Gaswell Testing

1. Conventional & Isochronal Tests.- 1.1 Derivation of Fundamental Flow Equation.- 1.2 Conventional Test.- 1.3 Isochronal Test.- 1.4 Modified Isochronal Test.- 2. Additional Testing Options.- 2.1 Pseudopressure (Real Gas Potential) Treatment for Gas Flow.- 2.2 The Radial Diffusivity Equation for Gas Flow.- 2.3 Analytical Solution of the Diffusivity Equation.- 2.4 Flow Regimes.- 2.5 Skin Factor.- 2.6 Turbulent Flow Factor.- 2.7 Drawdown or Falloff Test.- 2.8 Buildup Test.- 2.9 Determination of S, S? and D from Buildup and Drawdown Tests.- 3. Additional Testing Considerations.- 3.1 Surface-Pressure Relationships.- 3.2 Stabilization Time and Radius of Investigation.- 3.3 Choice of Flow Rates and Duration of Flow Rates.- 3.4 Wellbore Storage Effects.- 3.5 Production of Liquids.- 3.6 Single-Point Test.- 3.7 The Orifice Meter.- 3.8 Testing Equipment.- 3.9 Measurement, Sampling, and Safety in Testing.- 4. Procedures & Regulations.- 4.1 Interstate Oil Compact Commission Procedures.- 4.2 State of Texas Regulations.- 4.3 State of Oklahoma Regulations.- 4.4 State of New Mexico Regulations.- 4.5 State of Louisiana Regulations.- 4.6 Province of Alberta Regulations.- 5. Field Test & Interpretation.- 6. Exercises.- Nomenclature & Units.- Appendix A.- Derivation of the Continuity Equation.- Appendix B.- Analytical Solution of the Diffusivity Equation.- Appendix C.- Skin Due to Restricted Entry.- Appendix D.- Determination of Gas Supercompressibility Factor and Viscosity.- Appendix E.- Orifice Coefficients.- Appendix F.- Sample Data Reporting Forms.