FROM THE WEBSITE
UNITED THEOLOGICAL COLLEGE
Cashbook and Claypan
Birdsville or Bust
East From Oodna
Alive in the Dead Heart
B-line for Birdsville
Oil Exploration in the Simpson
A Brief History (1963-1965)
How French Petroleum Became Involved
They had to start almost from scratch. The aeromagnetic survey had been done previously. My first task was to find the actual depth of Lake Eyre below sea level. With a surveying crew working from the North South Railway line, we showed this lowest point on the Australian continent was lower than previously thought, at some 50 ft (16 m). The second major survey was a helicopter gravity survey over more than 50,000 square miles covering all of the South Australian tenement. An Australian Company, Wongela Geophysical Pty Ltd, got the contract. Helicopters landed throughout the whole tenement on a 4 mile grid, including all of Lake Eyre, the Simpson Desert to the Northern Territory Border and huge swathes of country North of Oodnadatta. The results were sent to France for interpretation.
CGG's Heavy Plant Tackles The Dunes
Meanwhile Jean Laherrere, the Chief Geophysicist, had decided the best way to test the whole area was to conduct a reflection seismic survey from one side to the other of the Simpson Desert (or Munga Thiri as the Wangkangurru people call it). What an immense task. The exploration team sought tenders and eventually Compagnie Generale de Geophysique (CGG) was awarded the contract. They had expertise in working in the Sahara Desert that was to be useful in the Simpson with its 1100 sand dunes to be crossed running approx. North South. The mapping of the strata below the Great Artesian Basin Aquifer favoured the use of reflection seismic with its patterns of small explosions at each of its thousands of shot points, rather than the use of refraction's large explosions that are measured over greater distances. The reflection technique was a means of listening to the echoes from the lower strata that then enables these strata to be mapped.
I was one of the FPC(A) supervisors of the Seismic Survey undertaken under contract by CGG. What a great job they did under extreme conditions. No one then even guessed that this first desert wide seismic line would come to be called “The French Line” in a few decades with thousands of four wheel drive enthusiasts each year making the crossing. CGG dragged sleeping and eating semi-trailers over the sand dunes from one seismic base camp to another on a track bulldozed in a straight line from West to East. They followed the tracks of the Recording Truck. It stopped every 600 metres along that line near a shothole. There a pattern of individual explosion points had been drilled and loaded by the drillers and their trucks sent out ahead, following the tracks of the surveyors. A 1200 metre line of special geophones or microphones were laid out along the seismic line over the dunes by another crew for each shot. The explosion enabled the echoes to be recorded. The whole process continued again and again shotpoint by shotpoint. It was hot work in a desert. The results of hundreds of these listening points were sent to Adelaide for interpretation by FPC(A).
Birdsville's Tribute to the French Line Construction Crew
The exploration phase finished at the end of 1965. The exploration team of FPC(A) moved on to Perth and eventually was transferred to FPC(C) in Canada. I was given the task of writing up the final geophysical report which the company submitted to the South Australian Mines Dept.
A great enterprise. But as it turned out the favourable accumulation places for oil and gas were a few hundred kilometres further East in what came to be called the Moomba Gas fields.
I am not sure when, but with the exploration phase over in Australia for CFP, FPC(A) became an historical footnote, in the world wide exploration history of TOTAL.
For a more detailed description of the geophysical exploration see:
||Try the "with Malice a'Forecourt?" link and read what they did|
|Local Traders||35th Anniversary
||Thommo's Desert Report||The BeeGees Page|
|Coles Express Picks On a Pensioner||The Kid From Towra Point|
|Bulldozing a Desert||Trans National Causeway|
|Signwriter for the Simpson||The Long Haul|
|Simpson Desert Birdlife||French Line Circa 1979|
EMAIL THE EDITOR