15 replies to this topic

[SenOil]

Hi all,

can someone tell me

how a gas compressor can help to produce more volume cubic feet into a well than a normal situation ie how the compressor reacts with the well reservoir? by increasing the stactic pressure or flowing pressure?


thank you

Edited by SenOil, 22 October 2012 - 12:04 PM.

[Art Montemayor]

You are posting in the Industrial Forum and I normally would presume you are a graduate Chemical Engineer or another engineering profession. However, your questions are so basic and elementary, that I have to ask what your background in engineering is. Please be frank so that we can address and respond to your questions in the correct context.

Do you have any knowledge or basic training in the upstream hydrocarbon production field? This has to do with the production, separation, treatment, and transport of oil and gas produced from hydrocarbon reservoirs. If you have no background preparation or training in this area and you require detailed information on the processes and operations involved, then the best thing for you to do is to obtain the basic instructions on this industry in order to understand the responses you would receive from our Forum members to your questions.

[ankur2061]

SenOil,

It would be like writing 20 pages of lecture notes on natural gas compression which I am sure you do understand would be difficult to put it down as a forum post reply. You can refer to the following links:

http://en.wikipedia..../Gas_compressor

http://www.naturalga...s/transport.asp

http://www.scribd.co...on-Fundamentals

Regards,
Ankur

[SenOil]

To Art Montemayor I know the basic about gas process, im graduated in electro-mechanical engineer i just want know how to make a choice to implement a compressor in gas field what is the step to follow for implementing gas compressor project in oil and gas field!! thats my real questions! thanks again for your help.

to Ankur many thanks for your reply.

[SenOil]

Thanks ankur for the links, I already know these links in fact what i would like to know is about the thermodynamic cycle into the gas well during the compression how P,V,T evolute and then understand the benefit of compression for the gas well to produce more gas.

To Art Montemayor if you can help me to better understand thanks too!!

[Art Montemayor]

Senoil:

Under normal situations, oil and gas are produced from a pressurized oil or gas reservoir. Gas that is produced together with crude oil is called “associated” gas and this gas is produced at a pressure lower than the reservoir’s because the pressure is reduced in order to separate the crude oil liquids from the associated gas. The separated produced gas has to be treated and processed in order to transport it to a marketplace for sale as natural gas. Depending on the resulting process pressure of the gas, it may have to be compressed in order to subject it to long distance pipeline transport. The compression step is done to give the gas the necessary driving force that allows it to overcome pipeline flow resistance.

Sometimes, there occurs a pure gas well where there is no crude oil liquids involved in the production. These gas wells often tend to have a relatively high reservoir pressure and consequently may not require mechanical compression for pipeline transport. However, should the well deplete its pressure or if the well pressure is not enough, then a compressor is used for transport purposes. The need for ensuring that the transported gas is free of condensable hydrocarbons as well as water moisture is also important for a pure gas well. Typical components in a gas well may be methane, ethane, propane, butane, and some pentane. The gas mixture is normally saturated with water. In order to have natural gas suitable for transport, the majority everything except the methane has to be removed prior to entering the pipeline. In order to remove these components and to transport the product methane, compression is usually required.

There are different types of compressors available for compressing natural gas. The type and driver used depend on the quantity of gas to be compressed and the differential pressure required to be added. Sometimes there is no “choice” to make in applying a compressor on a natural gas stream. The gas may not require a compression step. It all depends on the situation in the field. To continue to try to address your concerns it is far easier if you present your field scenario of gas production and your requirements for the product gas. That way we can discuss what you have to do. It is impossible to read your mind and visualize all the possible scenarios that you are contemplating on resolving with a gas compressor.

Our forums are not meant to teach chemical or process engineering. Universities do that.

[SenOil]

Thank you Art Montemayor for your reply but I already know about your answer what im trying to get is following my previous message see below quoted message is about thermodynamics concerns again thankx

Thanks ankur for the links, I already know these links in fact what i would like to know is about the thermodynamic cycle into the gas well during the compression how P,V,T evolute and then understand the benefit of compression for the gas well to produce more gas.

To Art Montemayor if you can help me to better understand thanks too!!

[SenOil]

Art for your information im currently an intern and being trained in gas production process.
sorry again if i make you annoy.

