重力地形改正的等效质线法  

Equivalent mass line method for gravity terrain correction

作　　者：王宝仁[1] 陈耀[1] 

机构地区：[1]中国地质大学(武汉)物探系

出　　处：《石油地球物理勘探》1991年第5期617-624,672,共9页Oil Geophysical Prospecting

摘　　要：在山区重力勘探中,如何提高地形改正的精度,一直是一个引人关注的重要课题。本文利用高斯求积公式中的求积节点和求积系数,提出一种新的地形改正方法,称作地形改正的等效质线法。此法具有计算公式简单、精度高和物理意义明确等优点。由于此法在每个网格内采用趋势斜平面去拟合地表地形,因而提高了与实际地形的拟合程度;在实际计算中又采用自动查表方式,故能提高计算速度。文中给出的理论计算实例表明,在计算工作量相当的情况下,等效质线法的计算精度比常用的地形改正方法的精度要高。How to improve the accuracy of terrain correction in mountain- ous-district gravity survey is an important subject which people have paid close attention to.A new equivalent mass line method for terrain correction is put forward,which is based on integration knots and integration coefficients in Gaussian integration formula.This method has some advantages such as simple formula,definite physical meaning and high accuracy etc.This method makes a dipping tendency plane fit with surface terrain in each grid element,resulting in better fitting. Furthermore,this method speeds up calculation by automatically con- sulting a table,It is theoretically illustrated that in the ease of si- milar calculation,the equivalent mase line method results in better accuracy than other methods.

关 键 词：重力校正 高斯分布 

分 类 号：TE13[石油与天然气工程—油气勘探] P618.13[天文地球—矿床学]