Study of near-surface detection of the high precision seismic exploration in Shengli Oil field

Regarding the South Caspian oil and gas province, it is concluded that the Pliocene productivity prevails in the western part of the province, and that the gas and oil prospects of the eastern land side in the Mesozoic are prioritized. A retrospective analytical review of geological and geophysical data and publications on the Mesozoic of Southwestern Turkmenistan was carried out, which showed the low efficiency of the performed seismic and drilling operations in the exploration and evaluation of very complex Mesozoic objects. A massive resumption of state-of-the-art seismic exploration and appraisal drilling in priority areas and facilities performed by leading Russian companies is proposed. For some areas, a new, increased estimate of the projected gas resources is given. An example of modern high-efficiency additional exploration of the East Cheleken, a small Pliocene gas and oil field, which turned this field into a large one in terms of reserves, is given.

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Integrated Seismic Exploration for Open-Cut Mining: The Importance of the Near Surface

First Break ◽

10.3997/1365-2397.fb2021065 ◽

2021 ◽

Vol 39 (8) ◽

pp. 87-93

Author(s):

Claudio Strobbia ◽

Simone Re ◽

Tim Dean ◽

Matthew Grant ◽

Martin Bayly ◽

...

Keyword(s):

Seismic Exploration ◽

Near Surface

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Slant f-k transform of multichannel seismic surface wave data

Geophysics ◽

10.1190/geo2018-0430.1 ◽

2019 ◽

Vol 84 (1) ◽

pp. A19-A24 ◽

Cited By ~ 4

Author(s):

Aleksander S. Serdyukov ◽

Aleksander V. Yablokov ◽

Anton A. Duchkov ◽

Anton A. Azarov ◽

Valery D. Baranov

Keyword(s):

Surface Wave ◽

Seismic Data ◽

Signal To Noise Ratio ◽

Velocity Estimation ◽

Seismic Exploration ◽

Spectral Processing ◽

Near Surface ◽

Frequency Time Representation ◽

Time Representation ◽

S Transform

We have addressed the problem of estimating surface-wave phase velocities through the spectral processing of seismic data. This is the key step of the well-known near-surface seismic exploration method, called multichannel analysis of surface waves. To increase the accuracy and ensure the unambiguity of the selection of dispersion curves, we have developed a new version of the frequency-wavenumber ([Formula: see text]-[Formula: see text]) transform based on the S-transform. We obtain the frequency-time representation of seismic data. We analyze the obtained S-transform frequency-time representation in a slant-stacking manner but use a spatial Fourier transform instead of amplitude stacking. Finally, we build the [Formula: see text]-[Formula: see text] image by analyzing the spatial spectra for different steering values of the surface-wave group velocities. The time localization of the surface-wave packet at each frequency increases the signal-to-noise ratio because of an exclusion of noise in other time steps (which does not fall in the effective width of the corresponding wavelet). The new [Formula: see text]-[Formula: see text] transform, i.e., the slant [Formula: see text]-[Formula: see text] (SFK) transform, renders a better spectral analysis than the conventional [Formula: see text]-[Formula: see text] transform and yields more accurate phase-velocity estimation, which is critical for the surface-wave analysis. The advantages of the SFK transform have been confirmed by synthetic- and field-data processing.

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Development of high-precision distributed wireless microseismic acquisition stations

10.5194/gi-2018-17 ◽

2018 ◽

Author(s):

Shuaiqing Qiao ◽

Hongmei Duan ◽

Qisheng Zhang ◽

Qimao Zhang ◽

Shuhan Li ◽

...

Keyword(s):

Data Acquisition ◽

High Precision ◽

Oil And Gas ◽

Data Communication ◽

Microseismic Monitoring ◽

Acquisition System ◽

Seismic Exploration ◽

High Signal ◽

Control Board ◽

High Data

Abstract. In recent years, owing to the shortage of oil and gas resources and increased difficulty in mining, traditional (wired) microseismic monitoring equipment has been unable to meet the needs of energy exploitation. Therefore, it is necessary to develop new high-precision seismic exploration and data acquisition systems. In this study, we combined advance acquisition systems with wireless technology to develop a new wireless microseismic acquisition system. The hardware circuit of the acquisition system mainly included a data acquisition board and a main control board. High-precision analog-to-digital conversion and digital filtering technologies were used to provide data with high signal-to-noise ratios, resolution, and fidelity to the acquisition stations. Key technologies were integrated into the ARM of the main control board. Reliable GPS technology was employed to realize synchronous acquisitions among various acquisition stations, and WIFI technology was used to achieve wireless data communication between acquisition stations and the central station, thus improving the data transmission speed and accuracy. After conducting a series of evaluation tests, it was found that the system was stable, convenient to use, and had high data accuracy, therefore providing significant support for the solution to problems encountered in current oil and gas exploration processes, such as the complicated environment and inconvenient construction.

