| abstract |
The invention provides a method for monitoring the oil saturation of each section of horizontal well fracturing by using a tracer. The test is carried out by using the chromatographic effect of the distributive tracer and the non-distributive tracer in the fracture, and the specific steps include the tracer Selection, partition coefficient determination, dosage calculation, solution preparation, on-site injection, sampling test and result analysis, by analyzing and comparing the sample time corresponding to the highest concentration of the distribution tracer and non-distributable tracer output curve, the water can be accurately calculated. Oil saturation of each stage of horizontal well fracturing. This method is easy to operate, economical, intuitive and reliable. On the one hand, it can provide key technical supplements for evaluating the effect of staged fracturing in horizontal wells. The production management of horizontal wells with stage fracturing plays an important guiding role. |