Size distributions are available in
several ways, including:
-
Distributions
by field or reservoir size rank
-
Distributions
by size class
-
Cumulative
probability and log-probability distributions
-
Spatial
distributions by size class
-
Cumulative
distributions by rank or size class
-
Distributions
of play size by amount or size class
An extensive range of
recent recovery
growth
information is available, including:
-
Distributions
of recent field or reservoir absolute and percentage growth
-
Correlations
of recent growth with size and year of discovery
-
Correlations
of recent growth with various reservoir rock and fluid characteristics
-
Correlations
of recent growth with development intensity
-
Correlations
of growth histories with oil and gas price trends
-
Calculations
of historic growth factors
-
Comparisons
of recent growth among plays
Reservoir rock and fluid characteristics
can be displayed
as basic distributions, scatter plots with linear regressions, distributions by
period of discovery or size class, and spatial distributions. Available
characteristics include:
- Area
- Thickness
- Depth
-
Porosity
and permeability
-
Initial
saturations
-
Natural
drive mechanism
-
Initial
pressure temperature
-
API
gravity and sulfur content
-
Oil
pour point and viscosity
-
Hydrocarbon
gas composition
-
Non-hydrocarbon
gas composition
-
Gas
heating value and specific gravity
-
Formation
water resistivity
A broad array of multivariate displays,
such as porosity-depth, porosity-permeability, area and thickness, porosity and
initial water saturations, API gravity and temperature, and non-hydrocarbon gas
composition, temperature, and lithology are also available.
Production histories
are available in
a variety of formats, including:
-
Distributions
of field or reservoir histories by product
-
Summations
by various geographic, geologic, or temporal groupings
-
Normalized
production profiles of recent discoveries
-
Correlations
of production with sizes, growth, period of discovery, and reservoir rock
characteristics
-
Distributions
and comparisons among plays by product
-
Distributions
and comparisons among plays by specific play type, by geologic province, and by
region
Discovery histories
can be provided
in several forms, including:
-
Basic
order of discovery by completion date
-
Cumulative
discovery curves by number and amount discovered
-
Average
size and distribution of sizes by period of discovery
-
Spatial
patterns of discovery over time
-
Rank
order of discovery relative to size, area, depth, or water depth
-
Order
of discovery relative to oil and gas prices
-
Discoveries
by operator
Measures of
development intensity and
economics
available include:
-
Well
spacing
-
Average
recovery per well
-
Post-primary
oil recovery methods
-
Crude
oil recovery factors
-
Reservoir
depth and water depth
A variety of drilling histories can
be created:
-
Annual
drilling histories for individual plays
-
Spatial-temporal
patterns of drilling within plays
-
Comparative
drilling histories among plays (especially by province or specific play type or
among specific play types)
-
Correlation
of play drilling histories with play production
-
Correlation
of play drilling histories with oil and natural gas prices
-
Drilling
histories by reservoir within plays (correlated with reservoir production)
Distributions of well productivity
can be developed
by combining the Well Cross- Reference Table with well production data:
-
Distributions
of initial 12 or 24 months standardized production histories by play
-
Spatial
patterns of standardized production by productivity groups within plays (and
using these patterns to define subplays)
-
Changes
over time (effects of improved technology) in standardized production within
subplays
-
Correlation
of standardized production with water cut and spatial patterns of water cut
