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致密薄钙质夹层对于油气层的开发起着非常关键的作用,也是影响油气田开发的重点和难点问题。常规波阻抗反演受分辨率的限制,很难精细描述钙质隔夹层分布。随机反演与随机模拟技术具有地质意义强、垂向分辨率高的特点,为解决储层薄隔夹层分布预测问题提供了非常有力的手段。本次研究应用随机反演技术精细描述出了WEN 19油田ZJ2I油组的波阻抗特征,进而应用随机模拟技术进行了岩性的随机模拟,预测出了钙质层的空间展布,且被已钻开发井证实,该结果对于WEN 19油田ZJ2Ⅰ油组的下一步开发具有非常有利的指导作用。
The dense thin calcareous interbeds play a key role in the development of oil and gas reservoirs and are also the key and difficult issues affecting the development of oil and gas fields. Conventional wave impedance inversion is limited by the resolution, it is difficult to finely describe the distribution of calcareous intercalation. The stochastic inversion and stochastic simulation technology have the characteristics of strong geological significance and high vertical resolution, which provide a very powerful method for solving the problem of the prediction of the distribution of thin interlayer in reservoirs. In this study, the wave impedance characteristics of ZJ2I oilfield in WEN19 oilfield are described by using stochastic inversion technique. Stochastic simulation is used to simulate the lithology stochastically, and the spatial distribution of calcareous layer is predicted. Well drilling proved that the results of the WEN 19 oil field ZJ2 Ⅰ oil group for the next development has a very beneficial guidance.