1 / 16

FIELD GEOMETRY FOR MULTICHANNEL SEISMIC (MCS) PROFILES

Introduction to Seismic Reflection Imaging: Pt 2. FIELD GEOMETRY FOR MULTICHANNEL SEISMIC (MCS) PROFILES. Layouts for a comon-shot gather; a cmmon mid-point gather; and a common receiver gather.

yanni
Download Presentation

FIELD GEOMETRY FOR MULTICHANNEL SEISMIC (MCS) PROFILES

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Introduction to Seismic Reflection Imaging: Pt 2 FIELD GEOMETRY FOR MULTICHANNEL SEISMIC (MCS) PROFILES

  2. Layouts for • a comon-shot gather; • a cmmon mid-point gather; and • a common receiver gather.

  3. Sequence of survey layouts to acquire a 6-fold coverage; S indicates the source and G a geophone (or hydrophone). Fold = N/2n where N = total number of receiver groups; n = number of group intervals moved between shots

  4. Results of common mid-point (CMP) stacks showing improvement in imaging for summations of 6, 18 and 48 shot-receiver pairs.

  5. Composite shallow reflection record made up of five separate 12-channel records, each of which was recorded with a different time delay between the shot instant and the start of recording. • Corresponding time-distance graph identifying the major seismic events on the record. The optimum window is that range of source-receiver separations that allows the target reflection to be observed without interference from other events.

  6. Example of a common mid-point gather

  7. Some Examples of Shot Gathers

  8. The application of a time-varying gain function to a waveform exhibiting spherical divergence, in order to recover signal amplitudes at later travel times. Gain functions are applied in discrete windows(labelled 1 to 5 as shown).

  9. Types of filters: (A) bandpass; (B) low-cut (high-pass); (C) high-cut (low-pass); (D) notch.

  10. unfiltered filtered

More Related