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All Journal Seminar Nasional Aplikasi Teknologi Informasi (SNATI) Jurnal Pengabdian Kepada Masyarakat Universitas Bangka Belitung Jurnal Ekonomi Islam Pendas : Jurnah Ilmiah Pendidikan Dasar Social, Humanities, and Educational Studies (SHEs): Conference Series Jurnal Kejaora (Kesehatan Jasmani dan Olahraga) Cendekiawan Jurnal Riset Teknologi Industri SPRINTER: Jurnal Ilmu Olahraga Jurnal Ilmiah Wahana Pendidikan Jurnal Ilmiah Berkala: Sains dan Terapan Kimia Petro : Jurnal Ilmiah Teknik Perminyakan Journal of Earth Energy Science, Engineering, and Technology Populer: Jurnal Penelitian Mahasiswa JURNAL MUARA PENDIDIKAN Amorti: Jurnal Studi Islam Interdisipliner Jurnal Masyarakat Madani Indonesia Jurnal Pembelajaran Bahasa dan Sastra International Journal of Education, Vocational and Social Science Scientific Contribution Oil and Gas
Dedy Irawan
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Religion Agriculture, Biological Sciences & Forestry Humanities Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Mathematics Mechanical Engineering Physics Public Health Social Sciences Other

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Trap Prevention in Machine Learning in Prediction of Petrophysical Parameters: A Case Study in The Field X Adam Putra Pratama Zainuri; Pahala Dominicus Sinurat; Dedy Irawan; Hari Sasongko
Scientific Contributions Oil and Gas Vol. 46 No. 3 (2023): SCOG
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/scog.46.3.328

Abstract

Petrophysical parameters such as porosity and water saturation are vital in the petroleum industry for reservoir characterization. These aspects are typically assessed through laboratorium measurements of core samples or intricate petrophysical calculations. Machine Learning (ML) offers a cost-effective and efficient approach as an alternative to conventional methods of predicting those parameters. However, developing ML models can be prone to the invisible traps such as overfitting, underfitting, feature selection, and feature importance. This study is intended to share how to identify the traps and its mitigation by establishing a synergistic workflow between ML and petrophysical theory. A model was developed based on data from several wells in X field, where they are randomized and split into test and train data. Well-log normalization preceded data splitting, and input features were normalized with outlier removal. A feature selection function was then employed to choose a specific amount of log data. Finally, the model selection function identified the highest-scoring model. Without a proper workflow, overfitting, irrelevant feature selection, and imprecise ranking issues emerged. However, with the proper workflow, these invisible traps were mitigated, even with a relatively small dataset. The final model could accurately predict porosity and water saturation
A Case Study of Primary and Secondary Porosity Effect for Permeability Value in Carbonate Reservoir using Differential Effective Medium and Adaptive Neuro-Fuzzy Inference System Method Reza Wardhana; Amega Yasutra; Dedy Irawan; Mochammad Wahdanadi Haidar
Scientific Contributions Oil and Gas Vol. 45 No. 1 (2022): SCOG
Publisher : Testing Center for Oil and Gas LEMIGAS

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Abstract

Pore system in a carbonate reservoir is very complex compared to the pore system in clastic rocks. According to measurements of the velocity propagation of sonic waves in rocks, there are three types of carbonate pore classifi cations: Interpartikel, Vugs and Crack. Due to the complexity of various pore types, errors in reservoir calculation or interpretation might occur. It was making the characterization of the carbonate reservoir more challenging. Differential Effective Medium (DEM) is an elastic modulus modeling method that considers the heterogeneity of pores in the carbonate reservoir. This method adds pore-type inclusions gradually into the host material to the desired proportion of the material. In this research, elastic modulus modeling will be carried out by taking into account the pore complexity of the carbonate reservoir. ANFIS algorithm will also be used in this study to predict the permeability value of the reservoir. Data from well logging measurements will be used as the input, and core data from laboratory will be used as train data to validate prediction results of permeability values in the well depths domain. So, permeability value and pore type variations in the well depth domain will be obtained.
Prediction of Hydraulic Fractured Well Performance Using Empirical Correlation and Machine Learning Kamal Hamzah; Amega Yasutra; Dedy Irawan
Scientific Contributions Oil and Gas Vol. 44 No. 2 (2021): SCOG
Publisher : Testing Center for Oil and Gas LEMIGAS

