CN106869880A - A kind of sandstone reservoir acidization tool - Google Patents
A kind of sandstone reservoir acidization tool Download PDFInfo
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- CN106869880A CN106869880A CN201510921016.0A CN201510921016A CN106869880A CN 106869880 A CN106869880 A CN 106869880A CN 201510921016 A CN201510921016 A CN 201510921016A CN 106869880 A CN106869880 A CN 106869880A
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- acidifying
- grade
- reservoir
- sandstone reservoir
- diverting agent
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
Abstract
The present invention provides a kind of sandstone reservoir acidization tool, including：According to the well-log information of sandstone reservoir, acidifying classification is carried out to sandstone reservoir；The thickness of the sandstone reservoir according to each acidifying grade, determines the consumption of the acid solution of the sandstone reservoir of each acidifying grade；The perforation quantity and preforation tunnel parameter of the sandstone reservoir according to each acidifying grade, determine the consumption of the diverting agent of the sandstone reservoir of each acidifying grade；Diverting agent is degradable under preset temperature；Prepad fluid, acid solution and displacement fluid are implanted sequentially according to the sandstone reservoir that acidifying grade order from high to low is each acidifying grade, and when the next stage sandstone reservoir of the sandstone reservoir for each acidifying grade injects prepad fluid, for the sandstone reservoir of each acidifying grade injects diverting agent, so that the partial completion eyelet of the sandstone reservoir of diverting agent filling each acidifying grade.The sandstone reservoir acidization tool that the present invention is provided, can carry out homogeneous acidification, and can reduce the cost of sandstone reservoir acidifying to sandstone reservoir.
Description
Technical field
The present invention relates to oil exploitation technology, more particularly to a kind of sandstone reservoir acidization tool.
Background technology
At present, to improve Oil ＆ Gas Productivity, the transformation degree of the sandstone reservoir near Oil/gas Well is improved, often
The remodeling method seen has acidifying transformation, fracturing reform.The method of existing acidifying house of correction is mechanic
Tool separate layer acid treatment, the machine tool separate layer acid treatment is specially：After being classified to sandstone reservoir, every
Downhole tool is set at oil pipe corresponding to the depth location of level sandstone reservoir, for example：Packer, bridging plug
Deng so that sandstone reservoir not at the same level is separated, being acidified step by step.
However, when being acidified to sandstone reservoir using above-mentioned machine tool separate layer acid treatment, due to needing
Downhole tool is set on the oil pipe of oil well so that it is relatively costly that sandstone reservoir is acidified, less efficient.
The content of the invention
The present invention provides a kind of sandstone reservoir acidization tool, is used to solve sandstone reservoir acidifying in the prior art
Relatively costly, less efficient problem.
To reach above-mentioned purpose, embodiments of the invention are adopted the following technical scheme that：
First aspect present invention provides a kind of sandstone reservoir acidization tool, including：
According to the well-log information of sandstone reservoir, acidifying classification is carried out to the sandstone reservoir；Wherein, per phase
The difference of the horizontal minimum principal stress of the sandstone reservoir of adjacent two acidifyings grade is more than or equal to the first predetermined threshold value；
The thickness of the sandstone reservoir according to each acidifying grade, it is determined that the sandstone storage of each acidifying grade
The consumption of the acid solution of layer；
The perforation quantity and preforation tunnel parameter of the sandstone reservoir according to each acidifying grade, determine institute
State the consumption of the diverting agent of the sandstone reservoir of each acidifying grade；Wherein, the preforation tunnel parameter includes
Preforation tunnel diameter and preforation tunnel depth, the diverting agent are degradable under preset temperature；
According to it is described each acidifying grade sandstone reservoir acid solution consumption, according to acidifying grade from height to
Low order is that the sandstone reservoir of each acidifying grade is implanted sequentially prepad fluid, acid solution and displacement fluid,
And the consumption of the diverting agent according to the sandstone reservoir of each acidifying grade, for it is described each be acidified etc.
It is the sandstone of each acidifying grade during the next stage sandstone reservoir injection prepad fluid of the sandstone reservoir of level
Reservoir injects diverting agent, so that the part of the sandstone reservoir of diverting agent filling each acidifying grade
Preforation tunnel, the partial completion eyelet is preforation tunnel of the liquid absorption more than the second predetermined threshold value.
As described above, the well-log information according to sandstone reservoir, acidifying point is carried out to the sandstone reservoir
Level, specifically includes：
According to the well-log information of the sandstone reservoir, each horizontal minimum principal stress of the sandstone reservoir is determined,
And static and dynamic correction is carried out to each horizontal minimum principal stress, obtain the horizontal minimum principal stress after each correction；
According to the well-log information of the sandstone reservoir, each perforation layer position of the sandstone reservoir is determined；
According to it is described each correction after horizontal minimum principal stress and the perforation layer position, it is determined that it is described each
The horizontal minimum principal stress after the corresponding correction of sandstone reservoir where perforation layer position；
The horizontal minimum principal stress after the corresponding correction of sandstone reservoir according to where described each perforation layer position
With first predetermined threshold value, acidifying classification is carried out to the sandstone reservoir.
