Hi Nour. That's a great question with a complicated answer. Some of the key factors to consider are the cost of the completion and the efficiency during the frac job. Another consideration is whether the completion impacts production by using single-entry points to fracture through ( ball-activated and coiled-tubing-activated sleeves), or multiple-entry points (cluster perforating with PNP) to fracture through. Executing the fracturing operation through single- or multiple-entry points could have an impact on production and ultimate recovery. This subject is highly debated and there are operators and service companies on both sides of the argument. The PNP completion system only requires casing and cement to install the system, so it is the cheapest to install. I believe that the low upfront cost of the PNP system is a large reason why the US market has seen a shift to PNP completions in the downturn. What are you seeing in the Canadian market?
hi .. i just want to know why to inflate the packer if i want to pump the sand out .. wouldent that let sand get between the packer and casing and mite end up in a stuck situation ? regards
Hi Ahmad. Just to clarify, this is not an inflatable packer, it is mechanical-set and/or hydraulic-set. You have to set the packer to isolate from the previously fractured stage and divert the fluid into the intended sleeve. Check out the video around the 4:50 time frame to learn how to recover if the assembly does get stuck.
What is the purpose of this technique with the frac sleeves if you can do the same thing without them? What's the advantage of having the frac sleeves there?
Hi Nick. There are several advantages to having the sleeves. The primary advantage is the time saved from sand-jet perforating each stage. For example, if you're doing 50 stages and it takes 15 minutes to sand-jet perforate each stage, that would require 12.5 hours of sand jetting time. Also, prior to perforating through the casing all of the sand from the perforating piles up in the casing. When using the sand-jet perforator, the operator has to ease into the frac job or they run a high risk of screening out due to pushing the excess sand out of the perforations all at once. They would start at a low pump rate and increase the rate in increments, to push the sand out of the casing slowly. If they intend to pump at 20 bpm, they may start at 5 bpm, increase to 10 bpm, increase to 15 bpm, and then go to the 20 bpm. This incremental pump rate increase also increases the amount of time on location. Another option that some of the new sleeves provide is the capability to be reclosed. This feature can be used for refracturing purposes or during the primary frac job.
Hi Gent Another technique with sleeves, where these sleeves are ball operated, so just a ball dropped from the surface; sleeve open and perform normal Frac without coiled tubing.
Hi Aaron, What are the criterions or parameters that direct the companies to choose between ball drop, PnP, or sliding sleeves as a completion?
Hi Nour. That's a great question with a complicated answer. Some of the key factors to consider are the cost of the completion and the efficiency during the frac job. Another consideration is whether the completion impacts production by using single-entry points to fracture through ( ball-activated and coiled-tubing-activated sleeves), or multiple-entry points (cluster perforating with PNP) to fracture through. Executing the fracturing operation through single- or multiple-entry points could have an impact on production and ultimate recovery. This subject is highly debated and there are operators and service companies on both sides of the argument.
The PNP completion system only requires casing and cement to install the system, so it is the cheapest to install. I believe that the low upfront cost of the PNP system is a large reason why the US market has seen a shift to PNP completions in the downturn.
What are you seeing in the Canadian market?
Hi Aaron, just wanted to know if the first CTACS with SJP is also known as "Jetting and Frack". I cant seem to find much info using this denomination.
Joaquin Ruggeri it sounds like it is the same thing. I can’t say for sure though, because I’ve never heard it called “jetting and frac”
hi .. i just want to know why to inflate the packer if i want to pump the sand out .. wouldent that let sand get between the packer and casing and mite end up in a stuck situation ? regards
Hi Ahmad. Just to clarify, this is not an inflatable packer, it is mechanical-set and/or hydraulic-set. You have to set the packer to isolate from the previously fractured stage and divert the fluid into the intended sleeve. Check out the video around the 4:50 time frame to learn how to recover if the assembly does get stuck.
What is the purpose of this technique with the frac sleeves if you can do the same thing without them? What's the advantage of having the frac sleeves there?
Hi Nick. There are several advantages to having the sleeves. The primary advantage is the time saved from sand-jet perforating each stage. For example, if you're doing 50 stages and it takes 15 minutes to sand-jet perforate each stage, that would require 12.5 hours of sand jetting time. Also, prior to perforating through the casing all of the sand from the perforating piles up in the casing. When using the sand-jet perforator, the operator has to ease into the frac job or they run a high risk of screening out due to pushing the excess sand out of the perforations all at once. They would start at a low pump rate and increase the rate in increments, to push the sand out of the casing slowly. If they intend to pump at 20 bpm, they may start at 5 bpm, increase to 10 bpm, increase to 15 bpm, and then go to the 20 bpm. This incremental pump rate increase also increases the amount of time on location.
Another option that some of the new sleeves provide is the capability to be reclosed. This feature can be used for refracturing purposes or during the primary frac job.
Hi Gent
Another technique with sleeves, where these sleeves are ball operated, so just a ball dropped from the surface; sleeve open and perform normal Frac without coiled tubing.
@@AaronBurton I think another advantage of these sleeves is to help correlate the CT depth. Right?
For Coiled Tubing Equipment, you can raise an Inquiry to www.goes-well.com