In developing the Basin and Play Evaluation Service, Nehring Associates has created dozens of standardized retrievals and displays of the key building blocks for analysis. In determining which retrievals and displays to develop, we chose those which best inform a broad range of upstream and midstream strategic decisions. The scope of potential choices is summarized below:
Size distributions are available in several ways, including:
- Distributions by size rank
- Distributions by size class
- Cumulative probability and log-probability distributions
- Spatial distributions by size class
- Cumulative distributions by rank or size class
An extensive range of recent recovery growth information is available, including:
- Distributions of recent 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
- Calculation of historic growth factors
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 is available, 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.
Production histories are available in a variety of formats, including:
- Distribution of field or reservoir histories by product
- Summations by various geographic, geologic, or temporal groupings
- Normalized production profiles of recent discoveries
- Correlation of production with sizes, growth, period of discovery, and reservoir rock characteristics
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