CN108398538A - A kind of evaluation method of compact reservoir slippery water fracturing fluid prop-carrying capacity - Google Patents
A kind of evaluation method of compact reservoir slippery water fracturing fluid prop-carrying capacity Download PDFInfo
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- CN108398538A CN108398538A CN201711417653.XA CN201711417653A CN108398538A CN 108398538 A CN108398538 A CN 108398538A CN 201711417653 A CN201711417653 A CN 201711417653A CN 108398538 A CN108398538 A CN 108398538A
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Abstract
The present invention provides a kind of evaluation methods of compact reservoir slippery water fracturing fluid prop-carrying capacity, it is changed over time on the section of outstanding sand rotor by slippery water fracturing fluid and generates different torsion, the slippery water fracturing fluid that obtained outstanding sand flow varied curve can react under different shear rate takes sand situation, to evaluate the prop-carrying capacity of slippery water fracturing fluid, the described evaluation method is equally applicable to the evaluation of crosslinking natural plant gum and non-crosslinked association type fracturing fluid prop-carrying capacity.The present invention uses common fracturing fluid evaluation appts, improve rheometer rotor, the test method of evaluation slippery water fracturing fluid prop-carrying capacity is obtained, solve the problems, such as that conventional rheometer cannot take sand and can not evaluate slippery water prop-carrying capacity, rotor speed can simulate underground shearing, outstanding sand rotor simulation dynamic hangs sand so that prop-carrying capacity test result is more nearly underground actual conditions.The invention test method is simple and easy to do, can complete to evaluate slippery water prop-carrying capacity in Routine Test Lab.
Description
Technical field
The present invention relates to field of petroleum exploitation, and in particular to a kind of evaluation of compact reservoir slippery water fracturing fluid prop-carrying capacity
Method.
Background technology
For the technology requirement of compact reservoir transformation, slippery water become fine and close oil gas transformation theme fracturing fluid technology it
One.Along with the exploitation of compact reservoir, slippery water fracturing fluid is more widely applied.
By viscosity take sand theory based on shearing rheological property evaluation be current solid-carrying performance most classical evaluation method.
Current fracturing fluid property evaluation method primarily rests on the shearing evaluation method based on viscosity.This method can be preferable
React the shearing rheological property of natural plant gum class fracturing fluid.The lower frictional resistance of slippery water fracturing fluid and more excellent application performance branch
The change of Fracturing Technology is supportted.
Differences in viscosity will be used in the fracturing fluid of 100 times of two kinds of different conditions in a pressure break, viscosity evaluation method
Applicability encounters challenge.Evaluation method based on viscosity cannot be satisfied the technological progress demand of fracturing fluid system.
China University Of Petroleum Beijing（East China）Wen Qingzhi etc. is delivered《Slippery water solid-carrying performance dynamic experiment》, provide a kind of cunning
Water solid-carrying performance evaluation method is slipped, intuitively observing proppant using large-scale visual tablet results of fracture simulation system lays situation, makes branch
It supports dynamic settling, whaleback form of the agent in crack to visualize, but can not quantitatively evaluating slippery water prop-carrying capacity quality.Xi'an stone
Oily university Hu Feifei is delivered《Extend terrestrial facies shale gas reservoir slippery water fracturing fluid and its prop-carrying capacity research》, provide and pass through
It observes the rule that whaleback height and length change over time in each stage and carries out Simulation evaluation slippery water fracturing fluid prop-carrying capacity,
Proppant is observed again by tablet crack, experiment labor intensity is big, and efficiency is low, cannot directly quantify.
Although external viscoplasticity test can evaluate the elasticity of fluid with it is sticky under reservoir temperature which be dominant, itself and pressure
It splits liquid and takes the relationship of sand in seam and there is no quantitative result of study both at home and abroad.It is external more to apply viscoplasticity testing and debugging fracturing fluid
Optimal solid-carrying performance, rather than it is used for the prop-carrying capacity difference of more various types of fracturing fluid, while prop-carrying capacity
There is still a need for compared with settling test for difference.
Invention content
The purpose of the present invention is overcoming the problems of above-mentioned prior art, a kind of compact reservoir slippery water pressure break is provided
The evaluation method of liquid prop-carrying capacity.
The technical solution of the present invention is to provide a kind of evaluation method of compact reservoir slippery water fracturing fluid prop-carrying capacity, packets
Include following steps：
Proppant is added in slippery water fracturing fluid in step 1, stirs evenly so that proppant is suspended in slippery water fracturing fluid completely
In；
The prepared slippery water fracturing fluid of step 1 is packed into rheometer by step 2, record rheometer rotor stress τ t at any time
Situation of change；
Step 3, using time t as abscissa, rotor stress τ be ordinate make curve, the as outstanding sand flow of slippery water fracturing fluid
Varied curve；
Step 4, the prop-carrying capacity that slippery water fracturing fluid is evaluated according to outstanding sand flow varied curve.
