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Back flushing

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Cumulative oil production after subsequent <b>back</b> <b>flush</b> treatments. Note: Y-a...
Published: 05 June 2013
Figure 4 Cumulative oil production after subsequent back flush treatments. Note: Y-axis removed to protect confidentiality of the data. More
Proceedings Papers

Paper presented at the SPE International Heavy Oil Conference and Exhibition, December 8–10, 2014
Paper Number: SPE-172886-MS
..., well killing and back flushing operations, etc. This paper presents the experience and results of utilization of Flush by Unit in the ongoing pilot wells which have proved this is a game changer technology for shallow heavy oil wells in Lower Fars reservoir by improving well intervention costs...
Proceedings Papers

Paper presented at the SPE Electric Submersible Pump Symposium, April 24–28, 2017
Paper Number: SPE-185130-MS
... activities performed inthe well site to revive these tripped wells, which were already pronounced failed were: ▪ Modified back flush procedures: pumping the fluid through annulus while ESP is running. This was carefully done while checking the surface load on the controller. ▪ Altered / by pass...
Proceedings Papers

Paper presented at the International Symposium on Oilfield Chemistry, February 28–March 2, 2007
Paper Number: SPE-106180-MS
... were obtained by back-flushing the column with tetrahydrofuran (distilled from LIAlH 4 ) after the collection of the aromatic fraction. These fractions were quantified gravimetrically after removal of solvent. Viscosity Determinations. Viscosities were determined using a rotary viscometer (Haake...
Journal Articles
J Pet Technol 65 (11): 32–33.
Paper Number: SPE-1113-0032-JPT
Published: 01 November 2013
... on correspondingly sized seats that have progressively larger diameters as operations advance from toe to heel. When all stages have been treated, the well is allowed to flow back, flushing the balls back to surface where they are caught in a ball trap. Despite more than a quarter of a million stages that have been...
Journal Articles
J Pet Technol 19 (03): 397–403.
Paper Number: SPE-1605-PA
Published: 01 March 1967
... mud or water can be substantially avoided through use of an initial low-pressure gradient followed by gradually increasing gradients during clean-up by reverse oil flow. On the other hand, attempts to improve the permeability of damaged Berea and oil formation cores with high-rate oil back flush...
Journal Articles
SPE Drill & Compl 14 (04): 266–273.
Paper Number: SPE-59484-PA
Published: 01 December 1999
... circulating the mud and back flushing the oil, were continuously monitored to evaluate the permeability damage. Damage arising from overbalanced conditions has been evaluated in terms of cake permeability, fluid loss characterization and reduction in oil permeability after mud exposure. For the three mud...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 6–9, 2013
Paper Number: OTC-24167-MS
... of the seawater compatibility with the reservoir rock and fluids, microbiological control, corrosion, etc. The solution was specified based on these studies and included subsea pumps, back-flushing filters, well components and topside facilities. In order to achieve required seawater flow rates, the adopted...
Journal Articles
Petrophysics 46 (06).
Paper Number: SPWLA-2005-v46n6a5
Published: 01 December 2005
... are the most significant factors that influence the uncertainty associated with a pressure gradient. Special attention has been given to maintaining the flowline fluid density constant. A specific procedure is introduced that combines back-flush and repeat pressure tests with controlled drawdown volume...
Proceedings Papers

Paper presented at the SPWLA 44th Annual Logging Symposium, June 22–25, 2003
Paper Number: SPWLA-2003-EE
... been developed that combines back-flush and repeat pressure tests with controlled drawdown volume. The issues we face in determining an accurate pressure gradient are discussed, and the precision pressure gradi- ent procedure that has been successfully applied to nu- merous client wells is presented...
Proceedings Papers

Paper presented at the SPE European Formation Damage Conference, June 2–3, 1997
Paper Number: SPE-38152-MS
... was achieved by performing static and dynamic filtration experiments in a specially designed core-holder cell containing 40 cm long sandstone core samples. Cumulative filtrate losses and pressure drops across six sections of the core while circulating the mud and back flushing the oil were continuously...
Journal Articles
SPE Prod & Oper 6 (04): 395–398.
Paper Number: SPE-19401-PA
Published: 01 November 1991
... wax deposition problems. Seven organic-solvent treatments performed to alleviate suspected waxproblems met with limited performed to alleviate suspected wax problems metwith limited success. Wells were also reperforated and subjected to diesel back flushes to mitigate near-wellbore damage...
Journal Articles
J Pet Technol 12 (06): 19–27.
Paper Number: SPE-1382-G
Published: 01 June 1960
... tried extensively along with the stimulation technique of the "high rate oil back flush", which consists simply of injecting large volumes of formation crude at high rates into the producing zone. Although several of the treatments individually have yielded no additional oil, well stimulation...
Proceedings Papers

Paper presented at the Abu Dhabi International Petroleum Exhibition & Conference, November 12–15, 2018
Paper Number: SPE-192830-MS
... SCCO2 flushing technology, using CO2. Another challenge is to change or empty the oil in one-way lines, and to get these lines unblocked. With the SCCO2 technology, it is possible to back-flush, and empty one-way line's like control-lines and umbilical's. By using the CO2 to get past the media...
Effluent Iron during Injection, Flow <b>Back</b> and Initial Post-<b>flush</b>. Significa...
Published: 24 June 2020
Figure 7 Effluent Iron during Injection, Flow Back and Initial Post-flush. Significantly more iron was released from low permeability Tarbert 1 compared with Ness 2. Minor consumption of iron was recorded during the shut-in period in Tarbert 1, whereas iron was further released in Ness 2. More

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