The Tertiary Reservoir In Yan Muxi Oilfield Fan Delta Front The Favorable Sedimentary Microfacies

The tertiary reservoir In Yan muxi oilfield has been put into production for more than ten years,it has entered into high water cut period.There is a lot of problems and difficulties in adjusting and synthetically treating the objective interval.In this paper,the energy thickness of single permeability sand bed is proposed,which can divide the favorable sedimentary microfacies effectively.The information of energy thickness of single permeability sand bed and deposited energy can be extracted by using a variety of logging responses,the data size of logging responses and the characteristics of curve which including curve amplitude,thickness,shape,contact relationship,second speciation can reflect the biggest sedimentary energy and thickness changes of the relatively high permeability single permeability sand bed.So in this way the mistakes can been overcomed effectively,which is identified in accumulated thickness of sand layer in several similar thin-bedded sand in genesis or sand-shale formations,and main sand body framework microfacies belt divided.Careful evaluation standard with advantage of single permeability sand microfacies would be established by utilizing the parameters of the logging response reflected about the thickness of the single permeability sand layer,natural gamma ray,energy decrease coefficient,acoustic time,density,neutron porosity,resistivity,borehole diameter difference and lithology,physical property data.Accurate information could be extracted,which is advantage of single permeability sand microfacies sedimentary energy and logging parameters,and it should show the sand body distribution of The main microfacies and the non-staple microfacies effectively,while the main microfacies include underwater braided channel,the non-staple microfacies include sand sheet,branch dam,wedge sand body.Making use of the regulation and characteristics of well logging response to review the evaluation carefully.According to the results of the review,that The potential of new layers,there are 22 layers and the thickness of 72.5 meters in the main microfacies,96 layers and the thickness of 406.4 meters in the non-staple microfacies.This paper could provide technical support for oil production increasing.