本文選題：自然電位方法 + 過濾電場��； 參考：《吉林大學(xué)》2015年碩士論文

【摘要】：在地?zé)峥碧街校厍蛭锢矸椒ㄖ饕讲楹責(zé)崃黧w的地質(zhì)和構(gòu)造環(huán)境或是探查流體分布規(guī)律。地下水流動產(chǎn)生的過濾電場是自然電場法在地?zé)峥碧街械膽?yīng)用主要基礎(chǔ)。用經(jīng)驗公式建立過濾電場和地下水流動的關(guān)系，并應(yīng)用于自然電場數(shù)據(jù)反演地下水分布和流體屬性參數(shù)。 自然電場數(shù)據(jù)梯度采集方式有數(shù)據(jù)不穩(wěn)定性，干擾較多，誤差較大等缺點。文中采用測線形成閉合圈的方法，進(jìn)行閉合差改正，可以統(tǒng)一全區(qū)零電勢，并提高數(shù)據(jù)質(zhì)量。 地表測量自然電場不僅是場源(電流源)的響應(yīng)，也是地下介質(zhì)電導(dǎo)率分布的響應(yīng)。論文通過給出一定的模型滲透率的約束，減少源的位置不確定性，，建立更合理的電阻率模型，提高自然電場反演精度。在地?zé)峥辈橹�，在綜合其他地球物理方法探測結(jié)果基礎(chǔ)上，建立自然電位模擬正演模型，進(jìn)一步提高反演結(jié)果的準(zhǔn)確性。 以長春凈月南部區(qū)域地?zé)崽綔y為實例。采用可控源大地電磁剖面作為電阻率模型，并結(jié)合地質(zhì)資料給出滲透率模型作為約束，進(jìn)行自然電場的反演，得出地下水的流速、流向的信息，對地?zé)峥碧骄哂兄笇?dǎo)意義。
[Abstract]:In geothermal exploration, geophysical methods are mainly used to explore the geological and tectonic environment of geothermal fluids or the distribution of geothermic fluids. The filter electric field generated by groundwater flow is the main basis of the application of natural electric field method in geothermal exploration. The relationship between filtering electric field and groundwater flow is established by empirical formula, and applied to the inversion of groundwater distribution and fluid attribute parameters from natural electric field data. Large errors and other shortcomings. In this paper, by using the method of forming closed circle by measuring line, the correction of closing difference can be made, which can unify the zero potential of the whole area and improve the data quality. The natural electric field measured on the ground is not only the response of the field source (current source), It is also the response of conductivity distribution in underground media. In this paper, the model permeability constraints are given to reduce the uncertainty of source location, and a more reasonable resistivity model is established to improve the accuracy of natural electric field inversion. In geothermal exploration, based on the results of other geophysical methods, a forward model of natural potential simulation is established to further improve the accuracy of the inversion results, taking the geothermal exploration in the south of Jingyue in Changchun as an example. The magnetotelluric section of controllable source is used as resistivity model and permeability model is given as constraint in combination with geological data. The inversion of natural electric field is carried out, and the information of velocity and direction of groundwater flow is obtained, which is of guiding significance for geothermal exploration.
【學(xué)位授予單位】：吉林大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：P631.3;P314

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