Discusses the modern (indirect) methods of deconvolution and how they can help to avoid the sensitivity to data quality.
• The deconvolution process with live demonstrations.
• When deconvolution works and when it fails.
• Comparison of deconvolution and modeling to determine reservoir characteristics.

Introduces the fundamental concepts behind deconvolution as an inverse process and how it helps us in well testing.
• Typecurve (unit rate function) to describe the reservoir.
• Concept of superposition (convolution) as a direct process.
• Deconvolution as an inverse process—its strengths and limitations.

Reviews the applications of reservoir engineering techniques for coalbed methane reservoirs.
• Volumetric, Material Balance, Deliverability Forecast, and Production/Pressure History Matching methods.
• Advanced topics of Binary Langmuir isotherm and Risk Analysis using Monte Carlo simulation.

Explains fundamental concepts in the field of coalbed methane and CBM's potential in North America.
• Coal structure (matrix and cleats) and how gas is stored in the coal (adsorbed and free).
• Adsorption isotherm and how gas is transported in coal fractures via desorption, diffusion and Darcy flow.
• Concepts of relative permeability and matrix shrinkage and how they affect the effective permeability & absolute permeability.

Explains how testing tight gas requires a short duration test, and focuses on Perforation Inflow Test Analysis.
• Practical applications of PITA including pre-frac evaluation and commingling.
• Design considerations of PITA including the supercharge effect.

Reviews worldwide resource potential of gas hydrates & active field projects.
• Modeling studies of hydrate reservoir production from underlying free-gas zone.
• Complex processes involved in hydrate decomposition.
• Numerical simulations & analytical studies showing significant amounts of gas at commercially high rates can be produced from solid gas-hydrates.

Shows how acid gas injection wells behave in ways which are not always intuitive and expected.
• Acid gas can be understood by means of a compositional fluid thermodynamic property package coupled with a multiphase wellbore flow model.
• Complex pressure-flow phenomena observable in the real world is explained in terms of a combination of fluid flow and phase behavior.

Shows how reserve determination should be based on combinations of methods.
• Each method has certain advantages and limitations, combinations of the methods will reduce uncertainty in the reserve estimates.
• Combined methods increase understanding of the reservoir drive mechanism and potential for further recovery.

Discusses 5 case studies using the advanced methods of production data analysis.
• Success stories that are taken from both our own consulting studies and the independent analyses of our clients.
• Reliability of the methods is demonstrated by comparing the results with post-analysis production performance.

Discusses the 5 step modeling process used by Fekete in its gas gathering optimization projects.
• The steps are the Pipeline Pressure Loss Match, the Well Deliverability Match, the Compressor Match, the Base Case, and the Production History Match.
• These steps allow for optimization of line looping, well unloading, infill drilling, installation of booster compression, etc.

Extends the FMB's benefits from using constant flow rates to variable flow rates to calculate Gas-In-Place.
• How to convert the flowing pressure to the corresponding average reservoir pressure.
• Includes 2 case studies to illustrate the use of the FMB, and to emphasize the importance of evaluating both the flow and the shut-in data.

Shows how the FMB, which uses production rates and flowing pressures, can better evaluate total fluids-in-place.
• Technical benefits to using flowing data with shut-in data to evaluate the material balance equation.
• Includes 3 demonstrations that illustrate the simplicity with which the FMB is applied using software.

Explains how production data and well test data differ.
• Modern decline analysis vs. traditional decline analysis to provide more reliable estimates for recoverable reserves and fluids-in-place.
• Modern decline analysis is a practical and economic alternative to well testing.
• Modern decline analysis can be used with well test results to offer a much better understanding of your reservoir.

Discusses how wellbore effects can dominate over reservoir effects and lead to the wrong interpretation.
• The analyst must always keep in mind that what the pressure recorder sees may not be what the reservoir saw.
• The analyst's first task should be to differentiate between wellbore & reservoir transients to get the correct interpretation.

Importance of Fabric on the Production of Gas Shales

COPE, G., DUNN, K.