Preliminary anisotropy research using S-wave velocity; An application of multiwave exploration data

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

OSTI ID:5666950

Fuqiu, D; Jianhou, T ^[1]

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1. Geological Survey Div., Sichuan Oil Management Bureau, Nanchong City, Sichuan Province (CN)

This paper reports on the anisotropy of medium in HBC area in Sichuan Province that was found in the processing and interpretation of P and SH wave data. Shear wave passing through anisotropic medium splits into two different waves; fast shear wave whose polarization direction is parallel to fracture trend in formations, and the slow shear wave that polarizes in the direction perpendicular to fracture trend. Fast and slow shear wave sections can be respectively obtained by using different layouts and data processing methods. The anisotropy coefficient can be derived from the travel times of fast and slow S-waves arriving at the same interface; it can also be obtained from the ratio of SH-wave velocity to converted wave velocity. Anisotropy coefficient reflects fracture density. Then the direction of fracture zone can be determined by making both X, Y- component detection in data acquisition and coordinate revolution in data processing. Without the above measures taken, we can roughly determine the direction of fracture zone in the light of structure-line trend.

• OSTI ID: 5666950
• Journal Information: Oil Geophysical Prospecting; (China), Journal Name: Oil Geophysical Prospecting; (China) Vol. 27:2; ISSN SDWKE; ISSN 1000-7210
• Country of Publication: United States
• Language: Chinese

Related Subjects

02 PETROLEUM
020200* -- Petroleum-- Reserves
Geology
& Exploration
29 ENERGY PLANNING, POLICY, AND ECONOMY
294002 -- Energy Planning & Policy-- Petroleum
ANISOTROPY
ASIA
CHINA
DATA PROCESSING
DRILLING
EXPLORATION
GEOLOGIC FRACTURES
GEOLOGIC STRUCTURES
GEOPHYSICAL SURVEYS
PLANNING
PROCESSING
RESEARCH PROGRAMS
SEISMIC S WAVES
SEISMIC SURVEYS
SEISMIC WAVES
SURVEYS
VELOCITY
WELL DRILLING