₦airaland Forum

shakaz:
Please do you have any place in port harcourt

Ekeoms:
I also need info abt the nlng screening exercise i was also shortlisted to write on 12th january

beetle24:
Hello, please am a computer science 300lv student of Adekunle Ajasim Uni(AAUA),will be going for IT February 2017. I need help on place to acquire experience in telecommunications Akure or Lagos preferably. Thanks, u can contact me on 07030872102.

kingsley3218:
oga.......that is the biggest mistake u've made.....i'm sorry but you have to wait till the next batch when the registration portal would be open again. Do not try this next time.

petengine:
How can I rectify thumbprint issues?

Due to network challenges during the day, I had someone did my registration in the midnight using his email and thumbprint.

I heard in camp I will have to verify my thumbprint, please how do I rectify this issue before camp next month or in the camp.

Thanks for your good response in advance.

eimuhb:
To answer the question, dual string would be a preferred option for this scenario

ifoundmyperfect:
1 seem like a waste of time.

2 appears to be imperfect. Producing through casing may negatively impact flowing and wellhead pressure while the remaining two completions sound reasonable.

3; Using three tubings is not a common practice because of the limited size of ID of casing

In my own opinion, I think using two tubings to target two completions and putting the third completion behind sleeve in which you open later when you are through with one of the two completion below.

So for the late response. Next time if its so urgent, please send an email.

MoyoGENERAL:
Most times we don't use best design but OPTIMUM design for the specific target zones. Having said this, there are so many other factors to consider before selecting which completion strategy to employ to produce the hydrocarbon in the zones.
Cost, available technology, outcome of drilling challenges, HC properties, completion material integrity, etc. Nevertheless, I will try to analyze the 3 different scenario, state there pros and cons.

Single String: This is more or less the best option among the three, offering a more conservative measure towards field development. No much technology is required, cost-wise it's tolerable, however, in the long run, you spend more years producing from the reservoirs, thereby increasing your OPEX over the years, ultimately affecting your NPV. In term of safety, it's better too, cos of less corrosion outside the tubing and inside the casing due fluid production. Aside from all these, most times drilling is plagued with several challenges, where you have to use multiple intermediate casings, hence reducing the ultimate size of tubing to be used for completion, in a case where you've drilled in a troublesome interval( salt, high pressure, swelling shale), the allowance you may have for a tubing may not be up to 5.5 inches. Now imagine putting two 2.375 inches tubing in that with tolerance limits, it is almost impossible and unsafe. In this case the best is a single string( may be 3.5 inches) to deploy and produce the HC.

Dual string: Yes, this is good if less drilling problems were encountered while drilling impacting hole tolerance. Aside from the CaPEX of additional tubings and other surface networks, you tend to recover your HC faster meaning less OPEX in the long run. But to judge from the standpoint of economics, you will still have to consider other factors too like the amount of HC recoverable with the additional costs of the completion materials with there depreciation etc.. However from a rough quick view, this should yield more NPV for a robust reservoir. Nevertheless, the technology here is higher and complexities can abound downhole in terms of materials integrity due to tubing corrosion, more safety issues may abound especially due to pressure build up behind tubing for the reservoir at the top where HC is produced via the casing-tubing annulus, a gas flow can even be more dangerous to the wellhead.

Triple String: 3 tubings! Configuration complex than that of single and dual string. And believe me, the less complex your well, the better! Most Production Technologist will agree. I haven't seen this sha, cos it's not common due to the fact that final hole size after the drilling campaign may not allow such bearing in mind tolerance limits and opportunity to install other download equipments. The safety issue here is the fact that packer integrity will be susceptible to continual compromise, and there is high tendency of underproduction from one of the pay zone. Imagine a pay zone with a good productivity index, no near well bore damage, good permeability even in darcies, yet the maximum tubing size you can use is 2.375 inches just because you want to produce 3 at same time, when sensitivity study is indicating to you that you can increase tubing size and get more production. The key issue here will be the complex production system and difficulty during workovers( when need arises)


You know these are just brisk analysis. As a PTECH, I can choose to use a single 3.5 inches tubing and perform sensitivity analysis to see how well I'll produce in terms of well deliverability, choose an optimum flow rate at each phase during HC production in the different pay zones. This might even be better than using three 2.375 inches tubing differently yet simultaneously to produce from the 3 zones. So aside from all the cost, economics, tech, it's also the work of the P-Tech who will manage his baby all through the (well) lifecycle and see what's best for it.

For me, I'll advice you to to stick with SINGLE String. However it still depend on other factors listed here and even not listed here to ensure robust decisions are made as regard the optimum completion plan.

I hope this helps.

Shalom

Toluwani113:
I'll be glad if you can give me the tips

kenneyyice:
pls, how can i follow up my application is it by sending more application??.. pls elaborate

thanks in advance...

kenneyyice:
hello everybody!, pls i just want to ask a question about sending IT letter through NIPOST

HOW CAN ONE ASCERTAIN THAT HIS OR HER LETTER HAS REACHED THE HUMAN RESOURCE MANAGER OF A COMPANY?
URGENT ANSWERS PLA [color=#006600][/color]

haftob:
Pls I need the link to the HRM cos they're no more accepting application in dia Lagos office, I was told to send it to a staff who will serve as a referee and the person will also submit the application on my behalf.

Kristofferson:
Pls who can post the one of Exonmobil here . I mean their application procedures.

@Akby

An0nimus:
akby can you share the mailing address of the companies you sent mails too? I could do PMs if you want. I have someone looking for SiWES. Thanks