Abstract Spatial distribution of sand bodies with the capacity of storing hydrocarbons follows complex patterns in reservoirs deposited in fluvial environments. Understanding this distribution is one of the most important factors to consider in the planning and management of any development strategy. Usually, a vertical distribution of the sand bodies is obtained from well logs, core description, and outcrops added with sedimentation and depositional modeling using different techniques. This information is transferred to 2D and 3D stratigraphic models in correlations and stratigraphic panels. Despite of model depuration and tuning with development information, uncertainty is still very high. The acquisition of 3D multi-component seismic information was defined as the tool to reduce this uncertainty in the volumetric distribution of sand bodies and their connectivity, to build the geometry of the reflectors with the wave field P, identifying the lithology and the presence of fluids. A pilot of this technology was designed in the Tenerife field (Middle Magdalena Valley Basin, Colombia) focused in obtaining information of the Mugrosa formation, of Oligocene age, composed basically by sandstone deposited in thin fluvial channels, primarily meandering. To obtain the planned outcome, a high density design (480,000 traces / km2) was developed to allow a sufficient relation signal/noise in the S wave. Non conventional field tests allowed the design of the parameters of charge from the energy source and the depth of the receptors. For the static solutions, multi-component "upholes" and the description of the shot point (SP) where tested to allow a geological model of the strata that could be related with the velocities of the P wave and S wave. The innovative design for the management of the combination of seismic attributes of the S wave and P wave has shown considerable advantages in the definition of the sand bodies in fluvial environments as heterogeneous as this case. This innovation opens immense possibilities for the development of similar fields in the Middle Magdalena Valley Basin as in other regions of the world with similar deposits.
Tópico:
Seismic Imaging and Inversion Techniques
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FuenteSPE Latin American and Caribbean Petroleum Engineering Conference