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为了对沉积体系中各种沉积环境地层的物性进行精细研究,对塔里木盆地柯坪—巴楚露头区台地边缘—斜坡沉积体系和碎屑滨岸带沉积体系的地层进行了踏勘取样。在常温、常压下对岩样进行了超声波纵、横波速度测量,主要获得以下结论:(1)岩样超声波速度与岩样所处的沉积环境关系密切,在生物礁剖面上,从礁基、礁核、到礁盖速度递增;在三角洲剖面上,从水下分流河道、河口坝到前缘泥速度递增。(2)在生物礁剖面上,生物屑的含量是影响速度的主要因素。生物碎屑含量越高,速度越低。(3)生物礁内生物的大小与生长方向是控制岩样速度各向异性的主要因素之一。
In order to study the physical properties of various sedimentary environment strata in the sedimentary system, the strata of the sedimentary system of the slope and the sedimentary system of the clastic coastal zone in the Keping-Bachu outcrop area of Tarim Basin were surveyed. The main conclusions are as follows: (1) The velocity of the rock sample is closely related to the sedimentary environment in which the rock samples are located. From the reef basement , The reef core and the canopy cover increase in velocity. In the delta profile, the velocity of mud increases from the submarine distributary channel and estuary dam to the front edge. (2) The biochar content is the main factor influencing the speed on the bio-reef profile. The higher the biological debris content, the lower the speed. (3) The size and growth direction of bio-reef organisms is one of the main factors controlling the anisotropy of rock sample velocity.