岩性反演及其在N871三角洲发育区应用

Lithology Inversion and Application in N871 Delta Area

波阻抗反演技术可以提高储层描述的精度。为解决由于某些地区受速度重叠影响,储层与非储层在波阻抗反演数据体上难于区分出来的问题,利用基于地质统计学的岩性反演技术则可以在波阻抗反演基础上加入波阻抗岩性统计信息和测井岩性解释结果直接反演出岩性剖面,因而可以解决波阻抗重叠问题,达到储层反演和描述的目的。在三角洲发育的N871地区采取有针对性的实际反演处理和储层描述以及后续钻井验证,取得了较为理想的效果。

Impedance inversion technique can improve the precision of reservoir description, but due to velocity overlaps between reservoir and non-reservoir in some area, reservoir on impedance section is difficult to make a difference. Lithology inversion technique can inverse lithology,it can solve velocity overlap problem and achieve the destination of reservoir inversion and description. The ideal processing results on N871 delta area are achieved by using this method in real inversion and reservoir description.