CN107384341A - A kind of Oil/gas Well packing particle and its manufacture method - Google Patents
A kind of Oil/gas Well packing particle and its manufacture method Download PDFInfo
- Publication number
- CN107384341A CN107384341A CN201710604690.5A CN201710604690A CN107384341A CN 107384341 A CN107384341 A CN 107384341A CN 201710604690 A CN201710604690 A CN 201710604690A CN 107384341 A CN107384341 A CN 107384341A
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- oil
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- gas well
- ethene
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/40—Spacer compositions, e.g. compositions used to separate well-drilling from cementing masses
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F110/00—Homopolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
- C08F110/02—Ethene
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/10—Nanoparticle-containing well treatment fluids
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- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
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Abstract
The present invention relates to a kind of Oil/gas Well packing particle and its manufacture method, Oil/gas Well packing particle be average grain diameter be 0.07~0.80mm, density be 0.90~1.25g/cm3Polyethylene particle.The packing effect of Oil/gas Well packing particle is preferable, and manufacturing cost is relatively low, and the cost of oil-gas mining is reduced while the oil and gas production of Oil/gas Well is improved.
Description
Technical field
The invention belongs to oil-gas mining field, and in particular to a kind of Oil/gas Well packing particle and its manufacture method.
Background technology
During oil-gas mining, due to the anisotropism of reservoir and the difference of profit physical property, in Oil/gas Well especially
In the serious horizontal well of bottom water coning, it readily along the high flow channel of permeability enters pit shaft to stratum water electrode in advance, and
The major part of pit shaft or even whole spaces are occupied rapidly, causes that the oil and gas production of Oil/gas Well declines, moisture content is substantially increased.Herein
In the case of, segmentation adjusts Flow Technique to arise at the historic moment.The technology adjusts stream to rely primarily at present by adjusting stream and segmentation two parts technological maheup
Adjust the traffic managers such as stream water-control sieve tube to complete, and be segmented and rely primarily on packer progress mechanical packing or fill out packing particle
It is charged in annular space to be insulated to complete.
It is more preferable than using the effect of packer using packing particle for the packing effect in fragmentation technique.It is but existing
It is vitreous hollow bead mostly to have the packing particle used in technology, the density of vitreous hollow bead for 0.5~
1.8g/cm3, particle diameter 30um-1000um, because packing particle suffers from higher requirement, artificial hollow to density and particle diameter
The cost of glass marble is too big, it is difficult to applied in practice.Therefore, it is preferable how to produce a kind of packing effect, and manufacturing cost
Relatively low packing particle again, it is a urgent problem to be solved during the fragmentation technique of oil-gas mining is applied.
The content of the invention
Based on above mentioned problem, it is an object of the invention to provide a kind of Oil/gas Well packing particle and its manufacture method, the oil gas
The packing effect of well packing particle is preferable, and manufacturing cost is relatively low.
According to the first aspect of the invention, there is provided a kind of Oil/gas Well insulates particle, and the Oil/gas Well packing particle is grain
Footpath is 0.07~0.80mm, density is 0.90~1.25g/cm3Polyethylene particle.
Preferably, the density of the polyethylene particle is 1.00g/cm3。
Preferably, the polyethylene particle be shaped as it is spherical.
Oil/gas Well packing particle according to the first aspect of the invention, compared to vitreous hollow of the prior art
For grain, it is easier to manufacture and cost is lower.In addition, when Oil/gas Well insulates particle with insulating filling for particle for carrying Oil/gas Well
When filling out liquid has roughly the same density, Oil/gas Well packing particle can suspend naturally in packing fluid so that Oil/gas Well insulates
Particle is easier as packing fluid flows.Consider the factors such as reservoir pressure coefficient, the density of the packing fluid of use is generally 0.90
~1.25g/cm3, therefore the density of Oil/gas Well packing particle is also configured as 0.90~1.25g/cm3.In the prior art, polyethylene
The density of particle is generally 0.70~1.5g/cm3, particle diameter is generally selected in the range of 0.05~1.0mm.Applicant is by a large amount of
Experiment learn, when the density of polyethylene particle is 0.90~1.25g/cm3, and particle diameter is in 0.07~0.80mm scope,
Both will not because of Oil/gas Well insulate particle particle diameter it is excessive and influence packing effect, again will not because of Oil/gas Well insulate particle grain
Footpath is too small and it is increased the cost in actual production.Therefore, Oil/gas Well of the invention packing particle is playing preferable packing
While effect, and manufacturing cost is reduced to greatest extent.
