Pre-stack interpretation for depth mapping
The efficient location and development of oil and gas reserves require the integration of their technical disciplines and close cooperation among geologists, geophysicists and engineers. Yet, they have a problem. The geologist and engineer measure their information in terms of depth below a datum, while the geophysicist is forced to take his measurements in two-way time. In the early stages of exploration, velocity surveys were rare. They assumed that the relationship between time and depth was relatively simple, changing slowly across the basin. As more data were obtained, particularly when they got two or more velocity surveys in the same field, they found that the time/depth relationships were complex. What is a stacking velocity. What is the relationship between stacking velocity and RMS or average velocity. How accurately can they determine RMS velocities from stacking velocities. How does a refraction model compare to a model derived from stacking velocities. An IBM PC-AT with an attached 9-track tape drive has been used to compute stacking velocities, residual statics, and a refraction model from marine data in the presence of 200 m/sec of time distortion caused by near-surface velocity variations. These results illustrate what can be done by an interpreter to improve his understanding of the relationship between time and depth within his prospect area.
- Research Organization:
- Resource Technologies, Houston, TX (USA)
- OSTI ID:
- 6835236
- Report Number(s):
- CONF-8804144-
- Journal Information:
- AAPG Bull.; (United States), Vol. 72:3; Conference: AAPG SEPM-SEG Pacific Section and SPWLA annual convention, Santa Barbara, CA, USA, 17 Apr 1988
- Country of Publication:
- United States
- Language:
- English
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