Experimental process and equipment of repeated perforation of same hole

A process and experimental technology, applied in the fields of fluid production, measurement, wellbore/well components, etc., can solve the problems of inability to realize, inability to perform repeated perforation experiments in the same hole, and inability to perform repeated perforation experiments in the same hole, etc. handy effect

Inactive Publication Date: 2018-04-13
PETROCHINA CO LTD +1
6 Cites 2 Cited by

AI-Extracted Technical Summary

Problems solved by technology

[0002] The testing technology of perforating equipment currently used in oilfields is based on GB/T 20488-2006 "Performance Test Method for Energy Concentrating Perforating Equipment for Oil and Gas Wells", API RP19B: 2006 Second Edition "Recommended Practices for Evaluation of Perforating Equipment for Oil and Gas Wells" (English version ), etc., are all one-time perforation test technology, and the corresponding experimental equipment cannot carry out repeated ...
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Abstract

The invention relates to the field of oil field well logging, and belongs to an experimental process and equipment of repeated perforation of the same hole of oil field well logging perforation equipment. To solve the problem that perforation equipment in oil field well logging cannot realize repeated perforation on the basis of the first perforation evelet, the experimental process and equipmentare designed. The experimental equipment is mainly composed of a well pressure simulation and perforation system (1), a confining pressure simulation system (2), a pore pressure simulation system (3).The pressure simulation system (2) and the pore pressure simulation system (3) provide confining pressure, pore pressure, and a target. The well pressure simulation and perforation system (1) provides perforation under the well pressure condition. Repeated perforation is achieved through replacing an energy-gathered perforation device (6) inside the well pressure simulation and perforation system(1). The experimental process has the advantages can simulate down hole confining pressure conditions to complete repeated perforation of the same hole and flowing test; low in cost, high in efficiency, and convenient to use.

Application Domain

SurveyConstructions +1

Technology Topic

Oil fieldEnvironmental geology +3

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  • Experimental process and equipment of repeated perforation of same hole

Examples

  • Experimental program(1)

Example Embodiment

[0017] Specific embodiments: The present invention will be described in further detail below with reference to the accompanying drawings. The present invention is achieved through the following technical solutions: the same hole repeated perforation experiment process and device, which is implemented by the following device: it is simulated by well pressure And perforation system 1, confining pressure simulation system 2, pore pressure simulation system 3;
[0018] The well pressure simulation and perforation system 1 consists of a well pressure simulator 4, a locator 5, an energy-concentrating perforator 6, a detonation line 7, a well pressure measuring device 8, a well pressure booster 9, and a well pressure accumulator 10. The overflow controller 11 and the return pipeline 12 are composed; the positioner 5 is threadedly connected to the connecting end surface 13, the shaped energy perforator 6 is placed in the positioner 5, and the detonation line 7 in the shaped energy perforator 6 passes through the well pressure The simulator 4, the well pressure simulator 4 is threadedly connected with the well pressure measuring device 8, the well pressure pressure pipe 9, the well pressure accumulator 10, the overflow controller 11, and the return pipeline 12 through the pipeline;
[0019] The confining pressure simulation system 2 consists of the connecting end surface 13, the casing simulation piece 14, the cement ring simulation piece 15, the sandstone target 16, the rubber sleeve 17, the liquid flow distributor 18, the pressure control pipeline 25, the pressure control system 26, and the confining pressure simulator. 27 composition; wherein the rubber sleeve 17 is installed in the confining pressure simulator 27, the rubber sleeve 17 is sequentially loaded with a cement ring simulation piece 15, a sandstone target 16, and the casing simulation piece 14 is screwed on the connecting end surface 13, and the connecting end surface 13 is extruded Tighten the end surface of the rubber sleeve 17, the end surface of the sleeve simulation piece 14 is inserted into the rubber sleeve 17 and is in contact with the cement ring simulation piece 15, the liquid flow distributor 18 squeezes the end surface of the rubber sleeve 17, the rubber sleeve 17 is in contact with the sandstone target 16 and is connected to control The pressure pipeline 25 is threadedly connected with the pressure control system 26 and the confining pressure simulator 27 respectively;
[0020] The pore pressure simulation system 3 is composed of a pore pressure pressurizing tube 19, a pore pressure measuring device 20, a temperature measuring device 21, a pore flow measuring device 22, a pore pressure accumulator 23, and a pressure control system 24; the pore pressure is pressurized One end of the pipe 19 is connected to the liquid flow distributor 18 through a screw thread, and the other end of the pore pressure pressurizing pipe 19 is connected to the pore pressure measuring device 20, the temperature measuring device 21, the pore flow measuring device 22, the pore pressure accumulator 23, and the pressure control in sequence. Pressure system 24 threaded connection;
[0021] The well pressure simulation and perforation system 1 and the confining pressure simulation system 2 are connected through the connecting end face 13 threadedly, and the pore pressure simulation system 3 and the confining pressure simulation system 2 are threadedly connected by the pore pressure pressurizing pipe 19; the process is realized by the following steps of:
[0022] a. Perform perforation and flow tests first; connect the device, pressurize the well pressure simulator 4 by the well pressure booster tube 9, monitor the pressure by the well pressure measurement device 8, and release the pressure by the overflow controller 11 to control the setting Pressure value; the pressure control system 26 and the pressure control pipeline 25 apply confining pressure to the sandstone target 16 in the rubber sleeve 17 and keep the pressure stable; the pressure control system 24 and the pore pressure pressure pipe 19 add confining pressure to the sandstone target 16 Pore ​​pressure and keep the pressure stable and continue to supply liquid. When the design pressure value is reached, the accumulating perforator 6 is detonated through the detonation line 7, and the pressure is kept stable by the well pressure accumulator 10 and the pore pressure accumulator 23. The pressure control system 24 continuously supplies liquid to the sandstone target 16. When the pressure is greater than the set pressure value, the pressure is relieved by the overflow controller 11 and the return line 12, and passes through the pore pressure measuring device 20, the temperature measuring device 21, and the pore flow measuring device 22. The well pressure measuring device 8 measures the pressure difference between the two ends of the sandstone target 16, the flow rate and temperature of the fluid passing through the perforation channel;
[0023] b. Secondly, measure the perforation depth and perforation diameter after perforation; after completing the flow test, adjust the pressure control system 26 to adjust the confining pressure to the set pressure value and keep it stable, and use the well pressure booster 9 to control the well pressure simulator The pressure drop in 4 is 0, the pressure in the sandstone target 16 is dropped to 0 through the pressure control system 24 and the pore pressure pressure pipe 19, and the return line 12, the overflow controller 11, and the well pressure storage are sequentially removed. Device 10, well pressure pressure pipe 9, well pressure measuring device 8, well pressure simulator 4, detonation line 7, remove the positioner 5, take out the energy-concentrating perforator 6, and measure the perforation depth and perforation diameter of the sandstone target 16 ;
[0024] c. Finally, repeat the perforation and flow test in the same hole; replace the new energy-concentrated perforator 6, install the well pressure simulation and perforation system 1 on the confining pressure simulation system 2, and repeat step a for the same hole perforation and Test, repeat step b to measure the perforation depth and perforation diameter of the sandstone target 16 after repeated perforation. Every time the same hole perforation is performed, a new energy-concentrating perforator 6 needs to be replaced, and steps a and b are repeated until the same time is completed. In the perforation experiment, the pressure difference between the two ends of the sandstone target 16, the flow rate of the fluid passing through the perforation channel, the temperature, the perforation depth, and the perforation diameter are measured.

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