Proving UBD's Value in Brownfields and Beyond

Abstract

fax 01-972-952-9435. AbstractUnderbalanced drilling (UBD) is giving brownfields a new lease on life-while UBD technologies in development hold the promise of drilling the "un-drillable well" and reducing cost.Much of the industry's mindset focuses on traditional drilling and stimulation technologies to exploit brownfields, but we suggest that in many cases the greatest potential for these reservoirs lies in UBD techniques. Emerging methodologies, like managed pressure drilling (MPD), are also moving rapidly into the driller's toolbox to allow him to "walk the line" between extremes in pressure regimes. Or perhaps technologies that reduce the cost of UB drilling and enabling underbalanced completions will be attractive enough to propel the technology across the 'chasm'. This article discusses real benefits of UBD in mature fields and presents an overview of its new technologies in development.Ja n-94 J a n-9 5 J an -9 6 J an -97 J an-98 J an-99 Ja n-00 J a n-0 1 J an -0 2 J an -03 J an-04

Geology Drives Technology - Application of Coil Tubing Underbalanced Drilling in the Cooper Basin, Australia

“…Using the P/z plot outlined in Figure 3 calculates an incremental reserve of 7 Bcf or 3.5% OGIP of the evaluation region, using Equation 4. The current abandonment pressure (P a ) and projected abandonment pressure due to the addition of zero skin CTUBD wells (P UBD ) were calculated to be 545 psi and 432 psi, respectively.…”