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All Journal Petro : Jurnal Ilmiah Teknik Perminyakan Scientific Contributions Oil and Gas
Rahajeng Suryo Rahmadhini
UPN Veteran Yogyakarta
Chemical Engineering, Chemistry & Bioengineering Earth & Planetary Sciences Economics, Econometrics & Finance Energy Engineering

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OPTIMIZATION OF HYDRAULIC FRACTURING DESIGN “KL-01” WELL “KALA” FIELD Karina Larasati; Dimas Suryo Wicaksono; Rahajeng Suryo Rahmadhini; Ristiyan Ragil Putradianto; Achmad Helmi
Petro : Jurnal Ilmiah Teknik Perminyakan Vol. 15 No. 2 (2026): Juni 2026
Publisher : Jurusan Teknik Perminyakan Fakultas Teknologi Kebumian dan Energi Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25105/petro.v15i2.26013

Abstract

Well KL-01 in KALA Field was hydraulically fractured to increase the productivity of a well in a low permeability reservoir. The first treatment exhibited a large increase in production potential; nevertheless, the resulting fracture geometry was not totally ideal, due to the poor proppant placement and unequal distribution of fracture conductivity along the fracture. The study is aimed to analyze the fracture geometry, proppant distribution, fracture conductivity and production performance to assess the original hydraulic fracturing treatment and to identify an optimum redesign scenario. The study employed well log interpretation, reservoir characteristics, production data, step rate test, micro frac test, treatment program and post-job report. A pseudo-three-dimensional hydraulic fracturing model was used to predict fracture propagation, propped fracture length, fracture breadth, proppant placement, retained permeability, fracture conductivity, and dimensionless fracture conductivity. The base case model was validated with field test data and post job report. Sensitivity analysis of injection rate, proppant type, proppant size, pad volume and maximum proppant concentration was conducted afterwards. The first treatment enhanced the ratio of the productivity index by 3.42 and increased the output potential from 82.14 BLPD (3.94 BOPD) to 2061.78 BLPD (98.97 BOPD). For Well KL-01 with reservoir permeability of 4 mD, the best redesign was reached using low density ceramic proppant Carbolite 16/20 and increasing pad volume from 10,500 gallons to 18,000 gallons. The new scenario shows an increase in fracture conductivity from 4245.81 mD-ft to 7587.06 mD-ft and retained permeability rose from 250,984 mD to 551,786 mD. Thus, the enhanced hydraulic fracturing design leads to a better fracture geometry, more uniform proppant distribution, higher fracture conductivity and better production potential.
Integrated Logging, Production, and Geological Analysis for Bypassed Oil Identification in CNA Field, Central Sumatra Basin Karina Larasati; Dimas Suryo Wicaksono; Dedi Kristanto; Hariyadi; Rahajeng Suryo Rahmadhini; Carin Nova Azzaria
Scientific Contributions Oil and Gas Vol 49 No 2 (2026)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/scog.v49i2.2099

Abstract

The Central Sumatra Basin’s CNA Field has been producing hydrocarbons since 1974 and is now considered a mature oil field. The field contains six Long Term Closed (LTC) wells and two Plug and Abandonment wells, providing an opportunity to enhance hydrocarbon recovery by identifying and reactivating residual productive zones. The study is based on two LTC wells, CNA-01 and CNA-03, which are suspected to contain bypassed oil potential. Integrated evaluation of wireline logging data, production history, and geological correlation was performed to identify prospective bypassed oil zones. As a first step in the analysis, resistivity and permeability cut-off values were determined, followed by qualitative log interpretation to identify hydrocarbon-bearing intervals. The identified zones were then confirmed using production test data, structural correlation, and historical production performance. Moreover, Chan’s Diagnostic Plot was used to analyze the water production behavior and to identify the dominant water influx mechanism. Results indicated a total of nine potential bypassed oil intervals, with five intervals identified in well CNA-01 and four intervals identified in well CNA-03, within the BKA and BKB sand units. The main factors affecting bypassed oil are reservoir heterogeneity, variation in vertical permeability, channeling and discontinuous sand distribution. The integrated analysis suggests several workover strategies, including additional perforation in uncompleted hydrocarbon-bearing zones, reducing intervals affected by excessive water production, and squeeze cementing to isolate non-productive intervals. The results presented here demonstrate the value of integrated reservoir evaluation in identifying remaining hydrocarbon potential and aiding mature field redevelopment.
Co-Authors Achmad Helmi Carin Nova Azzaria Dedi Kristanto Dimas Suryo Wicaksono Hariyadi Karina Larasati Ristiyan Ragil Putradianto