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Abstract

Hydraulic fracturing has been established as one of production enhancement methods in the petroleum industry. This method is proven to increase productivity and reserves in low permeability reservoirs, while in medium permeability, it accelerates production without affecting well reserves. However, production result looks scattered and appears to have no direct correlation to individual parameters. It also tend to have a decreasing trend, hence the success ratio needs to be increased. Hydraulic fracturing in the South Sumatra area has been implemented since 2002 and there is plenty of data that can be analyzed to resolve the relationship between actual production with reservoir parameters and fracturing treatment. Empirical correlation approach and machine learning (ML) methods are both used to evaluate this relationship. Concept of Darcy's equation is utilized as basis for the empirical correlation on the actual data. The ML method is then applied to provide better predictions both for production rate and water cut. This method has also been developed to solve data limitations so that the prediction method can be used for all wells. Empirical correlation can gives an R2 of 0.67, while ML can gives a better R2 that is close to 0.80. Furthermore, this prediction method can be used for well candidate selection means.
Upaya Meningkatkan Keterampilan Membaca Pemahaman Melalui Pendekatan Proses Pada Siswa Kelas IV Sekolah Dasar Dedy Irawan; Kiromin Baroroh Zein
Social, Humanities, and Educational Studies (SHES): Conference Series Vol 7, No 3 (2024): Social, Humanities, and Educational Studies (SHEs): Conference Series
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/shes.v7i3.92644

Abstract

Membaca pemahaman adalah keterampilan membaca yang berada pada tingkat lebih tinggi, mengharuskan pembaca untuk membaca dengan pemahaman dan berpikir secara kognitif. Tujuan dari penelitian ini adalah untuk mengetahui peningkatan keterampilan membaca pemahaman melalui pendekatan proses pada siswa kelas IV Sekolah Dasar. Penelitian ini menggunakan metode penelitian tindakan kelas (classroom action research) yang dilaksanakan dalam dua siklus, dengan masing-masing siklus terdiri dari dua pertemuan. Hasil penelitian menunjukkan bahwa penerapan pendekatan proses efektif dalam meningkatkan keterampilan membaca pemahaman siswa di kelas IV Sekolah Dasar, terbukti dari peningkatan rata-rata prestasi belajar siswa, yaitu 68.18% pada siklus I dan 86.36% pada siklus II. Kesimpulannya, pendekatan proses dapat meningkatkan keterampilan membaca pemahaman siswa di kelas IV Sekolah Dasar.
Hubungan Indeks Massa Tubuh dengan Kapasitas Paru Maksimal Pemain Sepak Bola Persija FC M. Bagus Teguh Tabrani; Rubbi Kurniawan; Hari Pamungkas; Dedy Irawan; Agusti Mardikaningsih
SPRINTER: Jurnal Ilmu Olahraga Vol. 5 No. 2 (2024): SPRINTER: Jurnal Ilmu Olahraga
Publisher : MAN Insan Cendekia Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46838/spr.v5i2.596

