Quantitative Evaluation on Volume Fracturing Effect of Conglomerate Reservoir Using Traces of Chemical Tracers
The horizontal well and extensive hydraulic fracturing combination technology is the key to develo-ping tight conglomerate reservoirs.Good fracturing effect plays an important role in the high and stable production of conglomerate reservoirs.However,there are still many problems in evaluating the fracturing effect of conglomer-ate reservoirs.Therefore,based on traces of chemical tracers,the theoretical analysis and field test combination method were used to quantitatively evaluate the volume fracturing effect of conglomerate reservoirs.The technical principles and implementation plan of traces of chemical tracers were introduced,and the production curve charac-teristics of tracers were summarized.Analysis was conducted around three aspects:production contribution,frac-ture morphology,and interwell interference,and issues related to fracture network morphology diagnosis were dis-cussed.The research results show that the production profile technology of traces of tracer can effectively identify the static and dynamic production of each fracturing section in horizontal wells,and the three monitored fracturing sections contribute 51%of the total oil production.The test well has four characteristics:"wide multiple peaks","wide peak skewness","peak skewness"and"single peak".All eight monitoring sections show"wide multiple peaks",reflecting the presence of multiple fractures in the fracturing section,which belong to complex fracture characteristics.The earlier the tracer flows back,the stronger the fracture production capacity,and the higher the permeability is.On the contrary,it represents poor fracture conductivity and low permeability.Finally,the pro-duction rate was calculated using the production of tracers in different wells,thus quantifying the strength of inter-well connectivity.The research results provide important theoretical and field guidance for the fracturing effect eval-uation and efficient development of tight conglomerate reservoirs.
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