A laboratory measurement technique for axial and radial resistivity at ambient or reservoir stress state conditions

Abousrafa, Emhemed Mohamed; Somerville, James McLean; Hamilton, Sally Ann; Olden, Peter

doi:10.1016/j.petrol.2013.01.011

Cited by 4 publications

(2 citation statements)

References 15 publications

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“…Elektroda dibuat dari lempengan tembaga yang menyentuh langsung ke batuan, dimampatkan, dan dihubungkan ke resistivity meter (Abousrafa, 2013) (Gambar 5a). Variabel yang terukur pada resistivity meter ini berupa arus injeksi yang mengalir masuk ke batuan (Ampere) dan beda potensial di kedua ujung batuan (Volt).…”

Section: Metode Penelitianunclassified

Karakterisasi Parameter Fisik Batuan Vulkanik Gunung Arjuno-Welirang, Jawa Timur

Fajrina

2016

Jurnal Geosaintek

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Abstrak. Sebuah kawasan yang memiliki aktivitas vulkanik, mempunyai potensi sumber daya yang dapat dimanfaatkan sebagai sumber energi panas bumi hingga cadangan hidrokarbon. Namun eksplorasi untuk lingkungan vulkanik masih menjadi tantangan terutama untuk metode seismik.Tujuan dari penelitian ini ialah untuk mengkarakterisasi fisik dan analisa hubungan antara parameter densitas, kecepatan Vp, atenuasi, dan resistivitas pada batuan vulkanik studi kasus Gunung Arjuno-Welirang. Penelitian diawali dengan pengambilan sampel di lapangan dan pembuatan coring batuan sehingga didapatkan 45 coring batuan, dari 16 sampel batuan, yang mewakili 6 satuan batuan. Kemudian dilakukan pengukuran parameter resistivitas dengan metode konfigurasi axial resistivity, pengukuran densitas dengan prinsip Archimedes, dan pengukuran kecepatan Vp serta atenuasi dengan transmisi gelombang ultrasonik. Maka didapatkan hasil rentang parameter densitas batuan vulkanik ArjunoWelirang berkisar antar 2400 -2900 kg/m 3 , sedangkan rentang resistivitas bervariasi dari 30-185 kOhm.m. Kemudian rentang nilai kecepatan Vp bervariasi dari 5100-6700 m/s, dengan koefisien atenuasinya memiliki rentang 0.05-0.23x10 -3 dB/m, dimana nilai densitas akan berbanding lurus dengan kecepatan Vp, dan nilai resistivitas akan berbanding terbalik dengan densitas-kecepatan Vp. Berdasarkan perbedaan trend dan sebaran data pada crossplot, maka batuan vulkanik sampel dapat dikelompokkan 3 kategori produk batuan vulkanik, yakni produk kategori lava, piroklastik, dan lava vesikular.

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Section: Metode Penelitianunclassified

Karakterisasi Parameter Fisik Batuan Vulkanik Gunung Arjuno-Welirang, Jawa Timur

Fajrina

2016

Jurnal Geosaintek

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“…Many scholars have made much effort in this regard and accomplished a great deal. As for studies on the anisotropy of the rock conductivity, scholars have mainly examined the anisotropic characteristics of the conductivity during the failure process by means of numerical simulations [ 4 , 5 ], laboratory tests and field measurements [ 6 , 7 ]. Specifically, Zhu et al [ 8 ] and Wang et al [ 9 ] summarized the existing studies in terms of the preceding aspects and reviewed their application in studies on earthquake monitoring and prediction.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Conductivity Anisotropy of Limestone Considering the Bedding Directional Effect in the Whole Process of Uniaxial Compression

Liu

et al. 2016

Materials

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Experimental studies were conducted on the changes of the potential differences in different directions during the uniaxial compression on limestone samples parallel and normal to the bedding plane. In the test, electric current was supplied at both ends of the samples, and concurrent measurement was conducted in four measuring lines at a 45-degree angle to each other. First, the change laws of the potential differences in different directions and the similarities and differences of rock samples were summarized. In regards to the uniaxial compression properties and crack growth, the above-mentioned similarities and differences were further analyzed. Then, the anisotropy factor was introduced to further explore the response characteristics. It was found that the anisotropic changes of rock samples went through three stages during the uniaxial compression process, providing a reference for describing the properties in different failure stages of rock samples and obtaining precursory information about the fracture. Besides, the relationship between the peak stress and initial potential difference in a direction normal to the current direction was obtained by means of data fitting, providing a new method of predicting the uniaxial compressive strength of rock samples. According to the preceding analysis, this paper studied rock anisotropy by considering the bedding directional effect in terms of conductivity and provided a reference for subsequent study on rock materials' properties and engineering practices.

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Preliminary experiments towards understanding the influence of fractures on the anisotropy of electrical conductivity

Mohammed

Schmitt

2020

Journal of Applied Geophysics

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A laboratory measurement technique for axial and radial resistivity at ambient or reservoir stress state conditions

Cited by 4 publications

References 15 publications

Karakterisasi Parameter Fisik Batuan Vulkanik Gunung Arjuno-Welirang, Jawa Timur

Karakterisasi Parameter Fisik Batuan Vulkanik Gunung Arjuno-Welirang, Jawa Timur

Experimental Study on Conductivity Anisotropy of Limestone Considering the Bedding Directional Effect in the Whole Process of Uniaxial Compression

Preliminary experiments towards understanding the influence of fractures on the anisotropy of electrical conductivity

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