CN210798950U - Multi-parameter online monitoring device for deep well casing external annular thin guide pipe - Google Patents
Multi-parameter online monitoring device for deep well casing external annular thin guide pipe Download PDFInfo
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- CN210798950U CN210798950U CN201921925233.7U CN201921925233U CN210798950U CN 210798950 U CN210798950 U CN 210798950U CN 201921925233 U CN201921925233 U CN 201921925233U CN 210798950 U CN210798950 U CN 210798950U
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- thin pipe
- sample thief
- mudstone
- main flow
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- 238000012806 monitoring device Methods 0.000 title claims abstract description 14
- 238000002347 injection Methods 0.000 claims description 15
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- 238000012544 monitoring process Methods 0.000 claims description 14
- 210000005239 tubule Anatomy 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 41
- 238000001125 extrusion Methods 0.000 abstract description 9
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- 239000004568 cement Substances 0.000 description 11
- 238000000034 method Methods 0.000 description 8
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- 238000005259 measurement Methods 0.000 description 2
- 230000008723 osmotic stress Effects 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 239000003513 alkali Substances 0.000 description 1
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- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009530 blood pressure measurement Methods 0.000 description 1
- 230000005465 channeling Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000008398 formation water Substances 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
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- 239000004094 surface-active agent Substances 0.000 description 1
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Abstract
The utility model relates to a deep well cover outer annulus thin pipe multi-parameter on-line monitoring device, it includes thin pipe, the main flow sample thief, inferior flow sample thief, the lower extreme installation inferior flow sample thief of thin pipe, the main flow sample thief is installed on thin pipe and is located inferior flow sample thief top, thin pipe is transferred to and is injected into the well cover outer loop aloft, the main flow sample thief is transferred to the position that the mudstone reference layer corresponds, inferior flow sample thief is transferred to the position under the mudstone reference layer, thin pipe connection has installed the cover and has monitored thin pipe valves outside the cover to subaerial part, cover ground monitoring devices such as pressure gage and cover seepage flow meter outside pressure gage. The utility model discloses the mainstream sample thief sets up in the mudstone reference bed, when the mudstone swelling layer moved and constantly extrudees this mainstream pressure sample thief, will make the water conservancy diversion ability variation after the sample thief warp to learn the mudstone and move the extrusion degree to the sheathed tube.
Description
Technical Field
The utility model relates to an empty monitoring technology of well cover outer loop in the oil recovery field, concretely relates to deep well cover outer loop annular space thin pipe multi-parameter on-line monitoring device.
Background
For old oil fields which have been exploited for many years, primary oil recovery by original natural energy (spontaneous injection) exploitation and secondary oil recovery by supplementing formation energy by water injection are carried out. In order to further extract the residual oil in the reservoir and improve the oil recovery rate of crude oil, old oil fields are injected with polymer, surfactant, alkali and other three-element flooding and CO injection2Tertiary oil recovery modes such as injecting microorganisms and injecting hot steam.
The oil layer and the mudstone interlayer osmotic stress are unbalanced due to the viscosity difference of the externally injected liquid of the oil layer, high pressure, large injection amount, strong permeability, uneven heat and cold, long injection time and unbalanced oil layer permeability.
Because the difference of the water seepage expansion coefficient of an oil layer and a mud rock layer is large, the mud rock layer swells, shifts and dislocates under the action of unbalanced osmotic stress of an injected fluid, the casing pipe is extruded to deform underground, even the casing pipe is broken, the oil-water well is overhauled and taken or scrapped, the loss of each well is nearly millions of yuan, and the influenced crude oil yield is not included.
And because the pressure of the external injection liquid is increased, the well cementation cement sheath of the injection well is easy to leak with the stratum to generate cracks and lose the sealing effect, and at the moment, high-pressure water returns upwards to a reference shale layer (about 800 meters underground in Daqing oil fields), so that the swelling, extrusion or casing pipe fracture of the shale layer is accelerated.
Over the last decade, oil fields have developed multiple zones of casing damage. In hundreds of wells in a serious casing damage area, nearly 60 percent of wells have casing damage, most of the extrusion or fracture positions are in a mudstone reference layer, and the direct loss reaches billions of yuan.
At present, a lot of casing damage monitoring researches and applications are carried out, and most of the researches and applications are used for monitoring damages such as cement sheath leakage, mudstone layer swelling, casing extrusion and the like based on indirect testing modes, stratum unstable well testing, acoustic wave, electromagnetic and other well logging technologies. These methods are not only costly, but also complex to operate.
Researchers also put the optical fiber conductor into the well bottom along with the casing, receive signals on the ground through the underground pressure sensor and the optical fiber transmission, and therefore monitor the pressure change of the annular space outside the underground casing. The optical fiber method can directly monitor the pressure outside the sleeve, and makes technological progress, but the method has large one-time investment, complicated optical fiber maintenance and data processing, inconvenient use and incapability of monitoring the change conditions of formation water quality and the like, so the method only serves as experimental research and cannot be popularized and applied.
