CN109779578A - Adaptive horizontal well control water conservancy project tool based on grease density contrast and eddy flow - Google Patents
Adaptive horizontal well control water conservancy project tool based on grease density contrast and eddy flow Download PDFInfo
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Abstract
The invention discloses the adaptive horizontal well control water conservancy project tools based on grease density contrast and eddy flow, wing plate is equipped in first entrance and second entrance, interstitial hole connects different-diameter cylindrical body and the concatenated pipeline of sphere, the hole cylindrical cross-section A connects crescent runner with the hole cylindrical cross-section B, pipeline and crescent runner are connected with sphere, oil water mixture is flowed into from first entrance and second entrance, it is separated by way of wing plate, oil flows into different-diameter cylindrical body and the concatenated pipeline of sphere from interstitial hole, water enters crescent runner from the hole cylindrical cross-section A and the hole cylindrical cross-section B, hence into the sphere of choke zone, radial oil stream, tangential water flow meets and sphere bottom water is caused to form vortex, stop the entrance of water.The beneficial effects of the invention are as follows can delay the time of occurrence of horizontal well water cone, efficiently control water advance by leaps and bounds in pit shaft, pressure difference and downhole well fluid flow velocity in balance pit shaft.
Description
Technical field
The invention belongs to oil-gas field development technical field, it is related to the adaptive horizontal well control based on grease density contrast and eddy flow
Water conservancy project tool.
Background technique
Currently used oil field development well type mainly has: straight well, directional well, horizontal well, extended reach well etc..Different well type
With different adaptation range and use value；But with high content of technology, highly efficient and productive oil field development well type or horizontal well,
It is needed under particular surroundings with extended reach well technology.The environment of underground is dynamic change during horizontal well or extended reach well recover the oil,
The type of fluid, the density and viscosity of fluid, oil reservoir pressure and temperature all changing, so flowing item in well completion design
Part is most difficult to prediction.Horizontal well usually faces some challenges, such as: 1) since horizontal well in segments is with-toe effect generation
Uneven wellbore pressure difference, is easy to happen water and advances by leaps and bounds in pit shaft (water cone), and 2) due to the irregularities of shaft bottom oil pool distribution, it is impossible to
It is all Homogeneous Reservoir, some places pressure is big, flow velocity is fast, and some places pressure is small, flow velocity is slow；Cause: crude oil seepage flow oil inlet pipe
Interior pressure, speed are unbalanced, influence crude output and recovery ratio；3) side, the presence of bottom water and water flooding, so that
Downhole oil, water distribution are uneven, oil well early water breakthrough, and crude oil water content is high, further influence crude output and recovery ratio.When containing
When water rises, water cone occurs too early, the appearance of Yao Yanhuan horizontal well water cone during oil recovery improves oil recovery factor, extends oil
Well Production Life then needs oil reservoir more uniform and converges to pit shaft, more to control the oily pressure entered in oil pipe with water, flow velocity and contain
Amount mainly reduces the inflow velocity and content of water.
Summary of the invention
The purpose of the present invention is to provide the adaptive horizontal well control water conservancy project tool based on grease density contrast and eddy flow, the present invention
Beneficial effect be the time of occurrence that can delay horizontal well water cone, efficiently control water advance by leaps and bounds in pit shaft, balance pit shaft internal pressure
Difference and downhole well fluid flow velocity extend the oil well production service life, improve oil recovery factor.
The technical scheme adopted by the invention is that there are two mutually on the periphery of shunting zone including shunting zone, choke zone
Independent first entrance and second entrance, shunting zone are set there are three hole, interstitial hole, the hole cylindrical cross-section A and the hole cylindrical cross-section B, the
Wing plate is equipped in one entrance and second entrance, interstitial hole connects different-diameter cylindrical body and the concatenated pipeline of sphere, cylindrical cross-section A
Hole connects crescent runner with the hole cylindrical cross-section B, and pipeline and crescent runner are connected with sphere, and oil water mixture enters from first
Mouth and second entrance flow into, and separate by way of wing plate, oily from interstitial hole inflow different-diameter cylindrical body and the concatenated pipeline of sphere, water
Enter crescent runner from the hole cylindrical cross-section A and the hole cylindrical cross-section B, hence into the sphere of choke zone, radial oil stream, tangential water
Stream, which meets, causes sphere bottom water to form vortex, stops the entrance of water.
