## Reservoir Petrophysics

*enables you to establish systematic theoretical and laboratory study of physical properties of petroleum reservoir rocks; lithology, porosity, elastic properties, strength, acoustic properties, electrical properties, relative and effective permeability, fluid saturations, capillary characteristics, and rock-fluid interaction.*

**NoDoC***cost models involve the following:*

**NoDoC**• Is data usable?

• Are logs consistent?

• Conventional analysis vs. model?

• Net pay?

• Engineering needs?

• What does seismic tell us?

• Log normalization

• Petrophysical analysis

• Net pay identification

• Facies-units or flow-units

• BVW, contacts, Phi-K

• Rock physics/petrophysics relations

In addition, with

*Models, you will be able to Estimate the Cost of the following activities in a real project(s):*

**NoDoC**• Defining elastic properties and rock strength and factors affecting them.

• Define porosity, discuss the factors which effect porosity, and describe the methods of determining values of porosity.

• Define the coefficient of isothermal compressibility of reservoir rock and describe methods for determining values of formation compressibility.

• Define acoustic properties of rock and factors affecting them.

• Define permeability and its determinants.

• Reproduce the Darcy equation in differential form, explain its meaning, integrate the equation for typical reservoir systems, discuss and calculate the effect of fractures and channels, and describe methods for determining values of absolute permeability.

• Explain boundary tension and wet ability and their effect on capillary pressure, describe methods of determining values of capillary pressure, and convert laboratory capillary pressure values to reservoir conditions.

• Method of determining fluid saturations in reservoir rock and show relationship between fluid saturation and capillary pressure.

• Define electrical properties of rock and factors affecting them. Define resistivity, electrical formation resistivity factor, resistivity index, saturation exponent, and cementation factor and show their relationship and uses; discuss laboratory measurement of electrical properties of reservoir rocks; and demonstrate the calculations necessary in analysing laboratory measurements.

• Define effective permeability, relative permeability, permeability ratio; reproduce typical relative permeability curves and show effect of saturation history on relative permeability; illustrate the measurement of relative permeability; and demonstrate some uses of relative permeability data.

• Demonstrate capability to perform calculations relating to all the concepts described above.

In addition, with

*, Robust reserves and simulation are achieved by the logical, systematic integration of all relevant data. A quality interpretation is extremely cost-effective compared with data acquisition or development mistakes and essential with today’s complex reservoirs and data sets. Integration will often replace the need to run expensive, irrelevant logs, explain apparent data conflicts and provide the correct answer faster, strengthening your position as an operator. By contrast, stand-alone log analysis often results in wrong decisions and weakens your technical position in the eyes of your partners. This course, which evolved over 20 years of petrophysical consulting and lectures, demonstrates how robust answers are achieved by the logical integration of diverse data. Basic economics are addressed first by Quick-Look-Log-Analysis and then by a disciplined, logical process to optimize the interpretation of porosity, saturation, permeability and fluid contacts - the basis of Reserves. Low-Contrast-Low-Resistivity pay, clastics and carbonates are evaluated by straight forward integration techniques which out-perform log analysis with direct, plain to see results. LWD, wireline, NMR, image logs, routine, special core and MDTs are pieced together to clarify SW and permeability, improve reservoir simulation and typically increase booked reserves. The basic “rock physics” work flow to project results into geo‑models, is then reviewed.*

**NoDoC**