The book comprises two parts: Pressure and Flow Well Testing (Part I) and Temperature Well Testing (Part II), and contains numerous authors’ developments. Due to the similarity in Darcy’s and Fourier’s laws the same differential diffusivity equation describes the transient flow of incompressible fluid in porous medium and heat conduction in solids. Therefore it is reasonable to assume that the techniques and data processing procedures of pressure well tests can be applied to temperature well tests. The book presents new methods to determine the formation of permeability and skin factors from tests conducted in simulated wells, designing interference well tests, processing constant bottom-hole pressure tests, estimation of the formation temperature and geothermal gradients from temperature surveys and logs, in-situ determination of the formation thermal conductivity and contact thermal resistance of boreholes, temperature regime of boreholes (cementing of production liners), and the recovery of thermal equilibrium in deep and superdeep wells. Processing and analysis of pressure and geothermal data are shown on numerous field examples from different regions of the world.
The book is intended for students, engineers, and researchers in the field of hydrocarbon geophysics and geology, groundwater searching and exploitation, and subsurface environment examination. It will be also useful for specialists studying pressure and temperature in parametric deep and superdeep wells.
Pressure and Flow Well Testing. Pressure and Temperature Drawdown. Well Testing: Similarities and Differences. The Adjusted Circulation Time. Variable Flow Rate Drawdown Test. Short Term Testing Method for Stimulated Wells. Determination of the Skin Factor for Well Produced at a Constant Bottom-hole pressure. Evaluation of the Efficiency of Wellbore Stimulation Operations. Designing an Interference Well Test in a Geothermal Reservoir. Interference Well Testing – Variable Fluid Flow Rate. Determination of Formation Permeability and Skin Factor from Afterflow Pressure and Sandface Flow Rate. Analyzing the Pressure Response during the Afterflow Period – Determination of the Formation Permeability and Skin Factor. Application of the Horner Method for a Well Produced at a Constant Bottomhole Pressure. Step-pressure Testing. Temperature Well Testing. Determination of formation temperature from bottom-hole temperature logs – a generalized Horner method. Three points Method for Estimation of the Formation Temperature. Two Temperature Logs Method. Comparison of three Methods. Geothermal Temperature Gradient. Estimation of the geothermal Gradients from Single Temperature Log – Field Cases. Radial Temperature Distribution. Cylindrical Probe with a Constant temperature - Determination of the Formation Thermal Conductivity and Contact Thermal Resistance. Well Temperature Testing – an Extension of the Slider’s Method. Cementing of Geothermal Wells –Radius of the Thermal Influence. Cementing of Casing in Hydrocarbon Wells: the Optimal Time Lapse to Conduct a Temperature log. Temperature Regime of Boreholes: Cementing of Production Liners. Recovery of the Thermal Equilibrium in Deep and Super Deep Wells: Utilization of Measurements While Drilling Data.