The Sedimentary Characteristics Research Of Gaotaizi Reservoir In Gulong Depression

In this paper, the region Daqing Qijia —— Gulong Depression Gaotaizi reservoir lithology based on oil and gas exploration focus on the status quo, use the Sedimentology,sequence stratigraphy theory and petroleum geology as the basis for guiding, integrated use of a large number of seismic,drilling,logging core and log analysis and test data geological data, to carry out a in-depth research of the Gaotaizi reservoir sequence stratigraphy、sedimentary system and sand body distribution characteristics.By studying a lot of seismic, well logging and mud logging data and core data, application of sedimentary cycles and standard well Gaotaizi reservoirs in Qijia area were stratigraphic division, the objective layer division for GIII and GIV two sandstone group, the GⅢ sandstone group divided the 23 layer, GIV sandstone group divided 18 layer. Through in the study area core color, core structure and composition, lithology cycle, core authigenic minerals, special material containing petrology characteristics, and fossils, log phase elements, single sand body characteristics, sedimentary background and facies space allocating relation etc. factor comprehensive analysis leads to the conclusion that: in the study area to storey of Gaotaizi oil reservoirs for river—delta sedimentary phase, based on further identify delta front and prodelta 2 class sub phase and 6 microfacies: underwater distributary channel, underwater distributary mud, mouth bar and sheet sand, slump turbidite fans, beach bar product. Fine description and study the characteristics of the various sedimentary facies and microfacies,summarizes the evolution of sedimentary facies.