A new Apparatus for Long-term Petrophysical Investigations on Geothermal Reservoir Rocks at Simulated In-situ Conditions
A new Apparatus for Long-term Petrophysical Investigations on Geothermal Reservoir Rocks at Simulated In-situ Conditions
复制标题
模拟原位条件下地热储层岩石长期岩石物理研究的新装置
DOI：
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发表时间：
2008
期刊：
影响因子：
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通讯作者：
S. Meyhöfer
中科院分区：
文献类型：
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作者：
H. Milsch;E. Spangenberg;J. Kulenkampff;S. Meyhöfer
我们提出了一种新的设备，能够在几个月的时间内保持与深层地热储层相关的原位条件，同时允许进行各种连续的岩石物理调查。两个相同的装置已经在波茨坦机场安装好了。静岩覆盖层和静水孔隙压力分别可达到100 MPa和50 MPa。此外，可满足高达200°C的现场温度要求。在整个孔隙压力系统中使用耐腐蚀部件，可以在高盐地层流体中进行研究。可以同时测量岩石渗透率、电导率以及纵波和横波速度，并且可以在压力下采样孔隙流体以进行进一步的化学分析。从科学上讲，该装置的使用侧重于深层地热储层勘探开发中的风险潜力。特别是，这些研究解决了流体-岩石相互作用对储层宿主岩石输运性质的可能影响。
We present a new apparatus capable of maintaining in-situ conditions pertinent to deep geothermal reservoirs over periods of months while in the same time allowing a variety of continuous petrophysical investigations. Two identical devices have been set up at the GFZ-Potsdam. Lithostatic overburden- and hydrostatic pore pressures of up to 100 and 50 MPa, respectively can be simulated. In addition in-situ temperature requirements of up to 200°C can be met. The use of corrosion resistant parts throughout the pore pressure system allows investigations with highly saline formation fluids. Rock permeability, electrical conductivity as well as compressional- and shear-wave velocities can be measured simultaneously and the pore fluid can be sampled under pressure for further chemical analysis. Scientifically, the usage of the device focuses on risk potentials in exploration and exploitation of deep geothermal reservoirs. Particularly, the investigations address possible effects of fluid-rock interactions on the transport properties of a reservoir host rock.