Research On The Deep Sand Reservoir Of Changyuan Daqing And Its East Area

This subject with reservoir geology and reservoir geochemistry theories for leading, synthesizes to apply the Laser Confocal Scanning Microscope, the enclosure, the image analysis...etc. Carries on the research for lithology, the physical properties of rock, the pore type , the forming and identification of secondary pore; analyzes to the forming of reservoir , the pore dynamic state evolve, influence factor in physical properties and control factor in gas and dry Layers; makes sure the sandstone and the conglomerate porosity limit; predictes the distribution of the beneficial reservoir; creates reservoir sort standard.we obtained five creative fruits:1. This subject establishes the reservoir forming model , pore dynamic state evolve model and the secondary pore recognition taggings which resolves the recognition of the difficult pore, discoveres that shengshen2 well has high pore and high permeability because of the solution of tuffaceous matter.2. This subject made sure the deep fluid migration pathway and control to the secondary pore distribute, makes sure the laumontite dissolved pore presents an variety feature , realizes that secondary pores along T4 fault distributing, makes sure that the relation between the period of oil gas treating reservoir with the forming period for the cover and reservoir is the key to control the gas layers forming, puts forward a new standpoint that the secondary pore development tape may become the highly productive oil and gas layers.3. This subject makes sure the control factor in physical properties, the sandstone diagenesis and the conglomerate sedimentary conditions are primary factor, discovers quartz shows" form of Gravel" in the sandstone and which influence upon the pores.4. This subject applies eight indexes to raise the reliability of the beneficial reservoir forecast. Physical properties of rock in Denglouku oil formation are better in north than in south. The beneficial reservoir in Yingcheng oil formation distributes along the T4 fault's south- north position.It is our object for sandstone to seek the zone which rich in secondary pores. It is our object for conglomerate to seek good sedimentary facies in Yingsi member and to seek the reservoir who's the cause of formation is secondary pore unter Yingchen oil formation.5. This subject points out the susceptibility feature of the deep sandstone is under the control of special mineral association which is obviously different in shallow layer.they are the extensive laumontitization, the illite sericitization and the chlorite of magnesium.