Reservoir Rock Of Marlstone In Shulu Sag Of Central Hebei Depression

Through the central beam deer sag under three section conglomerate, marlhorizon tracking system, reclassify the system interface, and recount the marl andthickness and percentage of breccia body.In a large number of literature research, fullyunderstand and digest, on the basis of previous data, carried on the detailed core, thinsection observation and anatomy, the sedimentary types in the studied area has carriedon the detailed division, and combining with mud logging, well logging and seismicdata, the sedimentary facies classification.In section plane according to the systemdomain, according to the quasi sequence, detailed reveals the spatial distributioncharacteristics of sedimentary microfacies.In sedimentary theory, at the same time, theother point source, fan facies model point of view, and creatively applied to theMarine carbonate gravity flow deposits mode in this area, and set up a sedimentarymodel;Secondly introducing peperite, mixed concept of sedimentary system in thesediment type and lithofacies division.Make full use of limited cores, thin sections,clay mineral analysis, physical property analysis, well logging, imaging (Angle) andother information, and connecting with the regional tectonic evolution, the reservoircharacteristics in the studied area is studied.Make full use of the imaging well loggingand stratigraphic dip data, combined with the regional structure, and the causes of theformation of cracks in the studied area, the period of time and development degree areanalyzed.Results that beam deer central depression were divided into three section1phase(lake), four kinds of subfacies (deep lake subfacies, half deep lake subfacies, andshallow lake subfacies, lakeside phase),6kinds of microfacies (particle flow code(PFC), debris flow and turbidity current, in situ deposits and mixed deposits, lakesideplaster).Using mixed well explains the concept of sedimentary system in small riftlake basin in the study area with terrigenous carbonate as the main body of varioussedimentary phenomena.Reveals the sand under the three period of reservoir spacetypes in the study area is given priority to with cracks and secondary hollow, decideon reservoir porosity and permeability is the structural fracture and solution cavity,and based on the study of reservoir evaluation standard.On the basis of sedimentaryfacies, reservoir research, and combined with logging and testing data, put forward thefavourable reservoir distributed in the peripheral deposition center, mainly low waterperiod and water into the debris flow deposits in the early and late into the systemdomain and a period of high water system tract of the mixed deposits, in turn, dividedinto favorable facies belt, and points out the optimization direction of nextexploration.