Abstract

Pemain sepak bola umumnya memiliki Indeks Massa Tubuh (IMT) yang rendah hingga normal karena kebutuhan untuk menjaga kecepatan dan mobilitas yang optimal. Obesitas diartikan sebagai berat badan berlebih akibat dari penumpukan lemak yang dapat beresiko bagi kesehatan seseorang. Kapasitas paru maksimal atau VO2maks adalah volume maksimum oksigen yang dikonsumsi dalam satu menit selama latihan maksimal. Pengukuran VO2maks berguna untuk menganalisis status kebugaran seseorang dengan mempertimbangkan resiko kardiovaskular, sehingga subjek dapat mengetahui status VO2maks. Penelitian ini bertujuan untuk mengetahui korelasi atau hubungan IMT (Indeks Massa Tubuh) dengan kapasitas paru maksimal pemain Persija FC. Penentuan pengambilan sampel yang peneliti gunakan adalah dengan teknik total sampling, jadi seluruh 16 pemain Persija menjadi sampel. Prosedur tes yang dilakukan adalah tes antropometri dan Multistage Fitness Test (MFT). Hasil analisis data yang diperoleh mempunyai signifikansi <0,05, yang artinya data berkolerasi sig=0,002. Nilai Pearson Correlation menjelaskan bahwa, ada korelasi kuat antara dua variabel indeks massa tubuh dengan VO2maks (nilai Pearson Correlation= -,713). Kesimpulan dari penelitian ini, terdapat korelasi antara Indeks Massa Tubuh (IMT) dengan kapasitas paru maksimal pada pemain. Semakin besar indeks massa tubuh, berakibat gangguan fungsional kardioresprasi terutama pada kemampuan paru maksimal.
The case of character education implementation in elementary schools: How are promotions and its problems? Dedy Irawan; Yuli Windarti
International Journal of Education, Vocational and Social Science Vol. 2 No. 01 (2023): Februari, International Journal of Education, Vocational and Social Science (I
Publisher : Cita konsultindo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.63922/ijevss.v2i01.147

Abstract

Nowadays, the attitude and behaviour of Indonesian students are declining. As a character-building component, schools have an important task in instilling morals, ethical values, noble morals, and strong and resilient character. This study was conducted to analyse the implementation of character education at SD Negeri 2 Pengadegan. Qualitative research with an ethnographic approach was used in this study on implementing character education in elementary schools during one semester of 2021/2022. A total of 20 participants were interviewed, including principals, teachers, parents and students. Observation, interviews and documentation were used as research instruments. Character education promotion implemented at SD Negeri 2 Pengadegan covers 20 aspects. This research describes the character education strategies: exemplary habituation, school climate conditioning, integration in all subjects, and integration through extracurricular activities. Good cooperation from all school members is a supporting factor for character education at SD Negeri 2 Pengadegan. However, character education is hampered by the lack of parental concern at home and the negative response of some parents to the enforcement of school regulations. To overcome this, schools should improve communication with parents.
KONTRIBUSI PERSENTASE LEMAK TUBUH TERHADAP INDEKS MASSA TUBUH PADA PERFORMA PEMAIN KLUB AREMA FC Muhammad Rafli; Havid Yusuf; Hari Pamungkas; Yulianto Dwi Saputro; Dedy Irawan
Jurnal Kesehatan Jasmani dan Olahraga (KEJAORA) Vol 8 No 2 (2023): Jurnal Kejaora (Kesehatan Jasmani dan Olah Raga)
Publisher : Prodi Pendidikan Jasmani Kesehatan dan Rekreasi, Universitas PGRI Banyuwangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36526/kejaora.v8i2.3021

