دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

seismic data capable of showing a three dimensional image of the reservoir. Strictly, 3-D is a closely spaced grid of 2-D seismic lines with interpolation to create a seismic cube. The cube can be sliced vertically to create 2-D lines or sliced horizontal

n: 1. a hand tool that is powered pneumatically. 2. a chamber filled with compressed air, often used offshore in seismic exploration. As the gun is trailed behind a boat, air is released, making a low frequency popping noise, which penetrates the subsurface rock layers and is reflected by the layers. Sensitive hydrophones receive the reflections and transmit them to recording equipment on the boat.

seismic source for ocean seismic work.

n: Schlumberger wireline tool designed to acquire multilevel triaxial seismic data in cased holes. Provides high quality seismic images in relatively close proximity to the wellbore.

n: Schlumberger wireline tool that digitizes compressional, shear, and Stoneley waveforms and is designed to minimize the discrepancies between sonic and seismic data. Used for porosity evaluation, shear seismic correlation, thin bed detection, fracture pred

a device with moveable vanes attached to an under water seismic streamer.

a layer of rock that cannot be detected by seismic or in logging where the recorded resistivity is too low..

n: transverse or longitudinal seismic waves transmitted in the interior of an elastic solid or fluid and not related to a boundary surface.

n: a seismic phenomenon that shows up on a seismic, or record, section as a sound reflection that is much stronger than usual. A bright spot sometimes directly indicates natural gas in a trap. See record section.

a specific seismic reflection that may indicate gas.

determines formation seismic wave velocities over specific intervals. Measurement is made of travel time from surface to downhole geophones.