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Geochemical Evaluation of Low Salinity Hot Water Injection to Enhance Heavy Oil Recovery from Carbonate Reservoirs

Title
Geochemical Evaluation of Low Salinity Hot Water Injection to Enhance Heavy Oil Recovery from Carbonate Reservoirs
Author
이지호
Keywords
Low salinity water injection; Hot water injection; Wettability modification; Geochemical reaction; Viscosity reduction
Issue Date
2018-11
Publisher
SPRINGEROPEN
Citation
PETROLEUM SCIENCE, v. 16, no. 2, page. 366-381
Abstract
Although low salinity water injection (LSWI) has recovered residual oil after the conventional waterflood, highly viscous oil has remained in heavy oil reservoirs. Hot water injection is an economic and practical method to improve oil mobility for viscous oil reservoirs. It potentially controls temperature-dependent geochemical reactions underlying the LSWI mechanism and oil viscosity. Therefore, this study has modeled and evaluated a hybrid process of low salinity hot water injection (hot LSWI) to quantify synergistic effects in heavy oil reservoirs. In comparison to seawater injection (SWI) and LSWI, hot LSWI results in more cation ion-exchange (Ca2+ and Mg2+) and more wettability modification. Hot LSWI also reduces oil viscosity. In core-scaled systems, it increases oil recovery by 21% and 6% over SWI and LSWI. In a pilot-scaled reservoir, it produces additional oil by 6% and 3% over SWI and LSWI. Probabilistic forecasting with uncertainty assessment further evaluates the feasibility of hot LSWI to consider uncertainty in the pilot-scaled reservoir and observes enhanced heavy oil production. This study confirms the viability of hot LSWI due to synergistic effects including enhanced wettability modification and oil viscosity reduction effects.
URI
https://link.springer.com/article/10.1007%2Fs12182-018-0274-6https://repository.hanyang.ac.kr/handle/20.500.11754/120555
ISSN
1672-5107; 1995-8226
DOI
10.1007/s12182-018-0274-6
Appears in Collections:
RESEARCH INSTITUTE[S](부설연구소) > ETC
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