![]() The geological interpretation of image data is mainly used for structural analysis, fracture characterization, porosity analysis, heterogeneity analysis, rock typing, and facies classification. Pressure transient interpretation of the straddle-packer data corresponded well with the geological features observed from the high-definition images.Ībstract = "Wireline formation microelectrical imaging has been used for many decades to characterize reservoirs. In addition, reservoir permeability data were obtained using pressure transient analysis. The new selected stations enabled proper fluid identification where pressures and samples were obtained. Use of the high-definition data enabled positioning the wireline formation tester at the optimal zones. The data obtained from standard and the high-definition formation imaging are presented and compared. The high-definition formation microelectrical imaging resulted in much better data quality, which enabled the identification of the different geological features. ![]() Conventional formation microelectrical imager data suffered from a huge phase shift, low quality, and low-resolution, withvery few geological features visible. ![]() This new technology was applied in a complex carbonate tight gas reservoir drilled with water-based mud (WBM). A new tool for microelectrical imaging presents a solution to this problem by obtaining high-definition, full-coverage images in formations with moderate to high resistivity. Phase shift, which is common in resistive formations, can result in reversed images, reversed contrast, and pad/flap mismatch, which can render the data unusable. The quality of the data acquired using conventional formation microelectrical imaging tools may be degraded in highly resistive formations even with conductive mud because of the high noise-to-signal ratio, whichcan lead to fuzzy images with very few geological features visible. In addition, formation microelectrical images are commonly needed for complex reservoirs to help with the selection of wireline formation tester straddle packer locations. Wireline formation microelectrical imaging has been used for many decades to characterize reservoirs.
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