研究沉积层热导率变化的层析成像方法

ON TOMOGRAPHY APPLYING IN THE THEKMAL CONDUCTIVITY VARIATION OF SEDIMENTARY FORMATIONS

薛爱民 焦灵秀

Xue Aimin Jiao lingxiu

中国科学院地球物理研究所 北京100101

Research Institute of Geophysics, Academia Sinica

由于岩层的骨架热导率在整个沉积演化期内基本保持不变,所以可该看作常量。在流体性质不变的前提下,已经胶结成层的岩石的热导率仅随孔隙度和温度的变化而变化。通过对热史的计算机模拟和沉积史的模拟,可对不同时代的岩石热导享反演成像,从而获得不同时代与不同深度的热导率图像。本文讨论了利用磷灰石裂变径迹和镜质体反射率资料对热导率成像的方法,并给出一个利用镜质体反射率成像的理论模型。

As the thermal conductivity of sedimentary formations is stable throughout the periodof sedimentary evoltition,it can be regarded as a constant. With a premise of invariable offluid property,the thermal conductivity of cemented rocks changes only with the variationof porosity and temperature,By the comptiter modellings on thermal history and sedimentary history,the thermal conductivity of rocks in different times can be inversed and imaged obtaining the images of thermal conductivity in varing times and depths, In this paper, the authors discuss the imaging method of thermal conductivity according to the fission track of apatite and the data of vitrinite reflectivity and suggest a theoretical model ofimaging using vitrinite reflectivity.

https://doi.org/10.11781/sysydz199404397