Method and system for reservoir characterization in connection with drilling operations
A method for analyzing reservoir fluids in connection with a drilling operation includes determining composition and isotopes of injection fluids injected into a wellbore during a drilling operation and production fluids recovered from the wellbore during the drilling operation. Reservoir fluids from a reservoir intersected by the wellbore are characterized based on the composition and isotopes of the injection fluid and of the production fluid.
1. A method for analysis of reservoir fluids in connection with a drilling operation, comprising:
determining composition and isotopes of injection fluids injected into a wellbore during a drilling operation and production fluids recovered from the well bore during the drilling operation; and
characterizing reservoir fluids of a reservoir intersected by the wellbore based on the composition and isotopes of the injection fluid and the production fluid.
2. The method of claim 1 , further comprising characterizing the reservoir fluids during the drilling operation.
3. The method of claim 1 , further comprising:
measuring pressure and flow rate of the injection and production fluids during the drilling operation; and
determining productivity of the reservoir based on pressure of the injection and production fluids and on characterization of the reservoir fluids.
4. The method of claim 3 , further comprising characterizing the reservoir based on the productivity of the reservoir.
5. The method of claim 1 , further comprising:
determining composition and isotopes of cuttings fluids recovered from reservoir cuttings; and
characterizing the reservoir fluids based on composition and isotopes of the cuttings, injection and production fluids.
6. The method of claim 5 , further comprising characterizing the reservoir fluids during the drilling operation.
7. The method of claim 5 , further comprising recovering the cuttings fluid from the formation cuttings by at least one of crushing, agitating and heating the cuttings.
8. The method of claim 3 , further comprising:
at least one of time and depth stamping cuttings with tracers;
determining a cuttings lag time based on the at least one of time and depth stamping cuttings with tracers; and
determining productivity of the reservoir based on the cuttings lag time.
9. A method for analysis of reservoir fluids in connection with drilling operations, comprising:
determining a composition of injection fluids from upstream fluids associated with a drilling operation;
determining a composition of production fluids and cutting fluids associated with a reservoir during the drilling operation; and
characterizing reservoir fluids based on the composition of the injection fluids, production fluids and cutting fluids.
10. The method of claim 9 , further comprising:
determining isotopes of the injection fluids, production fluids and cutting fluids; and
characterizing the reservoir fluids based on composition and isotopes of the injection fluids, production fluids and cutting fluids.
11. The method of claim 9 , further comprising characterizing reservoir fluids during the drilling operation.
12. The method of claim 9 , further comprising determining productivity of the reservoir based on characterization of the reservoir fluids.
13. The method of claim 12 , further comprising determining productivity of the reservoir based on characterization of the reservoir fluids and a transient reservoir model.
14. The method of claim 9 , further comprising determining productivity of the reservoir based on cuttings lag time determined by stamping cuttings with tracers.
15. The method of claim 9 wherein determining a composition of injection fluids comprises determining a composition of the injection fluids from fluids from an injection system.