The Study On Reservoir Characteristics Of Cretaceous Igneous Rocks In Lujiapu Depression

The lujiazhuang depression is one of the most abundant oil and gas depressions in the peripheral exploration of liaohe oilfield.In full,on the basis of igneous rock exploration experience at home and abroad for reference,based on the exploration in the study area,the application of fine stratigraphic contrast technology,drilling,sidewall coring observation,description and thin section analysis test results,summary,lujia fort sag igneous reservoir forming conditions and distribution law.The Mesozoic igneous reservoir in the outer basin of liaohe basin is mainly distributed in the volcanic sedimentary sequence of early cretaceous period.Lujia fort sag of Mesozoic igneous rock is classified into volcanic lava,volcanic clastic lava,pyroclastic rocks,pyroclastic rock and pyroclastic sedimentary rocks,fall into five categories including crude andesite,trachyte,basaltic andesite,basalt,andesite,andesitic mass/coarse Ann tuff,Mr Andreessen quality,rough quality,rough surface,rough surface porphyry and so on more than 20 types of rocks.Nine buddhist temple lujia fort sag and county group on the whole is given priority to with basic igneous rocks in,through core observation and thin section identification,combining well logging and seismic data analysis,to determine the for men in the study of basic igneous rocks of six phase and phase classification system and the identification standard.In this paper,the lithographic features of volcanic rocks in lujiazu depression are described.The whole volcanic facies in lujiazi mainly develop volcanic channel facies,outburst phase,invasion phase,overflow phase and volcanic sedimentary facies.On the basis of igneous rock lithology and lithofacies division correction,diagenesis and reservoir space analysis,the integrated use of reservoir property and oiliness data,analyzed the main control factors of igneous rock reservoir,sums up nine buddhist temple next paragraph and county group advantage for the development of reservoir lithology of igneous rock is: volcanic neck and lover,followed by pyroclastic flow,the phase and to go the phase again to contain clastic volcanic sedimentary,the tabular lava flows within the phase of the phase.