Method and apparatus for acid stimulation
AssigneeConocoPhillips Company
InventorsJan Ove SOERHEIM, Maxim PROSVIRNOV, Elizabeth R. MATHIS, Tollef SVENUM
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Abstract
The invention relates to a method and apparatus for performing acid stimulation of a hydrocarbon well (1), especially in a multi-lateral branched well system. In the first lateral (8), after installation of the production liner (9) with ball-activated completion equipment (10), acid stimulation is performed through drill string (21) which is introduced into the well and which seals with the production liner (9) by means of a stinger (22) and polished bore receptacle (23) before introduction of acid.
Claims16
A process for completing a subsea hydrocarbon well, the process comprising:
- a) drilling through a hydrocarbon reservoir a producing section of a wellbore using a drilling assembly mounted to drill string;
- b) using a drill string, running production liner and ball-activatable completion equipment into the producing section of the wellbore;
- c) completing a first zone of the producing section by injecting stimulation fluid through the drill string and into a first portion of the production liner;
- d) dropping an actuating device through the drill string to open a second portion of the production liner and pass stimulation fluid into the second portion of production liner to complete a second zone of the well.
An apparatus for stimulation of a hydrocarbon formation, the apparatus comprising:
- (a) a production liner including activatable completion equipment and a female seal element, e.g. polished bore receptacle at the proximal end of the liner;
- (b) a drill string having a male seal element, e.g. stinger, at its distal end, the male seal element being complementary to the female sealing element and capable of sealing with the female sealing element;
- and (c) a pair of valves in an assembly at a proximal end of the drill string to enable an actuating device, such as a ball, to be introduced into the drill string.
Dependencies are inferred from the claim text.