Research Of Remaining Oil Distribution In Qianan Oilfield

QianAn Oilfield old belonged to the low-permeability fractured sandstone reservoir, more than longitudinal reservoir development, story and graphic heterogeneity, poor reservoir properties, fracture development. Into development since 1985, after 20 years of development history, beginning with the 300×300m against nine injection patterns did not conduct large-scale adjustment, has been seriously need not meet the geological conditions, the current degree of control of water flooding only 60.3% 18.4% recovery level, integrated water 72.17%, recovery 19.07%, the remaining recoverable reserves of rich oil fields through pattern adjustment to improve the development effect is imminent. The change of the reservoir and the fluid motion law, the remaining oil distribution forecast is a comprehensive tapping the potential changes to improve recovery of the foundation.An old liberated areas, therefore the remaining dry oil distribution to take the technology route: the geological characteristics of oil reservoir and then a comprehensive understanding and detailed quantitative characterization, using microfacies method, numerical simulation method combined with dynamic data, monitoring data, testing Comprehensive information such as forecasts of remaining oil distribution, and calculate the remaining oil reserves, identify potential areas and the potential of layers, and eventually reflect the three-dimensional characteristics of the geological reservoir model (based on the contrast in the fine establishment of the single sand body structure model; according to deposition phase of research results, the establishment of the single sand body model; in the oil within the oil layer thickness according to established a reservoir distribution model; application template created log interpretation, reservoir parameters to establish the spatial structure of sand body model) eultimately defined the main layer of QianAn Oilfield old districts and non-main floor, with a main phase and main phase with non-exclusive arrangement between the inside and the remaining oil distribution, and use it as guidance for the pattern adjustment of deployment and test area implementation, through the implementation of further amendments to the understanding of the law, to the overall QianAn Oilfield old liberated areas in the future adjustments necessary technical reserves, but also to adjust for similar reservoir encryption provides a good reference.