INTEGRATED GEOPHYSICAL INTERPRETATION METHODS FOR HYDROCARBON EXPLORATION

Transcription

1 INTEGRATED GEOPHYSICAL INTERPRETATION METHODS FOR HYDROCARBON EXPLORATION Instructor : Kumar Ramachandran 31 July 4 August 2017 Jakarta COURSE OUTLINE The course is aimed at imparting working knowledge of integrated geophysical data interpretation for geologists and geophysicists. At the outset, the course introduces briefly petroleum geology and traps followed by an introduction of integrated exploration methods. Gravity data acquisition, processing and interpretation of gravity anomalies for subsurface structure will be covered with practical exercises on the first day of the course. Magnetic data acquisition, processing and interpretation of magnetic anomalies for mapping basement structure will be covered with practical exercises on the second day of the course. Well logging will be introduced on the third day with practical interpretational exercises for interpretation of porous and permeable zones, water saturation calculation and basic lithology identification. Seismic wave propagation, field data acquisition, and processing in land and marine environments will be discussed on the fourth day along with seismic velocities (Vp, Vs), Seismic resolution, response from thin beds, tuning and seismic amplitudes. The subsequent section on seismic interpretation is focused on introducing the method of translating the observed seismic sections to geological information critical to hydrocarbon exploration. Structural and stratigraphic interpretation, well ties, contouring and preparation of timestructure maps and isopach maps will be discussed on. Paper seismic sections will be interpreted during exercises. Various contouring algorithms will be discussed and their suitability evaluated on the final day. Quantitative information extraction from prestack and poststack seismic inversions will be discussed in the next unit. Application of seismic attribute analysis for structure/stratigraphic mapping, and reservoir characterization will be discussed in the next unit along with spectral decomposition methods for thin bed mapping.

2 The course will be summarized by discussing interpretation pitfalls and how to use integrated data interpretation approach to overcome some of the pitfalls. Focus on Gravity, Magnetic, Well Log and Seismic Data Interpretation for Hydrocarbon exploration. 1. Gravity Data Interpretation Qualitative, Quantitative, Modeling/Inversion 2. Magnetic Data Interpretation - Qualitative, quantitative, Modeling/Inversion 3. Well Log Interpretation - Caliper, Gamma & Spectral Gamma, Electrical, Sonic, Density, Neutron Interpretation for Porosity, and Lithology 4. Seismic Data Interpretation - Mapping Structure, Stratigraphy, Contouring 5. Quantitative Seismic Data interpretation 6. Integrated Geophysical data interpretation for hydrocarbon exploration 7. Case histories Day 1 Introduction to Hydrocarbon Exploration Petroleum Geology Source, Migration, Traps Gravity Method in Hydrocarbon Exploration Gravity Data Acquisition Gravity Reduction Tutorial Exercise Gravity Anomaly Regional/Residual Tutorial Exercise Regional data interpretation Tutorial Exercise Residual Data interpretation Tutorial Exercise Frequency Filtering Qualitative Interpretation Tutorial Exercise Quantitative Interpretation Depth Determination Tutorial Exercise Gravity Data Modeling/Inversion Day 2 Magnetic Method in Hydrocarbon Exploration Magnetic Data Acquisition Magnetic Reduction Magnetic Anomaly Regional/Residual Tutorial Exercise

3 Regional data interpretation Tutorial Exercise Residual Data interpretation Tutorial Exercise Frequency Filtering Tutorial Exercise Qualitative Interpretation Tutorial Exercise Quantitative Interpretation Depth determination Tutorial Exercise Gravity/Magnetic Data Modeling/Inversion Day 3 Well Logging for Hydrocarbon Exploration Caliper, Temperature Logs Interpretation Exercise Gamma Ray and SP Logs Interpretation Exercise Resistivity and Conductivity Logs - Interpretation Exercise Sonic Log, Density Log, Neutron Log - Interpretation Exercise Water saturation Computation - Interpretation Exercise Porosity Prediction - Interpretation Exercise Lithology Prediction - Interpretation Exercise Well Velocity - Check shot Survey Synthetic Seismogram - Exercise Well Tie Exercise Day 4 Seismic Theory Basics Required for Structural Interpretation of Seismic Data o Reflection, Refraction, Diffraction, Multiples o Compressional, Shear wave Velocities o Attenuation, Partitioning of Energy, Zoeppritz Equations, and AVO [Computer Exercise] o Normal and Reverse Polarities, International Polarity conventions o Synthetic Seismogram [Computer Exercise] Seismic Data Acquisition Structural Mapping Requirements o Horizontal and Vertical Resolution [Paper Based Exercise] o Seismic Field methods - Land & Marine Seismic Reflection Data Processing required for Accurate Structure Mapping 3D Seismic Data Interpretation o Aliasing: Time Aliasing and Spatial Aliasing

