Schlumberger

Industry Article: Microfibers Hold Everything in Place

A new fiber-based fracturing technology ensures uniform proppant distribution and boosts production in a tight US Rockies gas well.

Publication: E&P
Volume: November
Issue: 2005
Publication Date: 11/01/2005

Among the operators in the US Rocky Mountains, BP America Production Co. (BP) continually searches for technologies that will help to improve production results from the complex tight gas plays that lace the region. To this end, it recently applied the Schlumberger FiberFRAC technology in the mature Jonah field, Green River Basin, Wyoming, and enjoyed a 35% increase in cumulative production from the newly stimulated well over its first 60 days on stream. This translates into an incremental gain of 35 MMscf of natural gas, or USD 210,000 based on a USD 6/Mscf gas price. While BP has employed Schlumberger stimulation services in Jonah field for over a decade, the late 2004 through early 2005 project described herein represents the company’s first onshore US use of the fiber-based stimulation technology, which is designed specifically to enhance proppant distribution in tight gas applications. Located in the southwestern corner of Wyoming, Jonah field is a large, structurally complex, wedge-shaped fault trap within the northwestern portion of the Green River Basin. It primarily produces from overpressured, tight sandstones in the upper cretaceous Lance Formation. The Lance Formation is a stacked sequence of fluvial channel sands that are interbedded with siltstones and floodplain shales. Gross interval thickness ranges from 2,800 ft to more than 3,600 ft (854 m to 1,098 m). Individual sandstone bodies occur as 10-ft to 20-ft (3-m to 6-m) thick channels within stacked channel sequences that can be greater than 200 ft (60 m) thick. The low permeabilities of the small individual pay sands within such large gross intervals present the largest reservoir development challenge.



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