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Drilling and early testing of a sidetrack from the slant hole completion test well

Conference ·
OSTI ID:5287762
;
During the winter of 1990 to 1991, the Department of Energy evaluated several options to completing the originally-planned slant hole production tests. A decision was made to sidetrack the original hole and to redrill the 60 and 90{degrees} sections. The objectives for drilling the sidetrack to the original slant hole wellbore are as follows: (1) Test high angle and horizontal drilling and completion technologies as an alternative to vertical wells and hydraulic fracture treatments in tight, naturally-fractured reservoirs. (2) Production test the Cozzette open-hole interval into the pipeline to determine long-term gas productivity. (3) Production test selected paludal sandstones in the 60{degrees} section of the wellbore to determine long term gas productivity. A complex well path was designed to parallel the optimum northerly azimuth and the high angle-horizontal inclination program, but to directionally drill the lower wellbore 1000 ft to the east of the old hole. The hole displacement was planned to avoid formation damage from over 1500 barrels of drilling mud lost in the first well. Figure 1 presents the Mesaverde geologic column near the wellsite.
Research Organization:
CER Corp., Las Vegas, NV (United States)
Sponsoring Organization:
DOE; USDOE, Washington, DC (United States)
DOE Contract Number:
AC21-90MC26024
OSTI ID:
5287762
Report Number(s):
DOE/MC/26024-92/C0019; CONF-920584--5; ON: DE92014224
Country of Publication:
United States
Language:
English

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Related Subjects

03 NATURAL GAS
030300* -- Natural Gas-- Drilling
Production
& Processing
440400 -- Well Logging Instrumentation
47 OTHER INSTRUMENTATION
COAL DEPOSITS
COAL SEAMS
DIRECTIONAL DRILLING
DRILLING
DRILLING EQUIPMENT
DRILLING RIGS
EQUIPMENT
GEOLOGIC DEPOSITS
MINERAL RESOURCES
MWD SYSTEMS
NATURAL GAS WELLS
PRODUCTIVITY
RESOURCES
ROCKS
SANDSTONES
SEDIMENTARY ROCKS
WELL COMPLETION
WELLS