Downhole Oil-Water Interface Detector

An oil-water interface and detector technology, which is applied to the liquid level indicator for physical variable measurement and other directions, can solve the problems of poor detection effect of downhole detection sensors, and achieve the effect of high measurement accuracy.
CN106092256BActive Publication Date: 2020-03-10BC P INC CHINA NAT PETROLEUM CORP +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
BC P INC CHINA NAT PETROLEUM CORP
Publication Date
2020-03-10

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Abstract

The invention provides a downhole oil-water interface detector which comprises a detection sensor D and a ground detector M. A plurality of detection structures are arranged on the detection sensor D, first ends of the multiple detection structures are electrically connected with one another, second ends of the multiple detection structures are connection contact points which are sequentially arranged along the height directions of the detection structures at intervals, and each detection structure comprises a detection resistor R; the ground detector M is connected with the detection sensor D, measurement voltages Vc can be outputted to the detection sensor D by the ground detector M, and measurement currents Ic which flow through the detection sensor D can be detected by the ground detector M, so that the heights of oil-water interfaces can be judged according to the measurement currents Ic. The downhole oil-water interface detector has the advantage that detection effects can be improved by the downhole oil-water interface detector.
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Description

technical field

[0001] The invention relates to the technical field of underground salt cavern gas storage cavity construction engineering, in particular to an underground oil-water interface detector. Background technique

[0002] Cavity construction of salt cavern gas storage refers to the injection of fresh water or unsaturated brine into the underground salt layer under certain control conditions, through the dissolution of salt rock and discharge of brine, thereby forming a storage space of a specific shape underground. In order to ensure the implementation of the project, it is necessary to inject fresh water into the underground salt layer from the cavity-building inner pipe in the wellbore. The annulus is continuously drained to the surface, thereby creating a volumetric space in the subsurface salt formation. In order to ensure that the space has a stable shape, it is necessary to inject diesel oil as a protective layer material into the annulus between the outer p...

Claims

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