The objective of this session is to highlight the EOR techniques pertaining to the oilfields of Sudan, give some flashback on international experience in the two selected topics and show the economic merits of planning ahead (early in the field life before development) to implement these techniques. This also session reveals the early screening for EOR.
This session shows the importance of drilling horizontal wells in comparison with the vertical ones. The areas of implementation, the production gain, will be discussed using real field examples. The technology utilised in drilling multi-lateral wells (geo-steering) will be reviewed. The measurements while drilling (MWD) will be discussed and the completion technology will be demonstrated by a few examples.
Proper data collection, production monitoring, field measurements and routine testing are usually planned by oil companies based on a set schedule. The objective being to build a database for effective reservoir management, performing field development studies and taking remedial actions on time. Data gathering strategy, type and the integrity of the measuring devices are key elements for effective resource managements and production optimisation. The objective of this session is to discuss the common field practice and to recommended reservoir management strategy and data gathering plans.
Water shut-off posed a challenge to production from the Sudanese oilfields. Despite the repeated attempts using different techniques to cure the problem, water production issues still persist. This is due to the channelised nature of the fluvial depositional environment. Streaks of high permeability or the central areas of the channel deposits may provide a conduit for the less viscous water to by-pass the oil and reach the producers.
Compartmentalisation resulting from poor stacking of sand bodies or permeability variation may also result a pronounced percentage of by-passed oil. Water shut-off techniques and recovery of by-passed oil need to be investigated to tackle this water production problem which is worrying the production and field development staff. This session reviews the general problems of water production and discusses the shut-off techniques successfully applied in the oil industry.