Lohayani V R
Chennai
Summary
Dedicated trainee petrophysicist with hands-on exposure to wellsite wireline operations and real-time drilling monitoring. Skilled in assisting with LWD, MWD, wireline logging, and RCI operations to support accurate data acquisition and interpretation. With growing experience in formation evaluation and committed to collaborating with senior paraphysicists to deliver reliable subsurface insights.
Overview
1
1
year of professional experience
1
1
Certification
Work History
Trainee Petrophysicist
Hindustan Oil Exploration Company
Chennai, India
08.2025 - Current
- Worked on open-hole log interpretation (GR, resistivity, density, neutron, sonic, PEF) for carbonate and clastic reservoirs across Cambay, Assam–Arakan, KG and Mumbai Offshore basins
- Handled log data preparation for interpretation, including cleaning, depth matching, splicing and merging multi-run LWD and wireline logs using Geolog
- Estimated shale volume, porosity and water saturation using standard methods (Archie, Simandoux, Indonesian, Juhasz)
- Calculated permeability (Wyllie–Rose) and supported net reservoir / net pay evaluation through cut-off analysis
- Monitored real-time drilling parameters (ROP, gas, RPM, SPM, SPP, hook load) during field operations on 3 wells (2 Cambay basin, 1 Assam–Arakan basin)
- Described lithology from drill cuttings and checked for hydrocarbon shows using UV fluorescence and basic chemical tests
- Was present during LWD, MWD, wireline logging, NMR, CBL-VDL and RCI operations, observing tool runs, calibration checks and general wellsite workflow
- Helped with basic log correlation (GR, resistivity) and supported seniors in identifying formation tops and pressure points
- Noted operational details like tight holes, repeat passes, logging speed and downtime, and shared updates with the team
- Assisted in formation pressure testing and sample depth selection with guidance from senior petrophysicists
- Managed and organized data from LWD, MWD, wireline and mud logging, and shared required datasets with internal teams and partners
Education
Master of Science - Geology
University of Madras
Chennai, India01-2025
Bachelor of Science - Geology
Presidency College
Chennai, India01-2023
Skills
- Wellsite Operations
- Wellsite Safety (HSE)
- LWD / MWD
- Wireline Logging
- Reservoir Formation Testing
- Drill Cuttings Analysis
- Logging Tool Physics
- Petrophysical Analysis
- Porosity
- Water Saturation (Sw)
- Permeability
- Vshale Estimation
- Subsurface Data Analysis
- Sequence Stratigraphy
- Geolog
Internship
Oil and Natural Gas Corporation Ltd. (ONGC), Karaikal, Puducherry
Jan 2024 – Feb 2024
- Gained understanding of Cauvery Basin geology, including rift tectonics, stratigraphy, and hydrocarbon prospectivity
- Developed knowledge of sequence stratigraphy concepts such as transgression, regression, and stacking patterns
- Acquired foundational knowledge in mud logging operations, drilling fluids (WBM/OBM), wireline logging tools (GR, Density-Neutron, Caliper, SP, Resistivity), and well control fundamentals (BOP)
Certification
- Basics of Well Log Interpretation using Geolog Software – Geoscience Skills
- Cement Bond Log (CBL) Evaluation – iSlay
- IWCF Level 1 Well Control Certification – International Well Control Forum (IWCF)
- Geophysical Exploration Methods – NPTEL, IIT Madras
Timeline
Trainee Petrophysicist
Hindustan Oil Exploration Company
08.2025 - Current
Master of Science - Geology
University of Madras
Bachelor of Science - Geology
Presidency College