In developing the Basin and Play Evaluation Service , Nehring Associates has created dozens of standardized retrievals and displays. In determining which retrievals and displays to develop, we chose those which best inform a broad range of upstream and midstream strategic decisions. The range of potential choices is summarized below:

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