我国东海陆架地区新生代地层的热导率

对东海陆架区的浅表层柱状岩芯样品和多口钻井岩心样品的热导率数据按岩性、深度、年龄和孔隙度进行了统计分析。发现泥岩、粉砂岩和砂岩的热导率有所不同。在3000m以上，泥岩的热导率大于砂岩的热导率；而在3000m以下砂岩的热导率则大于泥岩的热导率。粉砂岩的热导率基本介于泥岩和砂岩之间。岩石的热导率和岩石样品所处的深度密切相关，随着深度的增大热导率数值增大。岩石的年龄影响岩石的热导率。在同等深度的情况下，年龄越老，热导率数值越高，但埋深浅的老地层热导率会小于埋深大的新地层的热导率。孔隙度和含水对岩石样品的热导率有很大的影响，岩石会因孔隙中含水而使热导率有非常大的变化。本文给出了饱和水热导率和干样热导率之差和孔隙度的回归方程。

THERMAL CONDUCTIVITY OF THE CENOZOIC LAYER OF EAST CHINA SEA SHELF

Thermal conductivity data set from wells in East China Sea Shelf was studied in detail,it is suggested that thermal conductivity of mudstone,siltstone and sandstone can be different.The thermal conductivity of mudstone is usually higher than that of sandstone at the depth less than 3000m,and lower at the depth greater than 3000m.The thermal conductivity of siltstone is in the middle.The thermal conductivity is varied with depth,it usually become higher with depth.The age can be another factor affecting the thermal conductivity, at the same depth usually the older of the sample the larger of its thermal conductivity,but thermal conductivity of old sample at shallower depth can be smaller than that of young sample with lower depth.Another two factors affecting thermal conductivity are porosity and saturation.The thermal conductivity of dry sample and water saturated sample can has big different.An equation was given to modify the dry thermal conductivity and fluid saturated thermal conductivity of the sample.