| Gas tracer monitoring technology in our country is in a fledging period. Most onshoreoilfield have entered period of stabilized production or production decline, in order to solveincreasing complex well condition and increase development efficiency, study of gas tracerflowing condition in porons medium has been an effective mean to increase production, thedifficulties during monitoring has also been an urgent problem.Based on a large amount of literature, sketched the domestic and foreign developmentstatus of gas tracer, compared the chemical and physical properties and applicability of watersoluble tracer and gas tracer, showed the advantage of per fluorinated naphthene tracer underthe detailed classification of gas tracer. Expounded gas tracer filter criteria, discussed the flowcharacteristics of gas tracer under continuous injection and slug injection, analyzed dispersioneffect of gas tracer in the formation. Deduced two volume calculation method throughestablishing the gas tracer convection diffusion equation.Compared the feasibility through experiment, optimized CBrF3and C4F8according tocharacteristics of Zhongyuan oilfield and referred to SF6, repeated the influence factor andbest test condition experiments of the two gas tracer, got the best response index of the gaschromatograph, established complete tracer test methods, considered the impact of absorptionon gas tracer dosage, injected the CBrF3and C4F8gas tracer, analyzed the injecting technologyand sampling system, mapped the output concentration curve of new type gas tracer aftercontinuous monitoring and analysis for70consecutive days. Described and analyzed theformation constitution through the software, achieved good effect. |
