Sedimentary Characteristics Study Of Lower Cretaceous In Abei-jingmeng, Erlian Basin

In order to further expand the exploration in Erlian Basin, this study take Abei-Jingmengregion in Erlian Basin for a study area, on the basis of the basic geological data, core data,analysis of single-well facies and matching of cross section. We had a comprehensive analysisand research on the Lower Cretaceous sedimentary characteristics in Abei-Jingmeng region.Comprehensive analysis of combining various information, we established sequencestratigraphic framework of Abei-Jingmeng region initially, the basement of Abei-Jingmengregion is Paleozoic, the upper deposits are Jurassic, Aershan, Tengger and Saihan, and four majorregional unconformity are formed, develop three third order sequence, from bottom to top,respectively Aershan I-II (Sq1), Aershan III-IV(Sq2), Tengger I(Sq3). By a large numberobservation, description, analysis of core and comprehensive study of data and logging data fromrock sampling, we find out the rock type, bedding structure in Abei-Jingmeng region, analysisthe lithological signs of key wells and signs of GeoPhysics of the Lower Cretaceous inAbei-Jingmeng region, on the basis of facies signs from core observation and slices data and thecombined analysis of laboratory data to determine the type of single-well facies. In the course ofour study, observed a total of four sampling wells and the preparation of a single-well phaseanalysis diagram. This paper focuses on the analysis of single-well facies characteristics of fourwells. Through the application of logging,logging data, the regional geological setting, combinedwith the division of single-well facies of Liancan1, Gong1, Gong4and Jing2inAbei-Jingmeng region,we classified the type of sedimentary facies systematically, and we tookseismic geology facies and sequence seismic characteristics in to consideration, identified mainfacies as alluvial fan, fan delta, lacustrine facies,and divided the stages of basin development intothe development of mountain basin, development of the rift valley, die out of rift valley.By the detailed comprehensive analysis of cores observation, application logging, loggingand seismic data of wells in Abei-Jingmeng region, obtain new knowledge and breakthrough ofstudy area, evaluate advantageous play in Gong5well region.