Publications

Rantau Bais O-O-82A is one of 3 Horizontal wells used to increase recovery from the Bekasap Formation in Rantau Bais. The Bekasap sand was characterizsed by higher productivity and lower oil viscosity compared to that of the Duri Formation. The Rantau Bais field has low oil gravity 17 to 22 deg API and high crude viscosity (average of 956 cp @ 100 F). The reservoir temperature is an average of approximately 130 F. The Horizontal well technique to improve oil recovery seems to be more suitable for the Bekasap Formation compared to the Duri Formation. A thermal recovery technique is more suitable to improve oil recovery in the Duri Formation due to the lower oil gravity and high viscosity. There are 2 sand exclusion methods, Gravel Packing and Stand-alone Screen (SAS). Standalone Screen is preferable due to the low risk and simple economics. Pre-packed screen is applied as it is very efficient in filtering formation sand. The SAS will retain the formation sand but the fines can cause the screen to plug and effect the production rate. When the initial completion was conducted we installed a 6.625 perforated casing instead of the SAS type of completion. Due to the perforated casing completion type, it would be necessary to regularly clean out the sand in this well. This well has experienced “no pumping problems due to low Fluid Above the Pump (FAP). To ensure fluid intake availability in the well bore there must a technique to deepen the pump set in the horizontal well. Metal to metal contact between rod and tubing would occur if we deepened the pump set in the slope position. In this case, friction between the rod and tubing could lead to wear problems. We propose to use the Rod Guide System to ensure the rod position is centered in the tubing so that there is no contact between metal and metal (rod and tubing). The rod guides are made of composite material and are a sacrificial component.