Benchmarking Deep Drilling Technologies

Abstract

Abstract The U.S. Department of Energy (DOE) has undertaken a baseline study designed to provide current drilling technology and cost bench-marks as reference points in evaluating future cost improvements to be derived from technology advancements. Deep formations are one of the sources of natural gas that will play an important role in meeting the growing need for natural gas in the U.S. The Energy Information Agency estimated that 7 % of U.S. gas production came from deep formations in 1999. This contribution is expected to increase to 14 % by 2010. A deep-well database has been completed that categorizes wells by total depth, targeted formation, geographic location, completion technique, and operator. In addition, information was gathered from operators and service companies reporting the current status and future directions of drilling technologies, which was then compiled into a condensed format. Bit and downhole motor and turbine technology have improved significantly over the past several years, leading to faster rates-of-penetration (ROP) for deep wells. Polycrystalline diamond compact (PDC) bit technology is one of the most significant technology improvements in the drilling industry over the last 20 years. Current and proposed well-construction methodologies that should continue to reduce costs of drilling deep and extended-reach wells include solid expandable tubulars and the concept of casing drilling or liner drilling. However, these concepts are still evolving. As these and other new technologies are applied, the results of this benchmarking effort provide the basis upon which future relative progress and cost savings can be identified and measured.