What is the MD at 6,000 ft TVD for a build, hold, and drop well (KOP, TVD & HD at end of hold, and build/drop rates will all be given).
This is a standard directional drilling problem; see Guidebook on 2 DRL 9 or TS2 (note TS12 doesn't have a good section here). First calculate r1 & r2 (2,865 ft); next calculate Theta1 & Theta2 (17.9 deg). Finally, use the MD equation and find the MD of each component of the vertical, build, hold sections:
MD = 1,500 + 895 + 3,803 = 6,198 ft or (C).
Note these equations are all in the GB or TS2; just plug-n-chug through them.
Hi David, I just had a quick question regarding short/medium/long radius wells. If I'm given the kick-off point MD and final MD where the well reached 90 degrees, how can I determine how to categorize the well? With the length of an arc and equation to determine q (deg/100ft), I keep getting the wrong answer. The problem is as follows: (#35 SPE 2005 Exam)
ReplyDeleteA well has a proposed kick-off point 12,000 ft MD (12,000 ft TVD) with 0 degrees of deviation and with a final proposed total depth of 13500 ft MD (12100 ft TVD) at 90 degrees of deviation. The 90 degrees of deviation was initially achieved at 12157 ft MD. Is this a short radius, medium radius, long radius, or extended reach well?
Go to the Guidebook. Look up 2 DRL (Drilling). Run down the list of options and you get "Directional" on 2 DRL 8. This should be your fist stop, 30 seconds. Let me know if you get it.
DeleteI'm sorry, I know I'm missing something simple but I still don't understand where those numbers come from. It seems they're predetermined, but I don't understand how 100-300 deg/100ft corresponds to a radius of 20-40 ft, or how to determine the radius from the problem in the first place
ReplyDeleteI don't remember this problem but it seems simple enough once you know the definitions. Look up each in your dictionary and study the Guidebook pictures on 8-9. You will need to understand what every term means for this exam and understand how it works.
DeleteFor this one, do we not use the theta2/q2 because its the same as theta1/q1? why don't we add that in?
ReplyDeleteOh nevermind. It is a build, hold, drop well, but it isn't asking us at first for the drop part, right? That's what 4 does.
ReplyDeleteHow do we find Theta without the equations provided in the GB or TS2? These equations are not provided in the exam reference guide.
ReplyDeleteHi Blake. Keep in mind the problem itself can give you anything, including equations, or give you enough to "figure out" how it works. So there really is no choice but to practice all sorts of problems to learn materials that are not in the reference. Of course, they can do whatever they want so who knows? All one can do is work the problems and learn the material.
Delete