Measuring device of the electric properties of solid or liquid geological samples
A technology for measuring equipment and geological samples, which is applied in the direction of measuring devices, soil material testing, material inspection products, etc., and can solve problems such as limited contact surface, inaccurate measurement results, and small ring capacitance
Active Publication Date: 2011-05-18
ENI SPA
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Problems solved by technology
[0028] These devices then suffer from the drawbacks indicated above with respect to the known devices with two electrodes, and also that the capacitance of the rings is small due to the limited contact surface of the rings, so that when measurements are made at high frequencies by means of the four-electrode technique, the measurement results are not imprecise defect
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[0045] Referring to the drawings, there is shown a non-limiting preferred embodiment of an apparatus (generally designated 10) for measuring electrical properties of geological samples.
[0046] The measuring device 10 comprises a preferably cylindrical hollow body consisting of two half-shells 11, 12, one of which slides coaxially over the other half-shell, said two half-shells 11, 12 being connected to the The reduced-thickness portions 11a, 12a partially overlap in unison.
[0047] Advantageously, a pair of coplanar contacts 13 , 14 are located on each base of the half-shells 11 , 12 .
[0048] Each pair of coplanar contacts comprises a first electrode 14 for injecting current, the first electrode 14 has a substantially flat shape and is provided with a through hole 17, corresponding to the through hole 17, a second electrode for measuring voltage is arranged (13).
[0049] The first injection electrode 14 for current is preferably circular in shape, the through-hole 17 b...
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Abstract
The present invention relates to a measuring device (10) of the electric properties of solid or liquid geological samples, such as rocks, preferably from oil or gas reservoirs, and saturation fluids of the same, comprising a hollow body (11, 12) consisting of a first upper half-shell (11) and a second lower half-shell (12), the upper and lower half-shells (11, 12) coaxially sliding one inside theother, inside the body (11, 12) there being a housing seat (23) for a substantially cylindrical sample, two pairs of electrodes (13, 14) being envisaged facing the housing seat (23) for the injectionof current into a sample and for the measurement of the voltage at the ends of the sample, characterized in that the pairs of electrodes (13, 14) are pairs of coplanar electrodes, each situated at one end of the housing seat (23).
Description
technical field [0001] The present invention relates to a measuring device for electrical properties of liquid or solid geological samples, such as rocks, preferably originating from gas or oil reservoirs, and saturated fluids of gas or oil reservoirs. Background technique [0002] Measurements of low-frequency complex impedance (ie, below 100 kHz) of rock samples originating from gas or oil reservoirs are usually performed with two or four electrodes, respectively, by two complementary measurement techniques. [0003] Various single techniques are currently implemented with associated measuring devices comprising two or four electrodes, respectively. This means that the configuration has to be changed according to the techniques to be used, and it is then impossible to apply these techniques in quick succession. [0004] In a measuring device with two electrodes, electrical contact is established between each electrode and a portion of the sample surface, an alternating cu...
Claims
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IPC IPC(8): G01N27/04G01N27/07
CPCG01N27/041G01N33/24G01N27/07
Inventor S·卡帕科塞奥利M·鲁克赫斯N·G·博纳
Owner ENI SPA