... Abstract The paper will include an introduction of dissolvable plug and its development in oil & gas upstream business. Dissolvable plug is a customized tool, and it could be modified by controlling its chemical compound to adjust its dissolving rate. In addition, high clearance dissolvable...

... the hydro test at 2,500 psi surface pressure. Otherwise, the contingency plan must be applied i.e. set two metal plugs above the topmost perforation and cover with 30 m of dumped cement. In the first two wells, the pumping operations were completed as plan but failed the hydro test even surface samples had...

... Abstract Plugging and abandonment operations may require multiple cement plugs to isolate a given wellbore from the surface or seabed. The rig operational time placing and then validating the integrity of selective cement plugs could range from a couple of days to one week depending...

... cement plug barriers or placing adequate barrier leaving the completion barrier left in hole. When the complete or portion of well completion tubular are left in hole and permanent plugs are installed through and around the tubular it is always desirable to establish & verify the position...

... for the cementing operations; there was no requirement to clean the tanks between mixing the cement setting spacer and the cement spacer used to cement the plug. After the pill was mixed, the tubing was punched at 4,100 ft, and a 500 ft thixotropic water-based pill was set in the annulus and outside of the punched...

.... If the annular casing does not have enough free space (hydrostatic pressure of mud or brine less than pressure from below): (i) Perforate then squeeze cementing close to the casing shoe; (ii) Cut or milling the casing which close to the casing shoe, reaming then place the cement plug. According to NORSOK D...

... Stage 1: Five production wells and one temporary abandonment well would be plugged and abandoned permanently. Recover all the Christmas trees. Stage 2: Flushing, preparations for decommissioning safely would be made. Stage 3: Facility decommissioning. Piles and casing strings would be cut...

... Abstract Shutting the aging well for good towards the end of field life requires a lot of operational and technical considerations as well as high cost to ensure project viability and safe operation. Procedures to evaluate competent cap rock layers as natural formation barriers, well plug...

... Abstract Objectives/Scope The Perforate, Wash and Cement technique has been widely implemented in the remediation of annular cement in recent years, with the application gaining increasing confidence within the Well Integrity, Plugging and Abandonment sectors. With the increase in confidence...

... hydrocarbon potential are permanently plugged and abandoned (P&A) in 2014-2016. Of these wells, four wells located on the seabed were installed with wet trees and utilize a jackup rig to abandon the wells. As for the other wells which trees are located on the platform and its P&A works utilize...

... Abstract A semi-submersible drilling rig chosen to perform the subsea well abandonment. The campaign consisted of abandoning four development wells which were completed with Horizontal Xmas Tree and having sustained casing pressure. In this paper, the methodology for performing the plug...

... method to set deep barrier again. This operation is illustrated in Figure 7 . Improve efficiency to verify the plug in the well with leaked surface casing, Introduced the Tension set packer (AD-1 packer) which was compact, economical, retrievable packer. to allow barrier pressure test...

... to be plugged. An adjustment made by optimize it to fit-to-purpose abandonment according to Indonesia national standard while complying with the feasibility and safety operation. As a result, there is a decrease in average AFE cost during 2015 to 2017 by 29% which equal to US$8.5 million and still has decrease...