The Study Of Jurassic Strata And Sedimentary Characteristics Of The Hailar Basin

Although great achievements have been made in the exploration of the hailar basin,the exploration objects are mainly the bedrock and cretaceous sediments.According to the low degree of prospecting in the Jurassic,as part of field geological investigation,exploration Wells,seismic and logging data,determination of reservoir distribution and sedimentary environment,and strive to achieve the Jurassic oil and gas exploration and implementation of new discoveries and breakthroughs.Surveillance in Inner Mongolia geological map and the predecessors of hailaer basin surrounding the Jurassic strata distribution as the instruction,field geological reconnaissance of hailaer basin surrounding the Jurassic strata,on the basis of sample analysis,established the lithology recognition: surrounding the hailaer basin Jurassic stratigraphic lithology is mainly of clastic rocks and volcanic clastic rock.Basin comprehensive utilization of core data,the hailar basin in Jurassic strata are divided into three lithology sequence from bottom to top: dark sand mudstone,glutenite group and volcanic clastic rock group.Taking full advantage of well logging,mud logging,core and seismic data,45 Wells made of synthetic seismic records,horizon calibration and system,so as to identify the T5,T6,reflection interface for the Jurassic strata or interface,to determine the fluctuation characteristics of seismic reflection interface.Closed in backbone profile,on the basis of the Jurassic strata avoidances structure mapping,the Jurassic strata thickness was fabricated with the Jurassic system structure diagram figure,can be seen from the thickness on the drawing the Jurassic in the study area is widely developed.Such as sedimentary petrology,logging geology theory as the instruction,coring well in ur Nicholson-beier depression based on core observation and description,according to the characters of core lithology,sedimentary structure,logging equal sign,the Jurassic stratigraphic analysis of single well and well tie phase,the plane distribution of sedimentary facies.The study area sedimentary type includes fan delta and lake facies.