Case Study of Down-hole Tool Development to Deploy Sand Screens in ERD Wells, Extending the Boundaries, Saving Opex, Reducing Risk and Improving Operational Efficiency
|Publisher:||Society of Petroleum Engineers|
|Content Type:||Conference Paper|
|Authors:||Doug Gillespie and Keith Bradford, Caledus Ltd., and Rod Elliott, Vermilion Oil and Gas|
|Source:||Offshore Europe, 8-11 September 2009, Aberdeen, UK|
|Copyright:||2009. Society of Petroleum Engineers|
|Disciplines:||1.3.2 Horizontal/Multilateral Wells|
Sand control screens are a commonly deployed method in the Oil & Gas industry to aid production in well bores, typically where the formation is such that “standard” completion methods would fail quickly through sand incursion. Sand control screens are used to enhance wellbore stability and optimise productivity when run in unconsolidated formations.
A common challenge occurs when formation sand is mixed through reservoir fluids, when run in unconsolidated sandstones. This mixture of sand and fluid can lead to problems such as plugging, damage to monitoring tools and erosion of equipment exposed to these abrasive fluids. Sand control screens act as a filter, to allow reservoir fluid ingress to the completion string keeping the sand content out. The very nature of the screens means they are quite delicate and easily susceptible to damage.
In recent years, Extended Reach Deployment or ‘ERD’ wells have become more common, ever longer and more challenging in order to get completions to TD. Furthermore, this problem becomes exaggerated when running delicate completion strings with sand control screens. More so when you consider it is not desirable to have the completion aggressively pushed or rotated.
This paper outlines the common problems identified with Sand control Screen Deployment. Furthermore it will look at how a new deployment tool overcame these issues within set operational restrictions, with reference to documented field results.