-Wahaibi Y. Estimating oil/water relative permeability at SAGD steam chamber edge. In Society of Petroleum Engineers - SPE Heavy Oil Conference and Exhibition 2016. Society of Petroleum Engineers. 2016
Mosavat, Nader ; Mohsenzadeh, Adel ; Al-Wahaibi, Yahya. / Estimating oil/water relative permeability at SAGD steam chamber edge. Society of Petroleum Engineers - SPE Heavy Oil Conference and Exhibition 2016. Society of Petroleum Engineers, 2016.
@inproceedings{afc29e6f553c43958209f332e31fb04b,
title = "Estimating oil/water relative permeability at SAGD steam chamber edge",
abstract = "Fluid flow at the edge of SAGD chamber where most of bitumen drainage occurs is of great importance. In this region, water condensate co-flows with the falling bitumen towards the production well. Since the bitumen viscosity varies at different locations due to temperature gradient across the edge of steam chamber, new correlations are required to consider the influence of fluid viscosity on the relative permeability curves. In this study, the objective is to remedy this deficiency by developing a new set of correlations for relative permeability estimation addressing in particular such effect at SAGD steam chamber edge. Various datasets from literature were obtained at different temperatures and oil viscosities. The data were used to develop new correlations which are a modification of the well-known Corey's equations for relative permeability estimation. Two mathematical approaches were applied and evaluated to achieve the best correlations: (1) at each temperature, herein substituted by viscosity ratio, relative permeabilities are functions of saturation, and (2) relative permeability is a function of viscosity ratio at a fixed saturation. Furthermore, different mathematical equations were used in the regression procedure in order to optimize the objective function and achieve the most reliable correlations. Results indicated a combined power and quadratic functionality of relative permeability to the phases' viscosity. The viscosity ratio was used in the new correlations as a dimensionless parameter which represents fluids' viscosities at different temperatures. The new correlations were compared against the original Corey's equations for various experimental datasets. Various statistical error formulation were employed: average relative error, average absolute relative error, root mean squared, correlation coefficient, and standard deviation. The accuracy of the new correlations was also graphically compared with Corey's model using cross-plot illustrations. Comparative evaluation of these correlation error analyses revealed that relative permeability estimations have been significantly improved when new correlations were employed which incorporate different temperature profiles and accordingly the viscosity variations. The application of the new correlation could improve the flow prediction in thermal simulators.",
author = "Nader Mosavat and Adel Mohsenzadeh and Yahya Al-Wahaibi",
year = "2016",
month = "1",
day = "1",
language = "English",
booktitle = "Society of Petroleum Engineers - SPE Heavy Oil Conference and Exhibition 2016",
publisher = "Society of Petroleum Engineers",

}

TY - GEN

T1 - Estimating oil/water relative permeability at SAGD steam chamber edge

AU - Mosavat, Nader

AU - Mohsenzadeh, Adel

AU - Al-Wahaibi, Yahya

PY - 2016/1/1

Y1 - 2016/1/1

N2 - Fluid flow at the edge of SAGD chamber where most of bitumen drainage occurs is of great importance. In this region, water condensate co-flows with the falling bitumen towards the production well. Since the bitumen viscosity varies at different locations due to temperature gradient across the edge of steam chamber, new correlations are required to consider the influence of fluid viscosity on the relative permeability curves. In this study, the objective is to remedy this deficiency by developing a new set of correlations for relative permeability estimation addressing in particular such effect at SAGD steam chamber edge. Various datasets from literature were obtained at different temperatures and oil viscosities. The data were used to develop new correlations which are a modification of the well-known Corey's equations for relative permeability estimation. Two mathematical approaches were applied and evaluated to achieve the best correlations: (1) at each temperature, herein substituted by viscosity ratio, relative permeabilities are functions of saturation, and (2) relative permeability is a function of viscosity ratio at a fixed saturation. Furthermore, different mathematical equations were used in the regression procedure in order to optimize the objective function and achieve the most reliable correlations. Results indicated a combined power and quadratic functionality of relative permeability to the phases' viscosity. The viscosity ratio was used in the new correlations as a dimensionless parameter which represents fluids' viscosities at different temperatures. The new correlations were compared against the original Corey's equations for various experimental datasets. Various statistical error formulation were employed: average relative error, average absolute relative error, root mean squared, correlation coefficient, and standard deviation. The accuracy of the new correlations was also graphically compared with Corey's model using cross-plot illustrations. Comparative evaluation of these correlation error analyses revealed that relative permeability estimations have been significantly improved when new correlations were employed which incorporate different temperature profiles and accordingly the viscosity variations. The application of the new correlation could improve the flow prediction in thermal simulators.

AB - Fluid flow at the edge of SAGD chamber where most of bitumen drainage occurs is of great importance. In this region, water condensate co-flows with the falling bitumen towards the production well. Since the bitumen viscosity varies at different locations due to temperature gradient across the edge of steam chamber, new correlations are required to consider the influence of fluid viscosity on the relative permeability curves. In this study, the objective is to remedy this deficiency by developing a new set of correlations for relative permeability estimation addressing in particular such effect at SAGD steam chamber edge. Various datasets from literature were obtained at different temperatures and oil viscosities. The data were used to develop new correlations which are a modification of the well-known Corey's equations for relative permeability estimation. Two mathematical approaches were applied and evaluated to achieve the best correlations: (1) at each temperature, herein substituted by viscosity ratio, relative permeabilities are functions of saturation, and (2) relative permeability is a function of viscosity ratio at a fixed saturation. Furthermore, different mathematical equations were used in the regression procedure in order to optimize the objective function and achieve the most reliable correlations. Results indicated a combined power and quadratic functionality of relative permeability to the phases' viscosity. The viscosity ratio was used in the new correlations as a dimensionless parameter which represents fluids' viscosities at different temperatures. The new correlations were compared against the original Corey's equations for various experimental datasets. Various statistical error formulation were employed: average relative error, average absolute relative error, root mean squared, correlation coefficient, and standard deviation. The accuracy of the new correlations was also graphically compared with Corey's model using cross-plot illustrations. Comparative evaluation of these correlation error analyses revealed that relative permeability estimations have been significantly improved when new correlations were employed which incorporate different temperature profiles and accordingly the viscosity variations. The application of the new correlation could improve the flow prediction in thermal simulators.

UR - http://www.scopus.com/inward/record.url?scp=85048056832&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85048056832&partnerID=8YFLogxK

M3 - Conference contribution

BT - Society of Petroleum Engineers - SPE Heavy Oil Conference and Exhibition 2016

PB - Society of Petroleum Engineers

ER -