CORRELATIONS FOR ESTIMATING CHANGE IN RESIDUAL OIL SATURATION DURING LOW SALINITY WATER FLOODING

Abstract

Prior to embarking on a laboratory and subsequently pilot test for a potential improved oil recovery scheme in a green or brown field, it is important to have a sense of potential gains from the available options. This is usually done using correlations. Whereas there had been existing models for use in making these approximations [1], this work has developed a robust correlation for use in estimating the potential reduction in residual oil saturation post OPTSWF (and consequently additional recovery) as a function of change in IFT, change in salinity, porosity, permeability, start residual oil saturation, and API gravity of the crude oil. This was done for a field in the Niger Delta. The model was tested against available data and showed good correlation with a correlation of coefficient ranging from 99.36% to 99.89%. Also, the performance of the model was tested alongside that proposed by [1] and in all cases, the model developed by this work performed better with lower RMS errors.

Keywords

• Improved Oil Recovery
• Optimized Salinity Waterflooding
• Modelling
• Core Flooding
• Niger Delta

CORRELATIONS FOR ESTIMATING CHANGE IN RESIDUAL OIL SATURATION DURING LOW SALINITY WATER FLOODING

Abstract

Bir laboratuvara girişmeden ve ardından yeşil veya kahverengi bir alanda potansiyel iyileştirilmiş bir petrol geri kazanım şeması için pilot test yapmadan önce, mevcut seçeneklerden potansiyel kazançlar hakkında fikir sahibi olmak önemlidir. Bu genellikle korelasyonlar kullanılarak yapılır. Bu tahminlerin yapılmasında [1] kullanılmak üzere mevcut modeller varken, bu çalışma, IFT'deki değişikliğin bir fonksiyonu olarak OPTSWF sonrası artık petrol doygunluğundaki potansiyel azalmanın (ve dolayısıyla ek geri kazanımın) tahmin edilmesinde kullanılmak üzere sağlam bir korelasyon geliştirmiştir. tuzluluk, gözeneklilik, geçirgenlik, başlangıç ​​artık petrol doygunluğu ve ham petrolün API gravitesindeki değişiklik. Bu Nijer Deltası'ndaki bir tarla için yapıldı. Model, mevcut verilere karşı test edilmiş ve% 99,36 ile% 99,89 arasında değişen bir katsayı korelasyonu ile iyi bir korelasyon göstermiştir. Ayrıca, modelin performansı [1] tarafından önerilenle birlikte test edildi ve her durumda, bu çalışma ile geliştirilen model daha düşük RMS hataları ile daha iyi performans gösterdi.

Keywords

• İyileştirilmiş Yağ Geri Kazanımı
• Optimize Edilmiş Tuzluluk Suyu Taşması
• Nijer Deltası

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