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Rachmat Sudibjo

Universitas Trisakti

Author-ID : 3649370

Energy

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The Effect of Resin Injection on the Productivity of Shallow Sandstone Layer in Mawar Field Catur Sunawan Balya; Muhammad Taufiq Fathaddin; Rachmat Sudibjo
Journal of Earth Energy Science, Engineering, and Technology Vol. 2 No. 2 (2019): JEESET VOL. 2 NO. 2 2019
Publisher : Penerbitan Universitas Trisakti

Mawar Field is located in North Kalimantan Province. The field has an unconsolidated sandstone layer which is located in Tarakan formation. Porosity of the layer is more than 20%, while permeability of that is between 100 mD and 1000 mD. The zone which is poorly cemented is a source of sand problem. This sand production has an effect on the stability of oil and gas production. Sand production results in the formation of channeling around cement bonding. Sand production problem can be reduced. To overcome the acidity of the shallow formation, it can be done in two ways, that is Gravel pack using propan and stimulation using resin where the sand will be retained behind the formation. In research that has been done using core data and produced sand samples where the results obtained information about the characteristics of sand in shallow zones so that the appropriate treatment method can be recommended that is stimulation with resin. In the use of this resin there will be a permeability reduction of 15% -27% and a maximum fow rate reduction of 20%.

Simulation Model Application to Predict the Effect of Salinity on Surfactant Adsorption and Retention in Alkali Surfactant Flooding Muhammad Taufiq Fathaddin; Rachmat Sudibjo; Kartika Fajarwati H.; Shabrina Sri Riswati
Journal of Earth Energy Science, Engineering, and Technology Vol. 2 No. 2 (2019): JEESET VOL. 2 NO. 2 2019
Publisher : Penerbitan Universitas Trisakti

Modeling works of alkali surfactant injection are presented in this paper, in order to analysis the effect of salinity on surfactant adsorption and retention. Simulation model was built using UTCHEM simulator. The simulation model was validated using laboratory experiment. From the laboratory experiment and modeling, it was found that surfactant retention, as well as surfactant adsorption, increased with the salinity. However they were not linearly related. The application of microemulsion Type III (salinity of 1.4% wt.) gave the optimum flooding. Although more surfactant was adsorbed and retained compared to microemulsion Type I (salinity of 1.4% wt.), but it yielded the highest recovery factor. The formation of microemulsion Type II (salinity of 2.0% wt.) should be avoided since it effectively caused surfactant loss due to surfactant adsorption and retention.

Production Allocation on Commingled Two Layer Well Using Fingerprint Method Fahrudin Zuhri; Rachmat Sudibjo; R. S. Trijana Kartoatmodjo
Journal of Earth Energy Science, Engineering, and Technology Vol. 1 No. 3 (2018): JEESET-VOL.1-NO.3-2018
Publisher : Penerbitan Universitas Trisakti

Production proportion ratio study of commingled well two layers reservoir has been developed by geochemistry approaching, with oil reservoir fingerpint methode by using Gas Chromatography then processed by Chemstation software. The study is developed to solve the commingled well production alocation problem in oil field. There are 4 oil samples will be analyzed to represent each layer and commingle production oil sample in 2009 and 2015.Result of study, figures out that oil fingerprint from commingle production has a difference as long as production time. Oil sample that taken from different commingle production time is predicted to produce a different ratio contribution form each layer of reservoir. Every layer reservoir has a different contribution from 2009 to 2015. Result of production proportion ratio study can be applied to decisionmaking of reservoir developement in an oil field, especially for well completion and enhanced oil recovery. This methode is proven to be a solution of commingle production problem of two layers reservoir. Fingerprint methode to determine production proportion ratio of commingled well production is the first in Indonesia.

Peramalan Kinerja Lapangan SNP Dengan Injeksi Air Menggunakan Metode Material Balance Andre Albert Sahetapy Engel; Rachmat Sudibjo; Muhammad Taufiq Fathaddin
Journal of Earth Energy Science, Engineering, and Technology Vol. 1 No. 3 (2018): JEESET-VOL.1-NO.3-2018
Publisher : Penerbitan Universitas Trisakti

The decline in production from of a field is the common problem in the oil and gas industry. One of the causes of the decrease in production is the decline of reservoir pressure. Based on the analisis result, it was found that SNP field had a weak water drive. The most dominant drive of the field was fluid expansion. In order to reduce the problem, a reservoir pressure maintenance effort was required by injecting water. In this research, the effect of water injection to reservoir pressure and cumulative production was analyzed. From the evaluation result, it was found that the existing inejection performance using one injection well to Zones A and B was not optimum. Because, the recovery factor was predicted to 29.11% only.By activating the four injection wells, the recoverty factor could be increase to 31.43%.

Economic Evaluation of Y Gas Field Development Using Reservoir Simulator Anita Theresa Panjaitan; Rachmat Sudibjo; Sri Fenny
Journal of Earth Energy Science, Engineering, and Technology Vol. 1 No. 3 (2018): JEESET-VOL.1-NO.3-2018
Publisher : Penerbitan Universitas Trisakti

Y Field which located around 28 km south east of Jakarta was discovered in 1989. Three wells have been drilled and suspended. The initial gas ini place (IGIP) of the field is 40.53 BSCF. The field will be developed in 2011. In this study, reservoir simulation model was made to predict the optimum development strategy of the field. This model consisted of 1,575,064 grid cells which were built in a black oil simulator. Two field development scenarios were defined with and without compressor. Simulation results show that the Recovery Factor at thel end of the contract is 61.40% and 62.14% respectively for Scenarios I and II without compressor. When compressor is applied then Recovey Factor of Scenarios I and II is 68.78% and 74.58%, correspondingly. Based on the economic parameters, Scenario II with compressor is the most attractive case, where IRR, POT, and NPV of the scenario are 41%, 2.9 years, and 14,808 MUS$.

Co-Authors Andre Albert Sahetapy Engel Anita Theresa Panjaitan Catur Sunawan Balya Fahrudin Zuhri Kartika Fajarwati H. Muhammad Taufiq Fathaddin, Muhammad Taufiq R. S. Trijana Kartoatmodjo Shabrina Sri Riswati Sri Fenny

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