The Fine Description Of Reservoir And The Distributing Of Remaining Oil Of The Putaohua Reservoir In Daanbei Oil Field, Songliao Basin

Considering the geological characteristics and development of Daanbei oil-field, applying exploration and development data, guided by the theory of petroleum geology, sedimentology, reservoir geology, development geology, and reservoir engineering, adopting the technical means of high-resolution sequence stratigraphy, reservoir 3D modeling, and reservoir numerical simulation, fine description and distribution of the remaining hydrocarbon of oil-field have been studied.Applying theory of high resolution sequence stratigraphy, Putaohua layer can be divided into three 4th order and nine 5th order high-resolution sequences Correlation of these stratigraphic units based on densely-spaced borehole data provides a high resolution correctable stratigraphic framework for the study of fine reservoir description.Analyzing the background and characteristics of sedimentary and core, the micro facies of the formation are studied. The conclusion is that this area is at the frontal delta zone, micro facies are mainly distributary channel, mouth bar and bays. sand sheet, and shallow-lake facies, the main reservoir sand is river sand and the bar, Based on microfacies types been recognized in the oil field , build a discriminance criterion for well logging curves and determine sedimentary microfacies automaticly.Considering the high shale content, poor rock difference and litho-electric, difficult physics interpretation in this area ,a better reservoir interpretation model for this area is presented by using the calibrated logging and Analyzing the relationship between core and well logging the reservoir parameters interpretation model established,Based on the analysis of core and reservoir parameters interpretation model the heterogeneous interpretation is studied. Macro heterogeneity and Vertical permeability rhythmicity study indicates that the reservoir bed is high heterogeneous.Barrier/interbed and architectural elements is built Based on observation of drill core and analysis of well logging curves,Based on the relationship between porosity,permeability and produced data , the inner connected sands can be classified three types of flow units ,The 3D geology model is build by applying 3D geology modeling. Some reservoir parameters are modeled using deterministic averaging methods,other are modeled using stochastic algorithm .The reservoir numerical simulation, quantitative research and distribution of remaining hydrocarbon in putaohua are discussed, The research indicated that the remaining oil distribution is controlled mainly by the reservoir heterogeneity...