Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
20 Cards in this Set
- Front
- Back
|
What is a slot and recovery operation?
|
It is a Combined workover/drilling operation were the completion is pulled and the well is P&A before setting a whipstock to do a sidetracking operation.
|
|
|
Why would you need a rat hole for a tubing conveyed perforation?
|
To provide a hole were you can drop the perforation gun after it have done its job.
|
|
|
what is the purpose of the washout tool?
|
purpose is to force the slurry into the open hole. The washout toll is connected to the crossover tool and fluid that is depleted with gravel travels ether into annulus above packer or into the void in between the wash pipe and screen
|
|
|
Why use orientated perforations?
|
Helps to decrease the sand production. Helps to perforate with the maximum stability. shoot the perforations in the direction of the maximum stress.
chance for failure is reduced |
|
|
What services tool are required to run gravel pack completion?
|
Wash pipe- recieves return flow from annulus
Gravel pack packer- Isolates lower completion section Production screen- keeps gravel from entering back into pipe Cross over tool- foces gravel from drillpipe into openhole annulus bull nose- protects screen when enetering the well. |
|
|
What gravel is coarser, 10/20 or 20/40?
|
10/20
|
|
|
What makes key stone slot screen better than a conventional slot screen?
|
The keystone slot reduces the chance of plugging of slots
|
|
|
How can selectivity in multiple zones be approached?
|
several strings
one string - intermitten flow from all wells multilateral well |
|
|
What affects the perforations?
|
Amount of explosives, distance between target and perforations, Target properties, shot density and phasing
|
|
|
what is well barrier?
|
It is a technical solution to avoid unintentional influx, cross flow or out flow to the environment
|
|
|
What does the activity regulations say about barriers?
|
States that there should be 2 independent barriers after the surface casing is set. If one barrier fails all activities are stopped and all focus shall be focused on re establishing the failed barrier.
|
|
|
Name three cost drivers in HPHT well operations
|
longer trip times, additional procedures, gas tight service ,heavier fluids.
|
|
|
Intermitten gas lift
|
is discontinuous injection gas to start wells or remove heavy liquid.
|
|
|
Self lift is?
|
when gas is drained from gas cap, used for continious gas lift downhole
|
|
|
conventional gas lift?
|
gas injected from annulus into prod tubing continiously to increase production
|
|
|
What is stagged displacement?
|
it is when parts of the well is displaced, in order to inhibit a high pressure loads as the result can be when displacing the entire well at once.
|
|
|
what is Indirect displacement?
|
This is when water is used as precursor before filling the well with completion fluid.
|
|
|
What OBM components does not exist in WBM?
|
Base oil, emulifier oil, wetting agents
|
|
|
WBM components that are not present in OBM
|
biocide, defoamers, lubricators, shale inhibitors
|
|
|
what is used as weight agent in low-solid oil based completion fluid?
|
BRINE
|