As described above, the perforation quantity and Perforation of the sandstone reservoir of each acidifying grade described in the basis
Eye parameter, it is determined that the consumption of the diverting agent of the sandstone reservoir of each acidifying grade, specifically includes：
According to the preforation tunnel diameter, the diameter of the first diverting agent is determined, and according to described each acidifying
The perforation quantity and default coefficient of the sandstone reservoir of grade, it is determined that the sandstone storage of each acidifying grade
The quantity of the first diverting agent of layer；
According to the preforation tunnel diameter and the diameter of first diverting agent, the straight of the second diverting agent is determined
Footpath, and according to the preforation tunnel diameter, the preforation tunnel depth, it is described each acidifying grade sand
The bulk density of the quantity of the first diverting agent of rock reservoir, second diverting agent, it is determined that described each acid
Change the quality of the second diverting agent of the sandstone reservoir of grade；
According to the straight of the preforation tunnel diameter, the diameter of first diverting agent and second diverting agent
Footpath, determines the diameter of the 3rd diverting agent, and according to the preforation tunnel diameter, the preforation tunnel depth,
The sand of the quantity of the first diverting agent of the sandstone reservoir of each acidifying grade, each acidifying grade
The quality of the second diverting agent of rock reservoir, the real density of second diverting agent, the 3rd diverting agent
Real density, it is determined that it is described each acidifying grade sandstone reservoir the 3rd diverting agent quality.
As described above, the material of first diverting agent, second diverting agent and the 3rd diverting agent
It is identical.
As described above, the thickness of the sandstone reservoir according to each acidifying grade, it is determined that described each acid
Change the consumption of the acid solution of the sandstone reservoir of grade, specifically include：
The thickness of the sandstone reservoir according to each acidifying grade, it is determined that described each acidifying grade sandstone
The consumption of the consumption, the consumption of main body acid solution and rearmounted acid solution of the preposition acid solution of reservoir.
As described above, the consumption of the acid solution of the sandstone reservoir of each acidifying grade described in the basis, according to
Acidifying grade order from high to low be each acidifying grade sandstone reservoir be implanted sequentially prepad fluid,
Acid solution and displacement fluid, specifically include：
The consumption of the preposition acid solution of the sandstone reservoir according to each acidifying grade, the consumption of main body acid solution
With the consumption of rearmounted acid solution, be followed successively by each acidifying grade sandstone reservoir be injected separately into prepad fluid,
Preposition acid solution, main body acid solution, rearmounted acid solution and displacement fluid.
As described above, the consumption of the diverting agent of the sandstone reservoir of each acidifying grade described in the basis,
It is described every when injecting prepad fluid for the next stage sandstone reservoir of the sandstone reservoir of each acidifying grade
The sandstone reservoir injection diverting agent of individual acidifying grade, specifically includes：
The quantity of the first diverting agent of the sandstone reservoir according to each acidifying grade, the second diverting agent
The quality of quality and the 3rd diverting agent, in the next stage sandstone of the sandstone reservoir for each acidifying grade
During reservoir injection prepad fluid, be each acidifying grade sandstone reservoir be implanted sequentially the first diverting agent,
Second diverting agent, the 3rd diverting agent.
As described above, the sandstone reservoir is divided into the sandstone reservoir and the second acidifying grade of the first acidifying grade
Sandstone reservoir；
Then described sandstone reservoir for being followed successively by each acidifying grade be injected separately into prepad fluid, preposition acid solution,
Main body acid solution, rearmounted acid solution and displacement fluid, specifically include：
For described first acidifying grade sandstone reservoir be injected separately into prepad fluid, preposition acid solution, main body acid solution,
Rearmounted acid solution and displacement fluid, complete the acidifying of the sandstone reservoir of the first acidifying grade；
It is the sand of the second acidifying grade after the acidifying of sandstone reservoir of the first acidifying grade is completed
Rock reservoir injects prepad fluid, wherein, in the prepad fluid of the sandstone reservoir injection for being the second acidifying grade
The sandstone of the first diverting agent of the sandstone reservoir including the described first acidifying grade, the first acidifying grade
3rd diverting agent of the second diverting agent of reservoir, the sandstone reservoir of the first acidifying grade；
It is the sand reservoir difference of the second acidifying grade when the pressure of oil well reaches three predetermined threshold values
Preposition acid solution, main body acid solution, rearmounted acid solution and displacement fluid are injected, the sand of the second acidifying grade is completed
The acidifying of rock reservoir.
The sandstone reservoir acidization tool that the present invention is provided, by being acidified the sandstone reservoir acid of grade to each
After change, the big preforation tunnel of liquid absorption in the sandstone reservoir of each acidifying grade is carried out temporarily with diverting agent
Stifled mode, realizes the separate layer acid treatment to sandstone reservoir, reduces the operation of sandstone reservoir acidifying, carries
The efficiency of sandstone reservoir acidifying high, and while oily well capacity is improve, reduce sandstone reservoir
The cost of acidifying.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to reality
The accompanying drawing to be used needed for example or description of the prior art is applied to be briefly described, it should be apparent that, below
Accompanying drawing in description is only some embodiments of the present invention, for those of ordinary skill in the art,
On the premise of not paying creative work, other accompanying drawings can also be obtained according to these accompanying drawings.
The flow chart of the sandstone reservoir acidization tool embodiment one that Fig. 1 is provided for the present invention；
The flow chart of the sandstone reservoir acidization tool embodiment two that Fig. 2 is provided for the present invention.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the invention, and
It is not all, of embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art are without work
Go out the every other embodiment obtained under the premise of creative work, belong to the scope of protection of the invention.
The acidization tool that the present invention is provided, can carry out homogeneous acidification to the sandstone reservoir near oil well, with
Oily well capacity is improved, is particularly suited for the strong oil well of anisotropism, it is intended to solve sandstone in the prior art
Relatively costly, the less efficient, problem that acidifying is uneven of Reservoir Acidization.
Technical scheme is described in detail with specifically embodiment below.These have below
The embodiment of body can be combined with each other, may be in some embodiments for same or analogous concept or process
Repeat no more.
The flow chart of the sandstone reservoir acidization tool embodiment one that Fig. 1 is provided for the present invention, the present embodiment is related to
And be the detailed process being acidified to sandstone reservoir how according to the well-log information of sandstone reservoir, this
The method of embodiment is applied to oil well need to be particularly well-suited to the strong sand of anisotropism with the sandstone reservoir of acidifying
Rock reservoir, can reduce the acidifying cost of sandstone reservoir.As shown in figure 1, the method can include：
S101, the well-log information according to sandstone reservoir, acidifying classification is carried out to sandstone reservoir；Wherein, often
The difference of the horizontal minimum principal stress of the sandstone reservoir of two neighboring acidifying grade is more than or equal to the first default threshold
Value.
