July-27-2022 - Wednesday Daily Update - Mohammad Elkady

 

Daily Update - Mohammad Elkady - (July-27-2022)

1.  What did I do today?

I used CMOST to perform sensitivity analysis and history matching on the new modified version of our Shale model.

2.  What did I find interesting/Work on?

-       First, I performed a Sensitivity Analysis on the new model. The simulation run took around 4 hours.

-       The parameters I tested are

o   Fracture Rock Compressibility

o   Matrix Rock Compressibility

o   Hydraulic fractures water saturation

o   Hydraulic fractures tip and center Permeability

o   Natural fractures permeability

o   Water Oil Contact

o   Hydraulic fracture half-length

After the Sensitivity analysis, I run a History Matching Study to reach a good agreement with the actual data.

Steps to do the history Matching

• Right-click on the sensitivity analysis study and copy to a new study
• Navigate to Objective Functions -> History Match Quality and insert all your objective functions (Cum. Oil, Cum. Water, BHP) and in the bottom section, click insert to add objective function term.
• Parameters are already set from the sensitivity analysis (make sure you used a good range)
• Navigate to control center >> Engine settings and set the study type to history matching and engine name to CMG DECE and Select objective function name under optimization setting, also change Total number of experiments to 200. and start the study
• Then, you can leave it to finish or navigate to results and analysis >> objective functions > Run Progress >> Global Obj, once you get a reasonable history matching you can end the run.

Results:

The simulation run took around 13 hrs.

As we can see, We reached a very good agreement with the oil and water production rates. But for some reason which we need to investigate the BHP keeps increasing and not following the same trend as History.

3.  What will I do next? 

Next, I will work on the model to figure out the cause of the strange behavior of the BHP.