Subsurface structural mapping from high-resolution gravity data using advanced processing methods

Pham, Luan Thanh; Nguyen, Duong Thuy; Eldosouky, Ahmed M.; Abdelrahman, Kamal; Vu, Tich Van; Al-Otaibi, Naif; Ibrahim, Elkhedr; Kharbish, Sherif

doi:10.1016/j.jksus.2021.101488

Cited by 17 publications

(2 citation statements)

References 40 publications

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“…With the development of potential field data processing methods, many scholars have also studied the application of various data processing methods in case data in recent years [41][42][43][44]. Pham et al [45] effectively delineated the main structural lineament of southern Vietnam by using different techniques to process real gravity data.…”

Section: Introductionmentioning

confidence: 99%

A Novel Method of Magnetic Sources Edge Detection Based on Gradient Tensor

Lv,

Huang,

Yang

et al. 2024

Minerals

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The edge detection method based on the magnetic gradient tensor data plays an important role in magnetic exploration because it is free from geomagnetic interference and contains more abundant information. This paper proposes a new anomaly edge detection method using the magnetic gradient tensor components. The model is established to compare with other methods, such as directional total horizontal derivative (THDz), analytical signal (AS), tilt angle, theta map, and so on, under conditions of vertical magnetization, oblique magnetization, and noise interference. Through the study of the anomaly distribution of the rectangular model, it is observed that the edge detection method proposed in this paper is nearly impervious to noise interference, exhibits strong anti-interference capabilities, delivers a high-quality boundary identification effect, and provides greater accuracy in anomaly edges with minimal error. When multiple anomalous bodies are present, the edge detection results are less susceptible to interference from each other, resulting in higher resolution. The efficiency of the algorithm is demonstrated by real magnetic data from some study areas in Jiangxi Province, China. The experimental results show that the proposed method is more precise and accurate than the total horizontal derivative, analytical signal, tilt angle, and theta map methods.

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Section: Introductionmentioning

confidence: 99%

A Novel Method of Magnetic Sources Edge Detection Based on Gradient Tensor

Lv,

Huang,

Yang

et al. 2024

Minerals

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“…Ref. [42] described the lineament of the Thua Thien Hue area using Bouguer Gravity anomaly data. Ref.…”

Section: Introductionmentioning

confidence: 99%

Research on the Tectonic Characteristics and Hydrocarbon Prospects in the Northern Area of the South Yellow Sea Based on Gravity and Magnetic Data

Yao

et al. 2023

Minerals

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To further explore the geological structure and the Mesozoic–Paleozoic hydrocarbon prospects in the northern area of the South Yellow Sea (SYS), multiple geological and geophysical data were systematically gathered and compiled, including gravity and magnetic data, seismic surveys, drilling data, and previous research results. The characteristics and genesis of the gravity and magnetic anomalies are examined. This study employs residual gravity anomalies and multiple edge detection methods to identify fault lineament structures and assess the tectonic framework. Moreover, the study utilizes 2.5D gravity-seismic joint modellings and regression analysis to estimate the basement depth. Additionally, the study examines the basement characteristics and discusses the thickness of the Mesozoic–Paleozoic strata. Finally, the study further identifies prospects for hydrocarbons in the Mesozoic–Paleozoic. Our findings show that the faults are incredibly abundant and that the intensity of fault activity weakens gradually from NW to SE. Specifically, NE (NEE) trending faults are interlaced and cut off by NW (NWW), near-EW, and near-SN trending secondary faults, which form an en-echelon composite faults system with a dominant NE (NEE) orientation. Thick Mesozoic–Paleozoic strata are preserved, but we observe distinct variations in basement characteristics and the pre-Cenozoic structural deformation along the N-S direction. Therefore, the Northern Basin of SYS (NBSYS) and the Middle Uplift of SYS (MUSYS) are characterized by alternating sags and bulges in the S-N direction and in the E-W direction, respectively, forming a chessboard tectonic framework. Considering the oil and gas accumulation model, we identify three target hydrocarbon prospects in the NBSYS and two favorable hydrocarbon prospects in the MUSYS.

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