Specifically, after oil well finishing drilling, it is possible to according to sandstone reservoir (referred to as：Reservoir) well logging money
Material, acidifying classification is carried out to reservoir, during specific implementation, can according in the well-log information of reservoir most
Each perforating site in small horizontal principal stress parameter and reservoir, determines each perforation layer position place
Reservoir horizontal minimum principal stress, and then the reservoir according to where two perforations of arbitrary neighborhood layer position
Horizontal minimum principal stress between difference, by difference less than the first predetermined threshold value two perforations layer position
The reservoir division at place is same one-level acidifying grade, by difference more than or equal to the two of the first predetermined threshold value
Reservoir division where individual perforation layer position is different acidifying grades.Due to the storage where each perforation layer position
The corresponding horizontal minimum principal stress of layer has the consistent characteristic of the physical property for characterizing the reservoir, therefore, pass through
The mode of above-mentioned such classification, can by the same or like reservoir division of physical property in same one-level, and then
The same or like reservoir of physical property can be allowd while being acidified, reservoir is carried out with reaching
The purpose of even acidifying.Wherein, above-mentioned first predetermined threshold value can be according to the physical property of reservoir and user's request
It is determined that.
S102, the thickness that the sandstone reservoir of grade is acidified according to each, determine the sandstone of each acidifying grade
The consumption of the acid solution of reservoir.
Specifically, after acidifying classification is carried out to reservoir, it is possible to according to the classification, each acid is determined
Change the thickness of the reservoir of grade, and then the acid of the reservoir of each acidifying grade according to the thickness, can be determined
The consumption of liquid, wherein, how according to the thickness of reservoir, determine the consumption of the acid solution of reservoir, may refer to
Prior art.
S103, perforation quantity and preforation tunnel parameter that the sandstone reservoir of grade is acidified according to each, it is determined that
The consumption of the diverting agent of the sandstone reservoir of each acidifying grade；Wherein, preforation tunnel parameter includes Perforation
Eye diameter and preforation tunnel depth, diverting agent are degradable under preset temperature.
Specifically, after acidifying classification is carried out to reservoir, it is possible to according to the classification, each acid is determined
Change grade reservoir perforation quantity, and then can according to the perforation quantity and preforation tunnel parameter, it is determined that
The consumption of the diverting agent of the reservoir of each acidifying grade, during specific implementation, can be according to each acidifying grade
Reservoir perforation quantity, determine the quantity of temporarily stifled perforation required for the reservoir of each acidifying grade, together
When, can be according to the volume of preforation tunnel parameter determination preforation tunnel, in this manner it is possible to according to Perforation
Temporarily stifled perforation quantity, determines each acidifying etc. required for the reservoir of the volume of eye and each acidifying grade
The consumption of the diverting agent of the reservoir of level, wherein, the temporarily stifled preforation tunnel of above-mentioned needs can be big for liquid absorption
Preforation tunnel, the corresponding reservoir of the big perforation of these liquid absorptions be each acidifying grade reservoir in ooze
The good interval of permeability.
In the present embodiment, above-mentioned diverting agent can be filled in each acidifying etc. in the way of being fully populated with
In the big preforation tunnel of liquid absorption of the reservoir of level, to realize permeability in the reservoir to each acidifying grade
The temporary transient closure of good interval.Wherein, above-mentioned diverting agent can be according to the reality of the reservoir of required acidifying
Temperature determines, simultaneously as above-mentioned diverting agent is degradable diverting agent under preset temperature, it is not necessary to
The independent row of returning, therefore, it can reduce the preparatory process of Reservoir Acidization, improve the efficiency of Reservoir Acidization.
It should be noted that because above-mentioned diverting agent is the imbibition for temporarily blocking up the reservoir of each acidifying grade
The big preforation tunnel of amount, to avoid when to next stage Reservoir Acidization, the big preforation tunnel institute of the liquid absorption
Acid solution suction for being acidified next stage reservoir can be caused the perforated zone to be acidified by corresponding perforated zone
Excessive situation.After the reservoir to last acidifying grade is acidified, due to again without other acid
Changing the reservoir of grade needs acidifying, therefore, it can the reservoir without temporarily blocking up last acidifying grade,
That is, the consumption of the diverting agent of the reservoir of last acidifying grade is 0.
S104, the consumption that the acid solution of the sandstone reservoir of grade is acidified according to each, according to acidifying grade from height
Prepad fluid, acid solution and displacement fluid are implanted sequentially to the sandstone reservoir that low order is each acidifying grade, and
The consumption of the diverting agent of the sandstone reservoir according to each acidifying grade, in the sandstone storage for each acidifying grade
It is the sandstone reservoir injection diverting agent of each acidifying grade during the next stage sandstone reservoir injection prepad fluid of layer,
So that diverting agent fills the partial completion eyelet of the sandstone reservoir of each acidifying grade, partial completion eyelet is
Preforation tunnel of the liquid absorption more than the second predetermined threshold value.
Specifically, after it is determined that each is acidified the consumption of acid solution of the reservoir of grade and the consumption of diverting agent,
Just can be corresponding according to grade order from high in the end, the i.e. reservoir according to every one-level acidifying grade is acidified
Average level minimum principal stress order from small to large, is first the one-level of average level minimum principal stress minimum
Reservoir injection prepad fluid, acid solution and displacement fluid, are acidified, that is to say, that first to physical property most with to it
Good one-level reservoir is acidified.
