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TX坳陷是一个低探区。坳陷内的上白垩系——下第三系是一套浅海相地层,查明这套地层的范围、沉积环境和各种岩相分布,对油气勘探和预测是很有意义的。本区的勘探程度低,坳陷内还没有钻到这套地层的钻井。这项研究工作从了解构造背景入手,再利用边缘露头和钻井资料建立起沉积模式;同时,我们又根据反区域射层顶底不整一现象和反射波特征确定了地震层序和划分出地震相。然后,我们通过各地震相的地质解释,将地震相转换为沉积相。最后,文中指出了本区内油气储集较有利的相带。文中指出,由于各种因素的影响及地质解释已知条件的缺乏,所得成果是粗略的,推测性成分较多。但对勘探程度低的地区,这项工作仍很必要。
TX depression is a low exploration area. The Upper Cretaceous-Lower Tertiary in the depression is a set of shallow marine facies. It is meaningful to ascertain the scope of this formation, sedimentary environment and various lithofacies distribution for the exploration and prediction of oil and gas. The exploration level in this area is low, and drilling in this formation has not been drilled in the depression. This work starts with understanding the tectonic setting, and then uses the edge outcrop and drilling data to establish the sedimentary model. At the same time, we also determine the seismic sequence and seismic facies based on the top-bottom irregularities and reflection wave features of the anti-regional shotgun . Then, we converted the seismic facies into sedimentary facies through the geological interpretation of each phase. Finally, the article points out the more favorable facies belt of oil and gas accumulation in this area. The article pointed out that due to various factors and geological interpretation of the lack of known conditions, the results obtained are rough, more speculative components. However, for areas with low exploration levels, this work is still necessary.