Oil Recovery Analyses and Formation Water Investigations for High Salinity-Low Salinity Water Flooding in Sandstone Reservoirs

Abstract

Recently, we investigated the effect of Ca2+ in the formation water and its potential on low salinity (LS) water flooding (Al-Saedi et al. 2018). In this paper, we pursue to quantify the influence of formation water containing Ca2+ and Mg2+ on LS EOR. Berean sandstone cores were sequentially flooded with high salinity HS water and LS water at 90°C. During injecting brines, samples of the effluent were analyzed for pH. Oil recovery experiments with a double Ca2+ and Mg2+concentration showed a lower LS water effect, meaning that the cores became more water-wet; however, the LS water effect was much greater when the amount of Ca2+ and Mg2+ in the HS water was decreased by half. The results of this work isolate and relate oil recovery with the most effective factors that control LS water chemical mechanisms.

Meeting Name

SPE Europec featured at 80th EAGE Conference and Exhibition 2018 (2018: Jun. 11-14, Copenhagen, Denmark)

Department(s)

Geosciences and Geological and Petroleum Engineering

Keywords and Phrases

Well flooding; Oil well flooding; Salinity water

Document Type

Article - Conference proceedings

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2018 Society of Petroleum Engineers (SPE), All rights reserved.

Publication Date

01 Jun 2018

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