Therefore, it is necessary and urgent to develop a simple, low-cost, effective and reliable casing damage monitoring and preventing process.
Disclosure of Invention
The utility model aims at providing a deep well cover outer annular space thin pipe multi-parameter on-line monitoring device, this kind of deep well cover outer annular space thin pipe multi-parameter on-line monitoring device is used for solving present cover and decreases monitoring device or method cost higher, perhaps operates more complicated problem.
The utility model provides a technical scheme that its technical problem adopted is: the deep well casing outer annulus thin pipe multi-parameter online monitoring device comprises a thin pipe, a main flow sampler and a sub-flow sampler, wherein the sub-flow sampler is installed at the lower end of the thin pipe, the main flow sampler is installed on the thin pipe and located above the sub-flow sampler, the thin pipe is lowered into the outer annulus of an injection well casing, the main flow sampler is lowered to the position corresponding to a mudstone reference layer, the sub-flow sampler is lowered to the position below the mudstone reference layer, and the part, connected to the ground, of the thin pipe is provided with a casing outer monitoring thin pipe valve group, a casing outer pressure gauge, a casing outer leakage flow gauge and other ground monitoring devices.
The utility model discloses following beneficial effect has:
1. the utility model discloses the outer annular space of cover is gone into along with the sleeve pipe to thin pipe and sample thief, realizes that long-term quality of water sample, pressure variation, flow variation and layer move four parameter on-line measurement such as extrusion sample thief atress analysis.
2. The utility model discloses the mainstream sample thief sets up in the mudstone reference bed, when the mudstone swelling layer moved and constantly extrudees this mainstream pressure sample thief, will make the water conservancy diversion ability variation after the sample thief warp to learn the mudstone and move the extrusion degree to the sheathed tube.
3. The utility model discloses quality of water parameter sample thief falls into the sub-flow sample thief that corresponds shale's mainstream sample thief and mudstone layer lower extreme, is for can also monitor annular space fluid parameter behind mudstone layer swelling stopper mainstream hole.
4. The utility model discloses a water injection well quality of water, original stratum quality of water and thin pipe water sampling quality of water, pressure change analysis, detectable cement well cementation ring interface crack seepage condition, the external water in stratum scurry the condition.
5. By utilizing the underground external parameter online monitoring system, the research and the application in the aspects of underground stable well testing and unstable well testing can be further realized.
Drawings
Fig. 1 is a schematic diagram of the structure of the middle device of the present invention.
In the figure: 1, sleeving a sleeve; 2, drilling a well wall; 3, sleeving an outer annular space; 4 a thin catheter; 5 a main flow sampler; a 6-time flow sampler; 7 a mudstone reference layer; 8, cementing a cement sheath; 9 perforating holes; 10 well head; 11 sets of external monitoring thin catheter valve sets; 12 sets of external pressure gauges; 13 sets of external leakage flow meter; 14 oil-water layer; 15 surface cement sealing ring.
Detailed Description
The invention will be further described with reference to the accompanying drawings:
as shown in fig. 1, the deep well casing outer annulus fine conduit multi-parameter online monitoring device comprises a fine conduit 4, a main flow sampler 5 and a sub flow sampler 6, wherein the sub flow sampler 6 is installed at the lower end of the fine conduit 4, the main flow sampler 5 is installed on the fine conduit 4 and is positioned above the sub flow sampler 6, the fine conduit 4 is lowered into an injection well casing outer annulus 3, the main flow sampler 5 is lowered to a position corresponding to a mudstone reference layer 7, and the sub flow sampler 6 is lowered to a position below the mudstone reference layer 7, when a mudstone swelling layer moves to continuously extrude the main flow pressure sampler, the flow conductivity of the sampler after deformation is deteriorated, so that the extrusion degree of the mudstone layer to the casing 1 is known; the main flow sampler 5 and the sub flow sampler 6 at the lower end of the mudstone layer are used for monitoring parameters of annular fluid after swelling of the mudstone layer blocks the main flow hole. The part of the thin conduit 4 on the ground is provided with an external monitoring thin conduit valve group 11, an external pressure measuring meter 12, an external leakage flow meter 13 and the like.
The sleeve outer ring space 3 is sealed with the ground through a surface cement sealing ring 15, a well cementation cement ring 8 is arranged at the lower end of the sleeve outer ring space 3, the well cementation cement ring 8 is provided with a perforation, an oil-water layer 14 is communicated with the sleeve 1 through a perforation hole 9, and a sleeve outer monitoring thin guide pipe valve group 11, a sleeve outer pressure measuring meter 12 and a sleeve outer leakage flow meter 13 are arranged at a ground wellhead 10. The annular space between the casing 1 and the well wall 2 is the outer annular space 3.
