不同高度重力数据和井中重力数据融合反演研究

doi:10.11720/wtyht.2020.1578

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Abstract

The essential factor for determining the effect of gravity 3D inversion is the observation data, which include the quality, quantity and location. In this paper, the regularized inversion method is used to study the influence of gravity data from different heights and well observations on the inversion results. First of all, gravity data of different heights are inverted separately to verify the relationship between the inversion effect and the height of the observation surface. Then, the gravity data of different heights are inverted together to verify the improvement effect of the joint inversion. On the basis of the beneficial effects of joint inversion, when multi-plane observation data are unavailable, continuation gravity data at different heights are obtained through continuation technology, and joint continuation data and observation data are inverted to improve the inversion effect. This applies to a variety of situations. For example, when only the ground observation gravity data are available, the down continuation data and ground observation gravity data are inverted jointly; when only the airborne observation gravity data are available, the down continuation data and airborne observation gravity data are inverted jointly. Finally, taking advantage of the fact that the measured data in the boreholes are closer to the anomaly, it is added to the inversion to further improve the vertical resolution.

Key words： different heights borehole data gravity joint inversion continuation

Received: 13 December 2019 Published: 29 December 2020

P631

Corresponding Authors: XIONG Sheng-Qing E-mail: gaoxiuhevip@163.com;842091616@qq.com;xsq@agrs.cn

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	Xiu-He GAO
	Sheng-Qing XIONG
	Chang-Chun YU
	Si-Yuan SUN

Cite this article:

Xiu-He GAO,Sheng-Qing XIONG,Chang-Chun YU, et al. A study of joint inversion of gravity data from multi-planes and boreholes[J]. Geophysical and Geochemical Exploration, 2020, 44(6): 1361-1367.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2020.1578 OR https://www.wutanyuhuatan.com/EN/Y2020/V44/I6/1361

Cube model and its forward gravity data

Vertical slices of inversion results of gravity data at different heights

Vertical slices of inversion results of joint gravity data at different heights(y=2.5 km)

Inverted density models using the joint observed gravity and continuation gravity data(y=2.5 km)

Well gravity and well density at different locations

Recovered density models in the constraint of well data(the solid white line represents the drilling location)

Gravity data based on double prisms

The simulated data observed in the wells

Recovered double-prism models(the solid white line represents the drilling location)

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