--> Abstract: The Land-Streamer Acquisition System to Map the Sand Dune Base, by Hashim Almalki, Tariq Alkhalifa, Ramzy M. AlZayer, and Abdulrhman Alanezi; #90105 (2010)
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AAPG GEO 2010 Middle East
Geoscience Conference & Exhibition
Innovative Geoscience Solutions – Meeting Hydrocarbon Demand in Changing Times
March 7-10, 2010 – Manama, Bahrain

The Previous HitLandNext Hit-Streamer Previous HitAcquisitionNext Hit System to Map the Sand Dune Base

Hashim Almalki1; Tariq Alkhalifa2; Ramzy M. AlZayer3; Abdulrhman Alanezi4

(1) SAC, KACST, Riyadh, Saudi Arabia.

(2) KACST, Riyadh, Saudi Arabia.

(3) Saudi Aramco, Dahran, Saudi Arabia.

(4) SAC, KACST, Riyadh, Saudi Arabia.

Complex near-surface structure is a major problem in Previous HitlandNext Hit Previous HitseismicNext Hit Previous HitdataNext Hit. This is more critical when Previous HitacquisitionNext Hit takes place over Sand dune surfaces, where the base of the Sand acts like a trap for energy and depending on its shape can considerably distort conventionally acquired Previous HitseismicNext Hit Previous HitdataNext Hit. Estimating the base of the Sand Dune surface can help model the Sand dune and reduce its harmful influence on conventional Previous HitseismicNext Hit Previous HitdataNext Hit. Among the current methods to do so is drilling upholes and using conventional Previous HitseismicNext Hit Previous HitdataNext Hit to apply static correction. Both methods have their cost and limitations. For upholes, the cost factor and its inability of upholes to provide continuous model is well realized. Meanwhile, conventional Previous HitseismicNext Hit Previous HitdataNext Hit lack the resolution necessary to obtain accurate modeling of the Sand basement. We develop a method to estimate the Sand base from Previous HitLandNext Hit streamer Previous HitseismicNext Hit Previous HitacquisitionNext Hit that is developed and geared to Sand surfaces. Previous HitLandNext Hit streamer Previous HitacquisitionNext Hit not only provides a more efficient Previous HitdataNext Hit Previous HitacquisitionNext Hit system than the conventional spiked geophone approuch, but in our case the Previous HitlandNext Hit streamer provided better quality Previous HitdataNext Hit, with broader frequency bandwidth. Such Previous HitdataNext Hit enabled us to do proper near surface velocity estimation that resulted in velocities that are very close to those measured using uphole methods. This fact is demonstrated on a couple of lines acquired near upholes, and the agreement between the Previous HitseismicTop velocities and the upholes is high.