Fluid resistivity and conductivity probe
A technology of resistivity and conductivity, which is applied in the field of measuring fluid resistivity and conductivity probes, can solve the problems of inapplicability, inability to measure formation fluid resistivity and conductivity, bulky volume, etc., and achieve the effect of high pressure resistance
Active Publication Date: 2013-02-13
CHINA NAT OFFSHORE OIL CORP +1
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Problems solved by technology
The current resistivity or conductivity probes cannot be used in downhole high temperature and high pressure environments. In addition, resistivity or conductivity instruments are mainly used to measure the resistivity or conductivity of the formation around the outside of the instrument. The structure is complex and bulky, and cannot be used for formation testing instruments. Used as a sensor to measure the resistivity and conductivity of the pumped formation fluid
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Embodiment Construction
[0014] like Figures 1 to 3 As shown, the present invention includes: a housing 1, a resistivity system 2, a conductivity system 3 and a balance piston 4, the resistivity system 2 and the conductivity system 3 are installed side by side in the housing 1, and the resistivity system 2 and the conductivity system 3 are installed side by side in the housing 1. The space between 3 and housing 1 is filled with hydraulic oil. The balance piston 4 is arranged on the side of the conductivity system 3 away from the resistivity system 2 for balancing the pressure between the hydraulic oil and the formation fluid. The resistivity system 2 and the conductivity system 3 are provided with a fluid circulation channel 7 penetrating through the center in the axial direction, and an insulating layer 8 is provided on the circulation channel. The insulating layer 8 is made of PEEK insulating material.
[0015] In the present invention, the resistivity system 2 and the conductivity system 3 are i...
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The invention discloses a fluid resistivity and conductivity probe, which comprises a shell, a resistivity system, a conductivity system and a balancing piston, wherein the resistivity system and the conductivity system are arranged in the shell side by side, and the space between the resistivity system and the shell and space between the conductivity system and the shell are filled with hydraulic oil; the balancing piston is arranged on one side of the conductivity system far away from the resistivity system and is used for balancing the pressure between the hydraulic oil and a stratum fluid; and the resistivity system and the conductivity system are provided with axial center-through fluid flow channels, and the flow channels are provided with insulating layers. The resistivity and conductivity probe is designed for measuring the resistivity and the conductivity of the fluid when the stratum fluid passes through the centers of the resistivity system and the conductivity system, thereby providing bases for analyzing and judging the properties of the fluid and taking a stratum authentic sample.
Description
technical field [0001] The invention relates to a probe for measuring fluid resistivity and conductivity. Background technique [0002] The electrical conductivity of different rocks and minerals in nature is different, especially when the properties of the fluid contained in the formation are different, the electrical conductivity is very different, so the resistivity and conductivity are one of the important physical parameters of the formation. Conductivity and conductivity logging is the basic method for finding and quantitatively determining the presence of oil and gas. [0003] Resistivity and conductivity probes play a very important role in identifying formation fluids, analyzing the properties of formation fluids, and providing a basis for successfully obtaining real formation samples in formation testing of petroleum exploration and development. The current resistivity or conductivity probes cannot be used in the high temperature and high pressure environment in t...
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IPC IPC(8): G01N27/06G01N27/07
Inventor 唐玉宏刘畅谭显忠王会彬周扬
Owner CHINA NAT OFFSHORE OIL CORP