Research On Reservoir Characteristics And Control Factors Of Chang 4+5 Tight Reservoir In The GT Area Of GANGUYI Oil Field

This article is basis on geological research and mainly to solve the problems about purpose layer developing in the study area,in order to further clear under the macroscopic and microscopic reservoir characteristics and the distribution of the reservoir,by indicating the results of qualitative with quantitative research,and to the whole purpose layer source experiment data as the basis of quantitative research.Both in sedimentation,diagenesis study step by step,which is more effective to deep against the formation of purpose layer,at the same time,study of reservoir characteristics of the system analysis,put forward the understanding of the study area reservoir densification.On this basis due to dense reservoir in this area based on classification of microcosmic physical property of reservoir is conventional in qualitative discussion,relatively dense reservoir microscopic quantitative characterization of physical properties of research is still weak,in order to further reduce the qualitative strong subjectivity,improving the precision of reservoir recognition of the formation,especially for quantitative classification of reservoir in this area.Therefore study from the characteristic of petrology and physical was analyzed by using the way of observing casting sections through microscope,scanning electron micrograph observations,etc.At the same time the parameters based on high-pressure mercury intrusion experiments.To the discussion of physical parameters using the correlation analysis,extract the sensitive parameters.Using multiple linear regression to calculate reservoir and regression testing,the main indicator of the sensitive parameters are set at the same time,using the product method to build composite indicator that the sensitive parameters.The reservoirs can be devoted into four types according to the data getting from Data configuration principle: Type I,Type II,Type III and Type ?.The micro-pore texture of type I and II reservoirs is preferable and the condition about reservoir and seepage is the best in the fore types of the study area.But the percentage of those two types in target reservoir is low.Type III reservoir,mainly intercrystalline pore,takes a high percentage in target reservoir,while type III reservoir will also have a certain capacity of oil production when value of porosity–permeability reach the low limit and there are fractures and low face porosity corrosion pore are around the intercrystalline pore.And there is no capacity of Type ?.The achievements of this paper about physical properties in eastern area of North Shaanxi Slope are useful and those can be the basis to estimate and exploit the resources in those reservoirs.