Departmental Seminar

Improved Characterization of Thin Bed and Low-Resistivity/Low-Contrast Hydrocarbon Reservoirs

Mr Hijaz Hasan
Applied Math's Department

Developing Low-Resistivity/Low-Contrast (LRLC) reservoirs for hydrocarbon production requires multi-scale flow properties analysis to reduce uncertainty in reserves estimation. To date, properties at millimeter and centimeter scale are less examined due limited well logging resolution used to measure flow properties. This study applies Micro-CT imaging and Digital Core Analysis software (MANGO and MORPHY) to calculate porosity and permeability of millimeter and centimeter beddings within samples from a Malaysian LRLC reservoir.

Five sand dominated mini plugs extracted from five heterogeneous core plugs were imaged into 3D models using Micro-CT Imaging and the porosity and permeability calculated using DCA software. A New England Research (NER) tool measures the permeability of thin beddings on the core plugs. It is shown that most of the mini plugs have higher calculated permeability using DCA than the core plug permeability measured using conventional Routine

Core Analysis (RCA). Permeability measurement of the thin beddings using the NER tool indicate high permeability contrast between adjacent sandstone and mudstone beddings. Meanwhile, DCA porosity is consistent with RCA results. This study indicates different permeability results between millimeter and centimeter scales compared to the larger core plug scale Further studies are required to upscale small-scale flow properties of LRLC rocks to investigate their effects on effective flow properties and hydrocarbon reserves.

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