Logging Evaluation Of Deep And Complicated Sand And Conglomerate Reservoirs

In recent years,the proportion of oil and gas reserves in low permeability reservoirs has increased by more than 60% in the newly proved reserves.With the continuous improvement of exploration technology and exploration and development,it is expected that the proportion of low-permeability reservoir reserves will be further increased,and the exploration and development work will be paid more attention.At present,low permeability reservoirs have become an important part of oil and gas field exploration and development,among which reservoir evaluation is one of the key problems in researching such reservoirs.This paper is based on the study of the Cretaceous Xiaogou Formation(K1g)low permeability sandstone reservoir in Y Oilfield,and on the basis of summarizing,digesting and absorbing the previous logging evaluation methods,we evaluate reservoir validity from lithology identification,pore structure,reservoir characteristic parameters and fluid property identification,and provide technical support for discovering new layers and exploration new fields.On the basis of the characteristics of conventional logging curve,and the electro-imaging,coring and slice data,we can identify the lithology.And then construct the LIC curve to automatically identify Lithology.At the same time,we carry out the reservoir effectiveness evaluation with the micropore structure evaluation as the core,and identify the main types of reservoirs,the type and size of reservoir space,and the parameters of reservoir quality of the research area,and then prefer to characterize reservoir quality to classify effective reservoirs.Aiming at the difficulties in the existence of deep sandy conglomerate reservoirs,we have made pioneering work and formed a comprehensive evaluation method for logging in sandstone and conglomerate reservoirs,and have achieved good results in practical application.