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Title: Salinity, temperature, oil composition, and oil recovery by waterflooding

Abstract

The effect of aging and displacement temperatures and brine and oil composition on wettability and the recovery of crude oil by spontaneous imbibition and waterflooding has been investigated. This study is based on displacement tests in Berea sandstone with three crude oils and three reservoir brines (RB`s). Salinity was varied by changing the concentration of total dissolved solids (TDS`s) of the synthetic brine in proportion. Salinity of the connate and invading brines can have a major influence on wettability and oil recovery at reservoir temperature. Oil recovery increased over that for the RB with dilution of both the initial (connate) and invading brine or dilution of either. Aging and displacement temperatures were varied independently. For all crude oils, water wetness and oil recovery increased with increase in displacement temperature. Removal of light components from the crude oil resulted in increased water wetness. Addition of alkanes to the crude oil reduced the water wetness, and increased oil recovery. Relationships between waterflood recovery and rate and extent of oil recovery by spontaneous imbibition are summarized.

Authors:
;  [1]
  1. Univ. of Wyoming, Laramie, WY (United States)
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
549423
Resource Type:
Journal Article
Journal Name:
SPE Reservoir Engineering
Additional Journal Information:
Journal Volume: 12; Journal Issue: 4; Other Information: DN: Paper presented at the 1996 SPE annual technical conference and exhibition, October 6--9, Denver, CO (US); PBD: Nov 1997
Country of Publication:
United States
Language:
English
Subject:
02 PETROLEUM; WATERFLOODING; FLUID MECHANICS; OIL WELLS; ENHANCED RECOVERY; SALINITY; TEMPERATURE DEPENDENCE; CHEMICAL COMPOSITION; PETROLEUM; BRINES; WETTABILITY; SANDSTONES; PARAMETRIC ANALYSIS; EXPERIMENTAL DATA

Citation Formats

Tang, G Q, and Morrow, N R. Salinity, temperature, oil composition, and oil recovery by waterflooding. United States: N. p., 1997. Web. doi:10.2118/36680-PA.
Tang, G Q, & Morrow, N R. Salinity, temperature, oil composition, and oil recovery by waterflooding. United States. https://doi.org/10.2118/36680-PA
Tang, G Q, and Morrow, N R. 1997. "Salinity, temperature, oil composition, and oil recovery by waterflooding". United States. https://doi.org/10.2118/36680-PA.
@article{osti_549423,
title = {Salinity, temperature, oil composition, and oil recovery by waterflooding},
author = {Tang, G Q and Morrow, N R},
abstractNote = {The effect of aging and displacement temperatures and brine and oil composition on wettability and the recovery of crude oil by spontaneous imbibition and waterflooding has been investigated. This study is based on displacement tests in Berea sandstone with three crude oils and three reservoir brines (RB`s). Salinity was varied by changing the concentration of total dissolved solids (TDS`s) of the synthetic brine in proportion. Salinity of the connate and invading brines can have a major influence on wettability and oil recovery at reservoir temperature. Oil recovery increased over that for the RB with dilution of both the initial (connate) and invading brine or dilution of either. Aging and displacement temperatures were varied independently. For all crude oils, water wetness and oil recovery increased with increase in displacement temperature. Removal of light components from the crude oil resulted in increased water wetness. Addition of alkanes to the crude oil reduced the water wetness, and increased oil recovery. Relationships between waterflood recovery and rate and extent of oil recovery by spontaneous imbibition are summarized.},
doi = {10.2118/36680-PA},
url = {https://www.osti.gov/biblio/549423}, journal = {SPE Reservoir Engineering},
number = 4,
volume = 12,
place = {United States},
year = {Sat Nov 01 00:00:00 EST 1997},
month = {Sat Nov 01 00:00:00 EST 1997}
}