firstly thank you for a informative video, could you please explain that, why they did not continued to perforate wellbore with jetting mud and why they substituted with perforation guns to perforate next section?
Once the toe of the well is perforated and you can inject fluid into the well, pumping wireline perforating guns down the well for the following zones is a much cheaper alternative than abrasive perforating every zone on coiled tubing.
What happens to all the fracking fluid flow back in order to insert the plugs? Wouldn’t all the fluid need to be removed to get the plug in? And wouldn’t a bunch of gas be lost in the process? It’s not like the gas is going to say “let’s wait until all 8 of the fracking stages are complete before we start migrating to the well head”. Can someone please clear up this confusion for me?! Thanks!
The plugs are set with fluid pressure and are seated.. the fluid moves into the fractured zones. Sometimes multiple attempts are made to seat a ball (plug). Regardless, well pressure is matched before you open the well head. Hope I understand your question.
all that excess water that has to come out and be removed during the fracking process has to be collected and sent to a Saltwater Disposal Well. Yes, there is some oil and gas inside that watery mixture. When the gas arrives at a SWD facility (either in 18wheeler trucks or via pipeline), the water is collected in large tanks. The water separates from the oil and gas. The oil and gas are collected (called skim oil because they skim it off the top) and sold, while the water is injected deep under the ground through the disposal well. SWD wells typically charge drilling companies $0.40 - $0.50 per barrel of saltwater. It takes around 350,000 barrels of saltwater to frack a well and get it ready for production (depends on the specifics of the well).
Wouldn't this process take more time than the traditional perforation gun? I don't see the benefit of this system other than its safety. With a perforation gun you can fire off many projectiles at once, increasing your perforations at given depths. This seems like it would take very long and only give you two holes per depth. Can you please explain.
Plug and perf methods are designed with multi stages so when they frack after it they can create effective fractures throughout the whole producing interval. as for the abrasive perforation method with sand slurry, it is used because this perforation creates no casing deformation or debris left in perforation to effect permeability. the velocity from the nozzle creates numerous pathways and channels to natural fractures and allows for a more effective frack after. yes the time it takes to complete the perfs is longer but can be more effective in situations like heavy oil ,thin reservoirs, extremely deviated wells,preventing near wellbore friction, and less tripping in and out of the well.
This abrasive perforator was developed to reduce a coiled tubing trip into the well. With pressurized toe sleeve technology of today it might be a mute point, but when developed, two CT trips were required to start the plug/perf/frac completion operations. 1st trip would be a milling operation with drift diameter mill to cleanup any residual cement, and then a 2nd CT trip with TCP guns to perforate the toe and enable pumpdown of wireline which is a cheaper conveyance mode. This tool enabled the toe to be perforated on the cleanout run to save a CT trip ($25-35k), enabling wireline pumpdown of guns for all remaining zones.
How is the last plug milled?? As in the video it is shown that some part of the tool the plug remains and is press against another plug, so what about the last plug?
Weatherford ,coming with it
This technology is incredible
firstly thank you for a informative video, could you please explain that, why they did not continued to perforate wellbore with jetting mud and why they substituted with perforation guns to perforate next section?
Once the toe of the well is perforated and you can inject fluid into the well, pumping wireline perforating guns down the well for the following zones is a much cheaper alternative than abrasive perforating every zone on coiled tubing.
hello Could you tell me the 3d animation software made that drilling process ?
who does the perforation and the fracking? is that the job of the drilling contractors or the service companies?
service companies
What happens to all the fracking fluid flow back in order to insert the plugs? Wouldn’t all the fluid need to be removed to get the plug in? And wouldn’t a bunch of gas be lost in the process? It’s not like the gas is going to say “let’s wait until all 8 of the fracking stages are complete before we start migrating to the well head”. Can someone please clear up this confusion for me?! Thanks!
The plugs are set with fluid pressure and are seated.. the fluid moves into the fractured zones. Sometimes multiple attempts are made to seat a ball (plug). Regardless, well pressure is matched before you open the well head. Hope I understand your question.
all that excess water that has to come out and be removed during the fracking process has to be collected and sent to a Saltwater Disposal Well. Yes, there is some oil and gas inside that watery mixture. When the gas arrives at a SWD facility (either in 18wheeler trucks or via pipeline), the water is collected in large tanks. The water separates from the oil and gas. The oil and gas are collected (called skim oil because they skim it off the top) and sold, while the water is injected deep under the ground through the disposal well. SWD wells typically charge drilling companies $0.40 - $0.50 per barrel of saltwater. It takes around 350,000 barrels of saltwater to frack a well and get it ready for production (depends on the specifics of the well).
incredible technology
Wouldn't this process take more time than the traditional perforation gun? I don't see the benefit of this system other than its safety. With a perforation gun you can fire off many projectiles at once, increasing your perforations at given depths. This seems like it would take very long and only give you two holes per depth. Can you please explain.
Why is the first process used when you will plug and perf the sections above it anyway.
Plug and perf methods are designed with multi stages so when they frack after it they can create effective fractures throughout the whole producing interval. as for the abrasive perforation method with sand slurry, it is used because this perforation creates no casing deformation or debris left in perforation to effect permeability. the velocity from the nozzle creates numerous pathways and channels to natural fractures and allows for a more effective frack after. yes the time it takes to complete the perfs is longer but can be more effective in situations like heavy oil ,thin reservoirs, extremely deviated wells,preventing near wellbore friction, and less tripping in and out of the well.
This abrasive perforator was developed to reduce a coiled tubing trip into the well. With pressurized toe sleeve technology of today it might be a mute point, but when developed, two CT trips were required to start the plug/perf/frac completion operations. 1st trip would be a milling operation with drift diameter mill to cleanup any residual cement, and then a 2nd CT trip with TCP guns to perforate the toe and enable pumpdown of wireline which is a cheaper conveyance mode. This tool enabled the toe to be perforated on the cleanout run to save a CT trip ($25-35k), enabling wireline pumpdown of guns for all remaining zones.
How is the last plug milled?? As in the video it is shown that some part of the tool the plug remains and is press against another plug, so what about the last plug?
I'm guessing you'd hope it catches on bottom? Maybe plug 1 doesn't have the same lower portion
Milled when it hits the toe/cement?
Or just milled out when the service rig comes to run production and set the pump Jack
whats a wireline?
+The Man but why do we have oil in the reservoil?
its deposited there
So, that is also why we have gas in the reservgas??
glossary.oilfield.slb.com/en/terms/w/wireline
Brown oil tools
Español??