关键词: 库车坳陷, 山前带, 山地, 重磁电勘探, 多信息综合技术, 磁化率, 电阻率

Abstract: The Kuqa foreland basin is located in the west of China.It has experienced two stages of gravomagnetic and electric exploration. The first stage of reconnaissance was conducted in the 1950s.The object was to deal with the regional geological problem,such as the depression-uplift division,the distribution of faults and the thickness of sedimentary rock,as well as to provide the prerequisite for the subsequent seismic survey.In the 1990s,the second stage of detailed gravomagnetic and electric survey was carried out.A few seismic surveys were performed.Some exploration wells were drilled,and oil and gas shows were found.In combination with seismic data,the mountain, mountain front,deep-seated strata,salt and sub-salt and local structures were depicted,and the exploration targets were evaluated.The research was focused on the problem that seismic data could not reveal clearly.Fruitful achievements have been obtained during all the segments of the two stages.The geological tasks,technical competence and measurement precision involved in the first stage were much different from the second one.The combination of gravomagnetic technique with the seismic methods made it possible to achieve satisfactory results in the comprehensive understanding of mountainous area and mountain front under the complex terrain and geologic settings on surface and subsurface with the aid of mutual complement of multiple disciplines and a variety of information.

Key words: Songliao Basin, lithologic oil pool, controlling factors, exploration direction, delta front belt, lacustrine mudstone, fault