Crosswell reflection velocity analysis

Conference · Sat Dec 31 04:00:00 EST 1994

OSTI ID:80168

Smalley, N ^[1]

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1. Stanford Univ., CA (United States)

A method of cross-well reflection velocity analysis is introduced in this paper. It uses previously derived cross-well reflection moveout equations (Smalley, 1992). These moveout equations are based upon a previously derived cross-well CLP (common lateral point) stacking coordinate system (Smalley, 1992). The method showed in this paper has a similar objective to the surface seismic velocity analysis procedure. The authors are attempting to find velocities from the cross-well reflections that will give one an accurate depth conversion and can align the reflection data so that the stack will be optimized. The cross-well gather analogous to the surface seismic CMP gather (CLP-VLMO gather) is used to align reflection data so that the stack will be optimized. The theory is derived for the constant velocity case and then is extended to the variable velocity case. Real data gathers and a stack are shown using the cross-well reflection velocity analysis and are compared to a stack using a tomogram velocity. The stack using cross-well reflection velocity analysis shows a clear improvement from the constant velocity tomogram stack.

• OSTI ID: 80168
• Report Number(s): CONF-941015--
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
03 NATURAL GAS
58 GEOSCIENCES
ALGORITHMS
CORRECTIONS
DATA ANALYSIS
GEOLOGIC DEPOSITS
IMAGE PROCESSING
NATURAL GAS INDUSTRY
PETROLEUM INDUSTRY
SEISMIC SURVEYS