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All Journal Jurnal Mineral, Energi dan Lingkungan Jurnal Mineral, Energi dan Lingkungan Scientific Contributions Oil and Gas
Ratna Widyaningsih
Universitas Pembangunan Nasional "Veteran" Yogyakarta
Chemical Engineering, Chemistry & Bioengineering Earth & Planetary Sciences Energy Engineering Environmental Science

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Analisis Faktor Erodibilitas Tanah Penyebab Erosi di Area Tambang Batubara Site Melak Arisdiansyah Putra; Ratna Widyaningsih; Mohammad Nurcholis
Jurnal Mineral, Energi dan Lingkungan Vol 3, No 1 (2019): Juni
Publisher : Fakultas Teknologi Mineral, Universitas Pembangunan Nasional (UPN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (20.098 KB) | DOI: 10.31315/jmel.v3i1.2896

Abstract

Open-pit coal mining as done by the coal mining site Melak have a impact on the surrounding natural environment. The impact of mining operations is that the land becomes unproductive and erosion is very high because of loosing its vegetation on ex-mining land. Vegetation influence the sensitivity of the soil to withstand destruction and transportation by rain and surface runoff and the occurrence of landslides. Analysis of soil erodibility factors seen from the physical-chemical properties of soil is one of the causes of erosion by using organic element parameters, soil structure, permeability, texture. The observation location was carried out on the disposal slope and low wall in-pit that has been revegetation with the hydroseeding technique. This research was carried out by making a design of erosion and sedimentation plots in the form of a zinc boundary measuring 2 x 2 m2, each box divides into three columns. The division of three columns in each box is done to get representative repetition data. Taking soil samples is carried out in each box using a sample ring.
Analisis Faktor Erodibilitas Tanah Penyebab Erosi di Area Tambang Batubara Site Melak Arisdiansyah Putra; Ratna Widyaningsih; Mohammad Nurcholis
Jurnal Mineral, Energi dan Lingkungan Vol 3, No 1 (2019): Juni
Publisher : Fakultas Teknologi Mineral, Universitas Pembangunan Nasional (UPN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/jmel.v3i1.2896

Abstract

Open-pit coal mining as done by the coal mining site Melak have a impact on the surrounding natural environment. The impact of mining operations is that the land becomes unproductive and erosion is very high because of loosing its vegetation on ex-mining land. Vegetation influence the sensitivity of the soil to withstand destruction and transportation by rain and surface runoff and the occurrence of landslides. Analysis of soil erodibility factors seen from the physical-chemical properties of soil is one of the causes of erosion by using organic element parameters, soil structure, permeability, texture. The observation location was carried out on the disposal slope and low wall in-pit that has been revegetation with the hydroseeding technique. This research was carried out by making a design of erosion and sedimentation plots in the form of a zinc boundary measuring 2 x 2 m2, each box divides into three columns. The division of three columns in each box is done to get representative repetition data. Taking soil samples is carried out in each box using a sample ring.
Modern Palacio-Blasingame Type Curve Method to Determine Well Production Characteristics and Reserves in Fields in Indonesia Muhammad Zakiy Yusrizal; Edgie Yuda Kaesti; Ratna Widyaningsih; Hari Prapcoyo; Nia Nuraeni
Scientific Contributions Oil and Gas Vol 48 No 4 (2025)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/scog.v48i4.1784

Abstract

Well production characteristics and reserves are critical parameters in field development planning and production optimization. In general, well production characteristics are obtained through well testing, followed by plotting and extrapolating flow rate against time, commonly referred to as the cumulative production curve. Conventional decline curve analysis models production decline under constant bottom-hole pressure during boundary-dominated flow periods. However, this approach is inadequate for analyzing data obtained during transient flow periods and requires substantial time and cost when applied to large fields with numerous wells. The modern Palacio-Blasingame type-curve method enables the integration of daily production data with reservoir information by accounting for variations in bottom-hole pressure and changes in gas pressure–volume–temperature characteristics as reservoir pressure declines. This approach enhances the accuracy of well performance evaluation and reserve estimation, provides a more comprehensive understanding of reservoir dynamics, improves efficiency by reducing analysis time and associated costs compared with the conventional decline curve methods.
Co-Authors Arisdiansyah Putra Edgie Yuda Kaesti Hari Prapcoyo Mohammad Nurcholis, Mohammad Muhammad Zakiy Yusrizal Nia Nuraeni