Determination of lateral interval-velocity variation using travel time inversion

Journal Article · Wed Jan 01 04:00:00 EST 1992 · Oil Geophysical Prospecting; (China)

OSTI ID:5605501

Zhou, X; Zhong, B; Wang, Y; Liu, Z; Tang, Z; Guan, Y; Li, H ^[1]

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1. Chengdu Geology College, Chengdu City, Sichuan Province (CN)

Lateral interval-velocity variation in a target stratum can be determined by performing travel time inversion of prestack common-short gathers (or common-midpoint gathers). Interval velocities are evaluated by minimizing the difference between observed travel time and travel time derived from forward modeling in oil-geophysical prospecting applications. Ideally, this method is identical with seismic reflection tomography, which, however, involves more parameters, so that inversion process is unstable, and solution multiple, Some measures, such as reasonable geological model, equivalent layer and equalization of Jacobi matrix elements, are taken to achieve less parameters, stable inversion process and definite solution. Good results have been obtained in the practice. In this paper travel time inversion principle and relevant technical problems are discussed, and work steps given. The example is given of applying this method to Daqing seismic data inversion.

• OSTI ID: 5605501
• Journal Information: Oil Geophysical Prospecting; (China), Journal Name: Oil Geophysical Prospecting; (China) Vol. 27:1; ISSN SDWKE; ISSN 1000-7210
• Country of Publication: United States
• Language: Chinese

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DATA PROCESSING
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