储盖组合三层结构分析在塔里木盆地的应用——以探讨沙53井钻探失利原因为例

RESERVOIR-TRANSITIONAL LAYER-CAP ASSOCIATION AND ITS APPLICATION IN THE TARIM BASIN— A CASE STUDY FROM THE DRILLING WELL SHA-53

本文通过对托乎拉 1号构造油气成藏地质条件综合分析 ,以及利用沙 5 3(S5 3)井钻探成果对该构造各层圈闭储盖组合三层结构剖析表明 ,“油气运移通道不畅 ,油气供给不足”并不是S5 3井在主要目的层系苏维依组顶、底砂岩段落空的主导因素 ;其钻探失利的主要原因是储、盖层之间“过渡层”厚度大于构造闭合高度 。

The analysis of reservoir transitional layer cap association was applied to interpretation of unsatisfied result of the drilling Well Sha 53 on the Tuofula 1 Structure in the Tarim Basin in terms of comprehensive geological studies of pool forming. The authors believed that, instead of the view “the unfavorable and obstructive migration pathway of hydrocarbon and insufficient amount of hydrocarbon resource', the major factor leading to the failure of achieving its initial expecting result might be thickness of the transitional layer between reservoirs and seal rocks, which was larger than that of the closed height of structures. Therefore, few effective closed height and trap bulk of structure could be formed.