疊前時(shí)間偏移技術(shù)在煤田地震勘探中的應(yīng)用研究.pdf

1、西安科技大學(xué)碩士學(xué)位論文疊前時(shí)間偏移技術(shù)在煤田地震勘探中的應(yīng)用研究姓名：逄雯申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：地球探測(cè)與信息技術(shù)指導(dǎo)教師：侯恩科;程建遠(yuǎn)@Subject ：The Application of Pre-stack Time Migration Technology in Coalmine Seismic Exploration Specialty ：Earth Prospecting and Information Techno

2、logy Name ：Pang Wen （Signature） Instructor：Hou Enke （Signature） Cheng jianyuan （Signature） ABSTRACT Normal seismic data proces

3、sing usually uses post-stack migration, however, it just can make reflecting layers return its own position and make coiling wave converge and can’t deal with uncommon reflecting points stacking of inclining interfaces.

4、The pre-stack migration technique is one of the effective methods in solving fine velocity analysis and complex structures imaging, at the same time it is also the development tendence of seismic data imaging in our coun

5、try or overseas in recent years. Compare to pre-stack of deep migration, pre-stack of time migration demand velocity precision is not too much. In complex conformation and velocity vary not too much area, pre-stack of ti

6、me migration could make complex conformation become nicety of image. Pre-stack of time migration is more important method in practicality. This dissertation introduced the concept and principle of migration, especially p

7、re-stack time migration(PSTM), and discussed different velocity analysis methods in migration, further ascertained the application scope and preconditions of PSTM, and provided some reference for applying PSTM. Using pre

8、-stack time migration and conventional post stack migration, the seismic data were generated by forward modeling on geology model. After comparing and analyzing the seismic profiles in time domain, the conclusion was tha

9、t the pre-stack time migration had better effect in improving imaging quality of steep dip formation, and it can improve the seismic data processing quality and locate the underground complex structure more precisely. Ba

10、sed on the research of pre-stack time migration of real 3D seismic data, summarized an effective procedure for 3D pre-stack time migration. After comparing the imaging quality and recognition of small faults of pre-stack