A Study ’Four Properties’ Relations Of Chang 4+5, Chang6 Reservoir In The Dalugou Area

At present, existing wells obtained industrial oil flow in the Dalugou area, but still in the rolling development stage, in order to increase reserves and production, there is an urgent need to increase reservoir research efforts, accurate interpretation of the results, selection of favorable targets in the comprehensive evaluation of petroleum geology.On the basis of previous research results, this paper has fully mastered the existing information, integrated application of petroleum geology and other related theories, through the drilling core observation, logging data interpretation, oil test analysis and other means, the system analysis of the formation, sedimentary facies and reservoir basic geological characteristics, and the study area of reservoir lithology, physical property, gas and electrical properties of the relationship, through mathematical modeling, graphics, the establishment of the standard.The results of the study show that:the regional tectonic characteristics for the gentle west monocline, structure with good succession; main layer from bottom to top is divided into six subgroups reservoir, long one of the 62 and 61 is the main oil-bearing intervals; the Chang 4+ 5, Chang 6 oil-bearing formation delta sedimentary and delta front subfacies compared to delta plain subfacies facies; reservoir sandstone in feldspar sandstone mainly, reservoir of low porosity and ultra-low permeability mainly and deposition and diagenesis, filling of carbonate and porosity and permeability showed a negative correlation, higher carbonate content, porosity and permeability worse. In this paper, the author thinks that the interpretation method of porosity, permeability and oil saturation, and the lower limit value of all kinds of rock properties and well logging parameters can be used as reference for the further exploration and development of the Dalugou area.