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Low-fluorescence high temperature resistant drilling fluid

A technology for drilling fluid and high temperature resistance, applied in the field of drilling fluid, can solve the problem of high fluorescence level, and achieve the effects of good rheological performance, good use effect, and low high temperature and high pressure filtration loss.

Active Publication Date: 2013-10-16
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Overcome the shortcomings of the current high-temperature drilling fluid fluorescence level

Method used

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  • Low-fluorescence high temperature resistant drilling fluid
  • Low-fluorescence high temperature resistant drilling fluid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Material preparation: sodium bentonite, 3%; drilling fluid fluid loss reducer PAMS601, 1.2%; sulfomethyl phenolic resin, 4%; sulfonated lignite resin, 8%; didodecanylamine, 0.6%; sodium sulfite, 0.8%; fatty alcohol polyoxyethylene ether, 0.15%; sodium alkylbenzene sulfonate, 0.1%; the rest is water. The mass percentage of each component is 100%.

[0036] Base slurry preparation: Add water into the container, add sodium-based bentonite while stirring, continue stirring for 150 minutes, stop stirring, and put the container in a curing box at 24±1°C for 24 hours;

[0037] Drilling fluid preparation: Add drilling fluid fluid loss reducer PAMS601, sulfomethyl phenolic resin, sulfonated lignite resin, dodecylamine, sodium sulfite, and fatty alcohol polyoxyethylene to the sodium-based bentonite-based slurry after curing. For ether and sodium alkylbenzene sulfonate, stir for 30 minutes after each material is added, and then stir for 120 minutes at 12,000 rpm.

[0038] Evaluat...

Embodiment 2

[0045] Material preparation: sodium bentonite, 4%; drilling fluid fluid loss reducer PAMS601, 1.0%; sulfomethyl phenolic resin, 2.5%; sulfonated lignite resin, 5%; didodecanylamine, 0.8%; sodium sulfite, 0.8%; fatty alcohol polyoxyethylene ether, 0.15%; sodium alkylbenzene sulfonate, 0.1%; barite powder 8%; the rest is water, and the mass percentage of each component is 100%.

[0046] Base slurry preparation: Add water into the container, add sodium-based bentonite while stirring, continue stirring for 180 minutes, stop stirring, and put the container in a curing box at 24±1°C for 24 hours;

[0047] Drilling fluid preparation: Add drilling fluid fluid loss reducer PAMS601, sulfomethyl phenolic resin, sulfonated lignite resin, dodecylamine, sodium sulfite, and fatty alcohol polyoxyethylene to the sodium-based bentonite-based slurry after curing. Ether, sodium alkylbenzene sulfonate, and barite, stir for 40 minutes after each material is added, and then stir for 130 minutes at 10,...

Embodiment 3

[0054] Material preparation: sodium bentonite 4%, drilling fluid fluid loss reducer PAMS601, 1.0%; sulfomethyl phenolic resin, 3%; sulfonated lignite resin, 6%; didodecanylamine, 0.8%; sodium sulfite, 0.8% %; fatty alcohol polyoxyethylene ether, 0.15% g, sodium alkylbenzene sulfonate A-20, 0.15%; barite powder, 12%; the rest is water. The mass percentage of each component is 100%.

[0055] Base slurry preparation: Add water into the container, add sodium-based bentonite while stirring, continue stirring for 180 minutes, stop stirring, and put the container in a curing box at 24±1°C for 24 hours;

[0056] Drilling fluid preparation: Add drilling fluid fluid loss reducer PAMS601, sulfomethyl phenolic resin, sulfonated lignite resin, dodecylamine, sodium sulfite, and fatty alcohol polyoxyethylene to the sodium-based bentonite-based slurry after curing. Ether and sodium alkylbenzene sulfonate A-20, barite, add each material and stir for 40 minutes, after all are finished, then st...

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Abstract

A low-fluorescence high temperature resistant drilling fluid is applied to exploratory well drilling in high-temperature formations of deep wells. The drilling fluid comprises, by weight, 1.0-2.5% of a drilling fluid loss agent PAMS601, 2-4% of sulfonated methypheuo formald-ehyde, 4-8% of sulfonated lignite resin, 0.6-1.0% of di-n-dodecylamine, 0.1-0.5% of fatty alcohol-polyoxyethylene ether, 0.8-1.5% of Na2SO3, 0.1-0.3% of sodium alkyl benzene sulfonate and 30-90% of water. The low-fluorescence high temperature-resistant drilling fluid has the advantages that the fluorescence grade of the drilling fluid system is lower than Grade 5, the temperature resistant ability is above 200 DEG C, and the fluid can restrain formation mud making, improves stability of well walls, controls reservoir clay swelling and improves reservoir protection effects, besides, the fluid has the advantages of being stable at the high temperature, low in fluorescence and particularly applicable to deep well drilling.

Description

technical field [0001] The invention relates to the technical field of drilling fluid in the exploration and development of oil and natural gas, in particular to a low-fluorescence and high-temperature-resistant drilling fluid. Background technique [0002] Deep well drilling fluid systems mainly include oil-based drilling fluid, oil-in-water drilling fluid and water-based polysulfonate drilling fluid. Oil-based drilling fluid has high fluorescence, which is not conducive to the discovery of oil and gas reservoirs, cannot meet the safety and environmental protection requirements, and is high in cost, which is not conducive to popularization and application; oil-in-water drilling fluid has the characteristics of both oil-based and water-based drilling fluid, and diesel or mineral oil is used It is formulated, in which the oil component accounts for more than 20%, there are still problems of fluorescence, environmental protection and high cost of drilling fluid, and it cannot ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/14
Inventor 卢淑芹朱宽亮徐同台姜薇邢韦亮张艺馨
Owner PETROCHINA CO LTD
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