Details of my Shell career
- I joined the Geophysics Department at KSEPL (Koninklijke/Shell Exploration
and Production Laboratory) in Rijswijk in The Netherlands on 15-9-69. I stayed
there till 31-8-76. During that period I did geophysical research in the
fields of reflection signal detection, static corrections, velocity
determination and time-to-depth conversion in the presence of structure. The
latter subject was also the title of my paper at the annual SEG Conference in
1974 and in Geophysics (June 1977).
In addition to doing research I have
lectured and prepared course material for internal courses that were given to
new as well as experienced geophysicists and seismologists on the following
- communication theory-signal theory:
- fundamentals of digital filter theory
- stochastic signal theory
- linear systems and linear least-squares filter design
- advanced seismology:
- the theory that underlies the processes that are applied in seismic
data processing with Shell's proprietary software package.
- From 1-9-76 till 30-6-77 I worked in the geophysical department at SIPM in
The Hague (Head Office) in order to do seismic processing and special studies
in cooperation with interpreters.
- On 1-7-77 I went for three years with my family to Brunei in order to join
the geophysical departement of Brunei Shell Petroleum Co. The job consisted
familiarized myself with data acquisition, both land and marine.
- seismic processing and special studies as the geophysicist in the
- supervision of in-house contractor processing
- liase with the processing contractors in Singapore
- provide training on the job to local colleagues.
- For the period 1-7-80 till 30-6-85 I returned to KSEPL in the geophysical
department. During that period I was section head of "Structural
Determination" and responsible for:
- the development of 3D technology, including a.o. normal moveout
analysis, stacking, raytracing and modelling and migration
- the development of a strategy for velocity model building and updating
in conjunction with migration.
- I was exchange scientist from 1-7-85 till 30-6-86 in Houston at BRC
(Bellaire Research Center) which is the Exploration and Production Laboratory
of Shell Development Company. There I did research on AVO (Amplitude Versus
Offset) and on inversion.
- From 1-7-86 till 30-6-91 I was section head of the section "Elastic
Methods" at KSEPL and responsible for the research on:
In our section we a.o. processed
the multi-component ARCO Group Shoot data set and were actively involved with
the (first) 3D multi-component (three source and three receiver orientations)
survey on behalf of a Shell Operating Company (3D-9C Natih for PDO in Oman).
This included survey design, the development of processing strategies and
tools and the building of a modelling package for testing and interpretation
of the results.
- multi-component seismic
- tomography and VSP processing
During this period I lectured regularly on AVO, shear
technology and multi-component data processing.
- From 1-7-91 till 31-12-93 I was transferred to Calgary where I worked as
senior staff geophysicist with Shell Canada Limited; my assignments were:
- special processing and dedicated software development for imaging in the
presence of rough topography and thrust tectonics
- processing for seismic-to-VSP-to-well matching for stratigraphic plays
- From 1-1-91 till 15-6-99 I worked at KSEPL (now SIEP-RTS) as principal
research physicist in "Seismic Imaging". I have participated in research to
develop methods for velocity model building and updating for 3D data with
general acquisition geometries. I was a member of a team that aims to further
these methods by using new (multi-component) acquisition geometries, different
types of body waves, gravity and magnetic observations and integration with
interpretation technology. These developments are accelerated by taking on
case studies for operating companies.
I also lectured and prepared the
course material for in-house advanced courses on:
- migration principles and algorithms
- velocity model building and updating methods
- dip moveout (dmo)
Overview of contacts with universities and geophysical institutes
- I was KSEPL's liaison with Prof. Claerbout's SEP (Stanford Exploration
Project) from 82-85.
- I was KSEPL's liaison with Prof. Berkhout's DELPHI Consortium (Delft
University of Technology) from 88-91.
- I was a member of the Local Organizing Committee -chaired by
Prof.Berkhout- that was in charge of the organization of the 50th meeting and
technical exhibition of the EAGE in 1988 in The Hague. Together with Prof.
Ziolkowski of TUD and ir. Ridder of TNO (Dutch Institute of Applied Physics).
I was responsible for the Technical Programme.
- I act as referee for abstracts of papers submitted for presentation at
EAGE Conferences and occasionally as a session chairman at these conferences.
- In 1990 two colleagues and I went to Russia for three weeks on behalf of
KSEPL to visit Prof. Chesnokov of the Russian Academy of Sciences and his
institute in Moscow -they do research on anisotropy- and to visit
representatives of the Ministry of Geology. The latter group also invited us
to visit their offices in Krasnoyarsk and Igarka.
- While I was in Calgary I was a member of the CSEG (Canadian Society of
Exploration Geophysicists) and I attended the sponsor meetings of Prof.
Stewart's consortium called CREWES (Consortium for Research in Elastic Wave
Exploration Seismology) of which Shell Canada was a sponsor. I have also
attended the Fifth Internatiol Workshop on Seismic Anisotropy that was held in
Banff, Alberta; May 17-22; 92.
- Since mid 94 I was KSEPL's liaison with IFP (Institut Francais du Petrole)
consortium PSI (Prestack Structural Interpretation) and its successor KIM
(Kinematic Inversion Methods); these consortia are directed by Dr. Ehinger and
Dr. Lailly of IFP.
- Since 1-1-98 I was KSEPL's liaison in a project that is sponsored by the
EEC under Thermie (=non-nuclear energy). This project aimes at the imaging of
complicated salt structures that in particular occur in the North Sea. The
project members are IFP, CGG, Amoco UK, Norsk Hydro and Shell.
- Since 1-1-96 I was (again) KSEPL's liaison with Prof. Berkhout's DELPHI
- Via my colleagues at KSEPL who are liaison with other universities I am
familiar with the work that is being done at:
- the Colorado School of Mines by Prof. Bleistein and his group
- the University of Prague by Prof. Cerveny and his group.
- In cooperation with the Delft University of Technology and the
Rijksuniversiteit of Utrecht. I have supervised the practical work of their
engineer/doctorate students as well as their Ph.D. students. I have also
participated as a member of Ph.D. committees.
- I was associate editor of "Geophysical Prospecting" (a monthly published
by the EAGE) for Migration, Modelling and Imaging.