![]() Miners conduct quarrying and slope slicing to extract gold ores every day, resulting in changes on slope stability. This part of the reservoir could be a good candidate for hydraulic fracturing if it satisfies all other constraints for a prospective reservoir.Poboya Mountains is one of the gold mines located in Palu city. It was found from the computer-assisted approach and graphical presentation that, there was a high brittleness in the lower part of the reservoir which is due to highly compressed shale formation. Brittle-ductile categorization is done for identification of brittle, less brittle, less ductile and ductile reservoir lithology in each studied well. Brittle-ductile zone identification based on mechanical properties were giving consistent results. High values of young modulus and corresponding low values of Poison's ratio were indicating the brittle zones in the reservoir. Brittleness is estimated from empirical correlations based on mechanical properties estimated from well logs response, uniaxial compression strength and tensile strength. calculated using well log responses for selected reservoir section after a quality check of the data. In this study, the mechanical properties are. The estimation of mechanical properties of the reservoir rock is very important for the successful execution of reservoir drilling, production, and development operations. Jenis litologi dari 6 sampel batuan secara keseluruhan dapat diinterpretasikan sebagai Soft Sandstone.īrittleness and ductility play a very important role in the stimulation design of unconventional reservoirs as it controls the fracture length and shape of hydraulic fractures. Sedangkan nilai Modulus Young rata-rata yaitu 1,15 Gpa, dan Poisson’s Ratio yaitu 0,24. Berdasarkan hasil pengukuran dan pengolahan data, didapatkan nilai tegangan UCS rata-rata yaitu 7,71 Mpa, dan Tegangan elastisitas rata-rata yaitu 6,23 Mpa. Pengolahan data dilakukan dengan melakukan perhitungan dari hasil pembacaan data perubahan panjang (ΔL) dan diameter (ΔD), dan tegangan (σ), untuk mendapatkan nilai dari tiap sampel, yaitu: ɛlateral, ɛaksial, ɛvolumetrik, Poisson’s Ratio, Young’s Modulus. Sampel yang digunakan yaitu sampel batuan inti batu pasir dengan syarat panjang (L)/ diameter (D) = 2. Metode ini dilakukan dalam desain Hydraulic Fracturing. Metode Unconfined Compressive Strength (UCS) yaitu salah satu metode pengujian mekanika batuan dengan cara menekan batuan dari satu arah (horisontal) hingga batuan mengalami keruntuhan atau fracture. Poisson’s ratio merupakan nilai perbandingan antara regangan aksial dan elastisitas yang dimiliki batuan yang mampu menggambarkan litologi batuan dalam formasi. Elastisitas (modulus Young) batuan adalah suatu sifat mekanik yang menggambarkan seberapa besar nilai yang dimiliki suatu batuan untuk bertahan sebelum terjadinya deformasi. ![]()
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