塔里木盆地中—新生界构造单元划分

塔里木盆地作为典型的多旋回叠合盆地,中生代以来经历了印支、燕山和喜山等多期构造运动,造成中—新生界构造格局与古生界构造格局差异较大.应用航磁、重力、钻井、测井以及地震等资料,获得了盆地中-新生界地层分布、区域构造变形特点和含油气性特征,兼顾基底形态和后期改造作用影响,对塔里木盆地中-新生界构造单元划分为“三坳一隆一斜坡”,即北部坳陷区、西南坳陷区、东南坳陷区、中央隆起区和东北斜坡区5个一级构造单元和11个二级构造单元.显然,该构造单元的划分对盆地中—新生界次生油气蘸和隐蔽油气藏勘探具有重要意义.

Division of Mesozoic and Cenozoic Structural Units in Tarim Basin

As a typical multi-superimposed basin,Tarim Basin has undergone Indosinian,Yanshan and Himalayan movements since the Mesozoic,which resulted in the great different structural patterns between the Mesozoic-Cenozoic and the Paleozoic.Based on an integrated analysis of the aeromagnetic,gravity,drilling,logging and seismic data,the Mesozoic-Cenozoic stratigraphic distribution,structural deformation styles and petroliferous features have been obtained.Considering the pre-Mesozoic basement form and late reformation,the Mesozoic-Cenozoic in Tarim Basin can be divided into five structural units,i.e.the north depression,the southwest depression,the southeast depression,the central uplift and the northeast slope,which consists of eleven subunits of structures.Clearly,this division is very significant for the exploration of secondary reservoirs and subtle reservoirs in the Mesozoic-Cenozoic.