Processing Geophysicist

• Jan 2023 - Present

Consultant / Geophysicist

• Jun 2022 - Present

• Contracted to reprocess vintage 2D land seismic data along side Kenmore Geophysical. • Worked as liaison between clientele and other contracted Geophysicists. • Wrote status reports and created presentations for clients • Wrote Final reprocessing report • Uploaded Final deliverable SEG-Y • developed and implemented post-stack time and depth migration filters that applied dynamic frequency and wave number scaling as well localised common reflection move out to broaden spectrum, enhance signal, and reduce ambient and coherent noise. • Extracted and interpolated physical coordinates for all lines as using Google Earth, Australian Datum Tool, and Excel. • Implemented a least-squares Marchenko multiple elimination algorithm to remove interbed multiples from data. • implemented and Applied partial CRS stacking, and trace interpolation to enhance signal, reduce noise, and fill in missing traces. • Applied basic interpretation and QC of seismic sections in presentations to clients. • discussed presence of potential AVO anomalies in data with other contractors and client. • Assisted in development of joint-bid for project with Kenmore Geophysical. • Organised meetings between myself, other contractors and potential client to discuss possibilities for future projects. • Contracted out to work on line crew for surface wave data acquisition for MASW based shear wave velocity profile estimation. • Contracted out to acquire resistivity and EM data for environmental and geotechnical purposes. Show less

Research And Development Geophysicist

• Mar 2018 - Jun 2022

• Development of algorithms for the processing of seismo-electric data. • Literature review of available seismo-electric technical papers, Academic papers, dissertations, and white papers to ascertain recommendations for seismo-electric acquisition and processing strategies. • Development of GUI and back-end to process a large swaths of seismo-electric data. • Implementation of Marchenko redatuming and imaging via python. • Optimisation of Marchenko algorithms for large scale seismic datasets via batching and cuda based functions leveraged via cupy. • Literature reviews, and programmatic implementation of various seismic processing algorithms to process seismic data when in-house available software processing solutions were inadequate or non-existent. algorithms developed in-house include; SRME, deconvolution, CRS stacking, Time -Frequency denoising, Adaptive noise removal via stationary and non-stationary match filtering. • Preparation and presentation of research and development, and processing results on a regular basis to upper management, colleagues, and clientele. • Algorithm optimisation and bench-marking utilising python packages such as numba and cupy. Cython was also utilised in some situations for a seamless optimisation solution that interacts with python post-compilation. • Utilised the python packages, dask and zarr for bespoke out-of-memory processing as a way to mitigate memory scaling inadequacies. • Utilised the processing algorithms I developed in tandem with various python packages, and seismic processing software Madagascar, and Seismic Unix to develop workflows for the processing of 2D land and marine datasets. • Translation of various MATLAB and C codes into python. Show less

Geophysicist

• Dec 2011 - Nov 2017

• Obtained short-wave, long-wave refraction statics and a near-surface velocity model via first break picks and stratified ray-tracing and curved-wave tomography • Assisted in multi-pass velocity analysis and QC on 2D, 3D, land and marine projects. • Developed bespoke in-house desktop applications using python and Qt to apply azimuthal velocity analysis to realise velocity changes due to azimuthal anisotropy • developed in-house web-based software tools for LAS file analysis, sonic log calibration, and synthetic seismogram creation using python for backend development and the JavaScript framework qooxdoo for frontend development • Developed in-house web-based software tools for 3D seismic survey design using python for back-end development and the JavaScript framework Qooxdoo for front end development. • Assisted in and created Claritas jobs and workflows for seismic processing of Lines (2D) and inlines and crosslines (3D), Land and Marine projects. • Developed bespoke in-house desktop application using Python and Qt to monitor and manage batch files for scaled-up seismic 5D interpolation running on multiple nodes on in-house server. • Developed bespoke in-house desktop application using Python and Qt for interactive azimuthal and non-hyperbolic velocity analysis • Water bottom, horizon, and mute picking on various seismic projects • Digitisation and set up of navigation and observer log data for conversion into Claritas and in house geometry databases configured for use with claritas software • Scripting of python scripts for on-the fly processing, data analysis, data conversion and data management • QC of geometry shots to ensure created geometry databases from digitised observer logs, and navigation data pair well with raw shot data. • Preparation of presentations showing processing workflow and subsequent seismic stacks and images to visualise the improvements of workflow • Archiving of tape and disk data, backing up of legacy project data Show less