Fluid Identification Methods Of Gaotaizi Oil Reservoirs In Cha48Block

With deeply developing of Jilin oilfield, we begin to develop the oil deposit with relatively bad geological conditions and complicated gas water distribution relation instead of that with relatively good geological conditions and simple gas water distribution relation. And such hard producing reserves has gradually become the subject of exploration and development. Therefore, the complex fluid identification, and oil-water distribution research will become the most important content for this kind of oilfield development. Cha48block is located in Qianan oilfield of the southern Songliao basin and it is a complex oil-gas reservoirs area with low porosity, low permeability oil and mainly controlled by lithology. At present, we have found such oil gas reservoirs in this area.In this paper, we analyse the macroscopic and microscopic geological regularities of the reservoir, and then we deepen the understanding of reservoir by utilizing logging, geological, coring, production data comprehensively and establish the shale content, porosity, permeability and quantitative interpretation model by using "core calibration logging" technology on the basis of analysis of four-property relationship. Then by using analysis of the experimental data of rock electricity combined with theoretical, we establish oil saturation model for this area. We establish qualitative and quantitative evaluation method based on the corresponding research results of rock physics and form a set of effective method to identify oil and water layers qualitatively and quantitatively. And then analyze the distribution rules of reservoir parameters and the vertical and horizontal distribution characteristics of oil and water.This paper research, which is based on a large number of actual data, gets a set of suitable and effective technology for the block to recognize oil～water layers which we use to solve the problem of identifying fluid in actual production process. This provides the basis for the research on speeding up the pace of oilfield exploration and development and reservoir evaluation, as well as, it provides technical accumulation and reference to similar reservoirs evaluation。...