Abstract

Indeks massa tubuh merupakan unsur kebugaran jasmani yang dihitung melalui tes antropometri, antara tinggi badan dengan berat badan. Berat badan seseorang dipengaruhi oleh lemak yang ada di dalam tubuhnya. Tidak heran, jika ada seorang pemain sepakbola yang mengalami obesitas akan kesulitan untuk melakukan gerakan yang lincah, atraktif dan eksplosif. Ini akan berdampak pada performa atlet, terlebih juga performa tim. Tujuan dari penelitian ini melihat kontribusi persentase lemak tubuh terhadap indeks massa tubuh pada pemain Arema FC. Sampel yang digunakan adalah seluruh pemain Arema FC yang berjumlah 25 orang. Instrumen penelitian pada tes kebugaran jasmani olahraga adalah sebagai berikut: 1) IMT (Indeks Massa Tubuh) dengan cara mengukur tinggi badan dan berat badan kemudian dicatat. Selanjutnya keduanya dihitung sesuai rumus yang ditentukan. 2) Persentase lemak tubuh menggunakan alat untuk mengukur komposisi tubuh, yaitu Seca mBCA 514 Medical Body Composition Analyzer. Hasil data menyatakan terdapat korelasi antara persentase lemak tubuh dengan indeks massa tubuh, yaitu dengan nilai korelasi sebesar 0,98. Artinya, signifikansi diantara keduanya sangat kuat. Hasil data menyatakan bahwa rata-rata persentase lemak tubuh pemain Arema FC normal dengan kisaran 18,8%. Sedangkan rata-rata indeks massa tubuh dari pemain Arema FC adalah dalam kategori normal dengan kisaran 23 kg/m2. Kesimpulannya adalah para pemain Arema FC memiliki kondisi lemak tubuh yang normal sehingga indeks massa tubuh mengikuti dalam keadaan normal.
Penerapan Metode Latihan E-Movement terhadap Hasil Speed Atlet Sepak Bola Club Deltras FC 1989 Muhammad Fitrah Abi Nursafatullah; Dedy Irawan; Ahmad Ilham Habibi; Yulianto Dwi Saputra; Reza Aofal
Jurnal Kesehatan Jasmani dan Olahraga (KEJAORA) Vol 9 No 2 (2024): Jurnal Kejaora (Kesehatan Jasmani dan Olah Raga)
Publisher : Prodi Pendidikan Jasmani Kesehatan dan Rekreasi, Universitas PGRI Banyuwangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36526/kejaora.v9i2.4178

Abstract

Berdasarkan latar belakang masalah speed merupakan salah satu faktor kelemahan atlet klub sepak bola Deltras FC 1989 ketika bertanding melawan tim dengan gaya permainan sepak bola dengan intensitas cepat. Tujuan penelitian ini untuk mengetahui penerapan metode latihan e-movement terhadap hasil speed atlet sepak bola club Deltras FC 1989. Populasi penelitian ini yaitu 20 atlet sepak bola pada club Deltras FC 1989. Teknik pengambilan sampel yang digunakan menggunakan total sampling, yang dimana sampel yang digunakan adalah keseluruhan dari jumlah populasi. Sehingga sampel yang digunakan yaitu 20 atlet sepak bola pada club Deltras FC 1989. Instrumen dalam mengukur speed menggunakan tes sprint jarak 30 meter untuk atlet sepak bola klub Deltras FC 1989. Teknik analisis data menggunakan uji normalitas dengan nilai sig. > 0,05 dan uji hipotesis menggunakan uji independent sample t test untuk mengetahui perbedaan pengaruh pada tes awal dan tes akhir. Hasil data berdasarkan hasil penelitian diperoleh hasil yang menunjukkan bahwa terdapat penerapan yang signifikan antara metode latihan e- movement terhadap hasil speed atlet sepak bola dengan nilai sig. < 0,05. Dalam peningkatan speed pada atlet sepak bola dapat menggunakan program latihan dengan metode e-movement dengan optimal.
Analisis Kesulitan Membaca Permulaan Siswa Kelas II Sekolah Dasar Aldinna Shoffiya Rahmaddanti; Dedy Irawan
Populer: Jurnal Penelitian Mahasiswa Vol. 2 No. 3 (2023): September : Jurnal Penelitian Mahasiswa
Publisher : Universitas Maritim AMNI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58192/populer.v2i3.1180

