--> Abstract: Roncador Field, Appraisal and Development Planning, by K. Pádua, M. Mihaguti, C. Stank, and C. Soares; #90933 (1998).

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Abstract: Roncador Field, Appraisal and Development Planning

Pádua, Kleber; Mauro Mihaguti; Carlos Stank and Carlos Soares - Petrobras E&P

Roncador is a large (OOIP greater than 1 billion sm3) deep water (water depth from 1500 to 2000 m) field with a complex hydrocarbon distribution located in the northern part (120 km of São Tome Cape) of the prolific Campos Basin, Brazil.

The discovery well was drilled in October 1996 and showed a potential initial oil production rate of around 2000 sm3 /d with a 31° API oil gravity.

The field appraisal is currently underway and because of the geological uncertainties and operational risks it requires the construction of potential production forecast under various probable scenarios.

An interdisciplinary study is performed, together with the drilling of appraisal wells, to plan the optimum field development and the exploitation strategy. The study is based on integrated 3-D full field geologic/reservoir simulations which encompass surface and sub-surface facilities. The work incorporates dynamically the data from appraisal wells and estimates the field performance under diverse geologic models, fluid behavior, reservoir characteristics, drive mechanisms, completion schemes, production configurations and surface facilities.

The results led to the design of a phased approach (early production system, Module 1, 2 and 3) with different alternatives depending on the geological scenario and the hydrocarbon characteristics. This would favor the financial planning and minimize the geological and operational risks of the project.

They also suggest a water injection secondary recovery process encompassing vertical, deviated, horizontal and multilateral wells with the purpose of maintaining reservoir pressure above the bubble point, accelerating the production and reducing the number of wells (slots).

The early production system, designed to accelerate first oil and reservoir characterization, is scheduled to come on stream by the end of 1998. Module 1 is scheduled to come on stream next year with a peak of oil production of 180 MSBOD by the year 2000. Both schemes, with floating production system (FPS) and subsea wells, are flexible enough to accommodate some new information from the appraisal phase, allowing some optimization.

The poster presents the planning for the overall field exploitation, including the early production scheme and Module 1 and the technological constraints to overcome the water depth problems.

AAPG Search and Discovery Article #90933©1998 ABGP/AAPG International Conference and Exhibition, Rio de Janeiro, Brazil