Identification and Characterization of High-Conductive Layers in Waterfloods
- Bulent Izgec (Chevron) | Shah Kabir (Hess Corporation)
- Document ID
- Society of Petroleum Engineers
- SPE Reservoir Evaluation & Engineering
- Publication Date
- February 2011
- Document Type
- Journal Paper
- 113 - 119
- 2011. Society of Petroleum Engineers
- 4.1.5 Processing Equipment, 3.2.5 Produced Sand / Solids Management and Control, 2.4.3 Sand/Solids Control, 5.4.1 Waterflooding, 4.1.2 Separation and Treating
- Modified-Hall Analysis, Waterflooding, High-Conductive Layers
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- 1,199 since 2007
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This study expands upon the use of modified-Hall analysis (MHA) to discern the characteristics of a high-permeability channel. Briefly, the modified-Hall plot uses three curves involving improved Hall-integral (H-I) and the two derivatives, analytic and numeric. Ordinarily, the derivative curves overlay on the integral curve during matrix injection, but separates lower when fracturing occurs. This work presents a method to identify and characterize high-conductive layers or channels between injector and producer pairs with the MHA. The distance separating the integral and derivative curves provides the required information to quantify channel properties. A simple analytical solution is presented for transforming the separation distance into channel permeability-thickness product.
The analytic derivative is based on the radial-flow-pattern assumption and the numeric derivative is correlated to the pressure response. Therefore, a comparison of these two curves reveals clues about the maturity of a waterflood at a given time. Several simulated examples verified the channel-property-estimation algorithm and identified the distinctive derivative signatures for channeling and fracturing situations. This method is also useful for identification of wormhole propagation during sand production in unconsolidated formations.
|File Size||760 KB||Number of Pages||7|
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