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Hebei, China

Chai Y.,BGP Inc.
Shiyou Diqiu Wuli Kantan/Oil Geophysical Prospecting | Year: 2012

Using RTP A-E equation as theoretical tool, we discus in this paper the respective error laws of the three kinds of wavenumber domain RTP methods of magnetic anomaly at low latitudes. Thereafter, we give our effect evaluation, function position and definition of application condition for these RTP methods. The suppression RTP methods can only be applied to qualitative interpretation of magnetic anomaly at low latitudes. The inversion RTP method may be applied to quantitative interpretation of magnetic anomaly at low latitudes if data completely cover anomalies and the edge data condition is simple. The shift sampling methods may also be applied to quantitative interpretation of magnetic anomaly at low latitudes if data completely cover anomalies, the high precision of the edge data is more 0.2%, and the defined data size in declination is less than 64.The revelation of error law of the inversion RTP method by RTP A-E equation is an important theoretical complement which makes the inversion RTP method more rigorous and perfective. The v-axis separation method derived in this paper can be considered as an improvement of the shift sampling RTP methods. Source


Luo F.,BGP Inc.
Shiyou Diqiu Wuli Kantan/Oil Geophysical Prospecting | Year: 2012

In order to receive better quality signals, geophone arrays are usually used to acquire seismic waves in petroleum seismic prospecting. Geophone array response attributes are different from those of single geophone in terms of electrical characteristics. Improvement of geophone array's receiving ability is usually emphasized, but response attributes are ignored. Based on geophone structure and field test data, this paper introduces the principle & characteristics about the change of geophone array response attributes and discusses effects of geophone array response attributes on seismic data acquisition. Source


Luo F.-L.,BGP Inc.
Shiyou Diqiu Wuli Kantan/Oil Geophysical Prospecting | Year: 2010

Seismic prospecting instrument is core equipment for seismic data acquisition. In order to match amplitude and frequency characteristics of the input seismic signals, a set of working parameters are set. Among the parameters the sample interval and pre-amplifier gain are the most important ones. In this paper several important aspects, such as the physical meaning of the seismic instrument acquisition parameters, main functions, and their impacts on seismic signals, were studied first, then the relationship between seismic instrument acquisition parameters and seismic instrument operation performance, and the selection principles and methods of the seismic data acquisition were systematically discussed, as a result the reference can be provided for more efficient use of the seismic acquisition instrument. Source


Shi S.,BGP Inc.
Shiyou Diqiu Wuli Kantan/Oil Geophysical Prospecting | Year: 2016

Nowadays more and more seismic surveys are carried out in some places with lots of obstacles such as urban area, industrial area, oilfields, and others. The large number of obstacles causes seismic data lacking zones, which brings uncertainty of the follow-up seismic data processing and interpretation. We propose in this paper a few approaches to reduce seismic acquisition blank zones and improve data integrity such as receiver point multi-move positioning, automatic obstacle avoidance, and flexible operation safe distance calibration. Our practices show that these approaches achieve satisfactory results. © 2016, Editorial Department OIL GEOPHYSICAL PROSPECTING. All right reserved. Source


Zhang G.-L.,BGP Inc.
Chinese Journal of Geophysics (Acta Geophysica Sinica) | Year: 2011

In this paper, we take the advantage of high time-frequency resolution of the improved generalized S transform and use the time-frequency spectrum at low frequency to determine seismic attenuation gradient, then compare the result with the attenuation gradient based on conventional generalized S transform in order to get better oil and gas indication. The theoretical analysis, numerical simulation, and application of results show that the low-frequency absorption attenuation gradient based on improved generalized S transform and the high-frequency absorption attenuation gradient based on conventional generalized S transform can mutually support each other and better indicate the existence of oil and gas. Source

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