Logging Evaluation Method Of Fuyu Tight Oil Reservoir In The South Of Changyuan In Daqing

Core analysis of Fuyu oil layer in the south area of Changyuan in Daqing indicate, the physical property of Fuyu reservoir is poor, tight sandstone reservoir. Effective porosity is generally 5%-14%, average effective porosity is 9.5%; Permeability is generally 0.03×10-3μm2-10.0×10-3μm2, compared with the conventional oil and gas reservoir, the tight oil reservoir has the characteristics of thin thickness, poor physical property, strong heterogeneity and difficult exploitation. There are some technical problems in the evaluation of tight oil well logging in the above mentioned areas, the “seven nature” parameter logging evaluation of tight oil reservoir has not yet formed, could not provide effective technical support for reservoir fine evaluation and engineering construction. Tight oil reservoir properties, complex pore structure, reservoir logging evaluation, reservoir and the lower limit has not yet established a classification standard. Therefore, to carry out the research on the logging evaluation method of the tight oil reservoir in the south area of Changyuan, Daqing, has a very important guiding significance for the exploration and development of oil and gas in the area in the future.Based on the data of well logging, logging, oil testing, core analysis and other research reports, this paper will combine well logging with rock physics experiments, to carry out the "seven nature" well logging evaluation technology of tight oil reservoir, to Daqing Changyuan area south of dense Fuyu reservoir layer classification and fluid identification method of the formation of tight reservoir logging identification and evaluation technology system, of Changyuan South Fuyu dense oil reservoir formed a set of systematic logging evaluation technology, research results timely has application of production. Application of this method altogether explain more exploration wells, the average absolute error of reservoir porosity is 0.99%, and the reservoir productivity prediction level is in accordance with the rate of 86.6%. It provides technical support for the "dessert" selection and geological research.