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1. (WO2019005776) DOWNHOLE INTERVENTION OPERATION OPTIMIZATION
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CLAIMS

What is claimed is:

1. A method for generating an intervention program for a downhole formation (400, 500, 600), the method comprising:

collecting mud-logging data during a drilling operation, wherein the drilling operation forms a borehole (404, 504, 604) through the formation (400, 500, 600);

generating zone characterization of one or more zones along the borehole (404, 504, 604) based on the collected mud-logging data;

defining targeted zones (310, 410, 510, 610) of the one or more zones along the borehole (404, 504, 604);

generating a treatment characterization for each targeted zone based on the collected mud-logging data; and

generating an intervention treatment design based on the targeted zones (310, 410, 510, 610) and associated treatment characterizations.

2. The method of claim 1, further comprising performing an intervention operation based on the intervention treatment design, preferably, wherein the intervention operation is one of an acidizing operation, a fracturing operation, or a non-acid mud removal treatment.

3. The method of any preceding claim, wherein each zone within the formation (400, 500, 600) has a unique geologic property and wherein the treatment characterization is based on the geologic property of the respective targeted zone, preferably, wherein the geologic property comprises as least one of porosity, permeability, density, rock property, and fluid property.

4. The method of any preceding claim, wherein the zone characterization comprises at least one of information related to mineralogy, elements, solubility,

compatibility, permeability, natural fractures, saturation, and rock mechanical properties.

5. The method of any preceding claim, wherein the mud-logging data is obtained from at least one of gas and fluids generated during the drilling operation, cuttings from the drilling operation, and drilling data associated with the drilling operation, preferably, wherein the gas and fluids portion of the mud-logging data includes volumetrics indications, permeability indications, saturations indications, and porosity indications, and/or, wherein the cuttings portion the mud-logging data includes mineralogy, element quantification, clay expandability, and rock texture, and/or, wherein the drilling data portion of the mud-logging data includes rate of penetration, hole size, mud weight, and fluid type.

6. The method of any preceding claim, wherein intervention treatment design comprises a plurality of stages, (418, 420, 422, 424, 426, 428, 518, 520, 522, 524, 526, 618, 620, 622, 624, 626) wherein each stage is associated with a targeted zone, the plurality of stages (418, 420, 422, 424, 426, 428, 518, 520, 522, 524, 526, 618, 620, 622, 624, 626) arranged to perform an intervention operation on the associated targeted zone (310, 410, 510, 610).

7. The method of claim 6, wherein each stage has a length equal to a length of the associated targeted zone.

8. The method of claim 6 or claim 7, wherein each stage is designed based on the zone characterization of the associated targeted zone.

9. A system for generating an intervention program for a downhole formation (400, 500, 600), the system comprising:

a drill string (20) operable within the downhole formation (400, 500, 600) to drill a borehole (404, 504, 604) through the formation (400, 500, 600); and

a control unit (40) arranged to control the drill string (20) and configured to:

collect mud-logging data during a drilling operation;

generate zone characterization of one or more zones along the borehole (404, 504, 604) based on the collected mud-logging data;

define targeted zones (310, 410, 510, 610) of the one or more zones along the borehole (404, 504, 604);

generate a treatment characterization for each targeted zone based on the collected mud-logging data; and

generate an intervention treatment design based on the targeted zones (310, 410, 510, 610) and associated treatment characterizations.

10. The system of claim 9, wherein intervention treatment design comprises a plurality of stages, (418, 420, 422, 424, 426, 428, 518, 520, 522, 524, 526, 618, 620, 622, 624, 626) wherein each stage is associated with a targeted zone (310, 410, 510, 610), the plurality of stages (418, 420, 422, 424, 426, 428, 518, 520, 522, 524, 526, 618, 620, 622, 624, 626) arranged to perform an intervention operation on the associated targeted zone (310, 410, 510, 610).

11. The system of claim 10, wherein each stage has a length equal to a length of the associated targeted zone.

12. The system of claim 10 or claim 11, wherein each stage is designed based on the zone characterization of the associated targeted zone.

13. The system of any of claims 9-12, wherein each zone within the formation (400, 500, 600) has a unique geologic property and wherein the treatment characterization is based on the geologic property of the respective targeted zone.

14. The system of any of claims 9-13, wherein the zone characterization comprises at least one of information related to mineralogy, elements, solubility, compatibility, permeability, natural fractures, saturation, and rock mechanical properties.

15. The system of any of claims 9-14, wherein the mud-logging data is obtained from at least one of gas and fluids generated during the drilling operation, cuttings from the drilling operation, and drilling data associated with the drilling operation.