FACIES-CONTROLLED GEOLOGICAL MODELING FOR THE SOUTHERN REGION OF MN OILFIELD IN BOHAI BAY
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摘要:
在精细地层对比、沉积相分析和隔夹层分布等研究基础上,笔者采用相控方法进行渤海MN油田南区储层三维地质建模。在沉积相模拟中,以沉积模式为蓝本,将沉积亚相展布、井震结合预测的泥岩夹层分布等确定性认识和随机模拟技术相结合,同时依据各沉积亚相内储层发育的特征和差异,选择不同的“砂包泥”和“泥包砂”模拟思路,实现逐级相控、定量表征储层的空间分布。研究结果表明,以精细油田地质特征认识为基础,采用多条件地质约束的相控建模方法,可以更好地反映沉积认识,提高储层建模的精确度。
Abstract:On the basis of fine stratigraphic correlation, sedimentary facies analysis and interlayer distribution pattern study, facies controlled three-dimensional geological modeling is carried out for the reservoirs in the southern region of MN Oilfield in Bohai Bay. In the simulation, phased facies control and quantitative characterization of reservoirs spatial distribution pattern are made according to the simulation mode either for "sandstone intercalating mudstone" or for "mudstone intercalating sand sandstone", taking the model as a clue, combined random simulation technology together with deterministic understanding, making sure the distribution of sedimentary subfacies and mudstone intercalations predicted from well data and seismic data, as well as the characteristics and differences of reservoir development in each sedimentary subfaces. The research shows that it will better reflect sedimentary understanding and improve the accuracy of reservoir modeling, if facies-controlled modeling is adopted with multi-conditional geological constraints, on the basis of fine geological characteristics.
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