Damayanti, Nabila Zafira
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Innovation in Hydraulic Fracturing Technology Using Ctafs in Production Optimization Strategy in Unconventional Reservoir Barnett Shale: A Geology and Rock Physics Based Approach Pratama, Fauzan Abiyyu; Nugraha, Fanata Yudha; Baiti, Aisah Nur; Damayanti, Nabila Zafira
Journal of Earth Energy Science, Engineering, and Technology Vol. 8 No. 2 (2025): JEESET VOL. 8 NO. 2 2025
Publisher : Penerbitan Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25105/xsetaz66

Abstract

The Barnett Shale is the largest unconventional hydrocarbon-producing rock formation in the United States. It consists of shale rocks with high-density mineral content such as smectite, silica, and carbonate, which result in low permeability and porosity. Hydraulic fracturing utilizing the coiled tubing activated frac sleeve completion system (CTAFS) is employed to enhance hydrocarbon production by fracturing the formation. The application of hydraulic fracturing can significantly boost production from the Barnett Shale. To optimize this method, geological analysis and rock physics properties are essential to derive parameters such as predictions of Young’s modulus and Poisson’s ratio in the exploration area. This study uses a systematic review approach based on previous research, supported by secondary data instrumentation including rock core validation and well data digitization, which are subsequently modeled into rock physics parameters. The rock physics model is used to simulate the elastic properties of the rock formation, considering the matrix, constituent composition, and rock heterogeneity. Furthermore, hydraulic fracturing simulations are conducted to predict production and determine the resulting strategies. The research findings indicate that in the interval 10,650–10,725 ft of the EnerGeo1 well, kerogen volumetrics are 18%, quartz 38%, clay 35%, and calcite 15%. The Young’s modulus value is 39.5 GPa, and the Poisson’s ratio is 25.2%, categorizing it as Type 1. In the interval 10,725–10,803 ft, kerogen volumetrics are 18%, quartz 32%, clay 41%, and calcite 16%. The Young’s modulus value is 37.1 GPa, and the Poisson’s ratio is 24.8%, categorizing it as Type 2. In the interval 10,803–10,880 ft, kerogen volumetrics are 19.6%, quartz 41%, clay 31%, and calcite 11%. The Young’s modulus value is 43.3 GPa, and the Poisson’s ratio is 26.6%, categorizing it as Type 3. The data reveals that Type 3 rocks are more suitable for hydraulic fracturing compared to Type 1. Meanwhile, Type 2 rocks are identified as being suitable for placing horizontal wells due to the clay and calcite matrix, which can prevent formation collapse. It can be concluded that integrating geological and rock physics data can yield a more efficient and innovative fracturing design, resulting in a production increase of up to 129% compared to previous production levels.
Identification of Recent Ripple in Opak River Estuary, Kretek Subdistrict, Bantul Regency, Yogyakarta Special Region Gunawan, Indra; Damayanti, Nabila Zafira; Astuti, Ella Dwi; Febrianti, Yeni; Rachmatullah P.P., Tegar Bagaskoro; Hutabarat, Ari Napas
Jurnal Ilmiah Geologi PANGEA Vol. 11 No. 2 (2024): Jurnal Ilmiah Geologi Pangea
Publisher : PROGRAM STUDI TEKNIK GEOLOGI FAKULTAS TEKNOLOGI MINERAL UPN VETERAN YOGYAKARTA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/jigp.v11i2.14006

Abstract

Ripple can be formed from various factors, namely wind, waves, currents, and tidal influences. The research area is located at the mouth of the Opak River, Kretek District, Bantul Regency, Yogyakarta Special Region with coordinates X: 421331 and Y: 9114347. This study aims to determine the factors that affect the formation of ripple and the dominance of factors that affect ripple at the mouth of the Opak River based on the calculation of the ripple index parameter. This research begins with a literature study to find strong theoretical basis. The data collected include wavelength (L), lee side length (LL), stoss side length (LS), maximum wavelength (Lmax), minimum wavelength (Lmin), mean wavelength (L), height (H), curved crestline length (CC), and deviation from straight line (d) and azimuth used to determine the general direction of the ripple. Then the calculation is carried out to obtain each ripple index parameter in the form of RI (Ripple index), PI1 (Parallelism Index 1), PI2 (Parallelism Index 2), SI (Straightness Index), RSI (Ripple Symmetrical Index), CI (Continuity Index) values. Based on data calculations, the results of the Ripple Index range from 0-20, Ripple symmetrical index ranges from 1-4. Parallelism index 1 ranges from 0-3, Parallelism index 2 ranges from 0-1, Straightness index ranges from 0-1.6. From the results of these calculations, it can be concluded that the ripple is affected by sea waves and the current of the Opak River.