--> ABSTRACT: Applications of 3D Seismic to Field Development Planning, by R. Buchanan, P. A. Ruitenberg, and P. A. B. Marke; #91022 (1989)
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Applications of 3D Seismic to Previous HitFieldNext Hit Development Planning

R. Buchanan, P. A. Ruitenberg, P. A. B. Marke

Today, three-dimensional (3D) seismic is playing an increasingly important role in Previous HitfieldNext Hit appraisal and development planning. Experience from over 100 3D surveys clearly demonstrates that major changes in volumetric reserve estimates result from using 3D rather than closely spaced 2D seismic. These changes are of such a magnitude (±30% average change for 10 North Sea fields, for instance) that to proceed with development without the benefit of detailed 3D interpretation exposes projects to significant risk of suboptimal investment. Previous HitExamplesNext Hit demonstrate the revisions in appraisal and development strategy resulting from 3D surveys.

The wealth of Previous HitdataNext Hit present in 3D surveys is often underutilized, for instance, by only interpreting a fraction of the Previous HitdataNext Hit set. Interpretation of all lines is essential in order to bring out subtle tectonic features and reservoir geometry. Previous HitExamplesTop are given of the use of horizon amplitude maps to interpret very minor faults and lenzoid and channelized sand bodies and to delineate hydrocarbon accumulations.

In the future, routine attribute mapping will enable 3D seismic to have an even bigger impact on development strategy. Quantification of seismic in terms of physical properties such as net thickness, porosity, and pore content will attain new levels of accuracy and reliability. The use of time-lapse seismic will help to monitor production response and guide development drilling.

AAPG Search and Discovery Article #91022©1989 AAPG Annual Convention, April 23-26, 1989, San Antonio, Texas.