High Initial Flow Rates--Can They lead to Lower Recoveries?
While this has been discussed before, I think it is important to note that some operators including Petrohawk, think a more conservative early flow rate will preserve permeability. Within their test set of wells are high flow rate wells sitting right next to much lower, restricted flow rates. Personally, I would rather my acreage be sitting underneath the restricted flow rate well. Anyone agree or disagree? Below is Petrohawks recent announcement.
Jay
The Company has also extended its testing of an experimental production practice that could further improve reservoir performance. Â As a follow up to a four-well test in various areas of the field that was initiated in July 2009, a second set of wells are being produced on smaller chokes, resulting in higher flowing pressures and reduced production rates. Wells included in the test are "sister" wells, geographically and geologically, to existing wells on production at a normal choke, typically 24/64". The objective in extending the sample set of test wells is to determine if additional reserves can be produced from each well by greatly reducing the rate of drawdown in bottom hole flowing pressure, thereby reducing the possibility of permeability loss as a result of the rapid drawdown of pressure.
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Replies to This Discussion
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Permalink Reply by Henry on -
Agree. As long as interest rates are low and inflation is low, I'm patient to give up some money now, for more later. (Especially if gas prices are higher in the future.)
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Permalink Reply by Thomas Wright on
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It will be interesting to see what the results are. One question is were all the wells in the test completed by the same procedure? I am hearing that ceramic proppant is in short supply and it is the preferred choice for this reservoir. However, some companies are using resin coated sand which over time as the reservoir starts to close will crush the sand, hence, lower production.
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Permalink Reply by P.G. on
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Could various flow rates from similar chokes result from fracing success?
Like in some fracings breaking up the shale better than other attempts, etc. allowing more gas to be freed?
Do they ever re-frac to free up more gas?
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Permalink Reply by Les Bamburg on
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Thomas, many operators evaluated ceramic proppant -vs- resin coated sand early in the development and stated the resin coated sand provided sufficient strength.
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