Geology and development of Hewett gas field, United Kingdom North Sea area

Conference · Mon Feb 01 04:00:00 EST 1971 · Am. Assoc. Pet. Geol. Bull.; (United States)

OSTI ID:5864038

Cumming, A D; Wyndham, C L

The Hewett gas field is 15 miles off the Norfolk coast, and has an estimated 3.5 trillion cu ft of recoverable gas contained in 2 Triassic Bunter sandstones. The field was discovered late in 1966 and placed on production in July 1969. By that time, 22 wells had been drilled, permanent offshore and onshore facilities installed, unitization negotiations concluded, and market secured. The contract with the purchaser calls for a gradual increase in daily production to an average rate of 600 MMcf by 1974. The 2 reservoirs are largely coextensive, and the field, roughly elliptical in outline, has a length of 18 miles and a maximum width of 3 miles. Average depth to the middle Bunter Sandstone is 3,000 ft and to the lower Bunter Sandstone is 4,150 ft. Maximum observed gross pay thicknesses are 323 ft (middle) and 202 ft (lower). Both reservoirs have excellent porosity and permeability. The Hewett structure is apparent on seismic profiles and at both bunter levels a fault-bounded, NW.-SE.-trending anticline is present. The gas in the lower Bunter differs from that in the middle bunter in that it is free of hydrogen sulfide.

• Research Organization: Atlantic Oil Producing Co
• OSTI ID: 5864038
• Report Number(s): CONF-710364-
• Conference Information: Journal Name: Am. Assoc. Pet. Geol. Bull.; (United States) Journal Volume: 55:2
• Country of Publication: United States
• Language: English

Related Subjects

03 NATURAL GAS
030200* -- Natural Gas-- Reserves
Geology
& Exploration
ATLANTIC OCEAN
CHALCOGENIDES
DIMENSIONS
DRILLING
EUROPE
GEOLOGIC DEPOSITS
GEOLOGIC TRAPS
GEOLOGY
HYDROGEN COMPOUNDS
HYDROGEN SULFIDES
MINERAL RESOURCES
NATURAL GAS DEPOSITS
NATURAL GAS FIELDS
NATURAL GAS WELLS
NORTH SEA
PERMEABILITY
POROSITY
PRODUCTION
RESOURCES
ROCKS
SANDSTONES
SEAS
SEDIMENTARY ROCKS
SULFIDES
SULFUR COMPOUNDS
SURFACE WATERS
THICKNESS
UNITED KINGDOM
WELL DRILLING
WELLS
WESTERN EUROPE