Determining method for fracturing water horsepower

A method of determining water horsepower, which is applied to earthwork drilling, wellbore/well components, complex mathematical operations, etc., can solve the problem of large deviation between calculation results and actual conditions, large influence of water horsepower determination, and difficulty in obtaining coefficients of empirical formulas, etc. problem, to achieve accurate friction calculation, accurate fracturing water horsepower, simple and accurate calculation

Active Publication Date: 2018-04-20
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the technical problems that the friction resistance of the fracturing fluid in the prior art is difficult to obtain by using the empirical formula coefficient, the calculation result has a large deviation from the actual situation, and has a great influence on the determination of the water horsepower

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  • Determining method for fracturing water horsepower
  • Determining method for fracturing water horsepower
  • Determining method for fracturing water horsepower

Examples

Experimental program
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Effect test

Embodiment 1

[0032] In order to overcome the technical problem that it is difficult to obtain the empirical formula coefficient for the fracturing fluid friction in the prior art, the calculated result deviates greatly from the actual, and has a great influence on the determination of the water horsepower.

[0033] This embodiment provides a method for determining hydraulic power for fracturing, including the following steps:

[0034] Step 1) calculate the frictional resistance of the fracturing fluid, the process is as follows (see figure 1 ):

[0035] (1) Verify the accuracy of the test results of the indoor friction test device, if the error is less than 10%, it means that the indoor friction test device is reliable;

[0036] (2) Configure the fracturing fluid to be measured, and use the indoor friction test device to measure the fracturing fluid friction and clean water friction in at least three different pipe string inner diameters at the required test temperature to obtain the frac...

Embodiment 2

[0046] On the basis of Example 1, this embodiment provides a method for determining the horse power of fracturing water, and the accuracy of the test results of the indoor friction test device is verified by the following method: use the indoor friction test device to measure The measured value of clean water friction resistance Δp at different flow rates of the inner diameter of the column w ′, and the theoretical value of clear water friction Δp w For comparison, if the error is less than 10%, the indoor friction test device is reliable.

[0047] Wherein, the indoor friction test device includes a liquid distribution tank, a plunger pump, a pipe string and a flow meter connected in sequence, the pipe string is connected in parallel with a pressure sensor, and the pressure sensor and flow meter are connected to a computer. like figure 2As shown, the outlet of the flowmeter is connected with the liquid distribution tank, and the fracturing fluid can be recycled. A pressure...

Embodiment 3

[0051] On the basis of the foregoing examples, the present invention is used to determine the fracturing water horsepower when fracturing with guar gum fracturing fluid with a mass concentration of 0.08%.

[0052] Step 1) calculating mass concentration is the frictional resistance of the guar gum fracturing fluid of 0.08%:

[0053] (1) use figure 2 In the indoor friction test device shown, the temperature rises to the temperature to be tested. First, measure the friction resistance of clean water under three different pipe string inner diameters D and different flow rates Q, and compare with the theoretical formula calculation results, and draw the clean water in the Cartesian coordinates. Curves of the measured value of flow and friction resistance and the theoretical value of friction resistance to verify whether the test results of the equipment are accurate. If the error is less than 10%, the indoor friction resistance test device is reliable; image 3 , Figure 4 The m...

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Abstract

The invention provides a determining method for fracturing water horsepower. By improving the calculation precision of the frictional resistance of a fracturing fluid, frictional resistance calculation is accurate, and obtained construction pressure is accurate, so that the fracturing water horsepower is more accurate, material consumption is reduced, and the cost is saved. By using the method ofcombining the experiment with the theory, through the frictional resistance experiment of indoor small pipe column inner diameter and a guanidine gum liquid, the relationship between flow rate and antifriction ratio is obtained by using a fitting method, and then by using the obtained relationship, the frictional resistance of different pipe column inner diameters and the guanidine gum fracturingliquid under the flow rate is calculated. By means of the method, the problem that the coefficient of empirical formula is difficult to calculate is avoided, calculating of the antifriction ratio is simpler and more accurate, and the calculated frictional resistance of the guanidine gum fracturing liquid is closer to the actual frictional resistance.

Description

technical field [0001] The invention belongs to the technical field of fracturing in oil exploitation, and in particular relates to a method for determining the horse power of fracturing water. Background technique [0002] It is an important work to determine the friction of fracturing fluid during the fracturing process. The frictional resistance will directly affect the determination of the fracturing water horsepower and the value of the wellhead pressure during the fracturing process. [0003] At present, the drag reduction ratio method and the friction coefficient method are mainly used to calculate the friction of fracturing fluid at home and abroad. When using the empirical formula to calculate the drag reduction ratio, it is necessary to determine the coefficient of each parameter in the empirical formula, and the coefficient is related to the property of the liquid, so it is difficult to obtain it accurately. large, affecting subsequent data analysis. Measuring ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/26G06F17/18
CPCE21B43/26G06F17/18
Inventor 袁海平张纯民陶长州王志城陈飞姬随波马小龙郭艳萍
Owner BC P INC CHINA NAT PETROLEUM CORP
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