In the US Gulf of Mexico, Wireline deployed the latest generation of reservoir fluid sampling technology for Shell to reduce uncertainty in the evaluation of a recent deepwater exploration success. The MDT* modular formation dynamic tester, configured with the InSitu Density* reservoir fluid density, InSitu Viscosity* reservoir fluid viscosity and InSitu Color* reservoir fluid color sensor measurements, was used to collect over 17 gallons of uncontaminated reservoir fluid. The relatively large, high quality fluid sample provided the customer with one of multiple assurances necessary to advance the project from exploration to development. Also, the variety of measurements made on the fluid during the sampling process reduced the lab analysis time for the project by approximately two weeks.
In Australia, Wireline Dielectric Scanner* multifrequency dielectric dispersion technology was used for ConocoPhillips for the first time to provide reliable water saturation measurements in a reservoir with complex mineralogy. The calculation of water saturation in this reservoir has been challenging due to the effects of the mineralogy on conventional resistivity measurements. Dielectric Scanner technology was able to provide irreducible water saturation in an oil-based mud environment independent of resistivity logs, core analysis data, and water salinity analysis, and helped the customer reduce uncertainty on critical reservoir parameters.
In Qatar, Wireline Sonic Scanner* acoustic scanning platform technology using a Borehole Acoustic Reflection Survey (BARS) was deployed for Total E&P Qatar to evaluate formations from the borehole through casing. The data acquired with this technology provided reliable imaging up to 100 ft away from the borehole, allowing integration of the images with 3D surface seismic. The ability of the BARS technique to evaluate formation features and reflectors behind casing enables improved well placement and optimized well completion in mature fields through the side-tracking, or redesign of existing wells.
In South Texas, Wireline ThruBit* logging services were deployed to workover a horizontal well after water production became excessive. A ThruBit memory tool, including density, porosity, sonic and resistivity sensors, was pumped through the workover tubing into the openhole completion. The resulting data indicated that the water production originated from a single set of fractures, which were subsequently plugged.
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