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Perkiraan Laju Penetrasi Pengeboran Sumur Panas Bumi Menggunakan Adaptive NeuroFuzzy Inference System
Get PDFPlan an optimal geothermal well drilling scheme, the identification of suitable drilling parameters must be well known.Several important parameters in a drilling operation include rotary speed (N), weight on bit (WOB), true vertical depth (TVD), foamflowrate (FF), and rate of penetration (ROP). Information regarding these parameters can be obtained from drilling geothermal wells.Drilling parameter correlations are then obtained based on this information. The application of an adaptive neuro-fuzzy inferencesystem (ANFIS) is necessary considering that the relationship between parameters is very complicated and non-linear. On the other hand, the relationship between parameters is not easy to know. In this study, the ANFIS model is developed to propose ROP. Data wasobtained from four wells in a geothermal field in South Sumatra. Three ANFIS models were generated. Each model includes different input parameters. rotational speed (N) and weight on drill bit (WOB) and true vertical depth (TVD) are recommended for estimation of rate of penetration (ROP). Adding the foam flow (FF) input rate parameter can improve the accuracy in three out of four cases. Based on the calculation results of the ANFIS-1, ANFIS-2, and ANFIS-3 models, the average relative absolute deviation (MARE) values were 16.42%, 6.99%, 4.14%, respectively, while the correlation coefficient (R) was respectively - respectively 0.716, 0.909, and 0.93
Evaluasi Penyimpangan Lintasan Pengeboran Berarah Dan Pengaruhnya Terhadap Pembebanan Drill String pada Sumur “A-A” Lapangan "CPG
Get PDFIn drilling activities, wellbores inevitably experience deviation, commonly referred to as a crooked hole. If the deviation is significant, the loading on the drill string becomes one of the reasons why drilling does not go as planned and may even fail. The purpose of the research is to determine whether there is a deviation in the drilling path between the planned trajectory and the actual trajectory in well \u27A-A\u27 in the CPG field. By evaluating the drilling path deviation, it can be determined whether the load experienced by the drill string exceeds the predefined limits.
The Minimum of Curvature method has the advantage of having minimal deviation and inclination, making it accurate with the plan. Therefore, this method is used to calculate the drilling path. Using the parameters of Measured Depth, Inclination, and Azimuth, the method will calculate the Radius Factor, Grid North, Grid East, Vertical Depth, and Vertical Section. The planned and actual data will then be compared to identify any deviation. Drill string load calculations will be performed if a deviation is found using the H. Rabia and Bill Mitchel equations to calculate Weight on Bit, Drag, Tension, Margin of Overpull, Torsion, and Buckling Load.
The deviation results, such as at the Kick Off Point (KOP), show that in the plan, it is located at a depth of 1,378.02 Ft MD and 0.75 Ft Vsec, while in actual practice, it is at a depth of 1,275.65 Ft MD and -0.79 Ft Vsec. In Trajectory #1 for Surface Casing in the plan, it is at a depth of 2,067.03 Ft MD and 89.21 Ft Vsec, while in actual practice, it is at a depth of 1,963.68 Ft MD and 80.42 Ft Vsec. In Trajectory #2, the plan is at a depth of 3,724.52 Ft MD and 402.38 Ft Vsec, while in actual practice, it is at 3,695.72 Ft MD and 385.71 Ft Vsec
Sedimentology and Reservoir Potential of Lower Tanjung Sandstone in Martapura, Barito Basin, South Kalimantan
Get PDFThe Barito Basin in South Kalimantan, Indonesia, is a hydrocarbon-producing basin where the Eocene Tanjung Formation serves as both the primary source rock and reservoir. Despite historical discoveries, recent exploration has faced challenges in identifying high-quality reservoir rocks. This study evaluates the reservoir potential of the Lower Tanjung Formation in the Martapura area using fieldwork and laboratory analyses, focusing on porosity, permeability, and texture and depositional geometry. The formation comprises thick shale with minor sandstone and coal layers, interpreted to be deposited in an estuarine environment. Sandstone layers, 0.2–12 m thick, are limited in lateral extent, forming a narrow "shoestring" geometry. Porosity measurements range from 19.0% to 33.1% (good to very good), with an average of 24%, while permeability varies from 1.5 mD to 105 mD (tight to very good), averaging 29.7 mD. However, primary porosity of the sandstone (3.6–7.2%) is poor, with secondary porosity (3.6–14.8%) dominating, driven by near-surface weathering during uplift. Our study suggests that some sandstone layers exhibit good potential, but the overall reservoir quality is limited due to poor primary porosity and restricted depositional geometry.
