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涠西南凹陷南部斜坡带断裂复杂,地层埋深变化剧烈,沉积相平面变化较大,传统的时深转换方法很难满足高精度勘探的需求.根据该区块的地质和地球物理特点,在认真对比分析现有时深预测方法的基础上,提出用变速剥层法对南部斜坡带的X井进行钻前时深预测,对该区在勘探钻井过程中面临的时深预测问题进行了有益的新尝试,取得了较好的勘探效果.该方法结合多学科理论知识,充分考虑了速度的横、纵向变化,沉积相变化,井上岩性变化等综合地质影响因素,相对它法而言能更为准确的完成时深转换,满足勘探钻井需求.
断 Faults are complex in the southern slope of southwest depression, and the stratigraphic burial depth changes drastically, the sedimentary facies plane changes greatly, and the traditional time-depth conversion method is difficult to meet the needs of high-precision exploration.According to the geology and geophysical characteristics of the block, Based on the analysis of the existing time-depth prediction methods, the time-depth pre-drill prediction of the X-well in the southern slope zone is proposed by using the variable speed peel-off method. The time-depth prediction in the exploration drilling process in this area is beneficial and new Try to get a better exploration results.This method combined with multidisciplinary theoretical knowledge, taking full account of the horizontal and vertical changes in velocity, sedimentary facies changes, uphole lithology and other comprehensive geological factors, compared to its method can be more Accurate time-to-depth conversion to meet the needs of exploration and drilling.