Oil is produced from sandstone reservoirs in many areas of the world, and sand production is a crucial problem in recovery from these reservoirs. The conventional methods to reduce this phenomenon are achieved by installing mechanical sand control systems. The HPOGC SES system is a new technique, which can result in better production parameters and satisfactory results.
The improved performance is directly attributable to the key features of SES:
- The SES system is the industry’s only expandable screen capable of achieving full borehole contact, eliminating annular flow, and reducing skin (lower skin factor compared to a gravel pack system).
- The SES screens are expanded to remove the annulus space. The larger inner diameter (ID) of the wellbore means lower friction, and hence less restriction to fluid flow.
- The sand grains are supported by the expanded SES screen, which in turn allows them to form a stable arch and creates a strong bridge, capable of withstanding very high forces.
- The SES system also has HSE advantages – no heavy lifts, no high-pressure lines on deck, and no consideration is required for storage and disposal of fluids.
- The SES system has proven to be more cost effective than traditional alternatives, due to operational simplicity and superior production results.
What is SES?
The HPOGC SES screen consists of three principal components:
- Slotted Base Pipe
- Filtration Medium
- Outer Shroud
The SES outer shroud covers the screen and protects the filtration medium during deployment. During expansion of the SES screen, the slotted base pipe and outer shroud slots open up and expand. The filtration medium consists of overlapping layers and slide over one another, as the pipe expands. It is important to note that the weave aperture of the filtration medium does not change during expansion.