关键词: 储层地质建模, 条件模拟, 渗透率, 三维模型

Abstract: Based upon the theories of conditional indicator simulation,an approach for predicting the distribution of rocks with different permeability categories is presented.The conditional indicator simulation is a non-parameter simulating method.Compared with other Guassian simulation methods such as Turning Band Algorithm,it does not require the simulated variables having a predetermined probability distribution model,which is very useful in simulation of variables with outliners.The approach is applied to the northern testing area of Lamadian oilfield,the north part of Daqing placanticline in the Songliao Basin.The data used in the modeling of permeability in three dimensions for different flowing units are extracted from the database of development wells in Daqing oilfields.The permeability is first converted into indicators,and the indicator logs in all wells are calculated by interpretstion.The indicator variograms for different permeability categories are modeled with the exponent functions from the indicator logs in wells.3-D data volume of indicators for permeability and thickness for different permeability categories in Saertu,Putaohua and Gaotaizi oil-bearing formations are calculated by the conditional indicator simulation.The results of modeling can be used as input to reservoir simulators and as important information to predict the distribution of residual oil in the research area.

Key words: reservoir modeling, conditional simulation, permeability, 3-D model