After the one-level reservoir (be acidified grade highest one-level reservoir) best to physical property is acidified,
Next stage reservoir (the one-level reservoir that i.e. average level minimum principal stress is taken second place) after to this grade of reservoir
It is this grade of reservoir injection diverting agent while injection prepad fluid, is more than with temporarily blocking up liquid absorption in this grade of reservoir
The preforation tunnel of the second predetermined threshold value, i.e., temporarily block up the interval of good penetrability in this grade of reservoir, and the level is not blocked up temporarily
The preforation tunnel of liquid absorption difference, i.e., do not block up the interval of poor permeability in this grade of reservoir temporarily in sandstone reservoir, with
Allow that the interval of poor permeability in this grade of reservoir continues to be acidified again with next stage reservoir, with
This analogizes, until completing acidifying to being acidified elementary one-level reservoir.Wherein, the above-mentioned second default threshold
Value can determine according to the physical property of reservoir and user's request.
By way of the interval of this temporarily stifled good penetrability, the interval of good penetrability can be avoided from inhaling sour mistake
It is many, cause acidifying excessive, and the interval of poor permeability inhales that hypoacidity, causes to be acidified halfway problem,
It is achieved thereby that to the homogeneous acidification of reservoir, and then the connectedness of oil well and reservoir is improve, improve oil
Well capacity.
In the prior art, when stage acidizing is carried out to reservoir using machine tool separate layer acid treatment, it is necessary to
Downhole tool is set on the oil pipe of oil well so that Reservoir Acidization it is relatively costly, it is less efficient.And this reality
The sandstone reservoir acidization tool of example offer is provided, is acidified after the Reservoir Acidization of grade by each, only
The big preforation tunnel of the reservoir liquid absorption of each acidifying grade is carried out into temporarily stifled mode with diverting agent, so that it may
To realize the layering homogeneous acidification to reservoir, the preparatory process of Reservoir Acidization is reduced, improve oil well
Production capacity while, reduce the cost of Reservoir Acidization.
The present invention provide sandstone reservoir acidization tool, by each be acidified grade Reservoir Acidization it
Afterwards, the big preforation tunnel of liquid absorption in the reservoir of each acidifying grade is only carried out into temporarily stifled side with diverting agent
Formula, it is possible to realize the layering homogeneous acidification to reservoir, reduce the preparatory process of Reservoir Acidization, improves
The efficiency of Reservoir Acidization, while oily well capacity is improve, reduces the cost of Reservoir Acidization.
Sandstone reservoir acidization tool provided by the present invention will be carried out using a specific embodiment below
Specific description, in the present embodiment, the span of reservoir to be acidified is the vertical thickness of 113m, i.e. reservoir
It is 113m to spend, and the reservoir to be acidified is divided into two-stage, the reservoir of the respectively first acidifying grade and the
The reservoir of diacid grade；Above-mentioned diverting agent includes：First diverting agent, the second diverting agent and the 3rd are temporarily stifled
Agent., it is necessary to make some preparations, these preparations can include before specific implementation the method：
Obtain the well-log information of sandstone reservoir.The sandstone reservoir acidization tool embodiment two that Fig. 2 is provided for the present invention
Flow chart, as shown in Fig. 2 the method can include：
S201, the well-log information according to sandstone reservoir, determine each horizontal minimum principal stress of sandstone reservoir,
And static and dynamic correction is carried out to each horizontal minimum principal stress, obtain the horizontal minimum principal stress after each correction.
Specifically, the above-mentioned each horizontal minimum principal stress for how determining reservoir, and it is how minimum to level
Principal stress carries out static and dynamic correction, the horizontal minimum principal stress after being corrected, and may refer to prior art.
S202, the well-log information according to sandstone reservoir, determine each perforation layer position of sandstone reservoir.
Specifically, how above-mentioned determine each perforation layer position of reservoir according to the well-log information of reservoir, can be with
Referring to prior art.
Exemplary, it is assumed that determined according to well-log information, the perforation segment length 44m of the reservoir in the present embodiment,
According to the porosity on the reservoir of this 44m and permeability, can then determine each perforation layer position of the reservoir.
S203, horizontal minimum principal stress and perforation the layer position according to each after correcting, determine each perforation layer
The horizontal minimum principal stress after the corresponding correction of sandstone reservoir where position.
The minimum master of level after S204, the corresponding correction of sandstone reservoir according to where each perforation layer position should
Power and the first predetermined threshold value, acidifying classification is carried out to sandstone reservoir.
Specifically, level after reservoir corresponding correction where obtaining each perforation layer position it is minimum it is main should
After power, it is possible to the water after the corresponding correction of reservoir where determining two perforations layer position of arbitrary neighborhood
Difference between flat minimum principal stress, where the two perforations layer position by difference less than the first predetermined threshold value
Reservoir division is same one-level acidifying grade, the two perforations layer by difference more than or equal to the first predetermined threshold value
Reservoir division where position is different acidifying grades, to ensure to exist the same or like reservoir division of physical property
Same one-level, and then the same or like reservoir of physical property can be allowd while being acidified, it is right to reach
Reservoir carries out the purpose of homogeneous acidification.It should be noted that the accuracy in order to further improve classification,
It is above-mentioned to reservoir carry out acidifying classification when, can also refer to well-log information in each perforation layer position where
Reservoir porosity and permeability.
With continued reference to the example of above-mentioned S202, in the present embodiment, the reservoir of above-mentioned first acidifying grade
Thickness is 23 meters, and the thickness of the reservoir of the second acidifying grade is 21 meters, wherein, every meter has 16 perforations
Eyelet.Wherein, the water after the correction of the reservoir of the reservoir of above-mentioned first acidifying grade and the second acidifying grade
Difference between flat minimum principal stress is more than or equal to 3 MPas (i.e. the first predetermined threshold value is 3 MPas), the
The school of reservoir of the horizontal minimum principal stress less than the second acidifying grade after the correction of the reservoir of one acidifying grade
Horizontal minimum principal stress after just, that is to say, that the acidifying grade of the reservoir of the first acidifying grade is high, the
The acidifying grade of the reservoir of diacid grade is low.
