CN210798955U - Deep well casing external annulus double-stage monitoring sampler - Google Patents
Deep well casing external annulus double-stage monitoring sampler Download PDFInfo
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- CN210798955U CN210798955U CN201921925234.1U CN201921925234U CN210798955U CN 210798955 U CN210798955 U CN 210798955U CN 201921925234 U CN201921925234 U CN 201921925234U CN 210798955 U CN210798955 U CN 210798955U
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 39
- 238000001125 extrusion Methods 0.000 claims abstract description 44
- 230000006835 compression Effects 0.000 abstract description 6
- 238000007906 compression Methods 0.000 abstract description 6
- 238000009434 installation Methods 0.000 abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 57
- 239000004568 cement Substances 0.000 description 11
- 230000006378 damage Effects 0.000 description 10
- 230000008961 swelling Effects 0.000 description 9
- 238000006073 displacement reaction Methods 0.000 description 6
- 238000002347 injection Methods 0.000 description 6
- 239000007924 injection Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 239000011435 rock Substances 0.000 description 5
- 238000011084 recovery Methods 0.000 description 4
- 238000005070 sampling Methods 0.000 description 4
- 238000011088 calibration curve Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 230000005465 channeling Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 206010033799 Paralysis Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013480 data collection Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000003467 diminishing effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001595 flow curve Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
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Abstract
The utility model relates to a deep well cover outer annular space doublestage monitoring sample thief, this kind of deep well cover outer annular space doublestage monitoring sample thief includes: the main pipe is vertical, the lower end of the main pipe is connected with each upper-layer branch pipe and each lower-layer branch pipe, each upper-layer branch pipe is obliquely arranged around the main pipe along the circumferential direction of the main pipe, the lower port of each upper-layer branch pipe is positioned at a mudstone reference level, and the lower port of each lower-layer branch pipe is positioned below the bottom end of the mudstone reference level; the upper layer branch pipe is divided into a thick upper layer branch pipe and a thin upper layer branch pipe, and a low pressure-resistant extrusion switch is installed at the lower port of the thick upper layer branch pipe to form a high-flow upper layer collector; the high resistance to compression extrusion switch of thin upper branch pipe lower port installation forms little flow upper collector, and the high resistance to compression extrusion switch of lower port installation of lower floor's branch pipe forms lower floor's collector. The utility model discloses after the main collector in upper strata is scrapped by the extrusion, the inferior collector of lower floor still can work to probably continue the empty situation of monitoring well lower cover outer ring.
Description
Technical Field
The utility model relates to a quality of water sample and parameter collector who uses in the empty monitoring technology of well cover outer loop in the oil recovery field, concretely relates to deep well cover outer loop double-stage monitoring sample thief.
Background
In the later period of development of old oil fields, high-pressure water injection, polymer injection, ternary drive, thermal recovery and other strong recovery means are generally adopted. Although the recovery efficiency is improved, well cementation cement sheath cracks, stratum water channeling, stratum swelling and displacement are easily caused to extrude a shaft sleeve, the number of abandoned wells for casing damage major repair is rapidly increased, and even a sheet casing damage area with hundreds of wells is formed. Therefore, the method has great significance for predicting casing damage, taking relevant measures in advance to avoid or slow down the occurrence of casing damage accidents and ensuring the efficient production of old oil fields by monitoring the water quality, pressure, flow, stratum swelling displacement and other condition changes of the underground casing annulus in real time on line.
One of the more important devices in the monitoring and sampling system is the downhole casing external annulus water sample and water parameter collector. The primary water quality sampling and water parameter (pressure, flow rate, etc.) collector is a fine flow guide pipe with the lower end connected with a filter screen cover, which can filter water quality and can conduct water pressure. However, the method has a plurality of defects in the downhole casing damage monitoring.
1. The extrusion direction of the stratum swelling and displacement to the casing cannot be judged;
2. the extrusion force of the stratum swelling on the casing cannot be judged;
3. after the water hole of the sampler is blocked by the stratum swelling, the ground device at the other end of the thin flow guide pipe cannot acquire any data of the outer annular space of the underground sleeve. At this time, the casing damage monitoring system (underground and ground) is completely paralyzed, and the underground data monitoring work such as water quality sampling and pressure monitoring cannot be continued.
