Evaluation of oil-based mud contamination in reservoir fluids and calculation of uncontaminated fluid
Abstract
Oil-based mud (OBM) is popularly used to increase drilling rates and wellbore stability. However, the filtrate from these fluids contains various additives and is often miscible or partially miscible with reservoir fluid, causing changes to the physical properties and phase behaviours of reservoir fluid samples. The authors analysed the reservoir fluid composition using gas chromatography and evaluated the oil-based mud contamination level in reservoir fluid. Based on the results of this study, VPI-Labs has successfully provided to many clients in Vietnam the contamination evaluation services which earlier could only be performed by overseas labs, thus helping them save much time and costs.
References
Karen Schou Perserson, Peter L.Christensen, Jawad Azeem Shaikh. Phase behavior of petroleum reservoir fluids. CRC Press. 2006: 422 pages.
Pashupati Sah, Karen Schou Pedersen, Gurdev S.Gurdial, Hairul Izwan, Mohd Fadli Ramli. Equation-ofstate modeling for reservoir fluid samples contaminated by oil-based drilling mud using contaminated fluid PVT data. SPE Asia Pacific Oil and Gas Conference and Exhibition, Brisbane, Queensland, Australia. 18 - 20 October, 2010.
CoreLab Perth. Báo cáo phân tích PVT cho giếng khoan số AFL 20070004. 2007.
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