S205, the thickness that the sandstone reservoir of grade is acidified according to each, determine each acidifying grade sandstone storage
The consumption of the consumption, the consumption of main body acid solution and rearmounted acid solution of the preposition acid solution of layer.
Specifically, with continued reference to the example of above-mentioned S204, after the fractionation, it is possible to according to above-mentioned first
The thickness of the reservoir of grade is acidified, consumption, the main acid of the preposition acid solution of the first acidifying grade reservoir is determined
The consumption of the consumption of liquid and rearmounted acid solution；The thickness of the reservoir according to the above-mentioned second acidifying grade, determines the
The consumption of the consumption, the consumption of main body acid solution and rearmounted acid solution of the preposition acid solution of diacid grade reservoir.Its
In, how according to the thickness of reservoir, determine the consumption of the preposition acid solution of reservoir, the consumption of main body acid solution and
The consumption of rearmounted acid solution, may refer to prior art.
S206, according to preforation tunnel diameter, determine the diameter of the first diverting agent, and according to each acidifying etc.
The perforation quantity and default coefficient of the sandstone reservoir of level, determine the of the sandstone reservoir of each acidifying grade
The quantity of one diverting agent.
Specifically, above-mentioned first diverting agent is the port being located at for temporary stifled preforation tunnel in reservoir, therefore,
The diameter of above-mentioned first diverting agent can be slightly less than preforation tunnel diameter, to allow that the first diverting agent enters
Inside entrance aperture eyelet, the port that preforation tunnel is located in reservoir is temporarily blocked up, will not be sucked into again
In runner inside reservoir.During specific implementation, the first diverting agent can be determined according to preforation tunnel diameter
Diameter, and according to each acidifying grade reservoir perforation quantity and default coefficient, determine each acid
Change the quantity of the first diverting agent of the reservoir of grade, wherein, above-mentioned default coefficient can be according to user's need
The physical property of summation reservoir is determined.
With continued reference to the example of above-mentioned S204, it is assumed that the above-mentioned a diameter of 9mm of preforation tunnel, then first is temporary
The diameter of blocking agent can be slightly less than 9mm, in this example, a diameter of 8mm of the first diverting agent.More than
State as a example by the reservoir of the first acidifying grade, the thickness of the reservoir of the first acidifying grade is 23 meters, wherein,
Every meter has 16 preforation tunnels, then the perforation quantity of the reservoir of above-mentioned first acidifying grade is 368, it is assumed that
Above-mentioned default coefficient is 0.5, it is determined that the quantity of the first diverting agent of the reservoir of above-mentioned first acidifying grade
It is 184.
S207, according to preforation tunnel diameter and the diameter of the first diverting agent, determine the diameter of the second diverting agent,
And according to preforation tunnel diameter, preforation tunnel depth, the sandstone reservoir of each acidifying grade it is first temporarily stifled
The bulk density of the quantity of agent, the second diverting agent, determines that the second of the sandstone reservoir of each acidifying grade is temporary
The quality of blocking agent.
Specifically, above-mentioned second diverting agent is for filling inside preforation tunnel, therefore, above-mentioned second is temporary
The diameter of blocking agent can be slightly less than or equal to the half of preforation tunnel diameter, and more than preforation tunnel diameter with
Difference between first diverting agent diameter, with cause the second diverting agent filling preforation tunnel inside effect compared with
It is good, can avoid flowing into reservoir in gap of second diverting agent between the first diverting agent and preforation tunnel again
Runner in.During specific implementation, can according to preforation tunnel diameter, the diameter of the first diverting agent, it is determined that
The diameter of the second diverting agent, with continued reference to the example of above-mentioned S206, it is assumed that above-mentioned preforation tunnel is a diameter of
9mm, a diameter of 8mm of the first diverting agent, then the diameter of above-mentioned second diverting agent can be more than 1mm,
And less than 4.5mm, then in this example, a diameter of 3mm of above-mentioned second diverting agent.
It is determined that after the diameter of the second diverting agent, it is possible to according to preforation tunnel diameter, user input
Quantity, the heap of the second diverting agent of preforation tunnel depth, the first diverting agent of the reservoir of each acidifying grade
Product density, determines the quality of the second diverting agent of the reservoir of each acidifying grade.With in above-mentioned example
As a example by the reservoir of one acidifying grade, it is assumed that a diameter of Φ of preforation tunnelPerforation, preforation tunnel depth is h, first
The quantity for being acidified the first diverting agent of the sandstone reservoir of grade is Q1, the bulk density of the second diverting agent is
ρPile up, the quality of the second diverting agent of the sandstone reservoir of the first acidifying grade is M2, then can be according to formula
(1) mass M of the second diverting agent of the sandstone reservoir of the first acidifying grade is determined2, the formula (1) tool
Body is as follows：
S208, the diameter according to preforation tunnel diameter, the diameter of the first diverting agent and the second diverting agent, really
The diameter of fixed 3rd diverting agent, and according to preforation tunnel diameter, preforation tunnel depth, each acidifying grade
Sandstone reservoir the first diverting agent quantity, second diverting agent of the sandstone reservoir of each acidifying grade
Quality, the real density of the second diverting agent, the real density of the 3rd diverting agent, determine each acidifying grade
Sandstone reservoir the 3rd diverting agent quality.
