The article is devoted to documentation, research, and experimental confirmation of the effectiveness of the method of simulation of oil saturation of reservoir deposit with the use of a priori information in the form of J-function Leverett. The basis for the solution of nearly all geological problems are models, and the most difficult and least developed part of the modeling process still remains interpolation the parameter saturation. On the model of the petroleum saturation based solution for effective management of development of oil and gas, determining the value of oil recovery factor. There are several ways of interpolation of the parameter oil and gas saturation determination, however, none of these methods does not account for the regularities of change of ratio of oil and gas saturation determination in the transition water-oil zone. The article discusses a method of modeling oil saturation using J-function Leverett with regard to the transition water-oil zone on the example of one of the fields in Western Siberia. The technique of construction of parameter saturation consists of two stages. The first phase rebuilt the geometry model water-oil transition zone, and the second, by interpolation based water-oil transition zones and with the involvement of the indirect information: one-dimensional vertical trend of J-Leverett function calculates the parameter of saturation. Accounting transition water-oil zone deposits, as shown in the article, allows to more accurately reflect the settings of sedimentation, to justify the geometry of transition oil-water zone and, ultimately, to create a more adequate and accurate model of the saturation. In addition, the proposed method allows predicting the values of saturation in those parts of the section where the definition of the coefficient of saturation is difficult for a number of reasons, and in some areas in the transition water-oil zone where the oil saturation determination by conventional methods is difficult.
Keywords: the geological model, oil saturation, setting of sedimentation, oil-water contact, the surface of pure water, transition zone water-oil, capillary pressure.
Antipin Y.O., Belkina V.A. Modeling oil saturation of polymict reservoir deposit using the J-function Leverett (In Russ.). Territorija «NEFTEGAZ» = Oil and Gas Territory, 2016, No. 2. P. 51–57.