THE DENSITY INTERFACE INVERSION OF HIGH-PRECISION GRAVITY DATA
XIAO Peng-fei1,2, CHEN Sheng-chang1, MENG Ling-Shun2, YANG Jin-Yu3
1. College of Earth Exploration Science and Technology, Jilin University, Changchun 130026, China;
2. Science College of Zhejiang University, Hangzhou 310027, China;
3. Qingdao Institute of Marine Geology, Qingdao 266071, China
Because of instability,the downward continuation,which is the core operator of the gravity interface inversion by using Parker-Oldenburg (PO) method,restricts the application of the method. This paper introduces a stable and high-precision downward continuation substituting for the intrinsic operator in the Parker formula. Satisfactory results were obtained in the inversion by using the synthetic model and in an application of the method to gravity anomaly over the Yinggehai Sea of the South China Sea.
［1］ Parker R L.The rapid calculation of potential anomalies［J］.Geophs J R Astr Sco,1973,31:447.
［2］ Oldenburg D W.The inversion and interpretation of gravity anomalies［J］.Geophysics,1974,39(4):526.
［3］ Gomez-Ortiz D,Bhrigu N P.Agrarwal,a MATLAB program to invert the gravity anomaly over a 3D horizontal density interface by Parker-Oldenburg's algorithm［J］.Computers & Geosciences,2005,31:513.
［4］ 张作新,姜鹏里.重磁异常正反演计算在煤田中的应用［J］.中国煤田地质,1998,10(1):64.
［5］ 张凤旭,张凤琴,孟令顺,等.基于余炫变换的密度界面重力异常正反演研究［J］.石油地球物理勘探,2005,40(5):598.
［6］ 刘海龄,阎贫,张伯友,等.南海前新生代基底与东特提斯构造域［J］.海洋地质与第四纪地质,2004,24(1):15.
［7］ 段本春,范典高.利用差值切割法研究磁性基底局部起伏特征［J］.石油物探,1999,38(4):89.
［8］ 王海燕,吴燕冈,焦新华.重磁异常界面反演中的计算方法［J］.世界地质,2001,20(4):379.
［9］ 穆石敏,申宁华,孙运生.区域地球物理数据处理方法及其应用［M］.长春:吉林科学技术出版社,1990.
［10］ 王家林,王一新,万明浩.石油重磁解释［M］.北京:石油工业出版社,1991.
