Customer challenges
- Expro worked with BP to develop engineered solutions for successful rigless abandonment of Miller Platform wells
Expro Excellence
- Services supplied included drift runs to ascertain through-bore access, and acquisition of pressure and temperature data – crucial in defining the final well abandonment design and methodology
- Due to the presence of deep set control lines, production tubing was pulled from seven of the drilling slots, with the remaining 15 wells abandoned thru- tubing involving explosive punching followed by circulation of viscous pill and final placement of cement plug – a minimum of three cement plugs were set in each well
- The reservoir was first isolated through the installation of wireline set mechanical bridge plugs, run through tubing and then set in the liner above the main reservoir
- In addition to standard operations, and in support of rigless abandonment, Expro engineered perforating gun strings to perforate multiple eccentric tubing and casing strings prior to cementing operations
- Specifically, Expro were able to orientate the perforating guns to sit on the low side and adjusted charge penetration to perforate selectively the 5” production tubing and 95/8” casing, without perforating the 133/8 casing
Value to client
- Contract was undertaken on a risk and reward basis
- Expro performed pre-abandonment logging operations to establish well integrity prior to finalising the abandoned design for each well
- Large number of operations performed with high level of operational efficiency
- Subsurface knowledge of well construction and completion design, provided insight into potential abandonment hazards – eccentric casing
- Ability to engineer tools to meet rigless abandonment requirements
