Flashcards: Reservoir Heterogeneity and Anisotropy Fundamentals — 20 cards

Rock geometry principles — definition?

Fundamental rules describing spatial arrangement of rocks.

Porosity — role?

Indicates the reservoir's fluid storage capacity.

Surface area — significance?

Affects fluid-rock interactions and capillary forces.

Rock compressibility — mechanism?

Volumetric change in response to pressure variations.

Permeability — what?

Rock's ability to transmit fluids.

Heterogeneity — effect?

Creates spatial variation in reservoir properties.

Reservoir homogeneity — meaning?

Uniform distribution of properties throughout the reservoir.

Vertical heterogeneity — impact?

Affects vertical flow and recovery strategies.

Permeability variation — measurement?

Quantified by metrics like V and Lorenz coefficient.

Areal heterogeneity — definition?

Lateral variation of properties across the reservoir.

Geostatistical interpolation — purpose?

Estimate unknown values using spatial data and correlation.

Rock anisotropy — cause?

Layering, mineral alignment, or microfractures.

Isotropy — property?

Uniform properties in all directions.

Anisotropy — property?

Different properties depending on measurement direction.

Dykstra-Parsons V — what?

Metric quantifying permeability heterogeneity.

Lorenz coefficient — significance?

Indicates degree of reservoir heterogeneity.

Vertical heterogeneity — key factor?

Layering and stratification affecting flow.

Permeability distribution — typical?

Often log-normal, skewed toward higher values.

Homogeneity — how measured?

Using uniformity coefficient and large-scale property consistency.

Surface area & porosity — relation?

Both influence fluid storage and interactions.