 
Hubungan antara Sikap Kepedulian Lingkungan dan Perilaku Pro Lingkungan pada Produser Ikan Pindang di Desa Tanjungsari, Kendal, Jawa Tengah
Get PDFABSTRACT
Fish salting producers are faced with the challenge of managing waste generated from the production process. This production activity, which produces waste, can affect the local environmental conditions. This study aims to empirically prove the relationship between environmental concern attitudes and pro-environmental behaviors among fish salting producers in Tanjungsari Village, Kendal, Central Java. A total of 80 fish salting producers in Tanjungsari Village were sampled using the convenience sampling technique. The results found a Pearson product moment correlation coefficient of 0.456 (p<0.01). This means that there is a positive and very significant relationship between environmental concern attitudes and pro-environmental behaviors.
Keywords: Environmental Concern Attitudes, Pro-Environmental Behaviors, Fish Saltin
Leadership and Knowledge Management in SMEs: Organizational Culture as Moderation
Get PDFKnowledge management is important for small and medium-sized businesses to maintain their competitive position and drive innovation. The main obstacles that hinder the spread of knowledge management practices in SMEs include cultural aspects, leadership, and limited managerial capacity related to technology and knowledge gaps. Therefore, this study analyzed the effect of transformational and transactional leadership on knowledge management in SMEs and the moderating of organizational culture. This research was collected using a questionnaire. The sample of this study was leaders of Small and Medium Industries in Mojowarno District, Jombang, East Java, Indonesia with 62 respondents. The analytical method used a moderation test using the SmartPLS 3 program. The results of the study revealed that transformational leadership had a significant effect on knowledge management while transactional leadership did not have a significant impact on knowledge management; team culture strengthened the influence of transformational and transactional leadership on knowledge management, and there was no moderating role of adhocracy culture and market culture. These findings show that transformational leadership plays a major role in the application of knowledge management in SMEs. However, transformational and transactional leadership collaboration has a major impact on the successful implementation of knowledge management. Clan culture contributes greatly to strengthening the leadership role of knowledge management
Effect of Filter Media Thickness on Reducing Lime Levels in Groundwater
Get PDFWater is a necessity that cannot be separated from the lives of living things. According to the Regulation of the Minister of Health of the Republic of Indonesia, the maximum permissible level of hardness is 500 mg/l. The condition of the clean water in Kedungwaru Village, Sugio District, Lamongan Regency has lime contamination because it is located near limestone mountains, so it needs to be filtered. The purpose of this study was to determine the effect of the thickness of the filtration media of ginger coral and pumice on reducing the levels of lime in groundwater. As well as providing recommendations for filer designs based on experimental data. This research is experimental using a filtration process with ginger coral and pumice media by varying the thickness of the filter. Based on the results of the study, there is an effect of the thickness of the filter media on the decrease in the levels of lime in groundwater. The value of the effectiveness of each filter is a decrease in lime levels. In filter 1, the reduction effectiveness was 31.88%; in filter 2, it was 36.23%; in filter 3, it was 34.78%; in filter 4, it was 39.13%; and in filter 5, it was 26.08%. The most effective result for reducing total hardness is filter 4
OPTIMASI HIDROLIKA LUMPUR PENGEBORAN PADA SUMUR BERARAH “Z” LAPANGAN “L” TRAYEK 12 ¼
Get PDFSistem hidrolika lumpur pemboran mempunyai peran yang sangat penting dalam opersi pemboran. Perencanaan dan pengontrolan yang baik dapat mempercepat operasi pemboran dan secara keseluruhan dapat menghemat biaya selama operasi pemboran. Peranan utama dalam sistem hidrolika lumpur pemboran yaitu untuk membersihkan lubang bor dengan mengangkat serbuk bor (cutting) sampai permukaan melalui annulus. Jika serbuk bor (cutting) yang mengendap tidak segera diangkat dapat menyebabkan beberapa masalah pemboran antara lain penggerusan serbuk bor berulang kali oleh pahat (regriding), tersangkutnya serbuk bor di sela-sela gigi pahat (bit balling), bahkan bisa memnyebabkan pipa terjepit (pipe sticking), dan juga hidrolika pahat yang tidak optimum dapat menjadi salah satu penyebab turunnya laju penembusan (ROP). Metode yang digunakan pada sumur “A” lapangan “M” yaitu menggunakan metode BHI (Bit Hydraulic Impact) dikarenakan sumur berarah. Prinsip dasar pada metode ini, menganggap bahwa semakin besar tumbukannya (tumbukan sesaat) yang diterima batuan formasu dari lumpur yang dipancarkan dari bit, maka semakin besar pula efek pembersihannya, sehingga metode ini berusaha untuk mengoptimalkan impact pada bit. Evaluasi perhitungan hidrolika pada pahat yaitu Hal pertama yang dianalisa adalah BHI/HP pada optimasi hidrolika pada bit agar kita tahu apakah nilainya sudah optimal atau belum, nilai BHI/HPs optimum jika BHI/HPs > 48% kemudian menghitung nilai Ca yang optimum jika Ca < 5%, Ft yang optimum jika Ft ≥ 90% dan PBI yang optimum jika PBI ≥ 1.Kata Kunci: Hidrolika Pemboran, BHI, Pengangkatan Cutting
Prototype of a Dust Monitoring Device in the Mechanical Engineering Laboratory at PGRI University Semarang Using the GP2Y1010AU0F Sensor
Get PDFABSTRACT
This study aims to develop an accurate and real-time air quality monitoring system in the Mechanical Engineering Laboratory that provides information on the measured parameter values. The research employs an experimental approach to determine the effectiveness of variables within the experiment. The primary sensor used is the GP2Y1010AU0F Optical Dust Sensor, which operates based on infrared light to measure particulate dust concentration levels. Analysis of sensor testing results was conducted by observing variations in sensor readings, notably after trials involving tissue burnt as a dust source. The dust sensor consistently recorded an average dust concentration of 0.597 Kg/m³. Subsequently, tests were conducted using baby powder with a constant weight of 30 mg per trial. Sensor readings varied between 0.35 Kg/m³ and 0.38 Kg/m³, indicating that within the given weight range, the powder mass does not significantly impact sensor readings. Further, tests on indoor dust density, with an average concentration of 36.01 µg/m³, revealed a relatively low average dust concentration in the room during the measurement period.