In addition, the manufacturing of the Oil/gas Well packing particle of the present invention is simple and convenient, and it is safe and reliable, it is easy to widely
Popularization and application.
According to the second aspect of the invention, there is provided a kind of manufacture method of Oil/gas Well packing particle, it includes following step
Suddenly：
Step 1, using gaseous ethene as primary raw material, adjusted under assigned temperature and specified pressure by initiator and density
Whole dose of progress polymerisation, makes the ethene form vinyl polymer molten polymer in reaction zone；
Step 2, separated in the mixture by the vinyl polymer molten polymer from the raw material of polymerisation with product
Out；
Step 3, the vinyl polymer molten polymer feeding comminutor obtained will be separated, to form average grain diameter as 0.07
~0.80mm, density are 0.90~1.25g/cm3Polyethylene particle.
Preferably, the step 2 includes：
Step 2.1, the raw material of polymerisation is separated with the mixture of product in first that operating pressure is 25~30Mpa
First time separation is carried out in machine, to cause the unreacted ethene to be separated with the vinyl polymer molten polymer；
Step 2.2, will be mixed containing the ethene and the vinyl polymer molten polymer after first time separates
Compound carries out second in the second separator that operating pressure is 0.3~0.4Mpa and separated, with cause the ethene with it is described
Vinyl polymer molten polymer further separates.
Preferably, in the step 2.1, the ethene being separated after separating for the first time is sent back to the reaction
Area's raw material as the polymerisation again；In the step 2.2, the ethene being separated after second of separation is first
It is sent back to raw material of the reaction zone again as polymerisation again after supercharging.
Preferably, before the step 2.1 is carried out, first the mixture of the raw material of the polymerisation and product is carried out
Decompression and cooling so that the pressure of the raw material of the polymerisation and the mixture of product is reduced to 46~54Mpa, and temperature reduces
To 242~258 DEG C.
Preferably, in the step 1, the initiator is oxygen, dicyclohexyl peroxidating carbonic acid hydrogen ester, tert-butyl group mistake
Decylate, two caprinoyls, di-tert-butyl peroxide or TBHP；The density adjusting agents are propylene, propane or fourth
Alkene.
Preferably, the assigned temperature is 150~300 DEG C, and the specified pressure is 150~300Mpa.
The manufacture method of Oil/gas Well packing particle according to the second aspect of the invention manufactures first aspect present invention
Oil/gas Well insulates particle, and the packing effect of the Oil/gas Well packing particle of manufacture is preferable, and manufacturing cost is relatively low, can improve
The cost of oil-gas mining is reduced while the oil and gas production of Oil/gas Well.
Brief description of the drawings
, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical scheme of the prior art
The required accompanying drawing used is briefly described in embodiment or description of the prior art.In all of the figs, similar element
Or part is typically identified by similar reference.In accompanying drawing, each element or part might not be drawn according to the ratio of reality.
Fig. 1 is the schematic diagram that particle packing Oil/gas Well is insulated according to the Oil/gas Well of the present invention；
Fig. 2 is the flow chart for the manufacture method that particle is insulated according to the Oil/gas Well of the present invention.
Description of reference numerals：1st, the borehole wall；2nd, stream water-control sieve tube tubing string, 3, Oil/gas Well packing particle are adjusted；4th, packer；5th, fill
Action.
Embodiment
The embodiment of technical solution of the present invention is described in detail below in conjunction with accompanying drawing.Following examples are only used for
Clearly illustrate technical scheme, therefore be only used as example, and the protection model of the present invention can not be limited with this
Enclose.
Particle is insulated the invention provides a kind of Oil/gas Well, Oil/gas Well packing particle is average grain diameter for 0.07~
0.80mm, density are 0.90~1.25g/cm3Polyethylene particle.So-called Oil/gas Well refers to the oil of broad sense in oil-gas field development
Gas well, including oil well, gas well, injection well etc..
