Xi'an Geothermal Field Development Prospects, Based On Stratigraphic Deformation Theory

Geothermal water exploitation has already caused the head drop continuously year after year in Xi'an, Are there possibility of stratum deformation under current exploitation scale and exploitation speed? geothermal development, is there exploit mode and exploit route in Xi'an?Through study land deformation basic theories from domestic and international scholar and the fruit about deformation caused by deep layer underground fluid resource exploitation, and through analyze aquifer-system characteristic, rock and hole rate, it is known that thermal reservoir is mud-rock and sandstone largely and diagenesis degree is low, and the exploitation are mainly in ground of 1200- 2500 meters at present in Xi'an. This thermal reservoir section basically belong to deposit the basin conducting type geothermal field and the recharge amount is limited and some basically have no supply, it is non-renewable resources in certain meaning and the hot water consume basically the static storing amount. The conducting type geothermal field exploitation causes head reductions of hot water, which has destroyed the original stress state in the stratum and reduced the hole water pressure in the stratum, so the actual stress increases and the possibility of land deformation exists.Exploitations in conducting type geothermal power field exists danger of the stratum deformation calamity in the future and the exploitation prospect is no optimist. In view of this, It is needed to look for the new development mode and exploitation route. After analysis of tectonic system, physical prospecting materials and well in Xi'an area, It is known the tectonic system of Xi'an interferes with each other in geothermal power field and leads to extremely complicated scene for geological structure, meanwhile these structure is exhalant canal. Gao Ling group bottom is especially white deer Yuan group layer breakage and loose, move for that underground hot water transports to offer good passageway too. We analyse , the region of Xi'an when is breaking along line and its influence tape form distribution; The geothermal field and fracture of 2500m that especially following 3000m deliver remit place geothermal field we consider as convection type geothermal field. For Xi'an architecture technology university geothermal well(S)...