Layer | Fill | Outline |
---|
Map layers
Theme | Visible | Selectable | Appearance | Zoom Range (now: 0) |
---|
Fill | Stroke |
---|---|
Collaborating Authors
Results
Electric-Line Deployed Lightweight Intervention Technology for The Effective Removal of Barium Sulphate Scale Obstructions from Small Diameter Wellbores
Haugen, I.. (Statoil) | Døssland, L.. (Statoil) | Brankovic, M.. (Qinterra Technologies) | Osaland, E.. (Qinterra Technologies) | Osugo, L.. (Qinterra Technologies) | Grødem, M.. (ALTUS Intervention) | Grønnerød, Anders (ALTUS Intervention)
Abstract Barium Sulphate (BaSO4) scale is classified as a hard scale and removal is extremely resistant to both chemical and mechanical methods. Coiled-tubing deployed mechanical intervention is effective, but with inherent logistics, footprint and cost implications. Electric-line deployed wellbore cleanout systems have the advantage of being light and easily deployable. In wellbores with inside diameters (ID) of less than 3 in., removal and downhole collection of hard debris has proved to be a particular challenge. This paper describes a wellbore cleanout operation on powered electrical wireline in the North Sea. The main operational objective was to clear out the wellbore to the top of a suspected malfunctioning Sliding Side Door (SSD), with a drift ID of 2.797 in. Access was required to run a tubing punch to establish communication with the target reservoir and therefore restore well production. The debris severely plugging the wellbore was predominantly BaSO4 scale. Slickline broaching was initially attempted to remove the obstruction, but could not make sufficient progress. An electric-line deployed wellbore cleanout system, with bottomhole assembly (BHA) outside diameters (OD) of 2.625 in. and 2.75 in. and reservoir chamber OD of 2.5 in. was subsequently deployed, which was effective and consistently able to interact with, and remove to surface, the scale blockage. 168.6 litres of debris was collected by the electric line wellbore cleanout system. Contributing to the success of the operation was extensive pre-job testing and measurements executed in the laboratory. These simulated downhole completion geometry and expected debris condition and interaction. The pre-job test results fed in to the design of an optimum BHA and were a basis for decision-making during the operation. The resulting system design maximised solids recovery per run, which increased cleanout and collection efficiency. A surface wellsite washout system was used to clean out the collection chambers, which enabled the rapid turnaround of equipment in-between runs. Cleanout was executed through multiple runs, with the majority returning maximum fill to surface, which ultimately gained access to target depth as efficiently as possible. A multi-finger caliper log run confirmed the removal of the obstruction and a tubing puncher was run to perforate the inner tubing. Production was restored, with an average (over the first three months) oil production rate of 1,290 STB/D (205 Sm3/d), gas rate of 7.2 MMscfd/D (204,321 Sm3/d) and water cut of 69%. This is the first time that an electric-line deployed wellbore cleanout system with an OD as small as 2.625 in. has delivered high, successive, repeatability in cleaning out hard BaSO4 scale from a completion with an ID as small as 2.797 in.
- North America > United States > Texas (0.47)
- Europe > United Kingdom > North Sea (0.34)
- Europe > United Kingdom > North Sea > Central North Sea > Central Graben > Block 21/10 > Forties Field > Forties Formation (0.99)
- Europe > Norway > Norwegian Sea > Halten Terrace > Block 6507/11 > Åsgard Field > Åre Formation (0.99)
- Europe > Norway > Norwegian Sea > Halten Terrace > Block 6507/11 > Åsgard Field > Tofte Formation (0.99)
- (40 more...)
Electric Line Deployment of a Stackable Straddle System for Gas Zone Shutoff in a Highly Deviated Extended Reach Borehole
Agayev, F.. (BP) | Gathman, B.. (BP) | Bonnett, T.. (Qinterra Technologies) | Osugo, L.. (Qinterra Technologies) | Bjorn, B.. (Interwell)
Abstract Stackable straddle systems are presented as an effective method of increasing oil production rates in a highly deviated extended reach borehole, by isolating or reducing gas production from high influx zones. In the case study presented in this paper an openhole gravel pack (OHGP) production well was experiencing a high gas/oil ratio (GOR), with production from the upper gas zone limiting oil production from the lower zones. The borehole was highly deviated with a maximum inclination of 72° and an extended reach of 5800 meters. A gas shut off intervention solution was required. Tractor conveyance and powered mechanical stroker systems were selected to deploy the stackable straddle system, because they were the most effective and precise method. Gas/oil production data and a distributed temperature sensing (DTS) system log were used as inputs for the optimal straddle length and position. The stackable straddle system, with a total length of 70.2 meters and isolation length of 64.7 meters, was successfully deployed and sealed off against the OHGP completion in the required position to shut off unwanted gas production. The oil production rate increased by approximately 3,000 stb/D. The GOR decreased from approximately 5,200 to 4,100 scf/bbl.
- Asia > Azerbaijan (0.29)
- North America > United States > Texas (0.28)
Removing Settled Barites From a Wellbore Using an Electrically Powered Well Cleanout System
Kleppan, T.. (BP Norge) | Dahle, K. O. (BP Norge) | Tinnen, B.. (Qinterra Technologies) | Brankovic, M.. (Qinterra Technologies) | Osugo, L.. (Qinterra Technologies) | Danielsen, R.. (ALTUS INTERVENTION)
Abstract This paper describes a job on a well in the Valhall field to remove approximately 241 liters of settled barite in order to gain access to retrieve a bridge plug assembly that had been installed in the well for more than seven years. The traditional industry methods of cleaning out such debris are mechanical bailers run on slickline, or coiled tubing. The clean out was initially started as planned with conventional bailers run on slickline. After 19 runs and 88 liters of debris removed, mechanical slickline bailers made no further progress, as a result of increased debris compaction. The powered wellbore cleanout system was then run. This system had been extensively tested on a test rig before the job with samples simulating expected downhole debris conditions. This testing resulted in a number of toolstring configuration options dedicated to the downhole challenges expected in the well and the use of two technologies (debris collector and suction tool), to retain and transport the debris from the well. The powered wellbore cleanout system successfully removed all the remaining debris (152 liters). It was able to continue from where the mechanical slickline bailers stopped and removed the remaining debris three times faster than the mechanical slickline bailers. Each run with a powered wellbore cleanout system could collect, on average, approximately five times the volume of debris collected by conventional slickline bailers.
- North America > United States > Texas (0.28)
- Europe > Norway > North Sea > Central North Sea (0.25)
- Europe > Norway > North Sea > Central North Sea > Central Graben > Block 2/8 > Valhall Field > Tor Formation (0.99)
- Europe > Norway > North Sea > Central North Sea > Central Graben > Block 2/8 > Valhall Field > Hod Formation (0.99)
- Europe > Norway > North Sea > Central North Sea > Central Graben > Block 2/11 > Valhall Field > Tor Formation (0.99)
- Europe > Norway > North Sea > Central North Sea > Central Graben > Block 2/11 > Valhall Field > Hod Formation (0.99)