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Novel Non-Dynamite Application Of The Accelerated Impact Source for 2D and 3D Seismic Exploration Surveys in the Indonesia Central Sumatra Basin Region.

Proceedings Title : Proc. Indon. Petrol. Assoc., 40th Ann. Conv., 2016

Two of the most common seismic energy sources used by the geophysical industry for land 2D and 3D exploration surveys have been Vibroseis and explosives, particularly for application to the exploration of oil and gas. On many land seismic surveys that are located over challenging terrain and environmentally sensitive areas it can be extremely costly, difficult, or impossible to consider using Vibroseis or explosives energy sources. A less common, but much improved alternative seismic energy source is the high performance Accelerated Impact Source (AIS) system. This paper introduces AIS systems development and performance attributes for use on 2D and 3D oil & gas seismic surveys. An AF750-AIS 3D seismic Survey method combined with the use of the recently developed OYO-GSX cable-free seismic data acquisition systems was conducted within an active Palm Plantation at Southern Mahato-Petapahan area, Central Sumatra Basin. The Survey covered 24 square kilometer area and was carried out as part of a renewed exploration program. The objective of the 3D seismic survey is to improve delineation and characterization of complex shallow and basement depth stratigraphic and fault controlled geo-structural petroleum traps and reservoir systems. The project operation attributes and seismic data results are presented in terms of environmental impact, survey design and acquisition operations, overall performance, and seismic data quality. The results of 3D AIS show reasonably comparable quality with the existing 2D seismic data. Some of the strong deep reflectors can be observed and become an aid to map the main interval of interest. Additionally, the structural features such as basement, faults, and anticlinal traps are relatively clear to be identified. From the operational point of view, the AIS is proven to be more economical and environmentally friendly energy source, especially when combined with the use of the recently developed cable-free seismic data acquisition systems.

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