#TITLE_ALTERNATIVE#

• Main Author: M. T. MALAU (NIM 12203029); Pembimbing : Dr. Pudjo Sukarno dan Amega Yasutra, MS, LEONARD
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/18832
• Institution: Institut Teknologi Bandung

This paper presents the result of research about the development of 2 phase flow IPR curve conditions for wells producing from solution gas drive reservoirs, which have reservoir pressure greater than the bubble point pressure. Once, the reservoir pressure reaches the bubble point pressure and continuously declining, then gas in solution will be liberated and accumulated in the pores, and the gas will not flow until the gas saturation reaches the critical gas saturation. When the accumulated gas is in static condition, the gas will block the oil flow from the reservoir to the bottom of the well. The gas resistance to the oil flow will increase that is affected by flow resistance factor which depends on flow rate and time. This flow resistance is usually happens in the solution gas drive reservoirs or condensate gas reservoirs. In an oil reservoirs with reservoir pressure above the bubble point pressure, the gas saturation still has zero value because the gas hasn't released from the oil. At below the bubble point pressure, free gas from oil will be form, but it will not flow until the saturation of the liberated gas reach critical ga s saturation. The gas which is not flowing produce resistance to oil flow, and this resistance is decreasing if the free gas started to move and flow in the porous media simultaneously with the oil. The flow resistance is very much depends on the production rate and the production time, therefore this flow resistance is being represented as skin factor that depends on production rate and time, S(q,t). In this research the S(q,t) curve as well as the IPR curve are presented on this paper, and the model for calculationg skin factor and IPR curve are developed by using reservoir simulator. Those model has a cylinder shape, homogeneous, isotropic, with single well at the centre of the reservoir. The reservoir model is developed by using CMG simulator and the S(q,t) values are predicted using conventional pressure build up analysis. The IPR curve development is conducted after the S(q,t) relationship with time is achieved at the production wells. Parameters that assumed have influenced to the development of these IPR curve are reservoir pressure, skin caused by flow rate and production time, S(q,t), well flowing pressure (Pwf), production flow rate, and the maximum oil flow rate that can be obtained by the production well. In the development of IPR curve for the solution gas drive reservoir, it also comprise the various sensitivity of rock characteristics (absolute permeability), fluid characteristics (API, critical gas saturation, gas specific gravity) as well as the reservoir condition (reservoir temperature). The non linear regression to the IPR curve that obtained from the model produced the proposed IPR equation that can be used for analyse the performance of production wells from the solution gas drive reservoirs as long as the flow resistance that depends on oil flow rate and production time,S(q,t) still occurs at the surrounding wellbore.