Disclosure of Invention
The utility model aims at providing a deep well cover outer annular space doublestage monitoring sample thief, this kind of deep well cover outer annular space doublestage monitoring sample thief is used for solving present cover outer annular space water sample in the pit, water parameter collector water hole stifled back of dying, and the ground device will not gather the problem of the any data of cover outer annular space in the pit.
The utility model provides a technical scheme that its technical problem adopted is: this kind of deep well cover outer annulus double-stage monitoring sample thief includes: the main pipe is vertical, the lower end of the main pipe is connected with each upper-layer branch pipe and each lower-layer branch pipe, each upper-layer branch pipe is obliquely arranged around the main pipe along the circumferential direction of the main pipe, the lower end opening of each upper-layer branch pipe is positioned at a mudstone reference level, the lower-layer branch pipe is vertical, and the lower end opening of the lower-layer branch pipe is positioned below the bottom end of the mudstone reference level; the upper layer branch pipe is divided into a thick upper layer branch pipe and a thin upper layer branch pipe, and a low pressure-resistant extrusion switch is installed at the lower port of the thick upper layer branch pipe to form a high-flow upper layer collector; the high resistance to compression extrusion switch of thin upper branch pipe lower port installation forms little flow upper collector, and the high resistance to compression extrusion switch of lower port installation of lower floor's branch pipe forms lower floor's collector.
In the scheme, one thick upper layer branch pipe, one thin upper layer branch pipe and one lower layer branch pipe are arranged. One large-flow upper layer collector, one small-flow upper layer collector and one lower layer collector are formed. The flow distribution can be determined by adopting the pipe diameter, the flow distribution of the large-flow upper layer collector is 60 percent of the total flow, the distribution flow of the small-flow upper layer collector is 20 percent, and the distribution flow of the lower layer collector is 20 percent.
The utility model discloses following beneficial effect has:
1. the utility model discloses a double-deck multichannel is according to flow ratio distribution, calibrates out double-deck collector stress-meeting an emergency (change in pores) -flow variation relation curve in advance before dispatching from the factory, and the pressure of extrusion sleeve pipe is inferred according to ground flow conduit flow variation, and its purpose can be according to ground flow and pressure variation speculative underground stratum swelling displacement condition.
2. The utility model discloses realize that the outer annular space multilevel multichannel data collection station of cover in the pit (water sample, water pressure, flow, rock stratum extrusion force isoparametric).
3. The utility model discloses can judge out the water of well cementation cement sheath interface crack condition or external high pressure water layer according to the water sample quality of water change of the fine honeycomb duct monitoring in ground and scurry the empty condition of cover outer loop.
4. The utility model discloses pressure and flow change in the thin honeycomb duct according to ground monitoring, calibration curve before dispatching from the factory compared with the collector, can surmise that mud rock stratum slides in the pit to the extruded harm degree of collector and to sheathed tube extrusion force.
5. The utility model discloses because of main collector comprises a plurality of branch collectors of the different anti extrusion grades in different positions along sleeve pipe circumference, can judge the damage order of the branch collector in different positions by pressure flow's change to estimate out the stratum and remove the extrusion direction to the sheathed tube.
6. The utility model discloses after two bleeder all are scrapped by the extrusion at upper main collector, the inferior collector of lower floor still can water sampling, survey flow pressure and flow to probably continue the empty situation of monitoring well cover outer ring down.
Drawings
FIG. 1 is a schematic view of the structure of the middle-depth well casing external annular space two-stage monitoring sampler of the present invention;
fig. 2 is a schematic view of the device used in the deep well casing outer annulus double-stage monitoring sampler monitoring method of the present invention.