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Epigenetic Zoning in Surface and Near-Surface Rocks Resulting from Seepage-Induced Redox Gradients, Velma Oil Field, Oklahoma: ABSTRACT

AAPG Bulletin ◽

10.1306/2f919d73-16ce-11d7-8645000102c1865d ◽

1981 ◽

Vol 65 ◽

Author(s):

Terrence J. Donovan, Alan A. Robert

Keyword(s):

Oil Field ◽

Near Surface ◽

Redox Gradients

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Analyzing the effectiveness of receiver arrays for multicomponent seismic exploration

Geophysics ◽

10.1190/1.1527085 ◽

2002 ◽

Vol 67 (6) ◽

pp. 1853-1868 ◽

Cited By ~ 16

Author(s):

Brian H. Hoffe ◽

Gary F. Margrave ◽

Robert R. Stewart ◽

Darren S. Foltinek ◽

Henry C. Bland ◽

...

Keyword(s):

Oil Field ◽

Seismic Exploration ◽

Common Source ◽

Coherent Noise ◽

Significant Deterioration ◽

Seismic Line ◽

Noise Rejection ◽

Seismic Image ◽

Receiver Arrays

This paper uses an experimental seismic line recorded with three‐component (3C) receivers to develop a case history demonstrating very little benefit from receiver arrays as compared to point receivers. Two common array designs are tested; they are detrimental to the P‐S wavefield and provide little additional benefit for P‐P data. The seismic data are a 3C 2‐D line recorded at closely spaced (2 m) point receivers over the Blackfoot oil field, Alberta. The 3C receiver arrays are constructed by summing five (one group interval) and ten (two group intervals) point receivers. The shorter array emphasizes signal preservation while the longer array places priority on noise rejection. The effectiveness of the arrays versus the single geophones is compared in both the t−x and f−k domains of common source gathers. The quality of poststack data is also compared by analyzing the f−x spectra for signal bandwidth on both the vertical receiver component (P‐P) and radial receiver component (P‐S) structure stacks produced using these two array design philosophies. The prestack analysis shows that the two arrays effectively suppress coherent noise on both the vertical and radial geophone data and perform reasonably as spatial antialias filters. The poststack analysis reveals that, for both the P‐P and P‐S data, neither of the two arrays significantly improves the quality of the final seismic image over that obtained from point receiver data. For the P‐P data there are subtle differences between the final stacked sections, while for the P‐S data there is a significant deterioration in image quality from the application of the arrays. This P‐S image deterioration is attributed to significant variation of shear‐wave statics across the array. For this specific survey area and acquisition parameters, 3C receiver arrays are unnecessary for P‐P data and are detrimental to P‐S data.

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Seismic mapping of on-shore sediments at Andøya, Norway, deposited prior to the North Atlantic rifting

Interpretation ◽

10.1190/int-2020-0054.1 ◽

2020 ◽

Vol 8 (4) ◽

pp. SQ105-SQ114

Author(s):

Tor Arne Johansen ◽

Bent Ole Ruud ◽

Tormod Henningsen ◽

Marco Brönner

Keyword(s):

North Atlantic ◽

Seismic Velocity ◽

Traffic Noise ◽

Seismic Exploration ◽

Small Scale ◽

Near Surface ◽

The North ◽

Seismic Surveying ◽

The North Atlantic ◽

Seismic Velocity Contrasts

Andøya is an island in the north of Norway. On its eastern side, it contains a local downfaulted basin of Mesozoic sediments sheltered from erosion during subsequent periods of Pleistocene glaciation. The sediments were deposited before the North Atlantic rifting and partly overlie weathered basement. We have recently carried out seismic surveying to better understand the geometry and seismic responses of the basin system. Extensive civil infrastructure and wet mire made the study area challenging for seismic exploration. We shot the survey lines at wet mire with detonating cord during winter when the mire was frozen. In the summer, we conducted seismic surveying along road shoulders with a small-scale vibrator. The seismic processing was particularly challenging due to the influence of traffic noise, heterogeneous near-surface conditions, and large seismic velocity contrasts. We interpreted the seismic lines in integration with other geophysical data and well logs to obtain a consistent and best possible seismic model of the basin. Our interpretation indicates a reorganization of the regional paleostress regime that took place during the continental breakup in the Eocene. In spite of severe obstacles for seismic surveying of the area, our results honor the robustness of the seismic method for subsurface imaging.

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