Two-riser system improves drilling at Auger prospect

Journal Article · Mon Feb 10 04:00:00 EST 1992 · Oil and Gas Journal; (United States)

OSTI ID:5738986

Gonzalez, R; Marsh, G L; Ritter, P B; Mendel, P E ^[1]

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1. Shell Offshore Inc., New Orleans, LA (US)

This paper reports on a two-rise system (TRS) for drilling deepwater development wells which eliminates some of the limitations of conventional subsea technology and allows flexibility in well programs. Shell Offshore Inc.'s deep exploratory wells in Garden Banks 426 and 471 have encountered drilling problems that were attributed to limitations in casing sizes imposed by conventional subsea drilling systems. These problems are not uncommon in exploratory deepwater, deep well drilling in the Gulf of Mexico. Reservoir depths of up to 19,500 ft true vertical depth (TVD) and 7-in. production casing requirements led to potentially troublesome and expensive well plans. Because of the constraints placed on the development drilling program by completion requirements and directional drilling, a two-riser system was designed and fabricated. Solving such significant drilling problems has reduced overall development costs.

• OSTI ID: 5738986
• Journal Information: Oil and Gas Journal; (United States), Journal Name: Oil and Gas Journal; (United States) Vol. 90:6; ISSN OIGJA; ISSN 0030-1388
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
020700 -- Petroleum-- Economics
Industrial
& Business Aspects
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
030600 -- Natural Gas-- Economic
Industrial
& Business Aspects
COST
DESIGN
DRILLING
EXPLORATORY WELLS
FABRICATION
OFFSHORE DRILLING
OFFSHORE PLATFORMS
WELL CASINGS
WELL COMPLETION
WELL DRILLING
WELLS