well placement

[softgeek]

hello guys,

i just have a question confusing me which is on what basis we decide the well spacing (well position in the field), in other words; well placement depend on what?? i welcome any suggestion from you guys

gracias

[vinomarky]

Wherever you think you'll make the most money.... Depends on many many things, including but not limited to;
Permeability, heterogeneity/continuity, pressure, mobility ratio of your fluids, relief, aquifer strength and direction, assumptions of product price over time, corporate discount rates, projected OPEX and CAPEX for the various scenarios, logistical constraints... to name but a few.

Optimal field development is a very complex and highly interdependent problem - If you are new to it, start with an analog development plan to your field, work out the NPV, then play what-if's - what if you drilled double the well density? Half the well density? Different locations? Different artificial lift methods? Different well geometry? Different development plan (ie liquids stripping first then gas production, primary production followed by injection) etc etc... NPV/IRR out all the various scenarios, factor in other issues such as capital/liquidity constraints over time and risk and you'll start to come closer to understanding what your best plan may be.....

To cut a long story short - don't fixate on well spacing in isolation... it has knock-on effects

[Shakespear]

As vinomarky pointed out there are many factors, but the bottom line is MONEY. You really need to look at things closely.

1) Where is the field? The "where" refers not just to land/sea but also terrain. I will not develop this more but it is important as in the end when you put a dot on that map you may find that it will not be that simple to drill on that spot.
2) Where are the facilities. pipelines etc ?
3) How much will you be producing from these wells? This will decided what you can and can not do on surface. Money is the issue.

This is a global optimization problem which the average engineer will not be doing in the rigorous mathematical form. Usually he/she will chose a locations , look at results , locations are changed, results are looked at, ......... then from the results and trends the best case chosen.

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From purely reservoir engineering take a look at Fig. 10 and 11. Here the problem is where to put injectors and producers optimally. We do not know everything underground so the paper is doing an idealized problem which still shows you the issues involved when doing this the rigorous way, mathematically.

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The mathematical ways are "guided" to automate the search process.

Not a Simple Problem

[softgeek]

very much thanks for the infos...

[Chaly]

Thanks for the information

[temr]

There was discussion of this previously.
Look the forum