Oil/gas Well packing particle according to the first aspect of the invention, compared to vitreous hollow of the prior art
For grain, it is easier to manufacture and cost is lower.In addition, when Oil/gas Well insulates particle with insulating filling for particle for carrying Oil/gas Well
When filling out liquid has roughly the same density, Oil/gas Well packing particle can suspend naturally in packing fluid so that Oil/gas Well insulates
Particle is easier as packing fluid flows.Consider the factors such as reservoir pressure coefficient, the density of the packing fluid of use is generally 0.90
~1.25g/cm3, therefore the density of Oil/gas Well packing particle is also configured as 0.90~1.25g/cm3.In the prior art, polyethylene
The density of particle is generally 0.70~1.5g/cm3, particle diameter is generally selected in the range of 0.05~1.0mm.Applicant is by a large amount of
Experiment learn, when the density of polyethylene particle is 0.90~1.25g/cm3, and particle diameter is in 0.07~0.80mm scope,
Both will not because of Oil/gas Well insulate particle particle diameter it is excessive and influence packing effect, again will not because of Oil/gas Well insulate particle grain
Footpath is too small and it is increased the cost in actual production.Therefore, Oil/gas Well of the invention packing particle is playing preferable packing
While effect, and manufacturing cost is reduced to greatest extent.
Fig. 1 is the schematic diagram according to the Oil/gas Well packing particle packing Oil/gas Well of the present invention.As shown in figure 1, using above-mentioned
Oil/gas Well packing particle is as follows to insulate the operating method of Oil/gas Well：First, stream water-control sieve tube tubing string 2 will be adjusted to deliver to oil well horizontal
Section, annular space is formed between the borehole wall 1 and tune stream water-control sieve tube tubing string 2；Then, base sealed packer 4 and open fill device 5, will take
Packing fluid with Oil/gas Well packing particle carries out direct circulation so that Oil/gas Well packing particle is admitted to annular space and stratum；Finally,
When annular space progressively by grain packing consolidation after, above carry device for filling 5.In addition, so-called direct circulation refers to carry Oil/gas Well envelope
Device for filling 5 is transported to from oil pipe every the packing fluid of particle, then is transported to annular space.
In addition, when oil well needs to carry out to repair the row's of returning operation of operation on follow-up, its concrete operation method is as follows：First,
Deblocking packer 4, return row for Oil/gas Well packing particle and form passage；Then, direct circulation is carried out using workover fluid so that in annular space
Fill closely knit Oil/gas Well packing particle to be progressively loosened, be finally taken to ground with workover fluid.Equally, it is so-called when the row of returning operates
Direct circulation also refer to workover fluid and be transported to device for filling 5 from oil pipe, then be transported to annular space..
The Oil/gas Well packing particle of the present invention is used as carrier by instruments such as packer, device for filling, and by the use of packing fluid
The annular space for needing to insulate or stratum etc. are entered in Oil/gas Well.In stowing operation, a part of Oil/gas Well packing particle is with filling
Fill out liquid and enter stratum, another part Oil/gas Well insulates particle by adjusting the stop for flowing water-control sieve tube to be left on annular space, with filling
The continuous progress of work, annular space progressively will insulate grain packing consolidation by Oil/gas Well.Even if found in follow-up production process
Flow channel is still had in annular space, Oil/gas Well packing particle can also block up with the further movement of fluid in Oil/gas Well
Flow channel is filled in, realizes effective packing of annular space.After the grain packing of Oil/gas Well packer is in horizontal segment, fluid is by the borehole wall to tune
Flow water-control sieve tube tubing string distance is short, contact area is big, therefore ensure that fluid along the unimpeded of Oil/gas Well longitudinal flow；And fluid
Along the flow distance of transverse direction is long, annular space cross-sectional area is small, fluid lateral flow resistance is big, make fluid transverse direction flowing by
Suppress.Therefore, Oil/gas Well packing particle can play a part of effectively insulating, and improving conventional packer segmentation series has
The problem of limit, packing less effective, so as to improve the oil and gas production of Oil/gas Well.
For economical reasons, it is water that packing fluid, which is typically selected, therefore the density of polyethylene particle is preferably 1.00g/
cm3Left and right, such design cause Oil/gas Well packing particle has generally to adapt to, can be applied to most Oil/gas Well.Separately
Outside, polyethylene particle is preferably spherical so that Oil/gas Well packing particle well-balanced property is good, sorting is good, and more hold
Easily as packing fluid flows.In addition, the gap between each Oil/gas Well packing particle is smaller, the effect of packing is also more preferable.
Fig. 2 is the flow chart for the manufacture method that particle is insulated according to the Oil/gas Well of the present invention.As shown in Fig. 2 the manufacturer
Method comprises the following steps：
Step 1, using gaseous ethene as primary raw material, adjusted under assigned temperature and specified pressure by initiator and density
Whole dose of progress polymerisation, makes ethene form vinyl polymer molten polymer in reaction zone；
Step 2, vinyl polymer molten polymer is separated from the mixture of the raw material of polymerisation and product；
Step 3, the vinyl polymer molten polymer feeding comminutor obtained will be separated, to form average grain diameter as 0.07
~0.80mm, density are 0.90~1.25g/cm3Polyethylene particle.
