The Study On Reservoir Logging Evaluation Of Corkang Oilfield

The Keerang oilfield is located in the Zhang Qiang sag at the junction of Liaoning province and the Inner Mongolia Autonomous Region,The main developing Mesozoic reservoir,the sand sea group is the main purpose layer,is a low porosity and low permeability reservoir.With the improvement of the detailed description requirements of the reservoir,it is necessary to carry out the evaluation research on the oilfield and provide technical support for the oilfield development plan.The upper part of the Bai 2 block of the Sha Hai formation belongs to Huxiang deposit.The mark layer is stable,the stratigraphic correlation is better,the lower part reservoir is more developed,the sand body gradually thins from the lower part to the high part,and the lithology is thinner,which is the lithologic oil and gas reservoir.The lower section of the Bai 2 block of Sha Hai formation belongs to the fan delta,which is not obvious,the stratigraphic correlation is not good,the lithology changes quickly,and the longitudinal thin interbedded distribution is a tectonic lithologic reservoir.The paper is based on the research object of corkang oilfield white-2 block,logging,logging,coring and test oil.The geological characteristics were analyzed by means of histogram and cross-plot.The model of shale content interpretation model,porosity interpretation model,permeability interpretation model and saturation interpretation model are established by the optimization algorithm.Especially in the saturation model part,a detailed calculation method for different muddy distribution models is given.The accumulative oil and gas thickness is calculated,and a set of electric interpretation standard applicable to this field is studied.After the actual well treatment,the 99 conclusion of 47 wells is modified,and the dominant layer and the favorable potential layer are put forward.A set of logging evaluation process and method for similar complex reservoir is formed,which indicates the direction for the recovery of the production and benefit of the old oil fields which are in the stagnant state and reevaluate the reservoir.