岩性-物性高分辨率非线性联合反演技术及其应用

High-resolution nonlinear lithologic-petrophysical joint inversion technique and its application

(1.中国科学院地质与地球物理研究所，北京100029；2.中海石油研究中心，北京100027；3.中海实业公司信息技术开发分公司，北京100027)

Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029,China

在沉积环境复杂和钻井资料少的勘探地区，有效地进行地震反演和储层预测是油气勘探和开发中的关键。针对我国近海岩性和物性高度非均质复杂隐蔽岩性储层的勘探实际，提出了基于非线性统计地震褶积模型和非线性储层岩性物性统计褶积模型的联合反演技术，实现了确定性反演、统计性反演和非线性理论三者的有机结合。南黄海盆地北部坳陷北凹陷A构造、辽东湾渤中251勘探区和旅大勘探区的目的层是以曲流河与辫状河为主的河流相沉积和以三角洲前缘与浅湖为主的湖泊相沉积，储层的岩性和物性高度非均质，岩石物理关系复杂。将岩性—物性高分辨率非线性联合反演技术应用于这些地区，反演结果刻画了储层岩性和物性的横向变化细节。

In exploration areas with complicated sedimentary environment and few drilling wells,effective seismic inversion and reservoir prediction is the key to exploration.Aiming at the actual exploration of serious heterogeneous and complex lithological reservoirs in our coastal sea,a joint inversion technique based on nonlinear statistical seismic convolution model and nonlinear lithology petrophysical statistical convolution model was proposed,which combined deterministic inversion,statistical inversion and nonlinear theory.The exploration targets of A structure at the north depression in South Yellow Sea Basin,Bozhong25-1 exploration area and Lvda exploration area at Liaodong Gulf are fluvial facies sediments dominated by meandering river and braid river,and lacustrine facies sediments dominated by delta front and shallow lake,where reservoir lithology is highly heterogeneous and petrophysical relation is complex.The high-resolution nonlinear inversion technique was applied to these areas;the result fine describes the lateral changes of lithology and petrophysical properties.