3-D Geomechanics Workflow Applied to a Tight Gas Turbiditic Field, Colombia

Abstract:

The Lower Magdalena Basin, located in the northwest Colombia, contains gas and oil reserves. Recently, gas prospectivity was established in a shallow sand play (up to 7,000 ft) in the Miocene formation at the south of El Difícil field. The prospective succession is composed of interbedded, laminar and laterally discontinuous deep marine sands embedded in massive claystones. The sands show good-to-moderate porosity and poor permeability. This complex distribution of reservoir properties (porosity, permeability) and rock mechanical properties poses significant technical challenges for drilling and commercial exploitation of gas resources. This paper presents the geomechanics approach applied to well trajectory optimization as a key contribution to the development of tight gas turbiditic assets. A 3D geomechanical model was created through integration of seismic data, local geology, drilling experience, core …

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