Surface gas detector can enhance fluid evaluation

摘要

Technology can correct for changes in temperature during reservoir evaluation. When Weatherford introduced the GC-TRACER surface gas detector, the technology became - and remains - the only gas detection system that can measure gases directly from the mud and that has the ability to correct for changes in temperature. Prior to its introduction, conventional gas-agitator traps were considered the primary method for extracting mud gas. "Disadvantages to this method include prolonged exposure to air, resulting in preferentially extracting lighter end alkanes and retention of a considerable amount of gas in die mud, especially in oil-based mud," said David Tonner, Weatherford's director of global sales. "These disadvantages can lead to costly misinterpretation of fluid typing in the reservoir. Deepwater operations accentuate the problem due to the cooling effect of water on the riser."