Hernomita, Desti (2023) Analisis Sensistivitas Pengaruh Geomekanik Terhadap Keberhasilan Hydraulic Fracturing Pada Reservoir Shale Gas. Other thesis, Fakultas Teknik Perminyakan.

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Abstract

Shale gas has a permeability of <0.1 mD and a porosity of around 2% - 8% to produce gas to rise to the surface through hydraulic fracturing and horizontal drilling. Geomechanics is an important part that influences the success of a hydraulic fracturing job. The technology in fracking makes geomechanics a clear factor in predicting the success or failure of rocks in deformation and knowing the properties that will be faced by the fracturing fluid which will later be used to see the effectiveness of the fracturing fluid in resisting fractures. The high operational costs need to be further studied to find out the parameters that affect the hydraulic fracturing work, especially from the geomechanical aspect to minimize production failures and safety during the work. The research conducted this time focuses on the sensitivity of geomechanical parameters by using reservoir CMG (GEM) simulations for reservoir models and conducting Response Surface Methodology (RSM) in selecting and facilitating when applied in the field. This sensitivity study was carried out on 5 parameters, namely stress, Poisson ratio, Young's modulus, biot's coefficient and pore pressure. The most influential geomechanical parameter when the hydraulic fracturing job was carried out through 500 data sets using the Analysis of Variance was obtained R2 = 0.99 with the results based on variable importance being 3.8 pore pressure. Then, young's modulus is 0.28, stress is 0.12, Poisson ratio is 0.08 and biot coefficient is 0.04.

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