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塔里木盆地在奥陶系、石炭系和二叠系等不同层系中存在很多地震异常体,这些异常体多数因沉积作用、构造作用而形成,部分已被钻井证实为特殊异常体,大部分异常体还未进行钻探。依据地震反射特征和内部反射结构识别异常体地质属性,将其归纳为9类,即下切状、楔状、丘状斜交前积、蘑菇状、树枝状、枕状、丘状、下凹状和透镜状异常体。通过沉积环境、速度分析以及合成声波处理研究后认为,这些异常体多数为陆相古河道砂体或海相生物礁、滩的反映,储集条件优越,如果有充足的油气源,无疑是今后勘探的有利目标。在钻探这类圈闭和目标之前,必须紧密结合地球物理、地质、测井分析,进行综合评价,才能减少风险,取得较理想的钻探效果。图1参1(李建国搞)
There are many seismic anomalies in the Ordovician, Carboniferous and Permian strata in the Tarim Basin. Most of these anomalies are formed by sedimentation and tectonism, and some of them have been confirmed as special anomalies by drilling and most of them are abnormal The body has not been drilled yet. Based on the seismic reflection characteristics and the internal reflection structure, the geology attributes of the anomalous body are identified and classified into 9 categories: undercutting, wedgeing, mounding skewness, mushroom, dendrites, pillow, mound, concave and lens Abnormal body. Based on sedimentary environment, velocity analysis and synthetic sonicate treatment, most of these anomalies are the reflection of terrestrial paleoclimate sand bodies or marine reefs and beaches, and have favorable reservoir conditions. If there is sufficient source of oil and gas, it is undoubtedly the future Prospective exploration. Before drilling such traps and targets, we must closely integrate geophysical, geologic, and well logging analysis to carry out comprehensive evaluation in order to reduce risks and achieve better drilling results. Figure 1 Senate 1 (Li Jianguo engage)