Abstract: 3-D Seismic Structural Model for Tengiz Field, Kazakstan - Fault Geometry and Implications for Hydrocarbon Production

HANSON, R. A.; M. Z. MUSAGALIEV; and O. N. PETROVA

Tengiz Field is a supergiant oil field currently under development and producing over 15000 tons / day of 46 degree oil from a Carboniferous age carbonate platform. Located in the North Caspian Basin, the Tengiz structure measures over 18 by 15 km and contains a 1500 meter oil column.

Data gathered and interpreted since the April 1993 start of Tengizchevroil's work in Kazakstan has begun to clarify the relation of structural geometry to the productivity of Tengiz oil wells. Since the beginning of the project, workers at Tengizchevroil have combined western and Soviet data in order to plan field development. Well logs, seismic data, core descriptions, and interpretations have been digitized, translated and integrated with new logs and VSP data.

Recent interpretations show that seismic discontinuities internal to the platform influence well production less than larger discontinuities that define the boundaries between platform core, rim and flanks. Maximum well productivity generally coincides with a zone along the platform rim. This zone has been targeted for future development using reprocessed 3D seismic data shot in 1982-85. A new 3-D seismic survey scheduled to begin in late 1997 will provide additional structural and stratigraphic control for future drilling.

AAPG Search and Discovery Article #90942©1997 AAPG International Conference and Exhibition, Vienna, Austria