Time dependent tracer release in stimulated gas wells using composite particles made of two different thermoplastic polyester blends of various ratios

A method for monitoring gas production in a subterranean formation comprising:

• introducing a polymer composite particle having a degradable polymer blend and a tracer into a stimulation fluid, wherein the degradable polymer blend consists of a polymer blend of a first degradable polymer and a second degradable polymer, wherein the first degradable polymer is a polyester copolymer comprising polyester and polybutylene terephthalate and the second degradable polymer is polylactic acid;
• injecting the stimulation fluid comprising the polymer composite particle into the subterranean formation to a treatment stage of a treatment zone comprising at least one opening, wherein the polymer composite particle flows into and remains inside the at least one opening;
• maintaining the polymer composite particle inside the at least one opening for an amount of time during which the polymer composite particle is exposed to moisture at a downhole temperature, wherein the moisture degrades the degradable polymer blend in the amount of time of 1 day when the first degradable polymer is present in the polymer blend in an amount of 10 wt % and the second degradable polymer is present in the polymer blend in an amount of 90 wt %, 3 days when the first degradable polymer is present in the polymer blend in an amount of 50 wt % and the second degradable polymer is present in the polymer blend in an amount of 50 wt %, and 4 days when the first degradable polymer is present in an amount of 90 wt % and the second degradable polymer is present in the polymer blend in an amount of 10 wt %;
• recovering produced gas from the subterranean formation, wherein the produced gas comprises a gaseous phase from the treatment stage of the treatment zone of the subterranean formation and the tracer;
• determining a presence of the tracer in the produced gas;
• and
• correlating the presence of the tracer to the treatment stage of the treatment zone of the subterranean formation.