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Jan Douma5663 Grand Floral Blvd, Houston, TX 77041

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Jan Douma Phones & Addresses

5663 Grand Floral Blvd, Houston, TX 77041

Davenport, FL

New Orleans, LA

3414 Shadowside Ct, Houston, TX 77082 (713) 206-2879

Emails

j***[email protected]

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Jan Douma resumes & CV records

Resumes

Jan Douma Photo 24

Jan Douma

Location:
Houston, TX
Industry:
Oil & Energy
Work:
Universiteit Utrecht Jun 1985 - Aug 1989
Research Assistant at Department of Exploration Geophysics Shell Jun 1985 - Aug 1989
Retired
Education:
Utrecht University 1985 - 1988
Doctorates, Doctor of Philosophy
Skills:
Seismic Imaging, Geophysics, Leadership, Project Management, Customer Engagement, Solid Presentation Skills, Interpersonal Skill, Communication Skills
Jan Douma Photo 25

Jan Douma

Publications & IP owners

Us Patents

Seismic Receiver Motion Compensation

US Patent:
6480440, Nov 12, 2002
Filed:
Mar 7, 2001
Appl. No.:
09/801377
Inventors:
Jan Douma - Houston TX
William H. Dragoset - Houston TX
Assignee:
Westerngeco, L.L.C. - Houston TX
International Classification:
G01V 138
US Classification:
367 21, 702 6
Abstract:
A method of compensating for seismic receiver motion in a marine seismic survey wherein at least one receiver is towed behind a moving seismic vessel comprises producing an acoustic energy wave at a seismic source, and recording the reflection arrival time t of the acoustic energy wave at the one receiver. The offset x between the source and the one receiver is determined. The normal moveout velocity V for the acoustic energy, and the velocity V of the seismic vessel are also estimated. A corrected reflection arrival time t , of the acoustic energy wave is then determined by applying a time correction to the recorded reflection arrival time t. The time correction is a function of the offset x, the normal moveout velocity V, and the velocity V of the seismic vessel. The method is applicable to a plurality of receivers, whether the receivers are arranged in a single sensor acquisition system or hardwired to form receiver groups.

Timed Shooting With A Dynamic Delay

US Patent:
6483774, Nov 19, 2002
Filed:
Mar 13, 2001
Appl. No.:
09/805092
Inventors:
Jan Douma - Houston TX
Assignee:
Westerngeco, L.L.C. - Houston TX
International Classification:
G01V 138
US Classification:
367 16, 181107
Abstract:
The present invention, in certain embodiments, discloses a method for acquiring marine seismic data using a seismic acquisition system where shot points are determined and shot records recorded. A time at which the source vessel will be substantially at a shot point position is predicted and the seismic source is activated at the shot point. The shot is recorded and the next location for recording a shot is determined. If the source vessel has passed the determined next shot point position, the seismic source is activated and a shot is recorded. If the source vessel has not reached the next shot point, a time delay is implemented until the shot point is reached. The method allows for efficient acquisition of seismic data under varying field conditions by resembling a distance based shot point determination method unless a time based acquisition method becomes more appropriate due to field conditions or other operational considerations.

Possible Relatives

Deborah K Douma  Harry Douma  Jeffrey S Douma  Mark P Douma  Nick A Douma  Barbara J Douma  Jan L Last  Jan L Johnson  Jan L Jones  Jan L Stanley 

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