Further, when water is advanced by leaps and bounds in pit shaft, grease flows into the control water conservancy project and has shunting zone, oily because viscosity is high, density is low, by
The influence of centrifugal force, into interstitial hole, with the variation of grease flow resistance, oil will enter section by the interstitial hole of Diverging area
The concatenated pipeline of different-diameter cylindrical body and sphere on the top Liu Qu radially flows into the sphere of choke zone simultaneously along pipeline low velocity
By the effect limited compared with small flow, finally flowed into next section of associated oil pipe from control water conservancy project tool choke zone outlet；Water is because close
Degree is high, viscosity is low, is influenced by centrifugal force, in two holes of entering tool side, flows to choke zone lower part from lateral aperture rapidly
Crescent runner, crescent runner exit and sphere connection, Higher velocities tangentially flow into the sphere of choke zone and by larger streams
Rising limit system causes hydropexis in the sphere inward eddy of choke zone, as a result reduces surface water produced quantity.
Detailed description of the invention
Fig. 1 is tool top view；
Fig. 2 is tool side view；
Fig. 3 is tool front view；
Fig. 4 is tool sectional view.
In figure, 1. first entrances, 2. second entrances, 3. interstitial holes, 4. holes cylindrical cross-section A, 5. holes cylindrical cross-section B, 6. wings
Plate, 7. pipelines, 8. crescent runners, 9. spheres, 10. outlets.
Specific embodiment
The present invention is described in detail With reference to embodiment.
The present invention is as shown in Figures 1 to 4, and control water conservancy project tool is divided into two regions: shunting zone, choke zone.The circumference of shunting zone
There are two mutually independent first entrance 1 and second entrance 2 on face, shunting zone sets that there are three hole, interstitial holes 3, the hole cylindrical cross-section A
The hole 4 and cylindrical cross-section B 5, oil water mixture are flowed into from first entrance 1 and second entrance 2, are separated by way of wing plate 6, oily from interstitial hole
3 flow into different-diameter cylindrical bodies and the concatenated pipeline 7 (choke zone) of sphere, water from the hole cylindrical cross-section A 4 and the hole cylindrical cross-section B 5 into
Enter crescent runner 8, hence into the sphere 9 of choke zone, radial oil stream, tangential water flow, which are met, causes 9 bottom water of sphere to be formed
Vortex, stops the entrance of water.
Different fluid (grease) enters the hole that shunting zone will be selected automatically in cylindrical cross-section by its flowing property
And flow into the different basins of choke zone.Water often selects longer path because viscosity is lower, enters the hole cylindrical cross-section A 4 naturally
In the hole cylindrical cross-section B 5, the crescent runner 8 of choke zone lower part is then flowed into, and the oil of high viscosity, low-density automatically selects
Shorter path flows into the different-diameter cylindrical body and the concatenated pipeline 7 of sphere of choke zone from interstitial hole 3.Due to the density of water
It is high；The density of oil is low, therefore oil descends interface motion on the water.
Choke zone is made of different-diameter cylindrical body and the concatenated pipeline 7 of sphere and crescent runner 8.Different-diameter cylinder
Body and the concatenated pipeline 7 of sphere are mainly local resistance loss runner to the limitation property of fluid, and crescent runner 8 belongs to friction
Drag losses runner.Since local losses depends on fluid density, flow velocity and local loss coefficient, and friction loss depends on stream
Body viscosity, flow velocity and path shape, therefore the density and viscosity of fluid is the particular fluid for determining to pass through shunting zone difference path
The key factor of ratio.
When work, when advancing by leaps and bounds in pit shaft there is a phenomenon where water (water cone), grease flows into control water conservancy project and has shunting zone, and oil is because of viscosity
Height, density are low, are influenced by centrifugal force, into interstitial hole 3.With the variation of grease (fluid) flow resistance, oil passes through shunting
The interstitial hole 3 in region is by the different-diameter cylindrical body and the concatenated pipeline 7 of sphere that enter choke zone top along pipeline low velocity
Radial direction flows into the sphere 9 of choke zone and by the effect limited compared with small flow, under finally flowing into from control water conservancy project tool choke zone outlet 10
In one section of associated oil pipe.
Water is influenced, in two holes of entering tool side, rapidly from lateral aperture because density height, viscosity are low by centrifugal force
The crescent runner 8 of choke zone lower part is flowed to, the outlet of crescent runner 8 and 9 connection of sphere, Higher velocities tangentially flow into throttling
The sphere 9 in area is simultaneously limited 9 inward eddy of sphere for causing hydropexis in choke zone by larger outflow, as a result reduces surface water extraction
Amount.
