ISSN: 1003-6326
CN: 43-1239/TG
CODEN: TNMCEW

Vol. 27    No. 5    May 2017

Planting inversion of tensor gravity data
CAO Shu-jin1, 2, 3, ZHU Zi-qiang2, LU Guang-yin2
(1. Hunan Provincial Key Laboratory of Shale Gas Resource Utilization, Hunan University of Science and Technology, Xiangtan 411201, China;
2. School of Geosciences and Info-physics, Central South University, Changsha 410083, China;
3. School of Resource Environment and Safety Engineering, Hunan University of Science and Technology, Xiangtan 411201, China
)
Abstract: Large-scale inversion of gravity gradient tensor data is a time-consuming problem with high demands on computational and physical memory usage. To avoid extraordinary matrix-vector multiplications in each inverse iteration and to speed up the forward of geophysical models, planting inversion is introduced and conjugate gradient iteration replaced by accumulation summary based on L1 norm. The planting inversion easily leads to adjacent anomalies mutually invasive, a horizontal weighted function is proposed to suppress mutual interference between the adjacent anomaly sources. These results of the inversions and analysis results show that planting inversion with horizontal weighted function obtain a meaningful geophysical model. And these methods require little memory and high efficiency.
Key words: planting inversion; horizontal weighted function; gravity gradient tensor; L1 norm
Superintended by The China Association for Science and Technology (CAST)
Sponsored by The Nonferrous Metals Society of China (NFSOC)
Managed by Central South University (CSU)