The monitoring method of the deep well casing external annular thin pipe multi-parameter online monitoring device comprises the following steps:
firstly, connecting a main flow sampler 5, a secondary flow sampler 6 and a fine guide pipe 4, and lowering the main flow sampler 5, the secondary flow sampler 6 and the fine guide pipe into the outer annular space of the injection well casing along with the casing 1, wherein the main flow sampler 5 is lowered to a position 7 of a mudstone reference layer, and the secondary flow sampler 6 is lowered to a position below the position 7 of the mudstone reference layer;
secondly, injecting water into the water injection well at high pressure through a well mouth 10, wherein the injected water penetrates through a well cementation cement sheath 8 through a perforation hole 9 and is injected into an oil water layer 14, in the process, the injected water permeates into an outer annular space 3 of the sleeve through a well cementation cement sheath interface crack, in addition, other high-pressure water layers outside the water injection well flee into the outer annular space 3 of the sleeve, the high-pressure leaked water and outer stratum flee into water to soak a shale reference layer, the high-pressure leaked water and the outer stratum flee into the water to form outer annular space of the sleeve to seep into the water, and water samples, pressure and flow of the seep into water of the outer annular space 3 of the sleeve are transmitted to a;
thirdly, online data measurement is carried out through an external casing monitoring fine conduit valve group 11, an external casing pressure measurement meter 12, an external casing leakage flow meter 13 and the like on the ground, underground water quality samples and changes, underground water pressure and changes, underground water flow and changes are directly obtained, and then the extrusion condition of the sleeve 1 after mudstone layer swelling is monitored in real time through the calibrated corresponding relation between the structural change and stress of the main flow sampler 5;
fourthly, detecting the seepage condition of the cement well cementation ring interface crack and the condition of the external water channeling of the stratum through analyzing the water quality of the water injection well, the water quality of the original stratum and the water quality of the water sample taken by the thin conduit 4 and the pressure change;
fifthly, the main flow sampler 5 is positioned on the mudstone reference layer 7, and when the mudstone swelling layer moves to continuously extrude the main flow sampler 5, the flow conductivity of the deformed main flow sampler 5 is deteriorated, so that the extrusion degree of the mudstone layer to the casing 1 is obtained; the sub-flow sampler 6 is positioned below the mudstone reference layer 7, and after the main flow sampler 5 is extruded and deformed, the sub-flow sampler 6 can still continue to work, so that the parameters of the sleeve outer annulus 3, including water quality, water pressure and the like, can be continuously monitored on the ground.
Claims (1)
1. The utility model provides a deep well cover outer annular space tubule multi-parameter on-line monitoring device which characterized in that: the deep well casing outer annulus thin pipe multi-parameter online monitoring device comprises a thin pipe (4), a main flow sampler (5), a secondary flow sampler (6) is installed at the lower end of the thin pipe (4), the main flow sampler (5) is installed on the thin pipe (4) and located above the secondary flow sampler (6), the thin pipe (4) is placed into an injection well casing outer annulus (3), the main flow sampler (5) is placed into a position corresponding to a mudstone reference layer (7), the secondary flow sampler (6) is placed into a position below the bottom end of the mudstone reference layer (7), the thin pipe (4) is connected to the ground, and an outer casing monitoring thin pipe valve group (11), an outer casing pressure measuring meter (12) and an outer casing leakage flow meter (13) are installed.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921925233.7U CN210798950U (en) | 2019-11-10 | 2019-11-10 | Multi-parameter online monitoring device for deep well casing external annular thin guide pipe |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921925233.7U CN210798950U (en) | 2019-11-10 | 2019-11-10 | Multi-parameter online monitoring device for deep well casing external annular thin guide pipe |
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| CN210798950U true CN210798950U (en) | 2020-06-19 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110671097A (en) * | 2019-11-10 | 2020-01-10 | 夏惠芬 | Deep well casing external annular thin pipe multi-parameter online monitoring device and monitoring method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110671097A (en) * | 2019-11-10 | 2020-01-10 | 夏惠芬 | Deep well casing external annular thin pipe multi-parameter online monitoring device and monitoring method |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20231218 Address after: 721300, Building A8, No.5 Binhe Road, Didian Village, Qianhe Town, High tech Development Zone, Baoji City, Shaanxi Province Patentee after: Baoji Kaishun Hailu Equipment Technology Co.,Ltd. Address before: Room 502, Gate 1, No. 3 Xueyuan Community, Development Road, Saltu District, Daqing City, Heilongjiang Province, 163000 Patentee before: Xia Huifen |
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| TR01 | Transfer of patent right |