4 o Picking Reflections, Mapping reflection horizons [Paper Based Exercise] o Integrating Well data into interpretation Well tie o Seismic Expression of Structural Features [Paper Based Exercise] o Seismic Expression of Stratigraphic Traps o Seismic Velocities: Average, Interval, NMO, RMS, Dix Equation, Depth Conversion Techniques [Computer Exercise] o Interpretation Exercises [Paper Based Exercise] Pick and Contour anticline Pick and Correlate faults Day 5 Contouring Contouring and Mapping Principles and Method Contouring Algorithms Grid contouring, computer contouring, isopach map Contouring Pitfalls Contour anticlinal and fault data from basemap and select locations for drilling [Paper Based Exercise] Seismic Attributes Dip Seismic Computed Attribute Azimuth Seismic Computed Attribute Curvature Seismic Computed Attribute Coherence - Seismic Computed Attribute Spectral Decomposition Quantitative Geophysical Interpretation Amplitude Variation With Offset (AVO) AVO Cross Plotting / Modeling / Inversion Seismic Inversion Basics of Geophysical Inversion Sparse Spike Inversion Elastic Impedance Inversion Pitfalls in Seismic Interpretation Course Summary

5 ABOUT THE INSTRUCTOR Kumar Ramachandran is an Associate Professor of Geophysics at the University of Tulsa. He worked with Oil and Natural Gas Corporation (ONGC), India for seventeen years before moving to academics in During his career with ONGC he worked with seismic, gravity and magnetic data acquisition, processing and interpretation aspects of hydrocarbon exploration in sedimentary basins in North India. Later he worked with Geological Survey of Canada and Queens University, Canada before joining University of Tulsa. He has a Master of Science Technology (Applied Geophysics) and Master of Technology (Petroleum Exploration) degrees from Indian School of Mines, Dhanbad, India, and a PhD in Geophysics from University of Victoria, Canada. His research and teaching interests are in detailing subsurface physical properties using geophysical methods for identification of hydrocarbon, water, mineral and coal resources. His current work in petroleum related research is focused on imaging reservoir properties through quantitative geophysics and artificial intelligence methods. He teaches industry courses at U.S.A., Mexico, Venezuela, Algeria, Turkey and India. ENROLLMENT In order to allow sufficient time for arranging travel plans, early enrollment is recommended. Registration will be closed on 23 June Late enrollment may result in course cancellation. CANCELLATION, SUBSTITUTION & REFUND The tuition fee will be refunded (less US$ 100 registration fee) only if notification of cancellation is received at least 10 days prior to the commencement. Non payment of tuition fee does not constitute automatic cancellation of participation. Substitution may be made at any time for those enrolled. CERTIFICATE A certificate of participation will be awarded to each person completing the course. TUITION FEE Tuition fee at Rp. 37,000,000 + VAT per delegate (the tuition fee will be adjusted based on the prevailing rate) is due and payable upon confirmation of enrollment. The fee is excluded accommodation. Payment should be settled at the latest on 23 June Any bank charges connected with payment in Rupiah must be added to tuition fee payment. Tuition fee includes admittance to the course, course materials, daily refreshments and full lunch. Payment can be made to PT.GEOSERVICES Bank Mandiri KC Jakarta Kebon Sirih Jl. Tanah Abang Timur No. 1 2, Jakarta Account No: (IDR)