Part-constrained 3D gravity inversion for the Hubabei buried hill in Raoyang Sag
Gu Wenbin1, Chen Qingli2, Wang Yuquan1, Li Xiaoyan1, Wu Yingquan1, Wang Jian1
1. Geophysical Exploration Research Institute, Huabei Oilfield Company, PetroChina, Renqiu, Hebei 062552, China;
2. Geophysics and Oil Resource Institute, Yangtze University, Wuhan, Hubei 430100, China
Abstract：Buried hills of the pre-Tertiary are important targets for oil and gas exploration.In order to recognize structural features of the Hubabei buried hills,large-scale gravity data is processed and inverted.First residual gravity anomaly is calculated by removing regional trend through the least squares method.Then a quadric surface is used as a trend.Residual gravity anomaly is transformed to the frequency domain from the spatial domain using two-dimensional Fourier transformation.A three-dimensional initial model is built based on seismic interpretation data of the pre-Tertiary top boundary,and the density data based on the logging data.Three-dimensional structure inversion is applied to the residual gravity data by Parker algorithm.A constrain grid is also created based on the quality of the seismic data to confine the inversion.The final model of the buried hill is obtained by the inversion.Result shows that the proposed 3D inversion is an effective method to recognize structural features of buried hills.
谷文彬, 陈清礼, 王余泉, 李晓燕, 伍应权, 汪剑. 饶阳凹陷虎8北潜山重力三维松约束反演[J]. 石油地球物理勘探, 2016, 51(6): 1219-1226.
Gu Wenbin, Chen Qingli, Wang Yuquan, Li Xiaoyan, Wu Yingquan, Wang Jian. Part-constrained 3D gravity inversion for the Hubabei buried hill in Raoyang Sag. OGP, 2016, 51(6): 1219-1226.
Yi Shiwei,Liu Jingwang,Wu Yingquan. Breakthrough and enlightenment for buried-hill exploration in Raoyang sag in recent years. China Petroleum Exploration, 2010, 16(6):1-9.
Tian Shifeng,Zha Ming,Wu Kongyou et al.Distribution features and enrichment regularity of buried hill reservoirs in Raoyang sag. Marine Geology & Quaternary Geology, 2009,29(4):143-150.
Yao Changli, Zheng Yuanman,Zhang Yiwen. 3-D gravity and magnetic inversion for physical properties using stochastic subspaces. Chinese Journal of Geophysics, 2007, 50(5):1576-1583.
[5]
Chen Shi,Zhang Jian,Shi Yaolin. Gravity inversion using the frequency characteristics of the density distribution. Applied Geophysics, 2008,5(2):99-106.
Yao Changli,Guan Zhining,Wu Qibin et al.An analysis of Euler deconvolution and its improvement.Geophyiscal & Geochemical Exploration, 2004,28(2):150-155.
Ke Xiaoping,Wang Yong,Xu Houze et al.The three-dimensional crustal density structure of the Tibetan Plateau from gravity inversion. Progress in Geophy-sics, 2009, 24(2):448-455.
Chen Shi,Wang Qinghua,Wang Qianshen et al. The 3D density structure and gravity change of Ludian Ms6.5 Yunnan epicenter and surrounding regions. Chinese Journal of Geophysics, 2014, 57(9):3080-3090.
Lin Wei,Zhang Jian,Li Jiabiao. 3D inversion of gravity anomaly with GPU in the Mesozoic residual basins of Nansha Thitu Island and reefs area. Journal of Tropical Oceanography, 32(4):36-42.
Feng Juan,Meng Xiaohong,Chen Zhaoxi et al. Theinvestigation and application of three-dimensional density interface. Chinese Journal of Geophysics,2014,57(1):287-294.
Wang Zongli,Li Jun,Li Zhengwen et al. Hydrocarbon accumulation characters and exploration prospects of deep-seated oil-gas reservoirs in Bohai bay basin. Marine Geology & Quaternary Geology, 2010,30(3):105-112.
Zhao Xianzheng,Wu Zhaohui,Yan Baoyi et al. Distribution and types of buried hill oil-gas reservoir in Jizhong depression. Xinjiang Petroleum Geology, 2010,31(1):4-6.
