High-frequency electromagnetic sounding is an electromagnetic exploration method using the natural high-frequency electromagnetic field as a field source. It has higher resolution and greater depth penetration than th...High-frequency electromagnetic sounding is an electromagnetic exploration method using the natural high-frequency electromagnetic field as a field source. It has higher resolution and greater depth penetration than the direct current method and is especially fit for geothermal energy exploration and low- and mid-level groundwater detection. We introduce a successful application of high-frequency electromagnetic sounding for evaluating geothermal water resources. The high frequency electromagnetic system （MT-USA with a frequency range from 10 KHz to 1 Hz） is first applied to sample field data from China. A remote reference station is used to assure sampled data quality. We then perform 2D inversion image processing with the electrical method data. The results basically indicate the spatial distribution of underground geothermal water and provide favorable clues to finding the sources of the subsurface geothermal water in this area.展开更多
This paper introduces the idea of a framework for the implementation of novel downhole probes. A couple of examples （e.g. a tracer detector, a casing smear test probe or a casing repair probe） demonstrate that many ...This paper introduces the idea of a framework for the implementation of novel downhole probes. A couple of examples （e.g. a tracer detector, a casing smear test probe or a casing repair probe） demonstrate that many components can be reused. These are the ＂bricks＂ of the ZWERG toolkit which is developed to match the environment in boreholes. Two ＂bricks＂ are described in detail： The housing （1） has to resist the pressure and other mechanical stress in deep holes. The selection of the material and the calculation of the wall thickness are the main interests. In many applications, a thermal management （2） of the inside of the probe is absolutely necessary. A dewar vessel can uncouple the heat of the geothermal reservoir and the temperature in the probe. It is important to understand the physical heat flow mechanisms. A set of formulas allows a good estimation of the quantity of heat that warms up the probe. The toolkit contains some immaterial ＂bricks＂ like blueprints of proven designs or support for the logistic process of finding and purchasing compatible components. The intention to drill near magma chambers calls for a common eflbrt of the geothermal community to gather compatible components, assemblies and knowhow and makes it widely available. ZWERG could be a starting point.展开更多
文摘High-frequency electromagnetic sounding is an electromagnetic exploration method using the natural high-frequency electromagnetic field as a field source. It has higher resolution and greater depth penetration than the direct current method and is especially fit for geothermal energy exploration and low- and mid-level groundwater detection. We introduce a successful application of high-frequency electromagnetic sounding for evaluating geothermal water resources. The high frequency electromagnetic system （MT-USA with a frequency range from 10 KHz to 1 Hz） is first applied to sample field data from China. A remote reference station is used to assure sampled data quality. We then perform 2D inversion image processing with the electrical method data. The results basically indicate the spatial distribution of underground geothermal water and provide favorable clues to finding the sources of the subsurface geothermal water in this area.
文摘This paper introduces the idea of a framework for the implementation of novel downhole probes. A couple of examples （e.g. a tracer detector, a casing smear test probe or a casing repair probe） demonstrate that many components can be reused. These are the ＂bricks＂ of the ZWERG toolkit which is developed to match the environment in boreholes. Two ＂bricks＂ are described in detail： The housing （1） has to resist the pressure and other mechanical stress in deep holes. The selection of the material and the calculation of the wall thickness are the main interests. In many applications, a thermal management （2） of the inside of the probe is absolutely necessary. A dewar vessel can uncouple the heat of the geothermal reservoir and the temperature in the probe. It is important to understand the physical heat flow mechanisms. A set of formulas allows a good estimation of the quantity of heat that warms up the probe. The toolkit contains some immaterial ＂bricks＂ like blueprints of proven designs or support for the logistic process of finding and purchasing compatible components. The intention to drill near magma chambers calls for a common eflbrt of the geothermal community to gather compatible components, assemblies and knowhow and makes it widely available. ZWERG could be a starting point.
