Well Logging Evaluation Of M - Ⅱ Reservoir In The Cretaceous Deposits Of N - Konys Oilfield

With the further exploration and development of the N-Konys oilfield, new drilling data and test data is more and moreabundant, on the one hand, it is necessary to do more further understanding and research work about the reservoir features, such as lithology and physical property,for case of carrying out the secondary fine logging interpretation and old review in the N-konys oilfield in the later period; on the second hand, because the M-II have experienced more than30years water floodingdevelopment, the oil-water relationship have become quite complicated, combined with the serious of the reservoir heterogeneity and the interlayer, which brought great trouble for the reservoir logging evaluation research, therefore. how to correctly use the lithology, physical property, logging and production test data. For the research of the reservoir characteristics and accurate identification of the interlayer,analyzing distribution characteristics of the interlayer,which have become the first task for the next step of the oil field exploration and the increase in oil reserve and production.This paper is on the background of the actual geological conditions of N-Konys oilfield M-Ⅱ reservoir, Under the foundation of particularly analyzed many practical experimental core analysis and log data, Combining with the logging interpretation results in the study area, using the Lithology, physical property data analysis and logging data astheleadingfactor, Firstly analyzed the M-Ⅱ reservoir lithology and physical property characteristics and the response characteristics on the well logging, seismic. Which laid a foundation for correctly identify the M-Ⅱ reservoir,Then through the thin section and electron micrograph, careful analysis and study the reservoir space.And then integrated the reservoir characteristics, discuss thefluid logging response characteristics.Combined gas-oil test results to determine the lower limit of physical property. Finally, established a set of logging evaluation models which include shale content model, porosity model.permeability model and saturation model.Through77Single well log interpretation, and compared with the core, physical data and the results of the test oil, find that the model is suitable for the research area.The study of interlayer characteristics started from the core observation and analysis, then combined with the log response characteristies.showed that there are deposited two interlayers in the research area:Clayinterlayerand Calcium interlayer.Then the log distinguishing standard of interlayer was established.In the end, Build three-dimensional model and analysis the distribution characteristics of interlayers. Finally, based on the actual production data, discussthe effect on the production and development.Based on the study of reservoir characteristics, and with the characteristics of mercurous parameter, the reservoir will be divided into four types, and then use the contour map of porosity and permeability make a comprehensive evaluation of the reservoir. At last, propose the beneficial exploration areas of the M-Ⅱ reservoir, N-Konys oilfield, with the purpose of providing a reliable geologic basis to develop the reservoir reasonably and efficiently.