Preferably, the mass percent that slippery water fracturing fluid is added in proppant in the step 1 is 5 ~ 15%.
Preferably, the rotor of the rheometer in the step 2 is outstanding sand rotor.
It is furthermore preferred that the outstanding sand rotor is screw-type rotors 1 or paddle type rotor 2.
The blade of the screw-type rotors 1 is spiral shape.
The blade of the paddle type rotor 2 has been uniformly distributed circumferentially 4.
The evaluation of the prop-carrying capacity of slippery water fracturing fluid is as follows in the step 4：As outstanding sand flow varied curve upper rotor part stress τ
When starting to increase, show that the proppant in slippery water fracturing fluid starts to settle, when rotor stress τ reaches maximum value, rotor stress τ
When constant, show that proppant sedimentation is complete.
The described evaluation method changed over time on the section of outstanding sand rotor by slippery water fracturing fluid generate it is different
Torsion, the slippery water fracturing fluid that obtained outstanding sand flow varied curve can react under different shear rate takes sand situation, to evaluate
The prop-carrying capacity of slippery water fracturing fluid.
The described evaluation method is equally applicable to the evaluation of crosslinking natural plant gum and non-crosslinked association type fracturing fluid prop-carrying capacity.
The rheometer is flow velocity rotary meter, Fan50 viscosimeters or Haake RS6000 rotational viscometers.
Beneficial effects of the present invention：
The evaluation method of this compact reservoir slippery water fracturing fluid prop-carrying capacity of the present invention is by slippery water fracturing fluid in outstanding sand
It is changed over time on the section of rotor and generates different torsion, obtained outstanding sand flow varied curve can react under different shear rate
Slippery water fracturing fluid take sand situation, to evaluate the prop-carrying capacity of slippery water fracturing fluid, the described evaluation method is equally applicable
In the evaluation of crosslinking natural plant gum and non-crosslinked association type fracturing fluid prop-carrying capacity.The present invention evaluates instrument with common fracturing fluid
Device improves rheometer rotor, has obtained the test method of evaluation slippery water fracturing fluid prop-carrying capacity, has solved conventional rheometer
The problem of sand cannot be taken and can not evaluate slippery water prop-carrying capacity, rotor speed can simulate underground shearing, hang sand rotor simulation
Dynamic hangs sand so that prop-carrying capacity test result is more nearly underground actual conditions.The invention test method is simple and easy to do, normal
Rule laboratory can complete to evaluate slippery water prop-carrying capacity.
The present invention is described in further details below with reference to attached drawing.
Description of the drawings
Fig. 1 is the structural schematic diagram of screw-type rotors in the present invention；
Fig. 2 is the structural schematic diagram of paddle type rotor in the present invention；
Fig. 3 is the outstanding sand flow varied curve of guanidine glue slippery water fracturing fluid in embodiment 2；
Fig. 4 is the outstanding sand flow varied curve of polymer slippery water fracturing fluid in embodiment 3.
Reference sign：1, screw-type rotors；2, paddle type rotor.
The present invention is described in further details below with reference to specific embodiment.
Specific implementation mode
Embodiment 1：
In order to overcome existing technical problem, a kind of commenting for compact reservoir slippery water fracturing fluid prop-carrying capacity is present embodiments provided
Valence method, the technical solution of the present invention is to provide a kind of evaluation method of compact reservoir slippery water fracturing fluid prop-carrying capacity, packets
Include following steps：
Proppant is added in slippery water fracturing fluid in step 1, stirs evenly so that proppant is suspended in slippery water fracturing fluid completely
In；
The slippery water fracturing fluid is that compact reservoir transformation polymerize species slippery water fracturing fluid, including EM30 slippery water, EM30S
Slippery water etc., but it is not limited only to this, slippery water fracturing fluid is product commonly used in the art, directly commercially available on the market.
Preferably, the mass percent that slippery water fracturing fluid is added in the proppant is 5 ~ 15%.
The prepared slippery water fracturing fluid of step 1 is packed into rheometer by step 2, and record rheometer rotor stress τ is at any time
The situation of change of t；
The rheometer is instrument commonly used in the art can select flow velocity rotary meter, Fan50 viscous for common knowledge
Degree meter or Haake RS6000 rotational viscometers, but it is not limited only to these three.
Preferably, the rotor of the rheometer is outstanding sand rotor.
