摘要
对以往的二维断裂重力异常的梯度解释方法作了几点改进:①采用最小二乘拟合方法求取台阶倾角α;②直接利用台阶倾角与台阶的水平边界位置来计算台阶的埋深;③将重力二维梯度解释方法推广到复杂断裂模型的解释。文中详细论述了这种方法的原理,给出了其具体实现步骤。该方法比起以往重力梯度解释方法,应用更加简便而且解释结果更加稳定。用该法成功地解释了某油气盆地的实测重力资料。
In this paper, some improvements have been made on the traditional gradient interpretation methods for the two-dimensional fault gravity anomalies： ① The least squares fitting technique is adopted to figure out the dip angleαof the step; ② The dip angle and the horizontal boundary of the step are directly used to calculate the burial depth of the step; ③ the interpretation method for gravity two-dimensional gradient is extended to the interpretation of the complex fault model. The principle and operation means of this method are dealt with in detail in this paper. Compared with the traditional gravity gradient interpretation methods, this method is simpler and yields more stable interpretation results. With this method, the measured gravity data from a certain oil and gas basin were successfully interpreted.
出处
《物探与化探》
CAS
CSCD
2005年第4期347-350,共4页
Geophysical and Geochemical Exploration
关键词
重力异常
梯度法
倾斜台阶
复杂断裂
gravity anomaly
gradient method
tilted step
complex fault
