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The AAPG/Datapages Combined Publications Database
Houston Geological Society Bulletin
Abstract
Abstract: Jolliet Field Development, Structure,
and Stratigraphy - A Deep Water Milestone,
Green Canyon, Gulf of Mexico,
Offshore Louisiana
By
The Jolliet Field is believed to be the first development in the offshore U.S. Gulf of Mexico to exploit a major reverse fault trap. With the world's first tension leg well platform (TLWP) set in 1760 ft. (536 m.) of water on the upper continental slope, the field has also set a water depth record for a production platform.
The field's multiple stacked reservoirs consist of unconsolidated Pleistocene lowstand fan grain flow, debris flow, and turbidite deposits. Regionally, the area is structurally dominated by four major salt diapirs. The field is structurally complicated by an underlying salt ridge, a major syndepositional reverse fault, and late normal faults.
Reverse fault documentation includes 3-D seismic
interpretation, repeated paleontological markers, prediction
and correlation of up to 3000 ft. (914 m.) of repeated pay
section, as well as slope stability computer
modeling
. One
well repeated 18 of 23 known reservoir sands in the subthrust. However, syndepositional movement along the
fault created an expanded subthrust section relative to the
paleohigh of the overthrust section.
A structural model is presented suggesting that the
reverse fault developed at the toe of a major salt flank
growth fault. The fault was initiated during the Lower
Pleistocene as the sediment slope was diapirically oversteepened.
The resultant failure surface was cylindrically
constrained by salt at its lateral limits and by higher density
Pliocene shale at depth. This model is supported by slope
stability computer modeling
using realistic sediment
strengths, densities, and pore pressure gradients.
Unnumbered Figure. GC 184 Jolliet Field Structure Section.
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