CN2502270Y - Capacitance sensor for testing total borehole fluid water-holding capacity - Google Patents
Capacitance sensor for testing total borehole fluid water-holding capacity Download PDFInfo
- Publication number
- CN2502270Y CN2502270Y CN 01251402 CN01251402U CN2502270Y CN 2502270 Y CN2502270 Y CN 2502270Y CN 01251402 CN01251402 CN 01251402 CN 01251402 U CN01251402 U CN 01251402U CN 2502270 Y CN2502270 Y CN 2502270Y
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- China
- Prior art keywords
- upward
- downward
- pole
- inner lining
- insulated liner
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
The utility model discloses a capacitance sensor for testing total borehole fluid water-holding capacity, which relates to a sensor for measuring oil and water two phase liquid infiltration rate, comprising an upward insulation inner lining(2), an upward pole(3), an upward insulation shell(4), a joining body(5), a bearing body(7), a downward pole(8), a downward insulation inner lining(9) and a downward insulation shell(10). The joining body covers the middle part of the bearing body; the upward and downward insulation inner lining is arranged on the two ends of the joining body, covering the exterior surface of the bearing body; an upward pole and a downward pole respectively cover the exterior part of the upward insulation inner lining and the downward insulation inner lining; the upward insulation shell and the downward insulation shell respectively cover the exterior part of the upward pole and the downward pole. The sensor does not adopt the method of annular flow point test to measure the infiltration rate and has the vantages of being free from the limit of the reliability of the restrictor during the measurement, not destroying the natural conditions of liquid within the well, a simple structure, and realizing point test and continuous test at the same time, convenient positioning of the instrument to the objective test point in the well, etc.
Description
Technical field: the utility model relates to a kind of instrument that is used to measure oil-water two-phase flow body water holdup.
Background technology: the surveying work of oil well liquid-producing water holdup has significance to the dynamic monitoring in oil field.Present domestic oil well productivity is lower, based on machine-pumped oil well, the sensor of existing measurement water holdup is to be main logging mode to cross the survey of annular space afflux point, it has the following disadvantages at work: 1, measure the restriction that is subjected to the current collector reliability, if current collector has leakage, just influenced the reliability of apparatus measures greatly; 2, because afflux is measured, destroy the state of nature of in-hole fluid, reduced the objectivity that downhole fluid is estimated; 3, the repeatedly repeated open of current collector and pack up operation and reduced the reliability of instrument reduces the well logging success ratio; 4, because the metering system that adopts afflux point to survey, therefore measuring point of every change all must carry out opening and packing up of a current collector, and current collector is difficult for guaranteeing in the consistance of each measuring point, make the measurement comparability between each measuring point reduce, influence the reliability of explanation results.
Summary of the invention: the utility model is a kind of full hole fluid electric capacity water holdup sensor of design.It has solved existing sensor owing to adopting annular space afflux point to survey a series of problems that cause for main logging mode.The utility model comprises insulated liner 2, top electrode 3, last insulation crust 4, connector 5, supporter 7, bottom electrode 8, following insulated liner 9, following insulation crust 10, be with connector 5 at the middle part of supporter 7, last insulated liner 2 and following insulated liner 9 are positioned at the two ends of connector 5, last insulated liner 2 and following insulated liner 9 are enclosed within on the outside surface of supporter 7, outside in last insulated liner 2 and following insulated liner 9 is with top electrode 3 and bottom electrode 8 respectively, is with insulation crust 4 and following insulation crust 10 respectively in the outside of top electrode 3 and bottom electrode 8.The mode that the utility model needn't adopt annular space afflux point to survey is measured water holdup, it also has following advantage: not restricted by the current collector reliability when 1, measuring, and can not destroy the state of nature of liquid in the well, improved the objectivity that downhole fluid is estimated: 2, sensor is simple in structure, be easy to realize, and be subjected to the influence of casing deformation little; 3, can realize some a survey and a continuous coverage simultaneously, logging technique is greatly simplified, and only carries out opening just of a centralizer after instrument is gone into the well and can log well, even centralizer can not be packed up, does not also influence the measurement of this well, well logging success ratio height; 4, instrument can navigate to the purpose measuring point easily in the down-hole, and the measurement state that is consistent, thereby measuring reliability is strengthened.
