The Study Of Putaohua Oil Layer’s Oil-water Distribution Law In The East Of Pubei Oilfield

Pubei oilfield is located in the south of Daqing Placanticle large rivers in deltasedimentary system. Development of reservoir is Pu I oil reservoir of yaojia group LowerCretaceous，is combined with gray fine siltstone and sage green silty mudstone. The studyarea is located in the pubei oil field，which is called eastern slope nek oil-water transitionzone. The blocks affected by the strong fault segmentation and fast lithology changes bringscomplex oil-water distribution. It can lead to inefficient well. So we need to carry out thesystem of oil and water distribution of research.Using the data of cores，well logging，mud logging，and previous research results，we selected standard wells and marker bed. Using the principle of high-resolution sequencestratigraphy，isochronous stratigraphic framework is established.11small layers in472wells，26sedimentary time units in the study area has been fined and unified， repeatedlycomparisoned as a whole. It was established a unified and fine single sand body levelstratigraphic framework in the study area. Thus can provide a solid foundation for the singlesand body identification and mapping plane sedimentary microfacies. Using the data of coreand well log curve data on the basis of the isochronous stratigraphic framework，sedimentaryevolution history in the study area，and the analysis of Putaohua reservoir in the coringinterval of single well core’s sedimentary microfacies，we established six well logging faciesmodels，including main underwater distributary channel，underwater distributary channel，edge of underwater distributary channel，main sand sheet，sand sheet and bay mud betweendistributary channels. We also draw the sedimentary time unit of sedimentary microfacies. Byanalyzing the initial productivity and oil production testing data in the study area，we make ananatomy of the reservoir on the whole region. District is mainly composed of anticlinereservoir，fault block reservoir，fault-lithologic reservoir， and fault-occlusion reservoir.Combined with the reservoir profile，we can study the oil-water distribution rule respectivelyfrom the plane and vertical. The oil-water has zoning features on the plane. From the alar partslope to the anticline are respectively putaohua’s north east of wing of pure oil zone， saddleoil-water transitional zone，low position water zone and tainan wesr wing rich oil zone. Fromthe vertical direction，the study area is mainly distributed in putaohua reservoir. conformed tothe laws of oil to the water，the structural high part rich oil，and the structural low part richformation water. Through the analysis of sedimentary microfacies，sand-body distribution，structural and fault，and the impact of oil-water distribution of the study area，we think the study area’s oil-water distribution regularity is controlled by the fault-sand dispositionrelationship of regional tectonic. Tectonic block controls the oil enrichment degree and theoil-water envelopment. Oil horizontal distribution is controlled by the fault of WWE andWEE. The well controlled by sand body high angled with fault has best oil production testconclusion.