Specifically, above-mentioned 3rd diverting agent is for filling in preforation tunnel inside between the second diverting agent
Space, therefore, the diameter of above-mentioned 3rd diverting agent can be slightly less than or equal to the diameter of the second diverting agent
Half, and more than or equal to the difference between preforation tunnel diameter and the first diverting agent diameter, to cause the 3rd
Diverting agent be filled in the space between the second diverting agent effect preferably, can avoid again the 3rd diverting agent from
In gap between first diverting agent and preforation tunnel in the runner of inflow reservoir.During specific implementation, can be with
According to preforation tunnel diameter, the diameter of the first diverting agent, the second diverting agent diameter, determine that the 3rd is temporarily stifled
The diameter of agent, with continued reference to the example of above-mentioned S207, it is assumed that the above-mentioned a diameter of 9mm of preforation tunnel, the
A diameter of 8mm of one diverting agent, a diameter of 3mm of the second diverting agent, then above-mentioned 3rd diverting agent is straight
Footpath can be less than 1.5m, more than or equal to 1mm, in this example, above-mentioned 3rd diverting agent it is a diameter of
1mm。
It is determined that after the diameter of the 3rd diverting agent, it is possible to according to preforation tunnel diameter, preforation tunnel depth
Quality, the of degree, the quantity of the first diverting agent of the sandstone reservoir of each acidifying grade and the second diverting agent
The real density of the real density of two diverting agents and the 3rd diverting agent, determines the reservoir of each acidifying grade
The quality of the 3rd diverting agent.By taking the reservoir of the first acidifying grade in above-mentioned example as an example, it is assumed that Perforation
The a diameter of Φ of eyePerforation, preforation tunnel depth is h, the quantity of the first diverting agent of the reservoir of the first acidifying grade
It is Q1, the quality of the second diverting agent of the reservoir of the first acidifying grade is M2, the second diverting agent it is true close
It is ρ to spend2, the real density of the 3rd diverting agent is ρ3, the 3rd diverting agent of the reservoir of the first acidifying grade
Mass M3, then the matter of the 3rd diverting agent of the reservoir of the first acidifying grade can be determined according to formula (2)
Amount M3, the formula (2) is specific as follows：
It should be noted that the material of above-mentioned first diverting agent, the second diverting agent and the 3rd diverting agent can be with
It is identical, it is also possible to different, but volume is different with bulk density, specifically can be according to the reservoir being acidified
Physical property determines.
S209, the consumption of preposition acid solution according to the sandstone reservoir of the first acidifying grade, the use of main body acid solution
The consumption of amount and rearmounted acid solution, is that the sandstone reservoir of the first acidifying grade is injected separately into prepad fluid, preposition acid
Liquid, main body acid solution, rearmounted acid solution and displacement fluid, complete the acidifying of the first sandstone reservoir for being acidified grade.
Specifically, with continued reference to above-mentioned example, when it is determined that each is acidified the consumption of the acid solution of the reservoir of grade
After the consumption of diverting agent, it is possible to be each acidifying etc. according to acidifying grade order from high to low
The reservoir of level is implanted sequentially prepad fluid, acid solution and displacement fluid.In this example, the storage of the first acidifying grade
The acidifying grade of layer is high, and the acidifying grade of the reservoir of the second acidifying grade is low, then can first according to the first acid
Change the consumption of the consumption, the consumption of main body acid solution and rearmounted acid solution of the preposition acid solution of the reservoir of grade, be the
The reservoir of one acidifying grade is injected separately into prepad fluid, preposition acid solution, main body acid solution, rearmounted acid solution and replacement
Liquid, to complete the acidifying of the reservoir of the first acidifying grade.Wherein, how to be the reservoir of the first acidifying grade
Injection prepad fluid, preposition acid solution, main body acid solution, rearmounted acid solution and displacement fluid, may refer to prior art.
S210, the sandstone reservoir for the second acidifying grade inject prepad fluid, wherein, it is the second acidifying grade
Sandstone reservoir injection prepad fluid include it is described first acidifying grade sandstone reservoir first temporarily block up
Agent, the second diverting agent of the sandstone reservoir of the first acidifying grade, the of the sandstone reservoir of the first acidifying grade
Three diverting agents.
Specifically, while prepad fluid is injected to the reservoir of the second acidifying grade, according to fixed the
The consumption of the diverting agent of the reservoir of one acidifying grade, i.e., quantity, the second diverting agent according to the first diverting agent
Quality and the 3rd diverting agent quality, for second acidifying grade sandstone reservoir injection prepad fluid in,
It is injected separately into the first diverting agent, the second diverting agent, the 3rd diverting agent.Wherein, the first diverting agent and second
Diverting agent can be injected separately into preset interval time, and the second diverting agent and the 3rd diverting agent can be noted simultaneously
Enter, the default time interval can determine according to the demand of user.
So, the first diverting agent just can be introduced into oil with the reservoir injection prepad fluid for the second acidifying grade
In well, and the direction flowed with prepad fluid is into each liquid absorption is big penetrates in the reservoir of the first acidifying grade
In the eyelet in hole, it is located in reservoir with the preforation tunnel that liquid absorption in the temporarily reservoir of stifled first acidifying grade is big
Port, secondly, then by the second diverting agent and the 3rd diverting agent be injected to the second acidifying grade reservoir note
In the prepad fluid for entering, with the inside of the big preforation tunnel of liquid absorption in the temporarily reservoir of stifled first acidifying grade.
S211, when the pressure of oil well reaches three predetermined threshold values, be the sand reservoir point of the second acidifying grade
Preposition acid solution, main body acid solution, rearmounted acid solution and displacement fluid are not injected, complete the second sandstone for being acidified grade
The acidifying of reservoir.
Specifically, after the big preforation tunnel of liquid absorption is temporarily stifled in the reservoir of the first acidifying grade, when
When knowing that the pressure of oil well reaches three predetermined threshold values by the pressure of well mouth of oil well, that is, the second acidifying
During the pressure value of the reservoir imbibition of grade, then according to second acidifying grade reservoir preposition acid solution consumption,
The consumption of the consumption of main body acid solution and rearmounted acid solution, is that the reservoir of the second acidifying grade is injected separately into preposition acid
Liquid, main body acid solution, rearmounted acid solution and displacement fluid, to complete the acidifying of the reservoir of the second acidifying grade.