[SenOil]

Ankur, Art,
here is my process datas regarding the compression
Case Requested Conditions Design Point
Suction Pressure min/normal/max PSIG 200/650/900 200/650/900
Suction Temperature deg C 80 80
Discharge Pressure min/max PSIG 1100/1200 1100/1200
Package Outlet Temperature deg C - 51
Capacity min/normal/max MMSCFD 1.5 /3.0 /4.5 1.5 /3.0 /4.5
Horsepower required Bhp not know not know

here is data s regarding 10 well production capacity with and without compression

Well FTP Current Capacity Compressed Capacity
psi Nm3/day Nm3/day

GD-2 789 23000 23000
SA-1 1425 300 300
SA-2 1570 54000 54000
SA-3 820 16000 20000 (compressed)
SA-3a 680 14000 30000 (compressed)
SA-3b 740 29000 30000 (compressed)
SA-4 0 0000 15000 (compressed)
SA-4a 640 0000 0
SA-5 700 2000 15000 (compressed)
SA-6 850 7000 20000 (compressed)

Total 145,300 m3/day 207,300 m3/day (compressed)

below is the current situation without compression
the total pipeline length is about 34 km and OD is 4 inches schedule 80 departure line pressure is 640 psi and arrival line pressure is 400 psi, and the total production capacity is about 145,000 Nm3 .
we want in a short term a least to reach 200,000 Nm3/day by using a compressor and have an arrival line pressure @ 600-700 psi does it make sense?? or if any additional information's are needed please let me know

many thanks to all

[SenOil]

<p>Ankur, Art,</p>
<p>here is my process datas regarding the compression<br />
Case&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Requested Conditions&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp%

[Bobby Strain]

Seems to be much confusion. Do you have access to a process simulator?

Bobby

[SenOil]

unfortunately i dont have a process simulator!!
the datas have been moved when i post it into the forum, the espace between the title and the values was deleted and thats make quite difficult to understand the text, if you have an emai adress i can send you datas in good format
thx

[Art Montemayor]

SenOil:

Please look at the attached Excel workbook to see how your well data looks when it is presented in a simple spreadsheet. This is the way tabular data is presented and organized.

I can't make out the rest of your data presentation, or otherwise I would organize that also. Surely you have access to a spreadsheet and can organize your data similarly.

Attached Files

•  Well Data.xlsx   10.68KB   38 downloads

[SenOil]

Art,

thank you for the interest you showed towards my inquiries i built an excel document with all datas that i previously posted to you
please see attached well data file and tell me what do you think about
many many thanks

Attached Files

•  Well Data.xlsx   15.85KB   28 downloads

[ankur2061]

SenOil,

The spreadsheet you have provided and the "Statement of Requirement" that you have made in the spreadsheet is like a brief concept note which needs to be developed into a FEED (Front End Engineering Design) package for increased production and transportation from well clusters which includes primary separation of bulk liquids, gas compression and pipeline transport. 4" is your current size and it may not be economical to push 200,000 Nm3/day from the previous 145,000 Nm3/day unless proper hydraulic calculations are done for the 34 km pipeline. The 4" line size may require complete evaluation not only from pressure drop point of view but also from pipeline mechanical integrity point of view. Other engineering aspects that need to be reviewed are pipeline depressurization at a much higher pressure due to compression and it's effect on the operating temperature of the pipeline and in turn it's impact on the design tempertaure of the pipeline. So many engineering aspects need to be reviewed for such a debottlenecking exercise.

And you are asking for a FEED package to be provided to you in the forum. Don't you think it is too much to ask for in a forum post. If you have not been involved in doing FEED or any design engineering activities before, my advice would be to get in touch with an engineering consultant and ask them to provide you a FEED package which subsequently can be used by an EPC contractor to implement the debottlenecking project.

This is how most projects are planned, engineered and executed. This is not to discourage you in any way but that is the way it has and always will be done and not through a question-answer session on a chemical engineering forum such as "Cheresources".

Regards,
Ankur.

[SenOil]

Thank you very much Ankur,
yes you are absolutely right the reason I post this to this forum was just to have an idea about what experts like you think about prior we begin with this project.
yes for sure my management will contact an EPC contrator for this need.

many thanks