Pratama, Gandi (2024) Prediksi Performance Laju Alir Produksi Pada Kondisi Well In Tight Oil Reservoir Untuk Menentukan Remaining Reserve, Recovery Factor, Serta Estimated Ultimate Recovery Dengan Metode Decline Curve Analysis Pada Software Oil Field Manager. Other thesis, Universitas Islam Riau.

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Abstract

The remaining reserves occur when the well is already producing. The production well data is used to determine when the well can still be produced and how much reserves can still be produced. One way to determine the remaining reserves, forecast the future production flow rate of a reservoir and determine the downward trend in production is to use the decline curve analysis (DCA) method. DCA calculations are used in the early stages of production where wells are still producing in natural flow and artificial lifting mechanisms to produce oil, so it can be used to determine the limits of a well using the decline curve analysis method. This method also calculates the amount of oil reserves that can be produced and estimates the reservoir performance (forecasting) by considering field development. By determining the equivalent type of decline. This research was conducted at the Y#08 well with tight reservoir conditions to determine the reservoir performance in producing oil and gas reserves, aiming to determine the amount of remaining reserves, determine the trend of production decline, determine the remaining production time, determine the recovery factor (RF) and determine the estimated ultimate recovery (EUR) using oil field manager software (OFM). The parameters used that need to be known are OOIP and well production data consisting of production flow rate, production time, and cumulative production. Where it is known that the OOIP value that has been calculated previously is 3,924,981 MMSTB. Based on the results of the analysis carried out using the decline curve analysis method, it is obtained that the type of decline curve is equivalent to hyperbolic decline with a value of b = 0.877 on a stable downward trend in production in the period April 2019 to February 2020. For further analysis, the value of (RR) is 28,574 MSTB, the value of EUR is 865,047 MSTB, and the RF value is 2.2%. The results of the estimation determination were analyzed by decline curve analysis of the production life of the Y#08 well until the q limit is 120 months until February 28, 2034.

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