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Shale Gas Reservoir Characterization and Sweet Spot Prediction
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, First EAGE/AMGP/AMGE Latin-American Seminar in Unconventional Resources, Nov 2017, Volume 2017, p.1 - 4
Abstract
The characterization of shale gas formation is rapidly gaining prominence as a result of the increasingly important role of unconventional reservoirs in South China. Engineering practices such as horizontal drilling and hydraulic fracturing in shale gas formation has created a need for volumetric quantification not only of fracturing but of other geomechanical properties such as Young’s Modulus, Poisson’s Ratio, and maximum horizontal stress direction, in addition to more conventional reservoir properties such as lithology, brittleness, TOC and porosity as input for reservoir simulations. An integrated study of the well Zhao-104 and surrounding wide-azimuth 3D seismic volume within the shale gas reservoir in South China has been conducted with the objective of generating shale formation properties related to fracture orientation and intensity in the area and deriving such reservoir rock properties. The multi-attribute data fusion process to integrate all “sweet spot” parameters, such as shale formation depth, thickness, fault and fracture zone intensity and distribution, TOC and its thickness distribution, local stress field and its orientation, formation brittleness, pressure coefficient, impedance, Passion’s ratio, Young’s modules, porosity distribution, was used to predict “sweet spot” for shale gas reservoir exploration and production.