Abstract

The most common learning difficulties faced by Primary school students are difficulties in learning to read. In second-grade students of SD Negeri 4 Dukuhwaluh, this problem was also found, so this study aims to describe students' initial reading difficulties. This research used a descriptive qualitative research method of a case study. The subjects of this study included 9 students who had difficulty in reading, class teachers, and 9 students' parents. Observation, interviews, and document analysis were used to collect data. The validity test of the data used data and technique triangulations. Data analysis techniques used the Miles Huberman model; data collection, data reduction, data presentation, and drawing conclusions. Reading difficulties for second-grade students of SD Negeri 4 Dukuhwaluh were experienced by 9 students. The results showed that initial reading difficulties included the following: a) difficulty in recognizing letters, there were 2 students who did not recognize letters from A to Z. b) difficulty in reading diphthongs, there were 4 students who did not want to pronounce any letters or stuttered when reading diphthongs. c) difficulty in reading words, there were 4 students who were not fluent in reading words or were still spelling. d) not proficient in reading consonants, there were 2 students who only knew a few consonants, and e) not yet fluent in reading sentences, there were 9 students who were still not fluent in reading sentences. It can be concluded that the difficulties experienced by the 9 students were various.
Integration of Empirical Methods for Accurate Water Saturation Calculation in Low Resistivity Reservoir Citrowati, Sekar Ayu; Dedy Irawan; Pahala Dominicus Sinurat
Journal of Earth Energy Science, Engineering, and Technology Vol. 7 No. 3 (2024): JEESET VOL. 7 NO. 3 2024
Publisher : Penerbitan Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25105/6qfar389

Abstract

The Indonesian oil and gas industry faces significant challenges in exploring low-resistivity reservoirs, such as the Talang Akar Formation in South Sumatra, the Tanjung Formation in East Kalimantan, and the Gumai Formation in South Sumatra and West Java. These reservoirs often contain clay, clayey sand, and conductive minerals, which complicate geophysical log interpretation, leading to missed hydrocarbon potential. Common methods such as Archie’s Law are often used to calculate water saturation but tend to be inaccurate in formations with high conductivity due to clay content. The Simandoux method attempts to address this limitation by considering the conductivity of clay, but the assumption of homogeneous clay distribution often does not match actual conditions. This study proposes a modification to the Simandoux method by accounting for the non-linear behavior of clay conductivity and formation-specific parameters derived from core analysis. This approach integrates multi-parameter log data and advanced petrophysical models to address mineralogical heterogeneity and clay distribution. The results show that the modified Simandoux method provides more accurate water saturation estimates in low-resistivity zones. Validation with core and production data demonstrates the improved reliability of this model, supporting optimal field development and hydrocarbon exploration in Indonesia.
Co-Authors Adam Putra Pratama Zainuri Adrian Tjahjana Agusti Mardikaningsih AHMAD ILHAM HABIBI Aldinna Shoffiya Rahmaddanti Alfian Eko Rochmawan Amega Yasutra Anindia, Zakia Nada Aprizon Arif Usman Atikah Mumpuni Babas Samudera Hafwandi Citrowati, Sekar Ayu Dhi Bramasta Edi Susanto Eka Mahargiani Rokhma Eka Nur Oktafiani Emma Maulidya Ferdi Ramantiya Fina Yulianingrum Fouad Larhzizer Gintoro * Hari Pamungkas Hari Sasongko Herlin Munthe Ibrahim Hammad Jojor Silalahi Kamal Hamzah Kiromin Baroroh Zein Lalang Dwiyoga Sakti M. Bagus Teguh Tabrani Marinda Rahim Mochammad Wahdanadi Haidar Monica Bella Anggelia Muhammad Fitrah Abi Nursafatullah Muhammad Rafli Nugrahaeni Setyo Utari Pahala Dominicus Sinurat Prameswari, Laura Damai Pratik Hari Yuwono PUTRI WULANDARI Putri, Resta Elvina Reza Aofal Reza Wardhana Riky Supratama Rubbi Kurniawan Sahlan Tampubolon Sinthya Maranatha hr Munthe Siti Qomala Khayati Syam suri William * Yudha Febrianta Yuli Windarti Yulianto Dwi Saputra Yulianto Dwi Saputro Yusuf, Havid Zailani, Ahmad Dava Zainal Arifin