FAST SCREENING OF HYDRAULIC FRACTURE AND RESERVOIR MODELS CONDITIONED TO PRODUCTION DATA
A method involves obtaining a measured drainage function for a well and obtaining a set of drainage models, wherein each drainage model includes a reservoir model and a fracture model. The method also includes, for each drainage model, forming a predicted drainage function based, at least in part, on the drainage model, and determining a misfit value based, at least in part, on the predicted drainage function and the measured drainage function. The method further includes determining a set of candidate drainage models based, at least in part, on the misfit value for each drainage model, wherein each candidate drainage model comprises a candidate reservoir model and a candidate fracture model.
1 . A method, comprising:
obtaining a measured drainage function for a well;
obtaining a set of drainage models, wherein each drainage model comprises a reservoir model and a fracture model;
for each drainage model:
forming a predicted drainage function based, at least in part, on the drainage model, and
determining a misfit value based, at least in part, on the predicted drainage function and the measured drainage function; and
determining a set of candidate drainage models based, at least in part, on the misfit value for each drainage model, wherein each candidate drainage model comprises a candidate reservoir model and a candidate fracture model.
2 . The method of claim 1 , wherein forming a predicted drainage function comprises simulating a connected volume using a fast marching method solution to an eikonal equation.
3 . The method of claim 1 , further comprising determining, for each candidate model, a preferred drainage model based on a reduction of the misfit value caused by perturbing of the candidate fracture model.
4 . The method of claim 3 , further comprising performing full-physics pressure-transient/rate-transient simulation using the preferred drainage model.
5 . The method of claim 1 , wherein determining the set of candidate drainage models comprises comparing the misfit value of each drainage model with a tolerance value.
6 . The method of claim 5 , wherein the tolerance value is a predetermined value.
7 . The method of claim 5 , wherein the tolerance value is selected based on a range of the misfit values.
8 . The method of claim 3 , wherein determining, for each candidate model, a preferred drainage model based on a reduction of the misfit value comprises applying a machine learning network.
9 . The method of claim 4 , wherein performing full-physics pressure-transient/rate-transient simulation comprises determining an uncertainty for the drainage model.
10 . The method of claim 1 , wherein the fracture model comprises a plurality of fracture models each describing one of a plurality of hydraulic fractures intersecting the well.
11 . The method of claim 1 , wherein the well comprises one or more wells.
12 . The method of claim 1 , further comprising:
determining a spacing of hydraulic fractures in an adjacent well; and
generating hydraulic fractures at the spacing.
13 . A non-transitory computer-readable medium storing instructions, the instructions, when executed on a processor, comprising functionality for:
receiving a measured drainage function for a well;
obtaining a set of drainage models, wherein each drainage model comprises a reservoir model and a fracture model;
for each drainage model:
forming a predicted drainage function based, at least in part, on the drainage model, and
determining a misfit value based, at least in part, on the predicted drainage function and the measured drainage function; and
determining a set of candidate drainage models based, at least in part, on the misfit value for each drainage model, wherein each candidate drainage model comprises a candidate reservoir model and a candidate fracture model.
14 . The non-transitory computer-readable medium of claim 13 , wherein forming a predicted drainage function comprises simulating a connected volume using a fast marching method solution to an eikonal equation.
15 . The non-transitory computer-readable medium of claim 13 , further comprising determining, for each candidate model, a preferred drainage model based on a reduction of the misfit value caused by perturbing of the candidate fracture model.
16 . The non-transitory computer-readable medium of claim 15 , further comprising performing full-physics pressure-transient/rate-transient simulation using the preferred drainage model.
17 . A system, comprising:
a well testing system, to determine a measured drainage function; and
a computer processor, configured to:
receive a measured drainage function for a well;
obtain a set of drainage models, wherein each drainage model comprises a reservoir model and a fracture model;
for each drainage model:
form a predicted drainage function based, at least in part, on the drainage model, and
determine a misfit value based, at least in part, on the predicted drainage function and the measured drainage function; and
determine a set of candidate drainage models based, at least in part, on the misfit value for each drainage model, wherein each candidate drainage model comprises a candidate reservoir model and a candidate fracture model.
18 . The system of claim 17 , wherein the computer processor is further configured to:
determine a spacing of hydraulic fractures in an adjacent well; and
generate hydraulic fractures at the spacing.
19 . The system of claim 17 , wherein the computer processor is further configured to determine, for each candidate model, a preferred drainage model based on a reduction of the misfit value caused by perturbing of the candidate fracture model.
20 . The system of claim 19 , wherein the computer processor is further configured to perform full-physics pressure-transient/rate-transient simulation using the preferred drainage model.