In the figure: 1, a main pipe; 2, thick upper layer branch pipes; 3 thin upper layer branch pipes; 4-1 low pressure resistant extrusion switch; 4-2, an upper-layer high-pressure-resistant extrusion switch; 5, a lower-layer high-compression-resistance extrusion switch; 6 lower layer branch pipes; 7 a mudstone reference layer; 8, cementing a cement sheath; 9 perforating holes; 10 well head; 11 sets of external monitoring fine flow guide pipe valve sets; 12 sets of external pressure gauges; 13 sets of external leakage flow meter; 14 oil-water layer; 15 surface cement sealing rings; 16 sleeves; 17 a well wall; 18 outer annular spaces; 19 thin draft tube; 20 a deep well casing outer annulus double-stage monitoring sampler.
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 double-stage monitoring sampler comprises: the main pipe 1 is vertical, the lower end of the main pipe 1 is connected with each upper-layer branch pipe and each lower-layer branch pipe 6, each upper-layer branch pipe is obliquely arranged around the main pipe 1 along the circumferential direction of the main pipe 1, the lower port of each upper-layer branch pipe is positioned at the position of a mudstone reference layer 7, the lower-layer branch pipe 6 is vertical, and the lower port of the lower-layer branch pipe 6 is positioned below the position of the mudstone reference layer 7; the upper layer branch pipe is divided into a thick upper layer branch pipe 2 and a thin upper layer branch pipe 3, and a low pressure-resistant extrusion switch 4-1 is installed at the lower port of the thick upper layer branch pipe 2 to form a large-flow upper layer collector; the lower port of the thin upper branch pipe 3 is provided with an extrusion switch with high compressive strength, which is an upper high compressive strength extrusion switch 4-2 to form a small flow upper collector, while the lower port of the lower branch pipe 6 is provided with an extrusion switch with high compressive strength, which is a lower high compressive strength extrusion switch 5 to form a lower collector.
In this embodiment, one thick upper branch pipe 2, one thin upper branch pipe 3, and one lower branch pipe 6 form one large-flow upper collector, one small-flow upper collector, and one lower collector, and the flow distribution of the large-flow upper collector is 60% of the total flow, the distribution of the small-flow upper collector is 20%, and the distribution of the lower collector is 20%. This is a double layer three channel structure.
The flow of the thick upper layer branch pipe 2 accounts for 60%, the material structure strength of the corresponding large-flow upper layer collector is designed to be low in pressure resistance, namely the collector branch pipe is deformed and blocked when small extrusion force is applied, and the fluid passing capacity of the thick upper layer branch pipe 2 is reduced to zero from the maximum (60% of the total flow). When the collector is extruded and deformed, the collector is equivalent to a flow regulating switch.
On the ground, the extrusion deformation condition of the high-flow upper collector can be deduced through the change of the flow in the thin guide pipe 19, and the extrusion force on the sleeve 16 during the stratum swelling and displacement can be deduced according to the stress-strain relation set before the product leaves the factory.
The flow of the fine upper layer branch pipe 3 accounts for 20 percent, and the material structure strength of the corresponding small-flow upper layer collector is designed to be high in compression resistance. Only when further receiving high strength extrusion this branch collector just takes place to warp, begins to block thin upper branch pipe 3, along with the increase of extrusion force, warp more seriously, the flow of this flow bleeder also by big diminishing. Compared with the calibration curve of (extrusion) pressure-strain (deformation) - (deformation) flow before the collector leaves the factory, the larger extrusion force of the stratum on the casing 16 can be deduced from the flow change at the high extrusion force stage.
The flow distribution ratio of the lower layer branch pipe 6 is 20%, the water inlet hole is downward, the lower layer collector is positioned below the bottom end of the mudstone layer, and the flow branch pipe cannot be extruded when the mudstone layer swells. After the two branch collectors on the upper layer are extruded and deformed and closed, the collector on the lower layer can still conduct and transmit hydraulic parameters of annular fluid.
With reference to fig. 2, the monitoring method of the deep well casing outer annulus double-stage monitoring sampler comprises the following steps:
firstly, calibrating stress-strain (hole change) -flow change relation curves of an extrusion switch with low compressive strength and an extrusion switch with high compressive strength before delivery, and calibrating a relation curve between bearing pressure-deformation-conduction flow before delivery.
