已发表: 01/01/2010
已发表: 01/01/2010
Well Information |
|
| Location | Rang Dong Field, Offshore Vietnam |
| Spud/completion | August 2004 |
| Interval drilled | 8 ½-in. horizontal hole for a total of 433 m (1420 ft) – from 2410 to 2843 m (7907 to 9327 ft) |
| Disposal method | Discharged cuttings overboard |
Extensive laboratory testing was performed prior to the drilling and completion of the well. Shale inhibition and solids contamination tests were done at the M-I SWACO Regional Laboratory in Jakarta. Filtercake cleanup efficiency was evaluated and extensively tested at Constien & Associates Laboratory in Oklahoma, USA.
The GLYDRIL-IDCAP D system was chosen since it could provide good shale inhibition while maintaining good filtercake cleanup efficiency with 10% HCl. A total of 433 m (1420 ft) of reservoir section was drilled with no hole-related problems.
The initial dilution rate was 1.65 bbl/m (0.50 bbl/ft) drilled. The dilution rate was increased to 3.0 bbl/m (0.91 bbl/ft) drilled during the last 140 m (459 ft) because the formation being drilled was primarily siltstone. Dumping and dilution were performed simultaneously to keep the fluid properties within specification.
Although four VSM shakers, dressed with 185-mesh DURAFLO screens, were available, only two were used while drilling the reservoir section. These two shakers could handle a 600-gpm flow rate.
A 1.15-sg (9.6 lbm/gal) filtered KCl brine was used as a completion fluid. The sand screen was set in place as programmed. Filtercake cleanup was performed twice with a 10% HCl solution. A 1.03-sg (8.58 lbm/gal) filtered KCl brine was used as a packer fluid.
“The GLYDRIL*-IDCAP* D system was used to successfully drill an 8 ½-in. horizontal reservoir section, offshore Vietnam as programmed. The well was completed open-hole with a stand-alone sand screen.”
F. Huadi, Operations Engineer – Tech Support
If you’d like to know more about the GLYDRIL-IDCAP D system for Reservoir Drilling Fluid applications and how it’s performing for our other customers, please call the M-I SWACO office nearest you.
Challenge: A sand control screen is required to prevent sand production.
Solution: An inhibitive water-base reservoir drill-in fluid (RDF) was needed to drill the reservoir section to minimize sand screen plugging resulting from clay swelling and dispersion, as well as provide good hole integrity.
Results: Drilled 433 m (1420 ft) of reservoir horizontally with no hole-related problems. Operator achieved the expected production rates and proclaimed the well a 100% success.
