An experimental study on the complex resistivity of fractured rock under different saturation conditions

• Autorzy: Pan Baozhi , Ruhan A. , Guo Yuhang , Zhang Lihua , Wei Boyang , Zhou Weiyi

Identyfikatory

DOI

10.1007/s11600-022-00762-2

• Języki publikacji: EN

Abstrakty

EN

The fracture can be a good channel for oil and gas migration, which has a great influence on the permeability of the reservoir. Therefore, it is of major significance to identify fractures and determine the characterization parameters and physical proper ties of fractured reservoirs. In this study, homogeneous sandstone was used to simulate different artificially fractured rocks. The fractured rock samples had different fracture widths, fracture numbers, and fracture dip angles. In addition, the complex impedance and weights of the rock samples were measured during the process of natural evaporation, and the relationships between the water saturation and the complex resistivity values at different frequencies were examined. The frequency range is 100 Hz–10 kHz. It was found that the influence effects of frequency on the resistivity, dielectric constant, and loss factor had differed among the homogeneous samples and the fractured rock sample. The fracturing had led to the resistivity index and the water saturation curves separating under the different frequencies, and the degree of the dielectric constant index and water saturation curve separation became larger. Furthermore, the influencing effects of the fracture widths, fracture numbers, and fracture dip angles mainly occurred in terms of three aspects. The first was the slope of the resistivity index and water saturation curves (IR–Sw). The second was the slope of the dielectric constant index and water saturation curves (Iε–Sw), and the third was the loss tangent D and water saturation Sw curves.

Słowa kluczowe

EN

fractured rock; water saturation; conductivity; dielectric constant; medium frequency; low frequency; complex resistivity

PL

popękane skały; nasycenie wodą; przewodność; stała dielektryczna; średnia częstotliwość; niska częstotliwość

• Wydawca: Instytut Geofizyki PAN ; Springer
• Czasopismo: Acta Geophysica
• Rocznik: 2022
• Tom: Vol. 70, no 3
• Strony: 1061--1081
• Opis fizyczny: Bibliogr. 25 poz.

Twórcy

autor

Pan Baozhi

• College of Geo-Exploration Science and Technology, Jilin University, Changchun, China

autor

Ruhan A.

• College of Geo-Exploration Science and Technology, Jilin University, Changchun, China

autor

Guo Yuhang

• College of Geo-Exploration Science and Technology, Jilin University, Changchun, China

• https://orcid.org/0000-0001-6673-3440

autor

Zhang Lihua

• College of Geo-Exploration Science and Technology, Jilin University, Changchun, China

autor

Wei Boyang

• College of Geo-Exploration Science and Technology, Jilin University, Changchun, China

autor

Zhou Weiyi

• College of Geo-Exploration Science and Technology, Jilin University, Changchun, China

Bibliografia

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Uwagi

PL

Opracowanie rekordu ze środków MEiN, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2022-2023).