Study On The Chang2 Reservoir In Yucha Well Field Of Xiasiwan

Yucha well field of Xiasiwan is located in the south of the Ordos Basin,which is one important generative area.The practice exhibits that Chang 2 is primary reservoir. At present, it is in the middle-later development period and facing several problems, such as: reservoir pressure is descending, water cut is rising, stabilifying production and potentiality digging is difficult. So, based on the sediment micro face multi-wells detailed interpretation results, studying the distribution of the sand bodies and identification reservoir, is foundation of initial oil in place calculation.Making full use of core, logging data and geology analysis results, the paper carried out the accurate stratigraphic classification and strata correlation of Chang2 zone according to the principle of cycle classification and grading controlling.Based on the previous research, the paper integrated analysed sediment micro-facies and built its model. By the core analysis and logging data, build the four behaviors relationship of reservoir, established petrophysical evaluation model, such as porosity, permeability and water saturation. Made oil and water identifying plots based on test and production results,carried out re-processing of logging data. Analyzed the distribution of the sand bodies and identification reservoir.