论文研究 - 华北地区重力数据偏移的正演模拟研究
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Open Journal of Yangtze Gas and Oil, 2019, 4, 79-88
http://www.scirp.org/journal/ojogas
ISSN Online: 2473-1900
ISSN Print: 2473-1889
DOI:
10.4236/ojogas.2019.42006 Apr. 19, 2019 79 Open Journal of Yangtze Gas and Oil
Forward Modeling Research of Gravity Data
Offset in North China Region
Dandan Li
1,2
, Xingong Tang
1,2*
, Shuai Hou
1,2
, Kui Xiang
1,2
1
Key Laboratory of Exploration Technologies for Oil and Gas Resources of MOE, Yangtze University, Wuhan, China
2
Hubei Cooperative Innovation Center of Unconventional Oil and Gas, Wuhan, China
Abstract
Due to the complexity and overlap effects of gravity anomalies, the gravity
high point always deviates from the real position of the target.
Researching
the offset characteristics is helpful to determine the right location of gravity
anomalies. In this paper, a series of forward models were designed to calcu-
late the offset features under different assumptions. Different density models
were established based on the measured gravity data in n
orth China Sunhu
area and a variety of methods were tried to eliminate offset effects under dif-
ferent conditions. The results indicate that
the gravity anomalies of different
density bodies can be separated effectively and the real position
of target can
be correctly located by using the “layer stripping method”.
Keywords
Gravity Exploration, Gravity Offset, Forward Modeling, Potential Field
Separation, Digital Filter, Layer Stripping Method
1. Introduction
The Earth’s gravity field is closely related to the density spatial distribution of
material in the inner Earth. The information of gravity field can provide the ba-
sic parameter of resources exploration [1] [2] [3]. So far, most of the oil and gas
fields discovered in China are based on gravity method. And the application ef-
fects of gravity data heavily depend on the potential data process. The filtering
effects on gravity and magnetic data operations was first studied by Nettleton
(1954), who compared several different approaches in dealing with regional
fields [4]. S. Treitel (1967) used the Wiener filtering technique to divide the po-
tential field [5]. Wei (1984) designed a directional ellipse filter that could identi-
fy the local and regional fields with different trends [6]. More recently, Guo
et al.
How to cite this paper:
Li, D.D.,
Tang,
X
.G., Hou, S. and Xiang, K. (2019) F
orward
Modeling Research of Gravity Data Offset
in North China
Region.
Open Journal of
Yangtze Gas and Oil
,
4
, 79-88.
https:
//doi.org/10.4236/ojogas.2019.42006
Received:
April 10, 2018
Accepted:
April 16, 2019
Published:
April 19, 2019
Copyright © 201
9 by author(s) and
Scientific
Research Publishing Inc.
This work is licensed under the Creative
Commons Attribution International
License (CC BY
4.0).
http://creativecommons.org/licenses/by/4.0/
Open Access
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