构造圈闭有效性的数学判别

Identification of Structural Trap Effectiveness by Math Analysis

构造圈闭有效性的数学判别,是将以往的定性分析发展为定量分析。本方法以同沉积原理为基础,用数学方法分析构造顶部与翼部的地层厚度变化关系,计算出不同地质历史时期的构造生长指数,绘制地质年代与构造生长指数的关系曲线,进而结合盆地模拟结果分析构造圈闭的有效性。给出了本方法在海相碳酸盐岩地区某构造圈闭的应用实例。用此方法进行构造圈闭评价可使油气勘探更逼近目标,减少预探风险,提高钻井成功率。

Using math analysis to identify the effectiveness of structural traps is a try at the identification from qualitative analysis to quantitative analysis. Based on synsedimentary principle, the method first ana- lyzes the variations of the structural thickness from top to flanks, calculates the growth index of the structure in different geologic time, then sets up a functional relation between geologic time and growth index, and further analyzes the effectiveness of the struc- tural trap with the help of the basin simulation. The paper demon- strates a case history of the structural trap analysis in marine car- bonate rock region. It is considered that using math analysis to e- as to reduce the exploration risks and improve economic benefit.