Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Refrac Discussion (specifically for the Bakken, but open to any/all plays)

Refrac Discussion (specifically for the Bakken, but open to any/all plays)

Refrac Discussion (specifically for the Bakken, but open to any/all plays)

I'm looking for opinions on the different methods to refrac underperforming wells in the Bakken. Each well must be considered individually so I'll give you some details on the current well I'm looking at.
  • Drilled and completed in '08
  • Landed in the Three Forks
  • In some of the best acreage in the Bakken (nearby wells have EUR's with ~100,000-200,000 bbls more)
  • Short lateral in 640 spacing (~10,000' down with ~5,000' lateral)
  • 7" casing in vertical with 4.5" liner from 9,300' to the end of the curve ~10,500'
  • Lateral is open hole
  • Bull head frac (the good ole' pump & pray)
  • Used sand for proppant
It's still pumping out a decent amount of oil every day but in my opinion, this well has a lot of potential for missed pay. The poor and now outdated method used to stimulate it, along with the expected production from wells in this area make it a top candidate on my refrac list. The methods I've considered are:
  1. SurgiFrac. It's Halliburton's coil tubing stimulation that doesn't require plugs or packers to stimulate isolated zones. They basically pump clean rate down the backside and proppant/stim fluid down the coil tubing. Sounds great, but it's pricey and I have some reservations on its ability to seal off zones in an open hole
  2. Attempt to pull the liner in the curve, ream out the lateral, run jewelry in the hole and frac it conventionally. Could work, but it's pricey, and there's a possibility I won't be able to vibrate that liner loose.
  3. Set a whipstock, kickoff, drill a new lateral, run jewelry in the hole and frac it conventionally. It's the priciest of all options, would likely have the best results, but I'm not sure by what margin. How much will the current lateral affect the frac'ing of the new lateral right next to it? I'm not considering moving up to the Middle Bakken since that would affect future infill programs.
  4. Another bullhead frac basically. Pump a pad, followed by about 10 stages of proppant with slickwater sweeps. If pressure flat lines, keep increasing sand weight till I more or less screen out on that fracture and something else breaks. It's the cheapest method by far, doesn't require large workover operations before stimulating, and it's quick/easy. Not sure about the return, since I wouldn't be isolating any zones.
Any insight from someone with experience in refracs (succesful or not), or a push in the right direction would be much appreciated.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login


Research Report - How Engineers are Using Remote Access
Remote access enables engineers to work from anywhere provided they have an internet connection. We surveyed our audience of engineers, designers and product managers to learn how they use remote access within their organizations. We wanted to know which industries have adopted remote access, which software they are using, and what features matter most. Download Now
eBook - Managing the Context of Product Complexity Using the Digital Twin
Keeping track of changes to complex products is difficult—think Aerospace & Defense equipment, new generations of commercial aircraft, and software-based automobiles. A new way to managing the digital context of the physical product is required and the answer is the Digital Twin. This ebook explores the opportunity available for Operations and Maintenance for the Digital Twin. Download Now
White Paper - Trends in Industrial Filtration
Substantial progress has been made in filtration technologies in recent years. New filter media materials, designs and processes have led to filters that are more efficient, reliable, compact and longer lasting. This white paper will discuss the various trends that are impacting operational responsibilities of MROs today and the resources that are available for staying up-to-date on the latest filtration solutions. Download Now

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close