And secondly, the main pipe 1 is connected with the lower port of the thin guide pipe 19, the thin guide pipe is placed in the oil-water well casing outer annulus 18, the deep well casing outer annulus double-stage monitoring sampler 20 is placed in the water injection well casing outer annulus 18, each upper-layer branch pipe is placed to the position corresponding to the mudstone reference layer 7, the lower-layer branch pipe 6 is placed to the position below the bottom end of the mudstone reference layer 7, the thin guide pipe 19 is upwards connected to the ground, and the casing outer monitoring thin guide pipe valve group 11, the casing outer pressure measuring meter 12, the casing outer leakage flow meter 13 and the like are installed.
A plurality of (or two) multi-branch collectors with different compression-resistant grades are arranged at the depth of a mudstone reference layer, a large-flow upper layer collector and a small-flow upper layer collector are lowered to the position corresponding to the mudstone reference layer 7, a lower layer collector is lowered to the position below the mudstone reference layer 7, and when a mudstone swelling layer continuously extrudes the main-flow pressure sampler, the flow conductivity of the deformed sampler is reduced, so that the extrusion degree of the mudstone layer to the casing 16 is known; the lower layer collector is used for continuously monitoring the parameters of the annular fluid after the mudstone layer swells and blocks the high-flow upper layer collector and the low-flow upper layer collector. The part of the thin guide pipe 19 on the ground is provided with an external monitoring thin guide pipe valve group 11, an external pressure measuring meter 12, an external leakage flow meter 13 and the like. The condition of the crack of the interface of the well cementation cement sheath 8 or the condition of the outer annular space 18 of the sleeve into which the external high-pressure water layer water flees can be judged according to the water quality change of the water sample monitored by the ground fine flow guide pipe; according to the pressure and flow change in the fine flow guide pipe 19 monitored on the ground, the damage degree of the underground shale layer to the extrusion of the collector and the extrusion force to the casing 16 can be conjectured by contrasting with the calibration curve; the underground monitoring instrument is composed of a plurality of large-flow upper-layer collectors and small-flow upper-layer collectors with different anti-extrusion grades in different circumferential directions of the casing 16, and the damage sequence of the branch collectors in different directions can be judged according to the change of pressure flow, so that the extrusion direction of the movement of the rock stratum to the casing 16 can be estimated.
The outer annular space 18 of the sleeve is sealed with the ground surface through a surface cement sealing ring 15, the lower end of the outer annular space 18 of the sleeve is provided with a well cementation cement sheath 8, the well cementation cement sheath 8 is provided with a perforation hole 9, an oil-water layer 14 is communicated with a sleeve 16 through the perforation hole 9, and the outer monitoring thin flow guide pipe valve group 11, the outer pressure measuring meter 12 and the outer leakage flow meter 13 of the sleeve are arranged at a ground wellhead 10. The annular space between the oil-water well wall 17 and the casing 16 is the annular space outside the casing.
And thirdly, injecting water into the water injection well at high pressure, wherein the injected water penetrates through the well cementation cement sheath 8 through the perforation holes 9 and is injected into the oil-water layer 14, in the process, the injected water permeates into the outer annular space 18 through the interface cracks of the well cementation cement sheath 8, in addition, other high-pressure water layer water outside the water injection well flees into the outer annular space 18, the high-pressure leaked water and the outer stratum flee into the water to soak the shale reference layer, the high-pressure leaked water and the outer stratum flee into the water to form the outer annular space seepage water, and the water sample, the pressure and the flow of the seepage water in the outer annular space are transmitted to the ground through the fine flow.
And fourthly, directly obtaining underground water quality samples and changes, underground water pressure and changes, underground water flow and changes through online data measurement by an external sleeve monitoring fine flow guide pipe valve group 11, an external sleeve pressure measuring meter 12 and an external sleeve leakage flow meter 13 on the ground, and monitoring the extrusion degree condition of the mud rock layer after swelling to the sleeve 16 in real time through the corresponding relation between the structural change and the stress of the main flow sampler.
And fifthly, detecting the seepage condition of the cement well cementation ring interface crack and the stratum external water channeling condition by 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 fine flow guide pipe 19 and the pressure change.