Description of drawings: Fig. 1 is a structural representation of the present utility model.
Embodiment: present embodiment by last short circuit head 1, go up insulated liner 2, top electrode 3, go up insulation crust 4, connector 5, down short circuit head 6, supporter 7, bottom electrode 8, down insulated liner 9, insulation crust 10, circuit 11 are formed down.Last short circuit head 1 and following short circuit head 6 are fixedly connected on the two ends of supporter 7.Be with connector 5 at the middle part of supporter 7.Last insulated liner 2 is between last short circuit head 1 and connector 5, following insulated liner 9 is between connector 5 and following short circuit head 6, last insulated liner 2 and following insulated liner 9 are enclosed within on the outside surface of supporter 7, outside in last insulated liner 2 and following insulated liner 9 is with stainless top electrode 3 and bottom electrode 8 respectively, is with insulation crust 4 and following insulation crust 10 respectively in the outside of top electrode 3 and bottom electrode 8.Top electrode 3 and bottom electrode 8 pass through the operational amplifier 11-2 of lead 11-3 and lead 11-1 connecting circuit 11 respectively.The measuring principle of this instrument is: when water became external phase, water had just been realized good being electrically connected with the outer wall of instrument.The outer wall of instrument is its earth potential, and therefore continuous water becomes earth potential equally.After a metal electrode utilized insulating material and continuously water realizes that electricity is isolated, metal electrode had just constituted the two poles of the earth of electric capacity with continuous water.Because the thickness of insulating material is fixed, when discrete oil phase is in contact with it, be equivalent to change the distance between electric capacity the two poles of the earth, thereby electric capacity changes, the change of electric capacity is relevant with water holdup, so can realize the measurement of water holdup.
Claims (3)
1, full hole fluid electric capacity water holdup sensor, it comprises insulated liner (2), top electrode (3), last insulation crust (4), connector (5), supporter (7), bottom electrode (8), following insulated liner (9), following insulation crust (10), it is characterized in that being with connector (5) at the middle part of supporter (7), last insulated liner (2) and following insulated liner (9) are positioned at the two ends of connector (5), last insulated liner (2) and following insulated liner (9) are enclosed within on the outside surface of supporter (7), be with top electrode (3) and bottom electrode (8) respectively in the outside of last insulated liner (2) and following insulated liner (9), be with insulation crust (4) and following insulation crust (10) respectively in the outside of top electrode (3) and bottom electrode (8).
2, full hole fluid electric capacity water holdup sensor according to claim 1 is characterized in that short circuit head (1) and following short circuit head (6) are fixedly connected on the two ends of supporter (7).
3,, it is characterized in that top electrode (3) and bottom electrode (8) pass through the operational amplifier (11-2) of lead (11-3) and lead (11-1) connecting circuit (11) respectively according to claim 1,2 described full hole fluid electric capacity water holdup sensors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01251402 CN2502270Y (en) | 2001-11-09 | 2001-11-09 | Capacitance sensor for testing total borehole fluid water-holding capacity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01251402 CN2502270Y (en) | 2001-11-09 | 2001-11-09 | Capacitance sensor for testing total borehole fluid water-holding capacity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2502270Y true CN2502270Y (en) | 2002-07-24 |
Family
ID=33661341
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01251402 Expired - Fee Related CN2502270Y (en) | 2001-11-09 | 2001-11-09 | Capacitance sensor for testing total borehole fluid water-holding capacity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2502270Y (en) |
-
2001
- 2001-11-09 CN CN 01251402 patent/CN2502270Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20020724 Termination date: 20101109 |