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1. WO2020117085 - PROCÉDÉ DE TRAITEMENT DE FRACTURATION HYDRAULIQUE MULTICOUCHE AVEC AJUSTEMENT EN TEMPS RÉEL

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

[ EN ]

CLAIMS

What is claimed:

1. A method for treating of subterranean formation, comprising:

(1) selecting a wellbore for a multilayer hydraulic fracturing treatment, creating an initial job design for the multilayer hydraulic fracturing treatment, setting one or more fracturing job criterion, and generating a model of tube wave propagation in the wellbore based on the initial job design;

(2) initiating a portion of the initial job design;

(3) generating one or more tube waves in the wellbore and monitoring one or more reflections of the one or more tube waves, and calculating a number of open fractures and fracture geometry parameters with the model of tube wave propagation;

(4) performing real-time evaluation of the fracture geometry parameters by:

estimating one or more pumping flow rates into the number of open fractures; and simulating a fracturing process for the number of open fractures using a multilayer fracturing simulator;

(5) adjusting the multilayer fracturing simulator until the number of open fractures, one or more pumping flow rates, and fracture geometry parameters from stage (3) coincide with the real-time evaluation of the fracture geometry parameters from stage (4) to generate an adjusted hydraulic fracturing simulator;

(6) calculating the fracture geometry parameters with the adjusted hydraulic fracturing simulator to generate a measured job design;

(7) calculating the difference between the initial job design and the measured job design; and

(8) performing one of:

verifying that the difference from stage (7) is below an assigned variance for the one or more fracturing job criterion and continuing the initial job design; or

updating the initial job design and repeating stages (6) and (7) until the difference from stage (7) is below the assigned variance for the one or more fracturing job criterion and continuing with an update of the initial job design; and

(9) repeating stages (3) to (8) until the multilayer hydraulic fracturing treatment is completed.

2. The method of claim 1, wherein the model for tube wave propagation comprises a parameter of wellbore reflectivity.

3. The method of claim 1, wherein the fracturing job criterion is the total amount of proppant placed into all fractures.

4. The method of claim 3, wherein a number of stimulated fractures in the multilayer hydraulic fracturing treatment differs from the initial job design.

5. The method of claim 1, wherein the fracturing job criterion is a specific amount of proppant in each fracture.

6. The method of claim 5, wherein a number of stimulated fractures in the multilayer hydraulic fracturing treatment differs from the initial job design.

7. The method of claim 1, wherein the multilayer fracture simulator is a model selected from the group consisting of: Khristianovich-Geertsma-de Klerk (KGD) model, a Perkins-Kem-Nordgren (PKN) model, a radial model, a pseudo 3D model, a planar 3D model, and a full 3D model.

8. The method of claim 1, wherein the model of tube wave propagation determines a number of open fractures in the wellbore and one or more fracture geometry parameters selected from a group consisting of fracture depth, fracture length, width, and height.

9. The method of claim 1, wherein the monitoring of reflected tube waves is performed by a pressure sensor at the wellhead of the wellbore.

10. The method of claim 1, wherein the monitoring of reflected tube waves is performed by one or more distributed pressure sensors in the wellbore.

11. The method of claim 1, wherein monitoring one or more tube wave reflections in the wellbore comprises using real-time monitoring.

12. The method of claim 1, wherein real-time evaluation is performed through modeling a slurry flow into the wellbore to calculate the flow rate distribution among multiple fractures.

13. The method of claim 1, wherein simulating a fracturing process for the number of open fractures using a multilayer fracturing simulator comprises evaluating one or more fracture geometry parameters.

14. The method of claim 1, wherein adjusting the multilayer fracturing simulator comprises adjusting one or more job parameters selected from a group consisting of: pumping flow rate, proppant concentration, proppant size, fiber additives, fluid type, and fluid additives amount.