High Resolution Sequence Stratigraphy And Sedimentary Microfacies In Fuyu Oilfield, East Block5-9Study

With the development of oil field, many oil fields have entered the high water cut stagein Fuyu oilfield exploitation stage, but the East5-9block at present only15.62%recoverylevel, block has a strong mining potential. Although the Fuyu oilfield has been in differentperiods for different block carried out the work of fine reservoir description, but the smalllayer based on the description of the reservoir has been unable to meet the needs of oilfieldfurther development, but also new main block adjustment wells drilled Yangdachengzireservoir well number increasing, further understanding of the original work, needimprovement. Because the remaining oil distribution during this period is very complex, ahighly dispersed state, urgent need through the refinement and deepening the study ofreservoir geology, for the next step to summarize a set of reservoir flow unit division methodand application technology to provide security, for the development of proposals to guide theadjustment and tapping the potential of remaining oil is of great significance.According to the principle and method of high resolution sequence stratigraphy, analyzestest data by use of drilling, logging and core analysis, development of East Fuyu5-9well areaand Yangdachengzi reservoirs of high resolution sequence stratigraphy, the isochronousstratigraphy framework, clear stratigraphic filling and distribution characteristics.Based onhigh resolution sequence stratigraphy and small layer contrast, make full use of drilling,logging and production data, for deviation correction and bushing elevation correction, tocarry out the main small layer micro structure study, a comprehensive analysis of theimplementation of the study area fault and micro structure, micro structure and completecontour map of each layer.Analysis of basic mountain in regional sedimentary background and source, based on theobservation of coring wells, according to the sedimentary cyclicity, mudstone color, particlesize distribution, sedimentary facies marks to determine the sedimentary microfacies types, asingle well facies profile and connecting well section, comprehensive application of welllogging data, the logging mode phase deposition. According to the principle of highresolution sequence stratigraphy, sedimentary facies principle, analysis of the lithofaciespalaeogeography, layer distribution prediction reservoir. As a guide for small layer contrast using the theory of sequence stratigraphy, based onregional geological background and core observation and logging interpretation results ofEast5-9block division of sedimentary microfacies; in small layer control, sequencestratigraphic model to guide the establishment of distribution, sand superimposition rules, andon the basis of sedimentary microfacies, to control the formation internal configuration mode;based on the block production data, make full use of geostatistical analysis technology,selection of optimum parameters of flow unit division of reservoir architecture under thecontrol of; further detailed anatomy of actual oil production data, combined with the divisionof flow units, the understanding of different flow units seepage characteristics and controlfactors, and the relationship between flow units and distribution of remaining oil and theinjection production relationship.