--> ABSTRACT: Defining Geological Model of Hidden Thin Sands Reservoir within Crosswell Seismic Using Multi-Atribute Seismic and Petrophysical Analysis Bunyu Field - East Kalimantan Indonesia

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Defining Geological Model of Hidden Thin Sands Reservoir within Crosswell Seismic Using Multi-Atribute Seismic and Petrophysical Analysis Bunyu Field - East Kalimantan Indonesia

Ringoringo, Adi 1; Caruso, Enrico 2
(1) Geology and Geophysics, PT. PERTAMINA, Jakarta, Indonesia. (2) BPMIGAS, Jakarta, Indonesia.

Delta deposits of Tarakan - Santul Formation within Bunyu Oil Field contain of tens of thin sands reservoir. Some of them are hidden. These thin sands have 1 - 18 meter thick. The top of Bunyu oil field is covered by several sequence of interbeded coal layer. Some of single thin layer has average production about 6000 bopd since 2009; and it has achieved more than one million barrel of oil up to now.

Some of the conventional previous acquired 3D seismic could not be utilized. Such condition is caused by thick weathered zone and high noise absorption. As a result micro fracture and fault appearance and thin layer reservoir could not be detected. As a result there are many unsolved hidden sandstone reservoir correlation.

Combination of multi attribute model of crosswell seismic data, reverse VSP and petrophysical of hundreds wells provide better understanding how the thin sandstone of delta deposits distribute and other upside potential sandstone reservoir.

The purpose of this paper is to show how to define the reservoir change and its depositional pattern into geological model and approving other upside potential reservoir determination beyond the existing reservoir of Tarakan at Bunyu field - Kalimantan Indonesia.

 

AAPG Search and Discovery Article #90135©2011 AAPG International Conference and Exhibition, Milan, Italy, 23-26 October 2011.