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Stratum simulation device and crack plugging instrument

A technology for simulating devices and formations, applied in the field of drilling fluid plugging test, which can solve problems such as difficult operation, inability to comprehensively evaluate plugging formula, formation loss channels, etc.

Active Publication Date: 2021-11-09
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a formation simulation device and a crack plugging instrument, which can solve the problem that the formation simulation device of the existing plugging evaluation device is difficult to truly simulate the formation leakage channel, and at the same time solve the problem that the existing plugging evaluation device has a complex experimental process and difficult operation. Difficulty, unable to comprehensively evaluate the technical problems of various parameters of the plugging formula

Method used

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  • Stratum simulation device and crack plugging instrument
  • Stratum simulation device and crack plugging instrument
  • Stratum simulation device and crack plugging instrument

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] refer to Figure 1 - Figure 2 As shown, a forma simulation device includes a slit plate base 31, a hole plate 32, a slit plate body 33, and a clamp assembly.

[0036] refer to Figure 1 - Figure 2 As shown, the slit plate body 33 includes two plates 332, and the first slit plate 331 and the second slit plate 332, the slit plate body 33, and the first slit plate 331, and the second slit plate 332 are two plates constituting the crack 34. A gap is formed between the dock plate 332, which is a crack 34, in order to make the crack 34 more true, the first slit plate 331 is provided with a plurality of bumps, the second sewing plate 332 towards one side of the second slit plate 332. A plurality of grooves are provided on one side of the first slit 331, and the plurality of protrusions can be adapted to each other; the grooves and projections are formed by three-dimensional laser etching. Figure 5 The degraded texture of etching according to the true crack form is formed, which form...

Embodiment 2

[0053] refer to Figure 8 As shown, a crack shower, which includes a wellbore simulation device 1, a carrier power test device 2, a data acquisition and processing apparatus, a formation simulation device 3 in the above-described embodiment; wherein the pressure relief capability test device 2 is connected. To the inner cavity of the wellbore simulation device 1, the working fluid is added to the wellbore simulation device 1 and provide an alternate pressure for the wellbore simulation device 1; the wellbore simulation device 1 is used to accommodate the plug-in material and simulate the environment in the loophole to establish a leak process. The outlet end of the wellbore simulation apparatus 1 is connected to the formation simulation device 3, and the wellbore simulation device 1 will push the plug material through the pressing capacity test device 2 to the leak passage of the formation simulation device 3; data acquisition and processing device and The wellbore simulation appar...

Embodiment 3

[0064] After the wellbore simulation apparatus 1 and the formation dielectric device 3 in the above Example 2, the retrofitability test device 4 can be connected at the liquid tube 35 of the formation simulation device 3, and the return capacity test device 4 includes a circulating mud pump 42 and The buffer container 41, the circulating mud pump 42 and the buffer container 41 are connected to the yards 35 of the formation simulation apparatus 3 connected to the formation, and construct the return capacity test device.

[0065] The return capacity testing process is to connect the liquid tube 35 of the formation simulation device 3 to the retrofitability test device 4, and inverted the mud or clean water through the circulating mud pump 42, into the formation simulation device 3, by metering formation simulation device 3 into liquid The amount of liquid at the end calculates the return to the plug material, thus testing the retrofitability of the formation simulation module 3.

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Abstract

The invention provides a stratum simulation device and a crack plugging instrument. The stratum simulation device comprises a pore plate, a crack plate body, a crack plate base body and a hoop assembly; the crack plate body is arranged in the crack plate base body, and a three-dimensional curved surface crack etched according to the real crack form is formed in the crack plate body; the pore plate is arranged at the top of the crack plate body; the pore plate and the crack plate base body are limited and fixed through the hoop assembly; the stratum simulation device solves the problem that a stratum simulation device of an existing plugging evaluation device is difficult to truly simulate a stratum leakage channel; the crack plugging instrument comprises a shaft simulation device, a pressure bearing capacity testing device, a data acquisition and processing device and a stratum simulation device, wherein the pressure bearing capacity testing device is connected with an inner cavity of the shaft simulation device, and the liquid outlet end of the shaft simulation device is connected with the stratum simulation device; and the crack plugging instrument solves the technical problems that an existing plugging evaluation device is complex in experimental process, high in operation difficulty and incapable of comprehensively evaluating various parameters of a plugging formula.

Description

Technical field [0001] The present invention relates to the field of drilling fluid plugging testing, in particular, to formation simulation, crack plug gauges. Background technique [0002] In recent years, global oil and gas resource exploration and development continue to be advanced for deep, complex layers, and in the development of middle and late blocks. With the development of complex formation cracks, the stratum pressure capacity will gradually decrease, often accompanied by the occurrence of fluid drain, and once there is a lot of leakage in the drilling, it will seriously affect the quality and cost control, damage The reservoir and causes a complex accident underground, and has a serious restriction on the development and economic benefits of oil and gas resources. Conventional plugging method, such as a bridge paste or with drill plugging technology, it is no longer able to fully solve the actual line drain problem, and should have less technique for malignant fluid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B49/00E21B47/00E21B47/06E21B33/13
CPCE21B49/00E21B47/00E21B47/06E21B33/13
Inventor 朱金智尹达李宁张震郭斌王涛罗威陈林晏智航李磊康毅力游利军许成元张敬毅
Owner PETROCHINA CO LTD
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