Effective methods for improving signal/noise ratio of seismic data collected from heavy noisy area

Journal Article · Mon Dec 31 23:00:00 EST 1990 · Oil Geophysical Prospecting; (China)

OSTI ID:5606186

Chuankun, L ^[1]

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1. Fourth Geophysical Exploration Brigade, Ministry of Geology and Minerals, Hongmen, Xinxiang City, Henan Province (CN)

This paper reports on the Jiyuan depression which is the hydrocarbon-bearing area discovered earliest in North China. Terribly complicated seismic-geological condition and very heavy multitudinous noises result in very low signal/noise ratio of seismic data in this area, which severely obstructed hydrocarbon exploration in this area. Hence, research of seismic methods for this area has been made systematically. Reasonable seismic data acquisition parameters were determined by making detailed surface-layer analysis and overall field tests, and by designing expert system with the use of spectral analysis data and field operation data. Consequently, special field method (including deep shot hole, big array length, high stacking fold and high low-cut filtering) was adopted to improve raw seismic data obviously. Furthermore, good static correction, correct stack velocity and reasonable prestack two-dimensional filtering were used to remove seismic noise in data processing. The above methods can improve signal/noise ratio and result in qualified seismic data which favor structural and lithologic interpretations.

• OSTI ID: 5606186
• Journal Information: Oil Geophysical Prospecting; (China), Journal Name: Oil Geophysical Prospecting; (China) Vol. 26:5; ISSN 1000-7210; ISSN SDWKE
• Country of Publication: United States
• Language: Chinese

Related Subjects

02 PETROLEUM
020200* -- Petroleum-- Reserves
Geology
& Exploration
DATA ACQUISITION
DATA PROCESSING
FIELD TESTS
GEOLOGIC DEPOSITS
GEOPHYSICAL SURVEYS
HYDROCARBONS
MINERAL RESOURCES
NOISE
OIL FIELDS
ORGANIC COMPOUNDS
PETROLEUM DEPOSITS
PROCESSING
RESOURCES
SEISMIC NOISE
SEISMIC SURVEYS
SIGNAL-TO-NOISE RATIO
SURVEYS
TESTING