Luncheon Talk HAGI “Waveform Tomography”

Waveform Tomography (Wavetomo) is a new class of tomography using full-waveform inversion technique.

Waveform Tomography, with novel inversion algorithm and the advent of computer processing power, give higher resolution velocity profile than Traveltime Tomography, the current standard method. High resolution result can detect low velocity zones and high attenuation zones easily, make it possible as direct prospecting tool.

The main benefits are :

• Easier. Wavetomo is direct prospecting solution, give you easier interpretation using colorful images.
• Better. Wavetomo exploits all waveform data, give you more comprehensive and objective information.
• Faster. Wavetomo, using sophisticated algorithm and powerful parallel processing, gives result in few hours. Let you make decision quickly.

From crustal to cross-hole, refraction to reflection, 2D-3D-4D, migration velocity to direct prospecting, wavetomo wide applications give you :

• More opportunities
• Less risks
• Time Saving

Waviv WaveTomo uses a novel iterative Helmholtz solver, invented by Yogi A. Erlangga. Erlangga is distinguished member and technical advisor of Waviv Technologies.

Compliment

Funded by Shell and SenterNovem, Erlangga’s research is pure mathematics. It all centres on the so-called Helmholtz equation. Solving this is important in interpreting the acoustic measurements taken when prospecting for oil. Sound waves are transmitted into the ground and their reflections recorded as they return to the earth’s surface. Analysis of this data enables specialists to locate oil deposits.Solving the Helmholtz equation requires huge arithmetical capacity. As part of his PhD research, Erlangga has succeeded in making the method of calculation used to solve the Helmholtz equation a hundred times faster. And that finally makes it possible for firms like Shell to use 3D calculations when prospecting for oil. So it seems highly likely that oil companies will express an interest in exploiting Erlangga’s work.

“Given the responses we have had from industry and foreign universities, we believe that a thirty-year-old problem has been solved in this work.” says Dr Kees Vuik

Erlangga’s PhD supervisor Delft University of Technology. Press Release, Dec 2005