When horizontal well well section water ceaselessly flows into control water conservancy project tool, since the fluid (You Heshui) flowed into control water conservancy project tool exists
The flowing frictional resistance of the horizontal well in segments is gradually increasing, and region reservoir horizontal well segmentation fluid flows into the stream of tool or oil pipe
Dynamic property is deteriorated, and the fluid flow that the fluid of the segmentation flows into control water conservancy project tool can be reduced, but it is former to have no effect on other horizontal well well sections
The normal production of oil can play the role of allowing oil by limiting the automatic control water of the inflow of water.Table 1 is Numerical Experiment
Result data table
Table 1
It is also an advantage of the present invention that:
1) it automatically adjusts, does not need any control or electronic device to carry out control water operation, reduce power supply and maintenance cost；
2) save the cost, the design of tool category pure mechanic structure, processing and fabricating cost is low, more important is by control the advancing by leaps and bounds of water, prolong
Long oil well Production Life improves oil recovery factor, substantially increases oil extraction economic benefit.3) movement-less part, nothing are designed
The adaptive horizontal well control water conservancy project tool for needing additional TT&C system, realizes that water function is controlled in shaft bottom；4) it is based on grease density contrast, realizes stream
Dynamic self adaptive control improves intelligent Well Completion level.
The above is only not to make limit in any form to the present invention to better embodiment of the invention
System, any simple modification that embodiment of above is made according to the technical essence of the invention, equivalent variations and modification,
Belong in the range of technical solution of the present invention.
Claims (2)
1. the adaptive horizontal well control water conservancy project tool based on grease density contrast and eddy flow, it is characterised in that: including shunting zone, throttling
Area, there are two mutually independent first entrance and second entrance on the periphery of shunting zone, shunting zone is set there are three hole, intermediate
Wing plate is equipped in hole, the hole cylindrical cross-section A and the hole cylindrical cross-section B, first entrance and second entrance, interstitial hole connects different-diameter circle
Cylinder and the concatenated pipeline of sphere, the hole cylindrical cross-section A connect crescent runner, pipeline and crescent runner with the hole cylindrical cross-section B
It is connected with sphere, oil water mixture is flowed into from first entrance and second entrance, is separated by way of wing plate, and oil flows into not from interstitial hole
With diameter cylinders and the concatenated pipeline of sphere, water enters crescent runner from the hole cylindrical cross-section A and the hole cylindrical cross-section B, thus
Into the sphere of choke zone, radial oil stream, tangential water flow, which are met, causes sphere bottom water to form vortex, stops the entrance of water.
2. having according to the adaptive horizontal well control water conservancy project based on grease density contrast and eddy flow described in claim 1, it is characterised in that:
When water is advanced by leaps and bounds in pit shaft, grease flows into the control water conservancy project and has shunting zone, and oil is influenced because viscosity is high, density is low by centrifugal force, into
Enter interstitial hole, with the variation of grease flow resistance, oil will enter the difference on choke zone top by the interstitial hole of Diverging area
Diameter cylinders and the concatenated pipeline of sphere radially flow into the sphere of choke zone along pipeline low velocity and are limited by compared with small flow
Effect, finally from control water conservancy project tool choke zone outlet flow into next section of associated oil pipe in；Water is high because of density, viscosity is low, by
The influence of centrifugal force in two holes of entering tool side, flows to rapidly the crescent runner of choke zone lower part, crescent moon from lateral aperture
Shape runner exit and sphere connection, Higher velocities, which tangentially flow into the sphere of choke zone and limited by larger outflow, leads to hydropexis
Sphere inward eddy in choke zone, as a result reduces surface water produced quantity.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910233357.7A CN109779578A (en) | 2019-03-26 | 2019-03-26 | Adaptive horizontal well control water conservancy project tool based on grease density contrast and eddy flow |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910233357.7A CN109779578A (en) | 2019-03-26 | 2019-03-26 | Adaptive horizontal well control water conservancy project tool based on grease density contrast and eddy flow |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111779468A (en) * | 2020-05-07 | 2020-10-16 | 中国石油天然气股份有限公司 | Horizontal well inclined shaft section vortex water drainage gas production device and water drainage gas production method |
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