Saudi Arabian Oil Company

Mohammad K Aljishi

Hussien A Alzaki

Fuad A AlSultan

Keshabananda Baruah

A system for selective fluid treatment of formation areas to remove formation damage may include an access module configured to access log data associated with a well. The system may include one or more hardware processors configured to identify a formation area as a treatment candidate area based on at least one of a permeability value associated with the formation area or a porosity value associated with the formation area. The one or more hardware processors may be configured to determine, based on reservoir modelling, a current depth of invasion value associated with the formation area, determine a volume of drilling mud buildup in the formation area based on the current depth of invasion value, and determine a treatment fluid volume value that identifies a volume of treatment fluid for application to the formation area to remove the formation damage from the formation area during a formation damage removal process.

Volumetric treatment fluid distribution to remove formation damage

A method includes deploying a bottom hole assembly downhole into a wellbore lined with a casing. While the bottom hole assembly is deployed downhole, the bottom hole assembly is used to: place a guiding profile within the wellbore casing, wherein the guiding profile is structured to physically guide a downhole drill in a direction different from that of a longitudinal axis of the casing; cut a window in the casing with a laser cutter; and withdraw at least one cut portion of the casing away from the window. A related bottom hole assembly includes: a laser cutter for cutting a window in a wellbore casing; a withdrawal mechanism for withdrawing at least one cut portion of the casing away from the cut window; and a releasable guiding profile structured to physically guide a downhole drill in a direction away from the wellbore casing.

Sidetracking operation via laser cutting

A method may include obtaining a real-time petrophysical data derived from a plurality of well logs during drilling and utilizing the real-time petrophysical data to quantify a formation damage profile using a resistivity tornado chart and a wellbore modeling. The method further includes utilizing the resistivity tornado chart to determine a depth of invasion inside a formation at each depth in a wellbore by using ratios between different resistivity logs obtained while drilling and creating a synthetic wellbore model by using a fluid flow equation for the wellbore modeling and calculating a time-specific invasion profile to determine a condition at a flowback time. The method further includes performing a computational fluid dynamics investigation in order to identify invaded fluid flow characteristics from the formation to the wellbore and calculating a duration needed to flowback an obtained invaded volume for removal of the formation damage based on a fluid flow behavior.

Method and system based on quantified flowback for formation damage removal

A sidetracking method includes lowering a sidetrack assembly to a target zone of a wellbore comprising a casing. The sidetrack assembly comprising a cutting tool coupled to a wellbore string and a whipstock releasably coupled to the cutting tool. The method includes setting the whipstock on a wall of the wellbore, pulling the wellbore string, decoupling the cutting tool from the whipstock, actuating the cutter, cutting along a cut profile of the casing to cut free a portion of the casing at the target zone, actuating the mechanical fasteners, fastening the portion of the casing to the cutting tool, pulling the wellbore string, detaching the portion of the casing from the wall of the wellbore, drilling, with a directional drill string a sidetrack wellbore extending from the window to a downhole location of the sidetrack wellbore, and removing the whipstock from the wellbore.

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Alqatif, Saudi Arabia

Mohammad K Aljishi