It is furthermore preferred that the outstanding sand rotor is screw-type rotors 1 or paddle type rotor 2.
The blade of the screw-type rotors 1 is spiral shape.
The blade of the paddle type rotor 2 has been uniformly distributed circumferentially 4.
Step 3, using time t as abscissa, rotor stress τ is that ordinate makes curve, and as slippery water fracturing fluid is outstanding
Sand flow varied curve；
Step 4, the prop-carrying capacity that slippery water fracturing fluid is evaluated according to outstanding sand flow varied curve.
The evaluation of the prop-carrying capacity of the slippery water fracturing fluid is as follows：When outstanding sand flow varied curve upper rotor part stress τ starts to increase
Added-time shows that the proppant in slippery water fracturing fluid starts to settle, and when rotor stress τ reaches maximum value, rotor stress τ is constant
When, show that proppant sedimentation is complete.
The described evaluation method changed over time on the section of outstanding sand rotor by slippery water fracturing fluid generate it is different
Torsion, the slippery water fracturing fluid that obtained outstanding sand flow varied curve can react under different shear rate takes sand situation, to evaluate
The prop-carrying capacity of slippery water fracturing fluid.
The described evaluation method is equally applicable to the evaluation of crosslinking natural plant gum and non-crosslinked association type fracturing fluid prop-carrying capacity.
The evaluation method of this compact reservoir slippery water fracturing fluid prop-carrying capacity provided by the invention uses common pressure break
Liquid evaluation appts improve rheometer rotor, have obtained the test method of evaluation slippery water fracturing fluid prop-carrying capacity, solve often
The problem of rule rheometer cannot take sand and can not evaluate slippery water prop-carrying capacity, rotor speed can simulate underground shearing, hang sand
Rotor simulation dynamic hangs sand so that prop-carrying capacity test result is more nearly underground actual conditions.The invention test method is easy
It is easy, it can complete to evaluate slippery water prop-carrying capacity in Routine Test Lab.
Embodiment 2：
Present embodiments provide a kind of evaluation method of indoor carry out guanidine glue slippery water fracturing fluid prop-carrying capacity, test temperature：60
DEG C, steps are as follows：
Step 1, configuration guanidine glue slippery water fracturing fluid：+ 0.5% neopelex of+0.5% potassium chloride of 0.08% guanidine glue+
98.02% water, is added proppant in guanidine glue slippery water fracturing fluid, and proppant accounts for the mass percent of guanidine glue slippery water fracturing fluid
It is 10%, stirs evenly so that proppant is suspended in completely in slippery water fracturing fluid；
Step 2, by step 1）Prepared guanidine glue slippery water fracturing fluid is packed into Haake RS6000 rheometers, the rotor choosing of rheometer
With screw-type rotors 1 as shown in Figure 1, record rheometer rotor stress τ1T at any time1Situation of change；
Step 3, with time t1For abscissa, rotor stress τ1Curve, the as outstanding sand of slippery water fracturing fluid are made for ordinate
Rheological curve, as shown in Figure 3；
Step 4, the prop-carrying capacity that slippery water fracturing fluid is evaluated according to outstanding sand flow varied curve：
From the figure 3, it may be seen that when the time reaching 400s, proppant starts to sink, with the progress of time, rotor stress τ1Gradually increase
Greatly, proppant gradually settles, when the time reaching 660s, rotor stress τ1It varies less, illustrates that proppant is settled down to bottom substantially
Portion, rotor stress τ1When reaching maximum value, illustrate that proppant settles completely..
Embodiment 3：
Present embodiments provide a kind of evaluation method of indoor carry out polymer slippery water fracturing fluid prop-carrying capacity, test temperature：
30 DEG C, steps are as follows：
Step 1, configuration polymer slippery water fracturing fluid：+ 0.5% cetyl front three of+0.5% potassium chloride of 0.25% polyacrylamide
Base ammonium bromide, remaining is water, and proppant is added in polymer slippery water fracturing fluid, and proppant accounts for polymer slippery water fracturing fluid
Mass percent be 15%, stir evenly so that proppant is suspended in completely in slippery water fracturing fluid；
Step 2, by step 1）Prepared polymer slippery water fracturing fluid is packed into flow velocity rotary meter, flow velocity rotary meter
Rotor select paddle type rotor 2 as shown in Figure 2, record rheometer rotor stress τ2T at any time2Situation of change；
Step 3, with time t2For abscissa, rotor stress τ2Curve, the as outstanding sand of slippery water fracturing fluid are made for ordinate
Rheological curve, as shown in Figure 4；
Step 4, the prop-carrying capacity that slippery water fracturing fluid is evaluated according to outstanding sand flow varied curve：
As shown in Figure 4, when the time reaching 90s, proppant starts to sink, with the progress of time, rotor stress τ2Gradually increase
Greatly, proppant gradually settles, when the time reaching 250s, rotor stress τ2It varies less, illustrates that proppant is settled down to bottom substantially
Portion, rotor stress τ2When reaching maximum value, illustrate that proppant settles completely.