Successfully Metode Workover : Re-Entry Dan Re-Evaluate Sumur Vertikal X-1 Dengan Sidetrack Dan Drilling Horizontal Pada Lapisan Top Reservoir
Get PDFThe existing well X-1 is an old vertical well that has been producing oil for many years.Water Oil Contact interval increases until it reaches the perforation depth interval as long as production oil from well is taken . This causes water coning problems to arise, causing the water cut value in this well to reach 30%. To overcome this problem, the X-1 well was closed and a workover operation was carried out with sidetrack to look for the sweet spot oil zone by evaluating the formation of the pilot hole well using a wireline log and wireline formation tester. After the sweet spot oil zone is found, horizontal drilling is carried out in the sweet spot oil zone to create the Maximize Reservoir Contact well. This workover operation was carried out in order to find zones that contain almost 100% oil, as well as reduce water production. Economic calculations were carried out to analyze the success of the pilot hole and MRC well sidetrack workover project. The research methods used to evaluate pilot hole well formations are qualitative and quantitative using the modification archie equation for carbonate reservoir on a wireline log and validated with a wireline formation tester, as well as the method for calculating the feasibility of a workover project using the Indonesian version of PSC cost recovery economics. The results obtained are that the sweet spot oil zone is at a depth of XYY7 ft with water saturation values 0.269635 on the wireline log and 0.000122 on the wireline formation tester and oil saturation values respectively are 0.730365 and 0.999878. Based on economic analysis using the Indonesian version of the PSC cost recovery method, it can be concluded that this project is feasible to operate with positive NPV results of $2579.57 MUSD, IRR value of 142% and POT of 1.46 months.
Key Words : formation evaluation, wireline log, wireline formation tester, pilot hole well, MRC Well, sweet spot oil zone, water coning, PSC cost recovery
Penentuan Design Hydraulic Fracturing Dan Analisa Produktivitas Sumur Qwe Pada Lapangan DSA
Get PDFSumur QWE terletak di Lapangan DSA berada di Cekungan Jawa Barat. Sumur QWE adalah sumur lama yang akan dibuka kembali pada lapisan batupasir bertujuan untuk meningkatkan laju produksi sumur yang dilakukan program hydraulic fracturing karena adanya formation damage pada interval 2843 – 2848 m. Evaluasi keberhasilan kegiatan hydraulic fracturing dibutuhkan untuk mengetahui keberhasilan kegiatan tersebut. Data yang digunakan meliputi data sumur, data reservoir, data produksi, dan Post Job Report. Data yang telah terkumpul akan dihitung secara manual menggunakan microsoft excel, geometri rekahan dibuat menggunakan simulator menggunakan data tekanan yang didapat ketika kegiatan hydraulic fracturing. Hasil yang telah didapat dari dibandingkan sebelum dan sesudah dilakukan hydraulic fracturing. Pemodelan geometri rekahan menggunakan model PKN 2D. Hasil dari model geometri rekahan digunakan untuk menghitung FCD dan permeabilitas rata-rata menggunakan metode Howard&Fast. Hasil dari evaluasi kegiatan hydraulic fracturing mendapatkan nilai permeabilitas sebelum dan sesudah dilakukannya hydraulic fracturing terdapat kenaikan dari 12 mD menjadi 44,437 mD, dimana mengalami kenaikan sebesar 32,437%, Productivity Index menunjukkan peningkatan produktivitas sumur sebesar 2,868 kali