Study On Application Of Non-seismic Exploration Technique In Structure Investigation In Front Of Longmen Mountain

Seismic exploration technique is the most important method in oil-gas exploration but with the defects of high cost, long period and great influence by some geological conditions as well as the working conditions. The text makes a research on the concealed structure, with non-seismic exploration technique comprehensively, of Sanxisi, Mianzhu & Luoshui, Shifang, analyzing and assessing the application effects and prospect of non-seismic exploration technique in configuration investigation.Firstly, interpret the potential concealed faults with remote-sensing image, then probe the concealed faults and define their features from different aspects with non-seismic exploration technique such as soil-geochemistry,water-geochemistry,nuclear-physics,earth-electromagnetism,earth-electric field, verifying the existence of most concealed faults with favorable effects.Under the guidance of the achievements of non-seismic exploration technique including remote sensing and with the analysis of the earthquake materials in working area, concealed fault and fracture belt have been found at the corresponding section of the earthquake, which verified the effectiveness of non-seismic exploration technique in concealed faults and had a referential meaning of interpretation of earthquake materials. Combining the earthquake materials with the achievements of non-seismic exploration technique, the feature of the concealed faults and the conditions of their extending area could be identified.With the application of non-seismic exploration technique, more than 20 concealed faults have been found successfully including Yingxiu fracture, Pengguan fracture and Guankou fracture. Also, the condition and scale of some significant fractures as well as the fluid characteristics of some others have been analyzed and defined, in which Niangchunchi hot spring in Sanxisi is one of those achievements. According to the combining features of the concealed faults in working area, some new acknowledgements about the fracture could be acquired in Mianzhu-Shifang area, in front of Longmen Moutain.1. More than 20 concealed faults have been found in the working area by using non-seismic exploration technique comprehensively, such as remote sensing, soil-geochemistry,water-geochemistry,radiometric Rn,earth-electromagnetism, most of which formed in the new configuration movement in Cretaceous Period and under the main pressure in Northwest-Southeast direction. Guandong fracture was rushed into several sections by other faults in the area of Sanxisi, demonstrated as several non-seismic exploration faults respectively. Meizigou fault and Sheshuihe fault, with obvious characteristic of water-containing, are the main controlling faults of Niangchunchi hot spring in this area.2. Through the comprehensive research of seismic & non-seismic exploration in Sanxisi & Shifang-Luoshui area, in front of Longmen Mountain, most of the concealed faults are nearly vertical to the dividing line of the mountains in the basin, in the shape of hackle and always with the characteristic of sliding. The fracture and crush belt are highly developed with obvious feature of water-containing,and are disadvantage for the conservation of oil and gas.3.Non-seismic exploration technique including remote sensing, comparatively mature with the characteristics of rapidity, convenience and accuracy, is widely used in the exploration and research of various kinds of geological resources. sounding technology of telluric electricity field, though now still in the developing stage, has acquired significant achievements of research on rock layer and concealed faults via further analysis by geology-earthquake materials. In TaZhong oil field mainly with carbonate cave reservoir, sounding technology of telluric electricity field plays a great role.Comprehensive application of non-seismic exploration technique in geological configuration investigation could afford the related geological information quickly, conveniently, economically, accurately and analyze the concealed faults as well as their features efficiently, which can make up for a deficiency of single exploration method and be suitable as a substitute in the area that owns much difficulty in earthquake exploration. In the oil-gas and geothermal exploration, combining the seismic & non-seismic exploration technique in a suitable way could improve the efficiency, reduce the cost, decline the risk and also create significant profits.