地层倾角测井资料在高陡构造分析中的应用——以江汉盆地潜江凹陷北部T70井区为例

Application of Dip Logging Data in High Steep Structure Analysis:with T70 Wellblock as an Example

井斜角与地层倾角之和越接近90°,地层的拉伸现象越严重,地层对比、构造分析越是困难。研究发现,通过垂深校正(TVD)对地层油水关系分析有帮助,再利用地层倾角资料对TVD曲线校正,得到地层的真实厚度,通过真实厚度剖面间的对比,可以更为有效地分析区域构造、沉积特征、油水关系等复杂地质情况。在江汉盆地潜江凹陷北部T70井区应用获得了较好的地质应用效果。

The closer to 90°sum of hole deviation angle and dip angle is,the more serious stratigraphic stretch is and the more difficult stratigraphic correlation and structure analysis is.The research finds out that TVD is helpful in analyzing stratigraphic oil-water relation,then TVD curvature correction using dip angle data can obtain real formation thickness and final comparison of real thickness profile can help analyze effectively complex geological conditions such as regional structure,sedimentary characteristics and oil-water relation.The application of dip logging data in T70 wellblock of northern Qianjiang Depression in Jianghan Basin has got better effect.