Non-Radioactive Tracers to Evaluate Fracturing Procedures

A method for evaluating induced fractures in a wellbore, comprising:

• pumping a first proppant into the wellbore, wherein the first proppant comprises a first tracer that is not radioactive;
• pumping a second proppant into the wellbore, simultaneous with or after the first proppant is pumped into the wellbore, wherein the second proppant comprises a second tracer that is not radioactive, and wherein the second tracer is different than the first tracer;
• obtaining a set of data in the wellbore using a downhole logging tool after the first and second proppants are pumped into the wellbore;
• and
• analyzing the set of data to determine locations of the first and second proppants in formation fractures.

A method for evaluating gravel packs or frac packs in a wellbore, comprising:

• pumping a first proppant into the wellbore, wherein the first proppant comprises a first tracer that is not radioactive;
• pumping a second proppant into the wellbore, simultaneous with or after the first proppant is pumped into the wellbore, wherein the second proppant comprises a second tracer that is not radioactive, and wherein the second tracer is different than the first tracer;
• obtaining a first set of data in the wellbore using a downhole logging tool after the first and second proppants are pumped into the wellbore;
• and
• analyzing the first set of data to determine locations of the first and second proppants in a gravel pack region in the wellbore, in induced formation fractures, or both.

A method for evaluating induced fractures in a wellbore, comprising:

• obtaining a first set of data in a wellbore using a downhole tool;
• pumping a frac fluid and a proppant into the wellbore simultaneously, after the first set of data is captured, wherein the frac fluid comprises a first tracer that is not radioactive, and wherein the proppant comprises a second tracer that is not radioactive;
• obtaining a second set of data in the wellbore using the downhole tool after the frac fluid and the proppant are pumped into the wellbore;
• and
• comparing the first and second sets of data to determine locations of the frac fluid the said proppant.