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Coiled tubing drilling-plug liquid system and preparing method thereof

A drilling plug and system technology, applied in the field of oil and gas field exploration, can solve the problems of high drilling and grinding construction parameters, high performance requirements of drilling plug liquid, poor carrying suspension effect, resistance when drilling, and achieve high antibacterial efficiency and low cost , cheap effect

Active Publication Date: 2016-03-23
CHINA PETROCHEMICAL CORP +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Coiled tubing is used to drill and grind bridge plugs in horizontal wells. The drilling and grinding construction parameters and the performance of the drilling plug fluid have high requirements. The poor suspension effect of the drilling plug fluid will lead to the formation of cuttings beds in the downhole, which will lead to obstruction and sticking of the drill And other issues

Method used

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  • Coiled tubing drilling-plug liquid system and preparing method thereof
  • Coiled tubing drilling-plug liquid system and preparing method thereof
  • Coiled tubing drilling-plug liquid system and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Measure 100 parts of clear water, under high-speed stirring (8000r / min), add 0.25 parts of low-molecular polymer thickener and stir for 10 minutes; then add 0.1 parts of compound synergist and stir for 10 minutes; add 0.1 parts of Bactericide, after the solution is evenly stirred and stabilized, add 0.1 part of flow pattern improver and stir for 5 minutes; finally add 0.02 part of defoamer and stir for 5 minutes; the high-efficiency suspended drilling liquid mother solution can be formed.

Embodiment 2

[0028] Measure 100 parts of clear water, under high-speed stirring (8000r / min), add 0.25 parts of low-molecular polymer thickener and stir for 10 minutes; then add 0.15 parts of compound synergist and stir for 10 minutes; add 0.3 parts Bactericide, then after the solution is stirred evenly and stably, add 0.3 parts of flow pattern improver and stir for 5 minutes; finally add 0.04 parts of defoamer and stir for 5 minutes; the high-efficiency suspended drilling liquid mother solution can be formed.

Embodiment 3

[0030] Measure 100 parts of clear water, under high-speed stirring (8000r / min), add 0.25 parts of low-molecular polymer thickener and stir for 10 minutes; then add 0.2 parts of compound synergist and stir for 10 minutes; add 0.4 parts of Bactericide, then after the solution is evenly stirred and stabilized, add 0.4 parts of flow pattern improver and stir for 5 minutes; finally add 0.08 parts of defoamer and stir for 5 minutes; the high-efficiency suspended drilling liquid mother solution can be formed.

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Abstract

The invention discloses a coiled tubing drilling-plug liquid system and a preparing method thereof. The coiled tubing drilling-plug liquid system is prepared from, by weight, 0.1-0.5 part of flow type improver, 0.25-0.3 part of a polymer thickening agent, 0.1-0.3 part of composite synergist, 0.1-0.5 part of bactericide and 0.02-0.1 part of an antifoaming agent with water serving as a dispersion medium. After the system is used, the effect of carrying bridge plug debris and fracture sand of suspension of drilling-plug liquid is good, and the drilling-plug liquid to which 0.5% flow type improver is added enables rubber sheets, composite material debris and fracture sand to be suspended, so that formation of a horizontal well rock debris bed is reduced, and frequent trip and even drilling tool jamming accidents are avoided; moreover, at the downhole temperature, viscosity and the shear retention rate of the system are high, which is beneficial for the horizontal section annular space to carry suspended debris and the fracture sand. The system is simple in formula, easy to dissolve and prepare, environmentally friendly, free of toxicity and easy to construct on site, the use amount is small, and the influence on pressure drop of a coiled tubing pipeline is small.

Description

technical field [0001] The invention belongs to the technical field of oil and gas field exploration, and in particular relates to a coiled tubing drilling fluid system and a preparation method thereof. Background technique [0002] Coiled tubing technology has the advantages of simple operation, time saving, safety and reliability, etc. It plays an increasingly important role in oil and gas field exploration and development. It is known as "universal operation equipment" and is widely used in oil and gas field workover, drilling, well completion, Well logging and other operations. In the Fuling National Shale Gas Demonstration Zone, coiled tubing technology has been widely used in drilling and grinding bridge plugs, transmission perforation, downhole fishing, production profile testing, production strings and other operations. Coiled tubing is used to drill and grind bridge plugs in horizontal wells. The drilling and grinding construction parameters and the performance of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/52
CPCC09K8/52
Inventor 陈明晓游云武宋金初梁文利陈智源吴雪平刘俊君
Owner CHINA PETROCHEMICAL CORP
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