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Abstract: Application of Deepwater Outcrop Analog Previous HitDataNext Hit to 3-D Reservoir Modeling: An Previous HitExampleNext Hit from the Diana Previous HitFieldNext Hit, Western Gulf of Mexico

Sullivan, Morgan and Foreman, Lincoln - Exxon Production Research Co., DeVries, Mike - Exxon Exploration Co., Khan, Arfan - Exxon Co. USA

Architectural styles of sandbodies deposited in deepwater settings are highly variable and this variability in sandbody geometry and continuity affects both the exploration and production potential of deep-water sandstones. Outcrops span a critical gap in both scale and resolution between seismic Previous HitdataNext Hit and well-bore Previous HitdataNext Hit. Dimensional and architectural Previous HitdataNext Hit from outcrops can therefore be used to help populate 3-D reservoir models which will be used to predict well performance, connected volumes and recovery efficiencies for newly discovered fields. To assist with reserve assessments and optimization of depletion strategies for the development of the Diana Previous HitFieldNext Hit, deepwater outcrop analog Previous HitdataNext Hit were integrated with seismic and well Previous HitdataNext Hit to produce a detailed 3-D geologic model for more accurate reservoir characterization.

The Diana Previous HitFieldNext Hit is located in the western Gulf of Mexico in approximately 4700 ft of water and has in excess of 100 MOEB of recoverable hydrocarbons from the Upper Pliocene A-50 reservoir. The situation presented at the Diana Previous HitFieldNext Hit is a common one: a hydrocarbon reservoir expressed by a single-cycle seismic event and by three appraisal wells spaced thousands of feet apart. There is, however, excellent core coverage which enables close calibration of seismic and well Previous HitdataNext Hit. Integration of seismic, well and core Previous HitdataNext Hit suggests a relatively channelized reservoir in an updip position becoming a more sheet-like and layered down dip. This subsurface Previous HitdataNext Hit did not have the resolution to provide the dimensional and architectural Previous HitdataNext Hit required to condition the geologic model for flow simulation and well-performance prediction.

To solve these uncertainties, deepwater outcrop analog Previous HitdataNext Hit from comparable basin floor fan systems were integrated with the seismic and well Previous HitdataNext Hit from the Diana Previous HitFieldNext Hit. Bed scale reservoir architectures were quantified with photo-mosaics and by correlation of closely spaced measured sections. Bed continuity, connectivity and vertical and lateral facies variability Previous HitdataNext Hit were also collected as these factors ultimately control the reservoir behavior. From these measurements, a spectrum of channel dimensions and shapes were compiled to condition the modeled objects. These Previous HitdataNext Hit were compared to Diana specific seismic and well Previous HitdataNext Hit and adjusted accordingly. The advantage of the resulting Diana geologic model is that it incorporates geologic interpretation, honors all available Previous HitdataTop and models the reservoir as discrete objects with specific dimensions, facies juxtaposition and connectivity. This effort provides the framework for optimal placement of wells to maximize the architectural and facies controls on reservoir performance.

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