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Title: Recovery Efficiency Test Project: Phase 1, Activity report. Volume 1: Site selection, drill plan preparation, drilling, logging, and coring operations

The recovery Efficiency Test well project addressed a number of technical issues. The primary objective was to determine the increased efficiency gas recovery of a long horizontal wellbore over that of a vertical wellbore and, more specifically, what improvements can be expected from inducing multiple hydraulic fractures from such a wellbore. BDM corporation located, planned, and drilled a long radius turn horizontal well in the Devonian shale Lower Huron section in Wayne County, West Virginia, demonstrating that state-of-the-art technology is capable of drilling such wells. BDM successfully tested drilling, coring, and logging in a horizontal well using air as the circulating medium; conducted reservoir modeling studies to protect flow rates and reserves in advance of drilling operations; observed two phase flow conditions in the wellbore not observed previously; cored a fracture zone which produced gas; observed that fractures in the core and the wellbore were not systematically spaced (varied from 5 to 68 feet in different parts of the wellbore); observed that highest gas show rates reported by the mud logger corresponded to zone with lowest fracture spacing (five feet) or high fracture frequency. Four and one-half inch casting was successfully installed in the borehole and was equipped to isolatemore » the horizontal section into eight (8) zones for future testing and stimulation operations. 6 refs., 48 figs., 10 tabs.« less
Authors:
; ;
Publication Date:
OSTI Identifier:
10121393
Report Number(s):
DOE/MC/22002--3041-Vol.1
ON: DE92001115
DOE Contract Number:
AC21-85MC22002
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: Apr 1987
Research Org:
BDM Corp., Morgantown, WV (United States)
Sponsoring Org:
USDOE, Washington, DC (United States)
Country of Publication:
United States
Language:
English
Subject:
03 NATURAL GAS; NATURAL GAS WELLS; WELL DRILLING; HYDRAULIC FRACTURING; DIRECTIONAL DRILLING; PLANNING; BOREHOLES; SHALES; DEVONIAN PERIOD; SITE SELECTION; WEST VIRGINIA; DRILL CORES; WELL LOGGING; EXPERIMENTAL DATA 030300; DRILLING, PRODUCTION, AND PROCESSING