Application Of Gravity Data Comprehensive Processing Methods In Wudalianchj Area

With the rapid development of economy, the world have to face the shortage ofresources and environmental pollution problems, it’s more urgent to search for newalternative clean energy. But this type of geothermal resources can be used as cleanenergy by people. According to the geological environment and the heat transfermechanism，geothermal resources type can be divided into system of convection typeand conductivity type of geothermal systems (According to the existing form of theheat source, it can be divided into dry rock geothermal resources and hydrothermalgeothermal resources). Hot dry rock refers to the body which exists in the deep stratawith the characters of dense and opaque and no water or steam. Usually are coveredby insulating layer such as sedimentary rocks and soil. Hot dry rock is commonly in150-650℃temperature range, wide distribution, which is almost limitless energytype with great use value as a source of energy.This paper applies comprehensive processing methods to gravity data inWudalianchi area, the main research contents as:1. Through the contrastive analysis of the model test, Shearlet transformdenoising method, denoising aspect has a good application effect in the field ofdenoising aspect. When remove the high frequency interference signals, de-noisingresidual has less effective information, playing a protective role of the effectivesignals.It provide a reliable denoising method of the potential field data processing.2. According to the result of model experiment, numerical calculation boundaryidentification methods, such as Vertical second derivative method, Tilt derivative method, Theta map method and Normalized differential method have a betterapplication effect than mathematical statistics method, such as small subdomainfiltering method.After adding the regional field, processing results have a certaindeviation with the design parameters. In the real data processing and interpretationwork, comprehensive analysis should be combined with a variety of methods, toobtain more reliable boundary identification results.3. For the gravity data processing analysis in Heilongjiang Wudalianchi, potentialfield separation method and fault identification method have a good application effect.We infer19faults and8possible hot dry rock target zones. Provide a reference basisfor subsequent geophysical work.