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Carbonate Reservoir Characterization and Simulation: Previous HitfromNext Hit Facies to Flow Units, Case Study Previous HitfromNext Hit Tarim Basin, Previous HitChinaNext Hit

Ran Zhang
University of Houston, Houston, TX

Lun Nan field is an upper Cambrian to lowest Silurian carbonate buildup in the Tarim Basin of western Previous HitChinaNext Hit. Carbonates Previous HitfromNext Hit this reservoir were deposited in a variety of marine environments ranging Previous HitfromNext Hit tidal flats to reefs. The original texture and porosity of the reservoir carbonates are highly variable depending on the depositional environments. Both the depositional and diagenetic processes at the scale of high-resolution sequence stratigraphy (parasequence level) have the strongest effect on carbonate-reservoir flow units and their petrophysical properties. Previous HitDataNext Hit used in the study include logs, cores, borehole image logs, and Previous Hit3-DNext Hit acoustic impedance values Previous HitfromNext Hit Previous HitinversionNext Hit of Previous HitseismicNext Hit Previous HitdataNext Hit. Outcrop studies have also been used to understand the performance of this reservoir, which can provide stratigraphic and sedimentologic information. High-frequency sequence-stratigraphic interpretation, guided by a depositional model derived Previous HitfromNext Hit description of cores and outcrops, was accomplished using a necessary combination of well logs and Previous HitseismicNext Hit Previous HitdataNext Hit. The sequence-stratigraphic interpretation served as input for the multiple iterative Previous HitseismicNext Hit inversions and provided the framework for the integrated Previous Hit3-DTop geologic model. An object-based stochastic approach was used to build 3D stratigraphic and lithofacies frameworks and model the external geometries of this carbonate reservoir. Internal geometries were incorporated by building 3D porosity, permeability and water saturation distribution models using various stochastic simulation methods. Geostatistical models were verified, selected and extracted to upscale for flow simulation study. The integrated reservoir characterization provides a basis for improving reservoir evaluation, enhancing production management, and improving understanding of the depositional controls on this carbonate reservoir.


AAPG Search and Discovery Article #90072 © 2007 AAPG and AAPG European Region Conference, Athens, Greece