Application of Multirate Tests to Scale Management: Part 1--Interpretation of Produced-Water Analyses
- Ross A. McCartney (Oilfield Water Services Limited) | Tore Tjomsland (Statoil ASA) | Bernt Sandøy (Statoil ASA) | Finn H. Fadnes (Statoil ASA)
- Document ID
- Society of Petroleum Engineers
- SPE Production & Operations
- Publication Date
- May 2012
- Document Type
- Journal Paper
- 211 - 222
- 2012. Society of Petroleum Engineers
- 5.6.1 Open hole/cased hole log analysis, 4.1.2 Separation and Treating, 4.3.4 Scale, 4.1.5 Processing Equipment, 1.8 Formation Damage, 3 Production and Well Operations, 3.3.1 Production Logging, 2.4.3 Sand/Solids Control
- produced water analyses, Multi-rate separator test, Production logging
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- 582 since 2007
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Several multirate separator tests (MRTs) have been undertaken on wells in the Veslefrikk field that are on commingled production from the Brent Group and Intra Dunlin Sand. During these tests, produced-water samples were also collected. Integrated analysis of the results of interpretion of the produced-water analyses and the MRT results have provided a range of information for each production zone including the nature and composition of the produced water, seawater fraction of these produced waters, fraction of total water flow being produced, pressure, productivity index, oil and water rates, and water cut. This information can reduce the need for deploying production-logging tools (PLTs), allows the scaling potential between the deeper and the shallower zones to be evaluated, aids squeeze-treatment design, is beneficial for predicting formation damage from crossflow, and aids water-shutoff decisions.
In this paper, the methods of interpreting the produced-water analyses are presented through the use of a field example. To aid interpretation, interpretation of other produced-water analyses from the field and reactive-transport modeling have been undertaken to better understand reactions occurring in the reservoir as a result of seawater injection and the effects of these reactions on produced-water compositions. In an accompanying paper (Tjomsland et al. 2011), the integrated MRT-analysis techniques are described and the results and applications of additional field examples are presented.
|File Size||3 MB||Number of Pages||12|
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