The high-flow upper layer collector and the low-flow upper layer collector are used for deducing the extrusion force of the mudstone displacement in the annular space 18 outside the underground casing on the casing 16 according to the pressure-deformation-flow curve chart calibrated before delivery and the pressure and flow change in the thin flow guide pipe 19 measured on the ground; the thick upper layer branch pipes 2 and the thin upper layer branch pipes 3 are distributed in different upward directions of the periphery of the casing pipe 16, so that the extrusion direction of the mud rock to the casing pipe 16 can be roughly judged;
after the high-flow upper layer collector and the low-flow upper layer collector are extruded and scrapped, the lower layer secondary collector can still continue to collect water samples, measure flow pressure and flow, and realize continuous monitoring of the parameters of the outer annular space on the ground.
Claims (2)
1. The utility model provides a deep well cover outer annulus double-stage monitoring sample thief which characterized in that: the deep well sleeve outer annulus double-stage monitoring sampler comprises a main pipe (1), at least two upper-layer branch pipes and a lower-layer branch pipe (6), wherein the main pipe (1) is vertical, the lower end of the main pipe (1) is connected with each upper-layer branch pipe and the lower-layer branch pipe (6), each upper-layer branch pipe is obliquely arranged around the main pipe (1) along the circumferential direction of the main pipe (1), the lower port of each upper-layer branch pipe is positioned at a mudstone reference layer (7), the lower-layer branch pipe (6) is vertical, and the lower port of the lower-layer branch pipe (6) is positioned below the bottom end of the mudstone reference layer (7); the upper layer branch pipe is divided into a thick upper layer branch pipe (2) and a thin upper layer branch pipe (3), a low pressure-resistant extrusion switch (4-1) is installed at the lower port of the thick upper layer branch pipe (2), and a large-flow upper layer collector is formed; the high pressure-resistant extrusion switch is installed at the lower port of the thin upper-layer branch pipe (3) to form a small-flow upper-layer collector, and the high pressure-resistant extrusion switch is installed at the lower port of the lower-layer branch pipe (6) to form a lower-layer collector.
2. The deep well casing outer annulus double-stage monitoring sampler according to claim 1, characterized in that: the number of the thick upper layer branch pipes (2) is one, the number of the thin upper layer branch pipes (3) is one, the number of the lower layer branch pipes (6) is one, so that one large-flow upper layer collector, one small-flow upper layer collector and one lower layer collector are formed; the flow distribution of the high-flow upper layer collector is 60% of the total flow, the distribution flow of the low-flow upper layer collector is 20%, and the distribution flow of the lower layer collector is 20%.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921925234.1U CN210798955U (en) | 2019-11-10 | 2019-11-10 | Deep well casing external annulus double-stage monitoring sampler |
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| CN201921925234.1U CN210798955U (en) | 2019-11-10 | 2019-11-10 | Deep well casing external annulus double-stage monitoring sampler |
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| CN210798955U true CN210798955U (en) | 2020-06-19 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110617063A (en) * | 2019-11-10 | 2019-12-27 | 夏惠芬 | Deep well casing external annulus two-stage monitoring sampler and monitoring method thereof |
| CN112727455A (en) * | 2020-12-22 | 2021-04-30 | 华南理工大学 | Device for rapidly washing underground water |
-
2019
- 2019-11-10 CN CN201921925234.1U patent/CN210798955U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110617063A (en) * | 2019-11-10 | 2019-12-27 | 夏惠芬 | Deep well casing external annulus two-stage monitoring sampler and monitoring method thereof |
| CN110617063B (en) * | 2019-11-10 | 2024-01-05 | 宝鸡市凯顺海陆装备科技有限公司 | Deep well sleeve outer annular space two-stage monitoring sampler and monitoring method thereof |
| CN112727455A (en) * | 2020-12-22 | 2021-04-30 | 华南理工大学 | Device for rapidly washing underground water |
| CN112727455B (en) * | 2020-12-22 | 2021-08-06 | 华南理工大学 | Device for rapidly washing underground water |
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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 |