..., strong water drive and uneven current fluid contacts. Prior to drilling this well, attempt was made to mitigate the uncertainty regarding the current gas-oil contact (GOC) and oil-water contact (OWC) by carrying out cased-hole logging in some of the adjacent wells, and re-sequencing and re-optimizing...

... reservoirs. The case of M & N reservoirs with high uncertainty of fluid contact location necessitates a continuous program of data gathering of which should be strictly adhered to closely monitor the dynamics of the reservoir. As proven in the B Field, offshore Sarawak, the acquired cased-hole logs...

... and structural and bubble maps of all reservoirs. These maps were used in conjunction with original and current fluid contacts and helped to identify and locate remaining oil accumulations. The target portfolio was screened and ranked, and preliminary wellbore paths were built. Four (4) new wells and eight (8...

... the well is drilled. Integrated with other LWD and surface logging data, pressure gradient analysis is able to provide valuable insight for planning subsequent fluid sampling, well completion and reservoir development programs which require accurate assessments of fluid types, fluid contacts, reservoir...

... built as part of the geological review. Reservoir performance review was carried out in conjunction with material balance and average fluid contact movement calculations to understand the drive mechanism and to estimate the current fluid contacts. Performance matching was carried out with an analytical...

... proven valuable input to the reservoir model. belida field saturation fluid contact borehole caliper reservoir model verification well logging upstream oil & gas blast joint indonesia simulation gamma ray cement evaluation log reservoir simulation lower arang carbon oxygen...

.... Because this reservoir was scheduled for gas-cap blow-down, this 100 MBO would not have been produced without accurate measurement of the remaining oil leg. spe 68686 producer saturation upstream oil & gas fluid contact oil water contact well logging case history porosity attaka field...

... locating the current fluid contacts and optimizing well placement, as coning effects from both gas and water could severely hinder recovery. The paper presents a field case study demonstrating the use of horizontal wells to improve oil recovery for thin oil columns affected by gas-cap and active water...

... of the wells is to develop a 40 m thick oil rim, maximising the oil recovery and offtake rates, while delaying gas and water breakthrough. Drilling short pilot holes at the entrance of the horizontal section to establish accurately the depth of the fluid contacts is important to achieve optimum placement...