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ABSTRACT: Ramos, St. Mary, and Assumption Parishes, Louisiana Significant Reserves Added to a Forty-Two Year Old Field

BROEKSTRA, BRADLEY R., and DAVID R. ANDERSON , Burlington Resources, Houston, TX

Ramos Field was discovered in 1957 with a successful completion of the British American #1 Intracoastal Shipyard. Prior to recent discoveries, and through mid 1999, Ramos had cumulative production of 62.8 BCFG, and l.8 MMBL from Middle Miocene aged sediments. This relative low volume for a faulted four-way structure lead credence to shoot a 3D survey to help unravel a complex fault pattern, and aid in future placement of wells.

In late 1997, Burlington Resources, and the Meridian Resources Corporation underwrote, and shot 120 square miles of 3D seismic covering parts of 16S-12E, through 16S-14E, and 17S-13E through 17S-14E St. Mary, Terrebonne and Assumption Parishes, Louisiana.

Ramos Field is located at a juncture where several major faults merge, creating the Lower Middle Miocene shelf slope break in this put of Louisiana. Expansion across the faulting is almost 2.5/1.

In the late 1950's British America et al developed the upthrown north-dipping Rob Chambersi sediments. Most of the production to date has come from these reservoirs. In the mid 1960's Amerada Hess attempted four tests on the downthrown side of the Ramos fault system. They had minor success in younger south-dipping Operc sands.

Inadequate subsurface and 2D control precluded the recently drilled syncline separated paleo crest from being recognized. In Jan 1999 Meridian and Burlington spud the #1 C.M. Thibodeaux in section 36-16S-13E. The new discovery well was drilled to 19,270 and penetrated five productive expanded Operc sand sections totaling 221 feet of net pay with an average 23% porosity. Pay sands ranged from 17,590 through 19,200.

Both companies agree adequate 3D coverage is responsible for recognizing this previously undrilled paleo structure.

 

AAPG Search and Discovery Article #90908©2000 GCAGS, Houston, Texas