Optimizing well operating plans

• US 8,914,268 B2
• Filed: 01/05/2010
• Issued: 12/16/2014
• Est. Priority Date: 01/13/2009
• Status: Active Grant

• Current Assignee: Exxonmobil Upstream Research Company (Exxon Mobil Corporation)
• Original Assignee: Exxonmobil Upstream Research Company (Exxon Mobil Corporation)
• Inventors: Dale, Bruce A., Ellison, Timothy K., Postl, Dieter, Chang, Dar-Lon, Hommema, Jennifer
• Primary Examiner(s): Shah, Kamini S
• Assistant Examiner(s): OCHOA, JUAN CARLOS
• Application Number:
  US13/133,895
• Publication Number:
  US 20110246163A1
• Time in Patent Office: 1,806 Days
• Field of Search: 703/10
• US Class Current: 703/10
• CPC Class Codes: E21B 43/00 Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells applicable only to water E03B

Abstract

Methods and systems for making decisions related to the operation of a hydrocarbon well include characterizing effective production capacity of a reservoir over space and time based at least in part on a reservoir potential and a near-well capacity; determining an optimized well potential over space and time relative to the characterized effective production capacity using a well model of a simulated well accessing the reservoir, which may be determined based at least in part on an objective function that considers at least one of a plurality of decision-making factors, such as one or more of operations costs, operational risks, and modeled production rates over the life of the well; and determining at least one well operating plan component that can be incorporated into a well operating plan to provide the optimized well potential in a well accessing the reservoir.

Claims

1. A method for hydrocarbon well decision-making, the method comprising:

characterizing reservoir potential of a reservoir over space and time using a reservoir model;

characterizing a near-well capacity of a formation adjacent to a well drilled to access the reservoir using a near-well model of a simulated well accessing the reservoir, the near-well model considering effects on the formation over time and space due to at least one of particulate movement, filter-cake presence, and scale build-up, wherein the near-well capacity comprises a capacity of the formation adjacent to the well to flow fluids without one of triggering and initiating a negative production event;

characterizing an effective production capacity based at least in part on the characterized reservoir potential as modified by the characterized near-well capacity;

determining an optimized well potential over space and time relative to the characterized effective production capacity using a well model; and

determining at least one well operating plan component that can be incorporated into a well operating plan to provide the determined optimized well potential in a well accessing the reservoir.

2. The method of claim 1 wherein the determined optimized well potential is determined based at least in part on an objective function that considers at least one of a plurality of decision-making factors.

3. The method of claim 2 wherein the objective function considers at least one of operations costs, operational risks, and modeled production rates over a life of the well.

4. The method of claim 2 wherein the well model determines the determined optimized well potential of a well operating plan in the simulated well;

and wherein determining the optimized well potential determines a corresponding optimized well operating plan.

5. The method of claim 1 wherein the well model determines the optimized well potential of a well operating plan comprising a plurality of well decisions over a period of a well'"'"'s expected life;

wherein the near-well model determines the characterized near-well capacity of the formation adjacent to the simulated well operated according to the well operating plan; and

wherein determining the optimized well potential includes iteratively varying one or more of the plurality of the well decisions.

6. The method of claim 5 wherein the well operating plan includes decisions related to one or more of drilling operations, completion operations, production operations, and treatment operations.

7. The method of claim 5 wherein the iteratively varied one or more of the plurality of well decisions are limited to combinations of well decisions utilizing available methods and equipment.

8. The method of claim 5 wherein the iteratively varied one or more of the plurality of well decisions are unconstrained;

and wherein the determined optimized well potential identifies a well operating plan requiring at least one of theoretical methods and theoretical equipment.

9. The method of claim 5 wherein iteratively varying the one or more of the plurality of well decisions affects the determined optimized well potential, the near-well capacity, and the effective production capacity;

and wherein determining the optimized well potential includes comparing at least two well operating plans comprising distinct sets of well decisions.

10. The method of claim 9 wherein one of the at least two well operating plans comprises a well operating plan describing an existing well operation;

and wherein at least one additional plan comprises a proposed operating plan including a treatment operation.

11. The method of claim 1 wherein determining the optimized well potential determines a well potential synchronous with the characterized effective production capacity over at least a subset of spatial and temporal spans of the well potential and the characterized effective production capacity.

12. The method of claim 1 further comprising exporting at least the optimized well potential for use in developing an optimized well operating plan.

13. The method of claim 12 further comprising exporting at least the determined optimized well potential and the at least one well operating plan component for use in developing the optimized well operating plan.

14. The method of claim 13 further comprising implementing the optimized well operating plan in the well accessing the reservoir.

15. The method of claim 1 further comprising implementing the well operating plan incorporating the at least one well operating plan component.

16. The method of claim 15 further comprising producing hydrocarbons from the reservoir through the well.

17. A system associated with production of hydrocarbons, the system comprising:

a well operatively connected to a subsurface reservoir;

wherein the well includes at least one component selected based at least in part on a computerized simulation constructed and arranged to;

     1) characterize reservoir potential of the subsurface reservoir over space and time using a reservoir model;

     2) characterize near-well capacity of a formation adjacent to the well using a near-well model of a simulated well accessing the reservoir, the near-well model considering effects on the formation over time and space due to at least one of particulate movement, filter-cake presence, and scale build-up, wherein the near-well capacity comprises a capacity of the formation adjacent to the well to flow fluids without one of triggering and initiating a negative production event;

     3) characterize an effective production capacity based at least in part on the characterized reservoir potential as modified by the characterized near-well capacity;

     4) determine an optimized well potential over space and time relative to the characterized effective production capacity using a well model of the simulated well accessing the reservoir; and

     5) determine at least one component that can be incorporated into a well operating plan to provide the determined optimized well potential in the well.

18. The system of claim 17 wherein the at least one component selected based at least in part on the computerized simulation is selected from equipment.

19. The system of claim 18 wherein the selected equipment is developed based at least in part on results of the computerized simulation.

20. The system of claim 17 wherein the well operating plan incorporating the at least one component is a well operating plan related to at least one of well construction operations, well completion operations, well production operations, and well treatment operations.

21. The system of claim 17 wherein the determination of the at least one component that can be incorporated into a well operating plan is constrained to available equipment.

22. A system for optimizing hydrocarbon well decision-making, the system comprising:

a processor;

a non-transitory storage medium; and

a computer application accessible by the processor and stored on at least one of the non-transitory storage medium and the processor, the computer application constructed and arranged to;

characterize reservoir potential of a reservoir over space and time using a reservoir model;

characterize near-well capacity of a formation adjacent to a well using a near-well model of a simulated well accessing the reservoir, the near-well model considering effects on the formation over time and space due to at least one of particulate movement, filter-cake presence, and scale build-up, wherein the near-well capacity comprises a capacity of the formation adjacent to the well to flow fluids without one of triggering and initiating a negative production event;

characterize an effective production capacity based at least in part on the characterized reservoir potential as modified by the characterized near-well capacity;

determine an optimized well potential over space and time relative to the characterized effective production capacity using a well model of the simulated well accessing the reservoir; and

determine at least one component that can be incorporated into a well operating plan to provide the determined optimized well potential in the well.