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A method for determining the horsepower of fracturing water

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

Active Publication Date: 2019-09-24
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • A method for determining the horsepower of fracturing water
  • A method for determining the horsepower of fracturing water
  • A method for determining the horsepower of fracturing water

Examples

Experimental program
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Embodiment 1

[0032] In order to overcome the difficulties in obtaining the coefficients of the fracturing fluid friction in the prior art using empirical formulas, the calculation results have large deviations from the actual ones, and the technical problems that have a large impact on the determination of water horsepower.

[0033] This embodiment provides a method for determining fracturing water horsepower, which includes the following steps:

[0034] Step 1) Calculate the frictional resistance of 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. The error less than 10% indicates 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 friction resistance of the fracturing fluid in at least three different pipe string inner diameters and determine the friction resistance of the clean water a...

Embodiment 2

[0046] On the basis of Example 1, this example provides a method for determining the fracturing water horsepower. The accuracy of the test results of the indoor friction test device is verified by the following method: the indoor friction test device is used to determine the Measured value of frictional resistance of clean water under different flow rates of column inner diameter Δp w ′, and the theoretical value of friction resistance of clear water 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 which are connected in sequence, a pressure sensor is connected in parallel to the pipe string, and the pressure sensor and the flow meter are both connected to a computer. Such as figure 2 As shown, the outlet of the flow meter is connected with the liquid distribution tank, and the fracturing fluid can be...

Embodiment 3

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

[0052] Step 1) Calculate the friction resistance of the guar gum fracturing fluid with a mass concentration of 0.08%:

[0053] (1) Adopt figure 2 In the indoor friction test device shown, the temperature rises to the temperature that needs to be tested. First, determine the friction resistance of the clean water under three different pipe column inner diameters D and different flow rates Q, and compare with the theoretical formula calculation results, and draw the clean water under rectangular coordinates. The curve of flow rate, measured value of friction and theoretical value of friction to verify whether the result of equipment test is accurate. If the error is less than 10%, the indoor friction test device is reliable; image 3 , Figure 4 The middle is the compa...

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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 oil exploitation fracturing, and in particular relates to a method for determining fracturing water horsepower. Background technique [0002] It has become an important task to determine the frictional resistance of fracturing fluid during the fracturing process. The magnitude of friction will directly affect the determination of fracturing water horsepower and the value of wellhead pressure during fracturing. [0003] At present, the friction reduction ratio method and friction coefficient method are mainly used at home and abroad to calculate fracturing fluid friction. When using the empirical formula to calculate the resistance reduction ratio, it is necessary to determine the coefficient of each parameter in the empirical formula. The coefficient is related to the nature of the liquid and is difficult to obtain accurately. The previous experience value does not conform to the reality. Greatly affect subseq...

Claims

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Application Information

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Patent Type & Authority Patents(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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