Horizontal drilling and completion report in the Clinton sandstone
A joint effort between Belden & Blake Corporation and the U.S. DOE resulted in the drilling and completion of the Central Waste 14, which is the first horizontal well successfully drilled and stimulated in the Silurian Clinton Sandstone in Ohio. The Central Waste 14 (CW 14) is located in Smith Township/Mahoning County which is one of the better remaining areas for Clinton Sandstone developmental drilling. The CW 14 was spudded October 18, 1993, and drilled to a total measured depth of 6,505 feet. Production casing (4.5 inch) was run to TD and successfully cemented on December 9, 1993. Approximately 1,320 feet of the Clinton Sand interval was drilled at a maximum inclination of 91.8 degrees. The mudlog indicated approximately 730 feet or 55% of this interval appeared to be productive pay. Total Clinton interval footage greater than 85 degrees was approximately 1,142 feet. The 1,320 feet of Clinton interval drilled was less than the 2,000 feet planned; however, Belden & Blake was still satisfied since as originally proposed the lateral reach was long enough to attempt at least three hydraulic fracturing stages. The overall directional drilling operation was successful but was severely hampered by contractor mechanical failures and inefficiencies, some of which were considered non-technical in nature, and others which were a direct result of a harsh air drilling environment in an extremely hard and abrasive formation. The technical issues from these failures clearly indicate that this industry still needs a total air drilling system including motors, bits, and steering to cost effectively drill in formations similar to the Clinton Sand. The completion operation included three induced hydraulic fracturing treatments that were performed over a period from 7/18/94 through 10/25/94. The first and third stages successfully placed approximately 100,000 pounds of proppant per stage in approximately 60,000 gallons of fluid at maximum sand concentrations of 6 lb/gallon utilizing a 40 lb crosslinked gel system at rates in the order of 20 barrels per minute. The middle stage experienced excessive treating pressures which allowed only 16, 000 pounds of proppant in 60,000 gallons of gelled fluid to be pumped.
- Research Organization:
- USDOE Federal Energy Technology Center, Morgantown, WV (United States)
- Sponsoring Organization:
- USDOE Assistant Secretary for Fossil Energy, Washington, DC (United States)
- DOE Contract Number:
- AC21-91MC28240
- OSTI ID:
- 293397
- Report Number(s):
- DOE/MC/28240-5521; ON: DE97002187
- Resource Relation:
- Other Information: PBD: Jul 1997
- Country of Publication:
- United States
- Language:
- English
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