Logging Evaluation Of Reservoirs And Experiments Of Pebbled Sandstone In Jia Basin

The pore structure of Jia Basin's pebbled sandstone is complex,which leads to the complex regulation of oil layers' resistivity.Because of the slight understanding of oil layers,we may misjudge the low-resistivity oil layers.This thesis use the lithology,physical properties,well-logging,oil production test,geology and experiments' results to analyze the reasons of why the A block is low-resistive.I compared the high-resistive-wells and the low-resistive wells of A block,with some highresistive-wells of B block.And we did lithology,rock-electricity,whole-rock,thin section,phase permeability,mercury injection and nuclear magnetism these experiments and compared the results of the experiments and the original data.I am going to find the properties of the lowresistive wells.By analyzing the macroscopic factors and micro factors,such as the mud invasion,instructions' error,skeleton,pore,salinity of formation water,we found the factors of the lowresistance-formation.I think the main factor of this situation is the complex pore structure.When finishing the factors of the low-resistance-wells,I built the parameters' model of the reservoir.Facing with the complex pore structure,I calculated the shale content,porosity,permeability and irreducible water saturation,and I proposed the 3-factors-electricity-model and the effective-rock-factors-decomposition-model.By comparison of the new models and the traditional Arichie formation,I proposed the advantages of the new methods,which have good correspondence with the rock data.I used plot method and the gas logging method to distinguish water formation and oil formation,while the result is basically in agreement with the interpretation.