Perform after S211, just completed the acidifying of the reservoir, until the temperature of the reservoir after being acidified
After rise, injection first is acidified the first diverting agent in the preforation tunnel of the reservoir of grade, second temporarily stifled
Agent, the degraded of the 3rd diverting agent, and after losing temporarily stifled ability, drive a well open flow, just reached raising oil well with
The connectedness of the reservoir of near wellbore zone, and then improve the purpose of the oily well capacity.
The present invention provide sandstone reservoir acidization tool, by each be acidified grade Reservoir Acidization it
Afterwards, the big preforation tunnel of liquid absorption in the reservoir of each acidifying grade is only carried out into temporarily stifled side with diverting agent
Formula, it is possible to realize the layering homogeneous acidification to reservoir, reduce the preparatory process of Reservoir Acidization, improves
The efficiency of Reservoir Acidization, while oily well capacity is improve, reduces the cost of Reservoir Acidization.
One of ordinary skill in the art will appreciate that：Realize all or part of step of above-mentioned each method embodiment
Suddenly can be completed by the related hardware of programmed instruction.Foregoing program can be stored in a computer can
In reading storage medium.The program upon execution, performs the step of including above-mentioned each method embodiment；And
Foregoing storage medium includes：ROM, RAM, magnetic disc or CD etc. are various can be with store program codes
Medium.
Finally it should be noted that：Various embodiments above is merely illustrative of the technical solution of the present invention, rather than right
Its limitation；Although being described in detail to the present invention with reference to foregoing embodiments, this area it is common
Technical staff should be understood：It can still modify to the technical scheme described in foregoing embodiments,
Or equivalent is carried out to which part or all technical characteristic；And these modifications or replacement, and
The scope of the essence disengaging various embodiments of the present invention technical scheme of appropriate technical solution is not made.
Claims (8)
1. a kind of sandstone reservoir acidization tool, it is characterised in that including：
According to the well-log information of sandstone reservoir, acidifying classification is carried out to the sandstone reservoir；Wherein, per phase
The difference of the horizontal minimum principal stress of the sandstone reservoir of adjacent two acidifyings grade is more than or equal to the first predetermined threshold value；
The thickness of the sandstone reservoir according to each acidifying grade, it is determined that the sandstone storage of each acidifying grade
The consumption of the acid solution of layer；
The perforation quantity and preforation tunnel parameter of the sandstone reservoir according to each acidifying grade, determine institute
State the consumption of the diverting agent of the sandstone reservoir of each acidifying grade；Wherein, the preforation tunnel parameter includes
Preforation tunnel diameter and preforation tunnel depth, the diverting agent are degradable under preset temperature；
According to it is described each acidifying grade sandstone reservoir acid solution consumption, according to acidifying grade from height to
Low order is that the sandstone reservoir of each acidifying grade is implanted sequentially prepad fluid, acid solution and displacement fluid,
And the consumption of the diverting agent according to the sandstone reservoir of each acidifying grade, for it is described each be acidified etc.
It is the sandstone of each acidifying grade during the next stage sandstone reservoir injection prepad fluid of the sandstone reservoir of level
Reservoir injects diverting agent, so that the part of the sandstone reservoir of diverting agent filling each acidifying grade
Preforation tunnel, the partial completion eyelet is preforation tunnel of the liquid absorption more than the second predetermined threshold value.
2. method according to claim 1, it is characterised in that the well logging according to sandstone reservoir
Data, acidifying classification is carried out to the sandstone reservoir, is specifically included：
According to the well-log information of the sandstone reservoir, each horizontal minimum principal stress of the sandstone reservoir is determined,
And static and dynamic correction is carried out to each horizontal minimum principal stress, obtain the horizontal minimum principal stress after each correction；
According to the well-log information of the sandstone reservoir, each perforation layer position of the sandstone reservoir is determined；
According to it is described each correction after horizontal minimum principal stress and the perforation layer position, it is determined that it is described each
The horizontal minimum principal stress after the corresponding correction of sandstone reservoir where perforation layer position；
The horizontal minimum principal stress after the corresponding correction of sandstone reservoir according to where described each perforation layer position
With first predetermined threshold value, acidifying classification is carried out to the sandstone reservoir.
3. method according to claim 1 and 2, it is characterised in that each acid described in the basis
Change the perforation quantity and preforation tunnel parameter of the sandstone reservoir of grade, it is determined that the sand of each acidifying grade
The consumption of the diverting agent of rock reservoir, specifically includes：
According to the preforation tunnel diameter, the diameter of the first diverting agent is determined, and according to described each acidifying
The perforation quantity and default coefficient of the sandstone reservoir of grade, it is determined that the sandstone storage of each acidifying grade
The quantity of the first diverting agent of layer；
According to the preforation tunnel diameter and the diameter of first diverting agent, the straight of the second diverting agent is determined
Footpath, and according to the preforation tunnel diameter, the preforation tunnel depth, it is described each acidifying grade sand
The bulk density of the quantity of the first diverting agent of rock reservoir, second diverting agent, it is determined that described each acid
Change the quality of the second diverting agent of the sandstone reservoir of grade；
According to the straight of the preforation tunnel diameter, the diameter of first diverting agent and second diverting agent
Footpath, determines the diameter of the 3rd diverting agent, and according to the preforation tunnel diameter, the preforation tunnel depth,
The sand of the quantity of the first diverting agent of the sandstone reservoir of each acidifying grade, each acidifying grade
The quality of the second diverting agent of rock reservoir, the real density of second diverting agent, the 3rd diverting agent
Real density, it is determined that it is described each acidifying grade sandstone reservoir the 3rd diverting agent quality.
