Evaluating Carbon Dioxide Emission during Drilling Operations

One or more non-transitory machine-readable storage devices storing instructions for evaluating carbon dioxide emissions of drilling operations, the instructions being executable by one or more processing devices to cause performance of operations comprising:

• accessing, from a data store, a plurality of mechanical drilling parameters and a plurality of drilling fluid parameters;
• determining a hole cleaning index that indicates an effectiveness of removing cuttings from a borehole, the hole cleaning index comprises a cutting concentration in an annulus and a carrying capacity index that specifies the carrying capacity of the drilling fluid, determining being based on the measured parameters;
• evaluating hydraulic pressures in the borehole and in a drill bit based on the measured parameters;
• calculating a drilling specific energy based on the hole cleaning index and the evaluated hydraulic pressures;
• calculating carbon dioxide emissions of the drilling operation based on the drilling specific energy;
• and
• determining drilling parameters based on minimizing the drilling specific energy and calculated carbon dioxide emissions.

A system for evaluating carbon dioxide emissions during drilling operations, the system comprising:

• at least one processor;
• and
• a memory storing instructions that, when executed by the at least one processor, cause the at least one processor to perform operations comprising:
• measuring a plurality of mechanical drilling parameters and a plurality of drilling fluid parameters;
• determining a hole cleaning index that indicates an effectiveness of removing cuttings from a borehole, the hole cleaning index comprises a cutting concentration in an annulus and a carrying capacity index that specifies the carrying capacity of the drilling fluid, determining being based on the measured parameters;
• evaluating hydraulic pressures in the borehole and in a drill bit based on the measured parameters;
• calculating a drilling specific energy based on the hole cleaning index and the evaluated hydraulic pressures;
• calculating carbon dioxide emissions of the drilling operation based on the drilling specific energy;
• and
• determining drilling parameters based on minimizing the drilling specific energy and calculated carbon dioxide emissions.