Reservoir characterization

Reservoir-Fluid Geodynamics Enable Insights Into Reservoir Connectivity

The authors of this paper describe reservoir-fluid-geodynamics processes that explain the reasons behind varying oil compositions and properties within and across different reservoir compartments.

Cartoon structure map of the field, where colored circles representwells, orange lines represent faults, and black lines represent contour lines.
Cartoon structure map of the field, where colored circles representwells, orange lines represent faults, and black lines represent contour lines.
Source: IPTC 23723.

Reservoirs often are compartmentalized by barriers, including structural flow barriers resulting from geodynamic processes such as faulting or depositional stratigraphic barriers such as shale breaks. Along with structural geodynamics, reservoir-fluid-geodynamics (RFG) processes such as fluid mixing define fluid systems that respond to their evolving reservoir container. The authors study RFG processes that explain the reasons behind varying oil compositions and properties within and across different reservoir compartments. The complete paper also explores how to infer fluid implications with wireline logging measurements.

Introduction

As reservoir structures change as a result of geodynamic processes such as faulting and fracturing, fault-block migration, anticline formation and growth, halokinesis effects, and diagenesis, reservoir fluids undergo a wide array of RFG processes that are directly affected by changing reservoir structures.

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