4. method according to claim 3, it is characterised in that first diverting agent, described
Two diverting agents are identical with the material of the 3rd diverting agent.
5. method according to claim 4, it is characterised in that described according to each acidifying grade
The thickness of sandstone reservoir, it is determined that the consumption of the acid solution of the sandstone reservoir of each acidifying grade, specific bag
Include：
The thickness of the sandstone reservoir according to each acidifying grade, it is determined that described each acidifying grade sandstone
The consumption of the consumption, the consumption of main body acid solution and rearmounted acid solution of the preposition acid solution of reservoir.
6. method according to claim 5, it is characterised in that each acidifying etc. described in the basis
The consumption of the acid solution of the sandstone reservoir of level, is described each acidifying according to acidifying grade order from high to low
The sandstone reservoir of grade is implanted sequentially prepad fluid, acid solution and displacement fluid, specifically includes：
The consumption of the preposition acid solution of the sandstone reservoir according to each acidifying grade, the consumption of main body acid solution
With the consumption of rearmounted acid solution, be followed successively by each acidifying grade sandstone reservoir be injected separately into prepad fluid,
Preposition acid solution, main body acid solution, rearmounted acid solution and displacement fluid.
7. method according to claim 6, it is characterised in that each acidifying etc. described in the basis
The consumption of the diverting agent of the sandstone reservoir of level, in the next stage of the sandstone reservoir for each acidifying grade
It is the sandstone reservoir injection diverting agent of each acidifying grade, specifically during sandstone reservoir injection prepad fluid
Including：
The quantity of the first diverting agent of the sandstone reservoir according to each acidifying grade, the second diverting agent
The quality of quality and the 3rd diverting agent, in the next stage sandstone of the sandstone reservoir for each acidifying grade
During reservoir injection prepad fluid, be each acidifying grade sandstone reservoir be implanted sequentially the first diverting agent,
Second diverting agent, the 3rd diverting agent.
8. method according to claim 7, it is characterised in that the sandstone reservoir is divided into the first acid
Change the sandstone reservoir of grade and the sandstone reservoir of the second acidifying grade；
Then described sandstone reservoir for being followed successively by each acidifying grade be injected separately into prepad fluid, preposition acid solution,
Main body acid solution, rearmounted acid solution and displacement fluid, specifically include：
For described first acidifying grade sandstone reservoir be injected separately into prepad fluid, preposition acid solution, main body acid solution,
Rearmounted acid solution and displacement fluid, complete the acidifying of the sandstone reservoir of the first acidifying grade；
It is the sand of the second acidifying grade after the acidifying of sandstone reservoir of the first acidifying grade is completed
Rock reservoir injects prepad fluid, wherein, in the prepad fluid of the sandstone reservoir injection for being the second acidifying grade
The sandstone of the first diverting agent of the sandstone reservoir including the described first acidifying grade, the first acidifying grade
3rd diverting agent of the second diverting agent of reservoir, the sandstone reservoir of the first acidifying grade；
It is the sand reservoir difference of the second acidifying grade when the pressure of oil well reaches three predetermined threshold values
Preposition acid solution, main body acid solution, rearmounted acid solution and displacement fluid are injected, the sand of the second acidifying grade is completed
The acidifying of rock reservoir.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111472739A (en) * | 2020-04-09 | 2020-07-31 | 中国石油天然气股份有限公司 | Staged fracturing production-increasing transformation method for 3-inch semi-solid well completion shaft of sidetracking horizontal well |
| CN111502586A (en) * | 2019-09-10 | 2020-08-07 | 中国石油天然气股份有限公司 | Reservoir transformation system and reservoir transformation method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060042510A1 (en) * | 2004-08-30 | 2006-03-02 | Kerr-Mcgee Chemical Llc | Surface-treated pigments |
| CN102775980A (en) * | 2012-07-17 | 2012-11-14 | 大庆井升伟业油田技术服务有限公司 | Acidizing block remover suitable for complex lithologic reservoir |
| CN103857877A (en) * | 2011-08-05 | 2014-06-11 | 普拉德研究及开发股份有限公司 | Method of fracturing multiple zones within a well |
| CN104314547A (en) * | 2014-08-18 | 2015-01-28 | 北京运嘉普泰石油天然气技术发展有限公司 | HAFD segmented optimization method and system |
-
2015
- 2015-12-11 CN CN201510921016.0A patent/CN106869880B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060042510A1 (en) * | 2004-08-30 | 2006-03-02 | Kerr-Mcgee Chemical Llc | Surface-treated pigments |
| CN103857877A (en) * | 2011-08-05 | 2014-06-11 | 普拉德研究及开发股份有限公司 | Method of fracturing multiple zones within a well |
| CN102775980A (en) * | 2012-07-17 | 2012-11-14 | 大庆井升伟业油田技术服务有限公司 | Acidizing block remover suitable for complex lithologic reservoir |
| CN104314547A (en) * | 2014-08-18 | 2015-01-28 | 北京运嘉普泰石油天然气技术发展有限公司 | HAFD segmented optimization method and system |
Non-Patent Citations (1)
| Title |
|---|
| 王玉普: "《大型砂岩油田高效开采技》", 31 August 2006, 石油工业出版社 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111502586A (en) * | 2019-09-10 | 2020-08-07 | 中国石油天然气股份有限公司 | Reservoir transformation system and reservoir transformation method |
| CN111502586B (en) * | 2019-09-10 | 2022-02-01 | 中国石油天然气股份有限公司 | Reservoir transformation system and reservoir transformation method |
| CN111472739A (en) * | 2020-04-09 | 2020-07-31 | 中国石油天然气股份有限公司 | Staged fracturing production-increasing transformation method for 3-inch semi-solid well completion shaft of sidetracking horizontal well |
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