Horizontal well drilled into deep, hot Austin chalk

Journal Article · Mon Apr 03 04:00:00 EDT 1995 · Oil and Gas Journal

OSTI ID:28039

Pearce, D ^[1]; Johnson, M; Godfrey, B ^[2]

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1. Union Pacific Resources Co., Houston, TX (United States)
2. Drilex Systems Inc., Houston, TX (United States)

Bent-housing steerable downhole motors helped maintain course for a deep, hot, horizontal well in the Austin chalk. The Navasota Unit No. 1 was planned as a B zone, single downdip lateral, Austin chalk horizontal well with a maximum departure from vertical of 3,767 ft and a planned total depth (TD) of 17,342 ft measured depth (MD)/14,172 ft TVD. The Austin chalk was found significantly deeper in this well than planned, which resulted in an actual TD of 17,899 ft MD/14,993 ft TVD, the deepest (TVD) horizontal well in the Austin chalk to date. The well was spudded on August 6, 1994, and took 52 days to reach TD. The static bottom hole temperature was almost 350 F. The paper describes the well plan, drilling results, and the lateral section.

• OSTI ID: 28039
• Journal Information: Oil and Gas Journal, Journal Name: Oil and Gas Journal Journal Issue: 14 Vol. 93; ISSN OIGJAV; ISSN 0030-1388
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
03 NATURAL GAS
DIRECTIONAL DRILLING
DRILLING FLUIDS
NATURAL GAS WELLS
PLANNING
PROCESS CONTROL
RESERVOIR TEMPERATURE
TEXAS
WELL CASINGS
WELL COMPLETION