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选取渤海古近系目标区累计20个井段的岩心,模拟实际地层温度、压力条件,对岩心直接进行岩石物理参数测试.岩心测试结果与目标区已钻井的测井数据分析相结合,以泥岩为基值计算不同层段砂泥差异百分比门槛值,优选杨氏模量、剪切模量、泊松比作为渤海中深层储层的岩石物理敏感参数.根据优选敏感参数的储层响应特征,进行三参数联合,构建目标区的储层敏感因子(Li).利用叠前反演技术反演储层敏感因子,成功识别目标区岩性-构造油气藏.钻井证实了该方法的有效性.
A total of 20 wells in the target area of Bohai Paleogene are selected to simulate the actual formation temperature and pressure conditions and to directly test the rock physical parameters.The core test results are combined with well logging data analysis of the target area, As the base value, calculate the threshold value of different percentages of sand and mud in different intervals, and choose Young’s modulus, shear modulus and Poisson’s ratio as rock physics sensitive parameters of middle and deep reservoir in Bohai Sea.According to reservoir response characteristics with preferable sensitive parameters, (Li) in the target area by inversion of prestack inversion technique, and successfully identify lithologic-structural reservoirs in the target area by using the prestack inversion technique.The drilling proved the effectiveness of this method.