普光气田地层自然造斜规律统计分析

分析和掌握地层自然造斜规律可以避免不必要的浪费和井下复杂事故的发生，对提升钻井技术水平、降低钻井成本具有非常重要的意义。运用数理统计的方法对普光气田地层自然造斜规律进行了统计分析。结果表明，普光气田的北部、中部和西部的地层自然造斜规律按照其地理位置的不同可分为3个组别。这3个组别的地层自然造斜方向虽不相同，但基本都为地层上倾方向。进一步分析表明，须家河组以上的地层自然造斜方向为300°，雷口坡组及其以下的地层自然造斜方向为170°～200°。

STATISTICAL ANALYSIS OF NATURAL STRATIGRAPHIC DEFLECTING LAW IN PUGUANG GAS FIELD

To investigate and master the natural stratigraphic deflecting law can avoid unnecessary waste and reduce downhole accidents, which is significant for improving drilling performance and decreasing drilling cost. The statistical method has been used to analyze the formation deflecting law in the Puguang gas field. The analysis results show that the natural stratigraphic deflecting law can be divided into three groups in the Puguang gas field, i. e., northern, middle and western parts. Although the deflecting directions are different from each other in three parts, the deviation directions are basically perpendicular to stratum tendency directions. Further analysis also shows the natural stratigraphic deflecting direction is about 300° above the formation of Xujiahe Fm, and about 170°-200° in Leikoupo Fm and even in the formations below in the Puguang gas field.