Petrophysical Analysis

APPLICATION

Main purpose of the petrophysical interpretation is to evaluate formation petrophysical parameters: volume of shale, lithology, porosity, water saturation, using different models for calculation. Final target is to define NET-PAY zone, cost- effective for hydrocarbon production.

INPUT DATA

• OH set of raw data
• Formation water salinity
• Borehole bottom temperature

• Temperature gradient
• Core Data if available

VOLUME OF SHALE (VSH) CALCULATION

HWPetro is using all petroleum industry recognized methods (more than 25 different methods) which can be used independently or as combination for VSH modeling and calculation. Radioactive method for VSH calculation can be differently corrected: Linear, Larionov, Steiber, Clavier at. al.

POROSITY (POR) CALCULATION

Independent method for porosity calculation can be selected as well as Different Cross-plot techniques:

• Neutron/Density Cross-plot
• Neutron/Acoustic Cross-plot
• Density
• Acoustic
• Neutron
• Maximum Porosity – ALFA Factor applied

LITHOLOGY DETERMINATION

Multimineral selection can be done choosing one of the following method:

• Density/Neutron Cross-plot
• Acoustic/Neutron Cross-plot
• Photoelectric effect

WATER SATURATION (SW) INTERPRETATION METHODS

Archie
Fertl
Shell Hard Rock
Simandoux
Indonesia
Borai
Waxman-Smits

PERMEABILITY (PERM)

• Timur
• Morris und Biggs
• Por-K Regression

COAL PROCESSING

GROSS/NET/PAY CALCULATION

Cut offs for VSH, POR and SW must be selected

OUTPUT DATA

• VSH, Lithology, POR, PORW, SW
• Statistical reporting (GROSS, NET, NET-PAY Evaluation)

SOFTWARE REQUIRED

• HWPetro

EXAMPLE LOGS

APPLICATION
The main purpose of PNN logging in wells is to determine quantitative or qualitative reservoir saturation behind casing in measured intervals. Qualitative and Quantitative Saturation interpretation uses standard water saturation calculation techniques implied as well as techniques and models specially developed by Hotwell experts.

INPUT DATA

• PNN (or any other PN) Processed Data (SIGMA, RATPOR, GRPNN)
• Petrophysical Interpretation (either from OH Logs or from PNN)

INTERPRETATION METHODS

• Standard
• Graphical Enhanced
• Hingle
• Graphical Simple
• Water Saturation Matrix

OUTPUT DATA

• Saturation evaluation curves (SWPNN, PORWPNN…)
• Statistical reporting (GROSS, NET, NET-PAY Evaluation)

SOFTWARE REQUIRED

• HWProcNET
• HWQuantNET
• FF Copy

APPLICATION

PNNQI interpretation technique as well as algorithm and program PNNQI is developed in order to enable us full petrophysical interpretation based only on PNN data.

INPUT DATA

• PNN measurement

INTERPRETATION METHODS

The program is based on several interpretation techniques which are through program interconnected dependently or independently and serve to make interpretation of volume of shale (using dual-shale model), interpretation of lithology using dual mineral model as well as using these and PNN ratio porosity (compensated neutron-porosity) for effective porosity interpretation and finally interpretation of saturation based on the capture-cross section.

OUTPUT DATA

• Petrophysical interpretation (Lithology, effective porosity)
• cased hole saturation interpretation

SOFTWARE REQUIRED

• PNNQI
• PNNProcNET

APPLICATION

PNNQI interpretation technique as well as algorithm and program PNNQI is developed in order to enable us full petrophysical interpretation based only on PNN data.

INPUT DATA

• PNN measurement

INTERPRETATION METHODS

The program is based on several interpretation techniques which are through program interconnected dependently or independently and serve to make interpretation of volume of shale (using dual-shale model), interpretation of lithology using dual mineral model as well as using these and PNN ratio porosity (compensated neutron-porosity) for effective porosity interpretation and finally interpretation of saturation based on the capture-cross section.

OUTPUT DATA

• Petrophysical interpretation (Lithology, effective porosity)
• cased hole saturation interpretation

SOFTWARE REQUIRED

• PNNQI
• PNNProcNET

APPLICATION

General purpose of production logging is to evaluate the behavior, type of fluids and production or injection profiles within the wellbore during either production or injection operations. In OH this interpretation can include locating loss of circulation zones and underground breakthroughs. In CH can include locating top of cement, evaluating gravel pack quality, location of perforations, effectiveness of well treatments and others.

INPUT DATA

• Any PL tool logs (Pressures, Capacitance, Fluid Density, Temperature, Spinners…)

• Well schematics
• PVT parameters

INTERPRETATION METHODS

• Single phase
• Multiphase

OUTPUT DATA

• Phase Holdups
• Production\Injection Flow rates
• Phase velocities
• Statistical reporting

SOFTWARE REQUIRED

• HWFlowNET