The foregoing examples are only illustrative of the present invention, does not constitute the limitation to protection scope of the present invention, all
Be with the present invention it is same or analogous design all belong to the scope of protection of the present invention within.
Claims (10)
1. a kind of evaluation method of compact reservoir slippery water fracturing fluid prop-carrying capacity, it is characterised in that：Include the following steps：
Proppant is added in slippery water fracturing fluid in step 1, stirs evenly so that proppant is suspended in slippery water fracturing fluid completely
In；
The prepared slippery water fracturing fluid of step 1 is packed into rheometer by step 2, record rheometer rotor stress τ t at any time
Situation of change；
Step 3, using time t as abscissa, rotor stress τ be ordinate make curve, the as outstanding sand flow of slippery water fracturing fluid
Varied curve；
Step 4, the prop-carrying capacity that slippery water fracturing fluid is evaluated according to outstanding sand flow varied curve.
2. the evaluation method of compact reservoir slippery water fracturing fluid prop-carrying capacity as described in claim 1, it is characterised in that：It is described
The mass percent that slippery water fracturing fluid is added in proppant in step 1 is 5 ~ 15%.
3. the evaluation method of compact reservoir slippery water fracturing fluid prop-carrying capacity as described in claim 1, it is characterised in that：It is described
The rotor of rheometer in step 2 is outstanding sand rotor.
4. the evaluation method of compact reservoir slippery water fracturing fluid prop-carrying capacity as claimed in claim 3, it is characterised in that：It is described
Outstanding sand rotor is screw-type rotors（1）Or paddle type rotor（2）.
5. the evaluation method of compact reservoir slippery water fracturing fluid prop-carrying capacity as claimed in claim 4, it is characterised in that：It is described
Screw-type rotors（1）Blade be spiral shape.
6. the evaluation method of compact reservoir slippery water fracturing fluid prop-carrying capacity as claimed in claim 4, it is characterised in that：It is described
Paddle type rotor（2）Blade be uniformly distributed circumferentially 4.
7. the evaluation method of compact reservoir slippery water fracturing fluid prop-carrying capacity as described in claim 1, it is characterised in that：It is described
The evaluation of the prop-carrying capacity of slippery water fracturing fluid is as follows in step 4：When outstanding sand flow varied curve upper rotor part stress τ starts to increase,
Show that the proppant in slippery water fracturing fluid starts to settle, when rotor stress τ reaches maximum value, and rotor stress τ is constant, shows
Proppant sedimentation is complete.
8. the evaluation method of compact reservoir slippery water fracturing fluid prop-carrying capacity as described in claim 1, it is characterised in that：It is described
The evaluation method is changed over time on the section of outstanding sand rotor by slippery water fracturing fluid and generates different torsion, and what is obtained is outstanding
Sand flow varied curve can react the slippery water fracturing fluid under different shear rate and take sand situation, to evaluate slippery water fracturing fluid
Prop-carrying capacity.
9. the evaluation method of compact reservoir slippery water fracturing fluid prop-carrying capacity as described in claim 1, it is characterised in that：It is described
The evaluation method is equally applicable to the evaluation of crosslinking natural plant gum and non-crosslinked association type fracturing fluid prop-carrying capacity.
10. the evaluation method of compact reservoir slippery water fracturing fluid prop-carrying capacity as described in claim 1, it is characterised in that：Institute
It is flow velocity rotary meter, Fan50 viscosimeters or Haake RS6000 rotational viscometers to state rheometer.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111999224A (en) * | 2020-08-28 | 2020-11-27 | 陕西延长石油（集团）有限责任公司 | Fracturing fluid dynamic sand suspension performance testing device and method |
| CN112459761A (en) * | 2020-11-28 | 2021-03-09 | 濮阳华成恒业石油技术开发有限公司 | Temporary plugging acid fracturing method |
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| CN111999224A (en) * | 2020-08-28 | 2020-11-27 | 陕西延长石油（集团）有限责任公司 | Fracturing fluid dynamic sand suspension performance testing device and method |
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| CN112459761A (en) * | 2020-11-28 | 2021-03-09 | 濮阳华成恒业石油技术开发有限公司 | Temporary plugging acid fracturing method |
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