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All Journal JOURNAL OF EARTH ENERGY ENGINEERING Jurnal Ekonomi Bisnis dan Kewirausahaan
Guntur Setiawan
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Earth & Planetary Sciences Economics, Econometrics & Finance Energy Engineering Materials Science & Nanotechnology Other

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Perbandingan Analisis Decline Curve antara Metode Trial Error dan Decline Type Curve Matching Untuk Menentukan Cadangan Minyak Sisa Guntur Setiawan
Journal of Earth Energy Engineering Vol. 5 No. 2 (2016): OCTOBER
Publisher : Universitas Islam Riau (UIR) Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22549/jeee.v5i2.479

Abstract

Decline curve analysis often used to determine remaning reserves in a reservoir. To analyze with this method, the decline type curve from production period (trend) must be known. To determine decline type curve, in this paper will use two methods there are: trial error & x2 chisquare test and decline type curve matching. Both of methods have different way to determine decline type curve. Trial error done by making tabulation and calculation, while decline type curve matching done by overlay. The calculation are aimed to determine decline type curve, Remaining Reserves (RR) and Estimate Ultimate Recovery (EUR). Analysis done by taking sample of data well X which is a new well produced since September 2013 till the last data is Febuary 2016. First step of this study done by making type curve from equations and assumptionin literature then plot production rate vs time and choose production period (trend) to be analyzed. After that, determine decline type curve by trial error and decline type curve matching and do forecast until get remaining reserves and estimated ultimate recovery if economic limit rate production known. From calculation of both methods, resulted exponential decline type curve. For the error method obtained RR 41322,3 STB and EUR 240328,9 STB, while for decline type curve matching obtained RR 40534,2 STB and EUR 239540,8 STB
ANALISIS RETROSPEKTIF STRATEGI LOKASI DAN TATA LETAK WARUNG KELONTONG ‘ASA’: BUKTI EMPIRIS DAMPAK PERUBAHAN LINGKUNGAN TERHADAP KEBERLANGSUNGAN USAHA Chalawah Ummy Sa'diyah; Guntur Setiawan
Jurnal Ekonomi Bisnis dan Kewirausahaan Vol. 3 No. 1 (2026): Februari : Jurnal Ekonomi Bisnis dan Kewirausahaan (JEBER)
Publisher : CV. Denasya Smart Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.69714/09vva231

Abstract

Not all small businesses are able to remain sustainable even when offering similar products, prices, and marketing strategies, as external conditions particularly the surrounding environment and spatial layout often play a decisive role in performance. This study examines the evolution of the “ASA” Convenience Store from 2009 to 2020, which initially grew due to its strategic proximity to a college campus, student housing, and a morning market, but experienced a sharp decline in customer traffic following the closure of the campus. Using a descriptive-analytical method and a qualitative approach, data were collected through interviews, observations, and historical documentation, and analyzed with reference to Central Place Theory (Christaller, 1933)  and small business layout principles. The findings indicate that while strategic location and effective spatial planning can enhance customer appeal and operational efficiency, these advantages are dynamic and must be continually adjusted to changing socioeconomic conditions, underscoring the importance of adaptive strategies for sustaining small business continuity.
Co-Authors Chalawah Ummy Sa'diyah