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CCSD PPⅡ是中国第二口大陆科学钻探先导性试验井 ,也是第一口有测井资料的科学探索试验井。以超声波成像资料、电阻率曲线为主 ,结合井温曲线、全波波形、用ELAN PlusTM处理得到的孔隙度、渗透率曲线以及岩心观察描述 ,探讨性解释和评价该井钻遇的前寒武系结晶变质岩的裂缝和岩性界面、地下水活动、地温。共解释了 12 3处异常 ,其中裂缝 10 4处 (张开缝 99处 ,闭合缝 5处 )、岩性界面 16处、破碎带 3处。变质岩分布区只要有裂缝发育并能够提供渗流通道 ,地下水的活动就可能存在 ,活动性强弱与裂缝的渗透性大小有关。根据井温测井 ,推测江苏东海毛北地区的视地热梯度约为 2 .15℃ /10 0m。图 7表 1参 12
CCSD PP Ⅱ is China’s second mainland pilot drilling pilot science well, is also the first one with well logging information of scientific exploration test wells. Based on the data of ultrasonic imaging and the resistivity curve, combining the well temperature curve, the full-wave waveform, the porosity and permeability curves obtained by ELAN Plus TM and the core observation and description, the pre-Cambrian drilling metamorphism was explained and evaluated Department of crystalline metamorphic rock cracks and lithological interface, groundwater activity, ground temperature. A total of 12 3 anomalies were explained, of which 104 fractures (99 open slits, 5 closed slits), 16 lithologic interfaces and 3 fractures. As long as there are cracks in the metamorphic rock distribution and can provide seepage channels, groundwater activities may exist, the activity of the strength and fracture permeability. According to the well logging, it is speculated that the apparent geothermal gradient in the North of Jiangsu Province is about 2.15 ℃ / 100m. Figure 7 Table 1 reference 12