A subterranean location accessed via a wellbore is treated with an oilfield fluid containing a viscosifying agent which is a polymer and a cross-linking agent which can undergo the Diels-Alder reaction to form a gel. Conditions at the subterranean location alter fluid viscosity by bringing about the Diels-Alder reaction to increase viscosity or the retro Diels-Alder reaction to decrease the viscosity of the gel.
通过井眼进入的地下位置,使用含有粘稠剂的油田液体进行处理,该粘稠剂是一种聚合物和一种可以发生Diels-Alder反应形成凝胶的
交联剂。地下位置的条件通过引发Diels-Alder反应来增加粘度或通过逆Diels-Alder反应来降低凝胶的粘度,从而改变液体粘度。