Fracturing pulse sand filling system with ultrahigh flow conductivity and method for operating fracturing pulse sand filling system

A technology of diversion capacity and pulse, which is applied in the field of oil and gas field development and research, can solve the problems of increasing equipment and machine maintenance, repair costs, inability to realize proppant slug injection, pressure suppression of sand mixing vehicles, etc., and achieve reliable measurement and control systems , avoid damage and hysteresis effect, improve the effect of relative life

Active Publication Date: 2013-09-25
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, when the proppant is injected into the sand mixing truck, the continuous injection is basically selected, and the slug injection of the proppant cannot be realized. To realize this function, the machine needs to be switched on and off intermittently, which will be caused by repeated startup of the machi

Method used

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  • Fracturing pulse sand filling system with ultrahigh flow conductivity and method for operating fracturing pulse sand filling system

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0037] Embodiment 1,

[0038] A fracturing pulse sanding system for achieving ultra-high conductivity, comprising an external control unit 20, an internal controlled unit 19, an external fracturing pump unit 18, a sand mixing vehicle 7 and a liquid storage tank 9; the sand mixing The vehicle 7 is filled with sand mixing fluid for fracturing, the liquid storage tank 9 is filled with base fluid for fracturing, and the external control unit 20 realizes the sand mixing in the sand mixing vehicle 7 through the internal controlled unit 19 The liquid and base fluid in the liquid storage tank 9 are alternately pumped into the external fracturing pump unit 18, and finally the external fracturing pump unit 18 realizes the alternate pumping of sand mixing fluid and base fluid to the middle of underground mining fractures.

[0039] The sand ratio in the sand mixing liquid is 50%.

[0040] The external control unit 20 includes a control panel 1, a display 2 installed on the control panel,...

Example Embodiment

[0045] Embodiment 2,

[0046] A fracturing pulse sanding system that achieves ultra-high conductivity as described in Embodiment 1, the difference is that the No. 1 three-way electric ball valve 14 and the No. 2 three-way electric ball valve 17 are in the open or closed state Completely opposite: when the No. 1 three-way electric ball valve 14 is opened, the No. 2 three-way electric ball valve 17 is closed; when the No. 1 three-way electric ball valve 14 is closed, the No. 2 three-way electric ball valve 17 is opened. The selection parameters of the three-way electric ball valve are as follows: with AC220V as the power, the nominal diameter of the three-way electric ball valve: 101.6mm, the nominal pressure: 4MPa, the medium temperature: 20-40°C, the sealing method of the valve body is hard seal, Among them, the material of the valve body is WCB, the material of the ball is 2Cr13 (nitrided), the material of the seat sealing ring is reinforced polyvinyl chloride (PPL), the appl...

Example Embodiment

[0047] Embodiment 3,

[0048] A working method of the fracturing pulse sand adding system as described in embodiment 1, comprising the following steps:

[0049] (1) Press the start button 13 to start the fracturing pulse sand addition system;

[0050] (2) At the initial stage of fracturing, set the upper limit values ​​of the No. 1 and No. 2 electromagnetic flow meters respectively through the control button 3 of the No. 1 electromagnetic flow meter and the control button 4 of the No. 2 electromagnetic flow meter, and select the automatic mode Work, when the flow exceeds the upper limit, the system sends out an alarm, and feeds back to the PLC controller 11 according to the flow data, and the PLC controller 11 sends instructions to the No. 1 electric three-way ball valve 14 and the No. 2 electric three-way ball valve 17, and the valve Turn it down to an appropriate value. If the system has not cleared the alarm, the system will automatically switch to manual mode, and the con...

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Abstract

The invention relates to a fracturing pulse sand filling system with ultrahigh flow conductivity. The fracturing pulse sand filling system comprises an external control unit, an internal controlled unit, an external fracturing pump truck unit, a sand mixing truck and a fluid storage tank. Fracturing sand-mixed fluid is accommodated in the sand mixing truck, fracturing base fluid is accommodated in the fluid storage tank, the external control unit controls the internal controlled unit, so that the sand-mixed fluid in the sand mixing truck and the base fluid in the fluid storage are alternately pumped into the external fracturing pump truck unit at intervals, and the sand-mixed fluid and the base fluid are finally alternately pumped into underground exploitation cracks at intervals by the external fracturing pump truck unit. The fracturing pulse sand filling system has the advantages that propping agent slugs added with fibers can be injected in a pulse manner under the control of the system, the flow conductivity of the prop cracks is greatly improved, a lag effect due to continuous opening and closing of an existing sand mixing truck is prevented, damage to the sand mixing truck is reduced, and pressure building during propping agent injection can be effectively prevented by the system.

Description

technical field [0001] The invention relates to a fracturing pulse sanding system and a working method thereof for realizing ultra-high conductivity, and belongs to the technical field of oil and gas field development and research. Background technique [0002] In the process of conventional hydraulic fracturing, the construction process is basically to inject the proppant into the formation continuously with the pre-set sand ratio after the pre-fluid is injected, and to fill the fracturing fractures. Compared with the original oil and gas reservoirs, its conductivity is indeed much improved. However, due to the damage of fracturing fluid to fracture conductivity, the fragmentation of proppant, the clogging of pores by debris falling off the fracture wall after pressure, and the embedding of proppant, etc., the conductivity of fracturing fractures will be greatly reduced. , the actual conductivity after fracturing is far lower than the experimental value, so the production ...

Claims

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Application Information

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IPC IPC(8): E21B43/267
Inventor 温庆志刘锋罗明良金晓春李杨徐希刘荣于学亮
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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