逆掩断裂带正演分析与解释——以英雄岭地区为例

doi:10.11720/wtyht.2019.1091

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Abstract

In the Qaidam Basin,the overthrust is developed and,because of the influence of fracture,the footwall imaging is difficult and complex.Based on the seismic numerical simulation technology,the authors integrated seismic and logging data to set up a geological model so as to guide the seismic processing and interpretation.The forward results of the Yingxiongling area show that,due to the high speed formation on the hanging wall,there appear monoclinic,local pseudo faults,bedrock pull-up and fault shape change in the footwall.The results obtained in this paper can be used for reference to the seismic data processing and interpretation in Yingxiongling area and exploration target areas of other structural reservoirs in the Qaidam Basin.

Key words： overthrust logging data geological model seismic forward structural reservoirs

Received: 08 March 2018 Published: 31 May 2019

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	Articles by authors
	Ye-Gang XIONG
	Zheng LUO
	Qi-Quan ZHANG
	Hai-Feng WANG
	Xiang LI
	Bo ZHU
	Zhen-Qiang WANG

Cite this article:

Ye-Gang XIONG,Zheng LUO,Qi-Quan ZHANG, et al. Overthrust belt forward analysis and interpretation:A case study of Yingxiongling area[J]. Geophysical and Geochemical Exploration, 2019, 43(3): 551-557.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2019.1091 OR https://www.wutanyuhuatan.com/EN/Y2019/V43/I3/551

Two-dimensional prestack time migration profile of Yingtan1

Three-dimensional prestack depth migration profile of Yingtan1 well

Seismic profile cross Dongde2 well and Yingtan1 well

Overthrust belt geological model

地质层位	深度/m	层速度AC/(m·s^-1)	层速度VSP/(m·s^-1)
$N 22$	103	1637	1081
$N 21$	1756	4484	4894
N₁	2430	5400	5468

Velocity tables of hanging wall of Youshashan fault with Yingtan 1 well

地质层位	深度/m	层速度VSP/(m·s^-1)
Q₁₊₂	794	2513
$N 23$	1200	2710
$N 22$	1540	3215
$N 21$	2350	3450
N₁	2866	4380
$E 32$	3592	4503
$N 31$	3928	4530
E₁₊₂	4420	4587
基岩	4498	5372

Velocity Tables of foot wall of Youshashan fault with Dongde 2 Well

Actual geological model and single shot record
a—Actual geological model;b—Single shot record of A point;c—Single shot record of B point;d—Single shot record of C point

Horizontal stacking profile of model data

Prestack time migration profile of model data

Prestack depth migration profile of modeling data

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