Above-mentioned assigned temperature is 150~300 DEG C, and specified pressure is 150~300Mpa.
Oil/gas Well packing particle, the oil gas at manufacture are manufactured according to the manufacture method of the Oil/gas Well of present invention packing particle
The packing effect of well packing particle is preferable, and manufacturing cost is relatively low, can be reduced while the oil and gas production of Oil/gas Well is improved
The cost of oil-gas mining.In addition, the manufacture method of the Oil/gas Well packing particle of the present invention, by the agent for changing density adjusting agents
Amount, it becomes possible to the density of Oil/gas Well packing particle is adjusted, and by changing the setting of the granulation diameter to comminutor, it becomes possible to adjust
Save particle diameter.Therefore the Oil/gas Well packing particle of different densities and particle diameter can be produced as needed, can be employed
In the Oil/gas Well of different operating modes.
In the present embodiment, step 2 also includes：
Step 2.1, the raw material of polymerisation is separated with the mixture of product in first that operating pressure is 25~30Mpa
First time separation is carried out in machine, to cause unreacted ethene to be separated with vinyl polymer molten polymer；
Step 2.2, by the mixture containing ethene and vinyl polymer molten polymer after first time separates in work
Make to carry out second of separation in the second separator that pressure is 0.3~0.4Mpa, make it that it is poly- that ethene and vinyl polymer melt
Compound further separates.
Because ethene can not be fully converted into vinyl polymer molten polymer in polymerisation, therefore in polymerisation
Product in be mixed with a large amount of ethene, so needing to be separated ethene with vinyl polymer molten polymer.In addition, first
The operating pressure of secondary separation is higher than the operating pressure of second of separation, and its purpose is to further by unreacted ethene and its
In contained impurity separated, especially preferably wax residue contained in ethene can be separated.
In step 2.1, the ethene that is separated is sent back to reaction zone and is used as polymerisation again after separating for the first time
Raw material, in step 2.2, second separate after the ethene that is separated first pass through after supercharger is pressurized and be sent back to again
The reaction zone raw material as polymerisation again.
The conversion ratio of ethene is not high in the polymerization, be mixed to ethene in vinyl polymer molten polymer compared with
It is more, it is therefore desirable to unreacted ethylene gas is re-fed into reactor after separation and reacted, to avoid the wave of ethene
Take, reduce production cost.Further, since the pressure for carrying out polymerisation in the reaction region is higher, and after second separates
The pressure for the ethene isolated is relatively low, in order to avoid the ethene of low pressure is sent directly into reaction zone, first using supercharger to second
The ethene isolated after secondary separation is pressurizeed, it is possible to increase the efficiency of polymerisation in reaction zone.
Pulse valve and cooler are installed in the exit of reaction zone, before step 2.1 is carried out, first by polymerisation
The mixture of raw material and product is depressured by pulse valve, its pressure is reduced to 46~54Mpa, and enter by cooler
Row cooling, makes its temperature be reduced to 242~258 DEG C.Because the temperature and pressure that polymerisation is carried out in reaction zone is all higher, first
The mixture of the raw material of polymerisation and product is depressured and cooler and separated again after being cooled by the way that pulse valve is good,
The safe operation of the first separator can be ensured, while can also improve separative efficiency.
In step 3,5.0Mpa or so is pressurized into the vinyl polymer molten polymer after comminutor, first passes through and change
Wire stitcher so that the impurity in vinyl polymer molten polymer is further filtered.Hereafter, vinyl polymer molten polymer exists
Enter multiple passages that diameter tapers into comminutor after shunting, and accelerate flowing in passage, finally from comminutor
Discharge end flows out, by the pelletizing hydroecium for entering comminutor after the nib on discharge end with wire.Vinyl polymer melt polymerization
After the water cooling that thing is 50~70 DEG C by temperature in pelletizing hydroecium, it is the poly- of 0.07~0.80mm to be cut into particle diameter by revolution cutting knife
Ethene particle.Wherein, polyethylene particle specific particle size as needed can be by changing the granulation diameter of comminutor
Set to be adjusted.
