Fluid Oscillation Tool Restores Gas Delivery Rate from Storage Wells

Jockel, D.; Guoynes, John; Stilson, David

doi:10.2118/91390-ms

Cited by 6 publications

(1 citation statement)

References 4 publications

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“…The production oil wells increment rate after TFO [9] are showed in Table 1 as follows: These wells below experience with gas deliverability decline over the lifetime of the well for a variety of reasons but most often decline is caused by near-wellbore skin damage from either built up scale or drilling fluid damage. The Gas production wells increment rate after TFO [10] are showed in Table 2…”

Section: Case History #2 -Downhole Wellbore Treatment (Oil and Gas)mentioning

confidence: 99%

Field Application Review of Scale Removal on Geothermal Wells and Surface Production Facilities Using True Fluidics Oscillator (TFO)-Pulsating Waves Method Technology

Kushonggo

Pratama

Sutopo

et al. 2022

IOP Conf. Ser.: Earth Environ. Sci.

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Mineral deposition or scale is the main problem faced in geothermal energy management activities that occur in wells and in production facilities that cause a decrease in power plants’ capacity. Scales are formed naturally and cannot be prevented because it is associated with reservoir and operational conditions that are widely found in Indonesian geothermal systems, predominantly liquid dominated ones, therefore the advantaged technology is needed to clean the scale (scale removal) so that the ability of wells and power plant capacity is maintained. This research aims to offer the alternative method for scale removal using the True Fluidics Oscillator (TFO)-Pulsating Waves Method. This method combines mechanical processes, chemical processes, and wave processes simultaneously to provide solutions to clean scales inside or outside the production casing or perforation zone. This oscillator creates pulsating pressure waves within the wellbore and formation fluids. These pressure waves help to break up any type of near-wellbore damage and restore the permeability by carrying the fluid past the wellbore into the formation. The pressure waves expand in a spherical fashion from the point of origin providing 360° coverage while moving the tool across the interval. The TFO is not affected by standoff from the surface to be cleaned and TFO efficiently transfers the kinetic energy of the fluid pumped to the damaged zone. The use of TFO in conjunction with any chemical treatments will greatly enhance the chemical surface contact area. Technical and economic analysis of the operation of TFO is needed to be applied appropriately to the condition of geothermal systems in Indonesia by using examples of cases in the Central Java Geothermal Field to know the feasibility of the technology.

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Section: Case History #2 -Downhole Wellbore Treatment (Oil and Gas)mentioning

confidence: 99%

Field Application Review of Scale Removal on Geothermal Wells and Surface Production Facilities Using True Fluidics Oscillator (TFO)-Pulsating Waves Method Technology

Kushonggo

Pratama

Sutopo

et al. 2022

IOP Conf. Ser.: Earth Environ. Sci.

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A Sustainable Drive in Well Intervention Operations with Case Studies

Muhammad

Raza

Elmoneim

et al. 2022

Day 2 Tue, November 01, 2022

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Clean out using coiled tubing is the second largest application of coiled tubing after nitrogen kick-off. The advancements in coiled tubing metallurgies to intervene in complex wellbore geometries and precision of downhole simulators to predict on-site scenarios require more efficiencies from end tools that evolved from simple jetting tools to rotating jetting heads. The objective intended in the case studies performed in the Middle East and South Asia was to perform cleanout in scenarios where incumbent tools had failed in the past. The impact of jetting action in cleanout operations decreases with an increase in stand-off distance. It was confirmed from laboratory tests that a standoff of eight times the orifice diameter and fluid velocity of 200 ft/sec is required to remove moderate to hard deposits from wellbores. Conventional jetting tools have a standoff distance of more than 40 times and fluid velocities are below 200 ft/sec thus objectives are often compromised. A new type of fluidic oscillator was utilized in the case studies discussed in the paper. Unlike pulsating effects created by 1st generation of the fluidic oscillators, the SFO type oscillator had triple jetting action namely, Helix jetting, Pulses Jetting, and Cavitational jetting. The result of the clean-out with SFO technology was beyond expectations. It saved cost in all the case studies by an average of 35% if had been performed with incumbent technologies and increased production/injection from 30% - to 250% of the original value. Moreover, it reduced the operating times to two-thirds of conventional operations and increased the efficiency of treatment fluids which resulted in the reduction of waste of additives and extra additives to dispose of excess materials at wellsite. This is the first technology that used cavitational jetting in oilfield services and the first to use aforesaid jetting actions altogether in one tool. The technology adopted in the case studies doesn't have moving or rotating parts, thus eliminating the requirement to pull CT out of the hole for redressing and can perform long operations in one go. It doesn't depend on the centralization of the tool as the jetting effect is passed via kinetic energy through submersed fluids, thus can target deeper depth without limitations of the standoff. It allows a higher flow rate of liquid and gas, thus offering higher fluid velocities to perform an effective cleanout.

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Achieving Reliable and Cost-Effective Wellbore Cleanout in Depleted and Low-Pressure Wells Using CT Conveyed Fluid Oscillation Tool – Case Histories

Fazal,

Saeed,

Yousuf

et al. 2023

Day 1 Tue, December 19, 2023

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The production revival process through wellbore cleanout is majorly carried out using conventional jetting and rotating tools. The conventional tools effective distance is few times the diameter of nozzle and impact pressure of jet stream in fluid reduces significantly beyond several inches. Effectiveness of these tool is further reduced as they enter larger sized tubing, casing/open hole or due to standoff and are hence not effective for hard scales like barium sulphate. The wellbore cleanout operations become more challenging in depleted fields due to limitation of limited flow rate and lean nitrogen pumping through jetting tools, requiring extra CT trips to change BHA causing NPTs. Fluid oscillator tools, based on oscillation technology, produces emissions of alternating bursts of fluid that create pulsating pressure waves (300 to 600 Hz) within wellbore and formation fluids. These cyclic pressure waves cause fatigue breaking up wellbore hard scales like barite, paraffin/asphaltene and proppants. Since the FOTs do not have rotating part, it is compatible with high rate and lean nitrogen. The fast cleanout and lean nitrogen compatibility (avoiding extra trips to change BHA) reduces overall intervention time, thus well can be put back on production timely saving upto 50% of overall operations cost. This paper demonstrates the working principle and three practical applications of FOT at four different wells. The cleanout applications range from packed proppant cleanout to establishing clearance in 7" casing and more than 1,600 ft scale in HT well. The wellbore clearance, in these wells was established in less than 50% time compared to conventional jetting tools, saving more than 20% of overall operations cost.

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Fluid Oscillation Tool Restores Gas Delivery Rate from Storage Wells

Cited by 6 publications

References 4 publications

Field Application Review of Scale Removal on Geothermal Wells and Surface Production Facilities Using True Fluidics Oscillator (TFO)-Pulsating Waves Method Technology

Field Application Review of Scale Removal on Geothermal Wells and Surface Production Facilities Using True Fluidics Oscillator (TFO)-Pulsating Waves Method Technology

A Sustainable Drive in Well Intervention Operations with Case Studies

Achieving Reliable and Cost-Effective Wellbore Cleanout in Depleted and Low-Pressure Wells Using CT Conveyed Fluid Oscillation Tool – Case Histories

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