Field testing of the surface electromagnetic prospecting system

Qing-yun, DI; Fu, Changmin; An, Zhongfu; Xu, Cheng; Wang, Yalu; Wang, Zhongxing

doi:10.1007/s11770-017-0639-4

Cited by 15 publications

(7 citation statements)

References 12 publications

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“…How to improve the success rate of deep reservoir exploration is a permanent problem in the petroleum industry. Di et al measured the electrical information of the strata by means of electromagnetic exploration, detected the complex terrain, complex media, fine structures, and water-bearing features within engineering structures [77][78][79]. It has been successfully applied in the areas of Alashan in the Inner Mongolia Autonomous Region and Fengtai in Shaanxi Province, and found abundant mineral resources [80][81][82].…”

Section: Discussionmentioning

confidence: 99%

Three-Dimensional Geophysical Characterization of Deeply Buried Paleokarst System in the Tahe Oilfield, Tarim Basin, China

Tian

Wang

Fang

et al. 2019

Water

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Paleokarst reservoirs are the major type of the Ordovician carbonate reservoirs in the Tahe Oilfield. Due to the strong heterogeneity in distribution, it is a real challenge to detect the spatial distribution of paleokarst reservoirs, especially those deeply buried more than 5500 m in the Tahe area. Based on the abundant core samples, this paper first described the structure of paleocaves drilled by well. Second, after time–depth conversions, the results from drilled wells were tied to three-dimensional (3D) seismic datasets, and then the threshold of host rocks and caves in wave impedance were identified. Third, the seismic-scale mapping and visualization of the paleokarst reservoirs were achieved by tracing the distribution of paleocaves. This approach was applied in the well T403 area, and the structure of the paleokarst, especially the runoff zone, was interpreted. 3D structure and spatial distribution of the paleokarst system was demonstrated by plane, vertical, and 3D models. Additionally, according to the hydrology genetic relationships, the paleocaves in the runoff zone were divided into sinkholes, main channel, and branch channel. The approach of a 3D geophysical characterization of a deeply buried paleokarst system can be applicable to Tahe and other similar paleokarst oilfields, which will guide hydrocarbon exploration in paleokarst reservoirs.

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Section: Discussionmentioning

confidence: 99%

Three-Dimensional Geophysical Characterization of Deeply Buried Paleokarst System in the Tahe Oilfield, Tarim Basin, China

Tian

Wang

Fang

et al. 2019

Water

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“…The small signal model was extracted for discussion, and the derivation process was similar. The small signal state space equation obtained was shown in (1).…”

Section: Equivalent Circuitmentioning

confidence: 99%

“…Electromagnetic method has always been an important part of geophysical exploration, which is widely used in the field of electromagnetic exploration, involving in hydrology, geology, mine safety, archeological research, marine exploration, energy exploration and other fields [1][2][3][4]. In the aspect of electromagnetic transmitter, the electrical source transmitter includes TXU-30, a transmitter for V8 multi-function electrical instrument of Phoenix geophysics company of Canada [5,6], with a transmission parameters of 1000 V/20 A or 500 V/40 A.…”

Section: Introductionmentioning

confidence: 99%

Voltage Equalizing Strategy for Cascaded Constant Current Power Supply

Zhang,

Shi,

2024

IEEJ Transactions Elec Engng

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In order to detect the underground medium with large depth, the transmitter of electromagnetic sounding instrument has higher and higher power and voltage. A novel voltage equalizing strategy for cascaded constant current power supply using in electromagnetic transmitter was proposed in this paper. The cascaded topology of the transmitter has two isolated full‐bridge AC/DC converters, which had same input source and were connected in series on the output side. The mathematical model based on state space average method was analyzed. After simplifying the circuit, the state space equation was used to describe the circuit model. The stability and frequency characteristics of the system were analyzed. Aiming at the constant current output and the output voltage balance of the two converters, the system coupling model was established. The constant current controller and voltage equalizing controller were designed with decoupling method. A 300 W prototype was built and the experimental results verified the performance of the proposed method. © 2024 Institute of Electrical Engineer of Japan and Wiley Periodicals LLC.

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“…The largest order of the PRBS was 16, the max transmitting voltage was 1000V and the current was 50A, the max number of receiver channel was 200 (Di et al 2016). 6c) (Di et al 2017 ). The peak times of the collected data were extracted and used to calculate the subsurface apparent resistivity value.…”

Section: Mtem Detection Systemsmentioning

confidence: 99%

Development of the emerging electromagnetic methods for deep earth exploration

Xue

Wang

et al. 2019

Acta Geologica Sinica (Eng)

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Three emerging techniques for surface electromagnetic (EM) exploration with high detection accuracy and large depth of investigation, namely, WEM (wireless electromagnetic method), MTEM (multi-channel transient electromagnetic method) and SOTEM (short-offset grounded-wire TEM), are introduced. In detail, we proposed a newly developed sky-wave theory in which EM wave can propagate in full space of ionosphere-atmosphere-lithosphere. Correspondingly, we developed the WEM recording system to measure the sky-wave to obtain the structures down to ~10 km depth. We then introduced MTEM as a highly effective method for mineral exploration with target depth of 3km. Using selfdeveloped MTEM system, we presented the results obtained from mineral exploration study carried out in China. Lastly, we proposed the SOTEM method for a greater detection depth (1.5km) than traditional loop source TEM (500m) with a small offset and high resolution.

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Field testing of the surface electromagnetic prospecting system

Cited by 15 publications

References 12 publications

Three-Dimensional Geophysical Characterization of Deeply Buried Paleokarst System in the Tahe Oilfield, Tarim Basin, China

Three-Dimensional Geophysical Characterization of Deeply Buried Paleokarst System in the Tahe Oilfield, Tarim Basin, China

Voltage Equalizing Strategy for Cascaded Constant Current Power Supply

Development of the emerging electromagnetic methods for deep earth exploration

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