In the present embodiment, it is oxygen or organic peroxide that the initiator used in step 1, which can be selected, organic mistake
Oxide such as dicyclohexyl peroxidating carbonic acid hydrogen ester, the tert-butyl group cross decylate, two caprinoyls, di-tert-butyl peroxide or the tert-butyl group
Hydrogen peroxide etc. can be used as initiator.According to the needs of polymerisation, initiator can also be several organic peroxides
The mixture either mixture of air and organic peroxide, mainly consider whether to carry when initiator in selection
The efficiency of high polymerisation and the factor such as whether it is easily obtained.In addition, density adjusting agents can be selected as propylene, propane or fourth
Alkene.
In this application, term " first ", " second " etc. are only used for describing purpose, and it is not intended that instruction or hint phase
To importance or the implicit quantity for indicating indicated technical characteristic.In the description of the invention, " multiple " are meant that two
More than individual, unless otherwise specifically defined.
Although by reference to preferred embodiment, invention has been described, is not departing from the situation of the scope of the present invention
Under, various improvement can be carried out to it and part therein can be replaced with equivalent.Especially, as long as being rushed in the absence of structure
Prominent, the every technical characteristic being previously mentioned in each embodiment can combine in any way.The invention is not limited in text
Disclosed in specific embodiment, but all technical schemes including falling within the scope of the appended claims.
Claims (9)
1. a kind of Oil/gas Well insulates particle, it is characterised in that the Oil/gas Well packing particle is particle diameter for 0.07~0.80mm, close
Spend for 0.90~1.25g/cm3Polyethylene particle.
2. Oil/gas Well according to claim 1 insulates particle, it is characterised in that the density of the polyethylene particle is
1.00g/cm3。
3. Oil/gas Well according to claim 1 or 2 insulates particle, it is characterised in that the polyethylene particle is shaped as
It is spherical.
4. a kind of manufacture method of Oil/gas Well packing particle, it is characterised in that comprise the following steps：
Step 1, using gaseous ethene as primary raw material, initiator and density adjusting agents are passed through under assigned temperature and specified pressure
Polymerisation is carried out, the ethene is formed vinyl polymer molten polymer in reaction zone；
Step 2, the vinyl polymer molten polymer is separated from the mixture of the raw material of polymerisation and product；
Step 3, the vinyl polymer molten polymer obtained will be separated and be sent into comminutor, using formed particle diameter as 0.07~
0.80mm, density are 0.90~1.25g/cm3Polyethylene particle.
5. manufacture method according to claim 4, it is characterised in that the step 2 includes：
Step 2.1, by the mixture of the raw material of polymerisation and product in the first seperator that operating pressure is 25~30Mpa
First time separation is carried out, to cause the unreacted ethene to be separated with the vinyl polymer molten polymer；
Step 2.2, by the mixture containing the ethene with the vinyl polymer molten polymer after first time separates
Carry out separating for second in the second separator that operating pressure is 0.3~0.4Mpa, to cause the ethene and the ethene
Macromolecule molten polymer further separates.
6. manufacture method according to claim 5, it is characterised in that in the step 2.1, divided after separating for the first time
The ethene separated out is sent back to raw material of the reaction zone again as the polymerisation；In the step 2.2, the
The ethene being separated after secondary separation is sent back to original of the reaction zone again as polymerisation again after first passing through supercharging
Material.
7. manufacture method according to claim 6, it is characterised in that, first will be described poly- before the step 2.1 is carried out
The mixture of the raw material and product that close reaction is depressured and cooled so that the raw material of the polymerisation and the mixture of product
Pressure be reduced to 46~54Mpa, temperature is reduced to 242~258 DEG C.
8. according to the manufacture method any one of claim 4-7, it is characterised in that in the step 1, the initiation
Agent is oxygen, dicyclohexyl peroxidating carbonic acid hydrogen ester, the tert-butyl group cross decylate, two caprinoyls, di-tert-butyl peroxide or tertiary fourth
Base hydrogen peroxide；The density adjusting agents are propylene, propane or butylene.
9. manufacture method according to claim 8, it is characterised in that the assigned temperature is 150~300 DEG C, the finger
Constant-pressure is 150~300Mpa.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710604690.5A CN107384341A (en) | 2017-07-24 | 2017-07-24 | A kind of Oil/gas Well packing particle and its manufacture method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710604690.5A CN107384341A (en) | 2017-07-24 | 2017-07-24 | A kind of Oil/gas Well packing particle and its manufacture method |
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