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A kind of medium-high temperature strong plugging hard rubber micro-foam drilling fluid and preparation method thereof

A drilling fluid, medium and high temperature technology, applied in chemical instruments and methods, drilling compositions, geothermal power generation, etc., can solve the problems of insufficient compression resistance, few cycles, insufficient temperature resistance, etc. The effect of accuracy, saving equipment cost and saving preparation time

Active Publication Date: 2022-07-12
中石化石油工程技术服务有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to solve the problems of insufficient temperature resistance, short half-life, less cycle times, insufficient pressure resistance and poor plugging performance of conventional recirculating foam drilling fluids, and to provide a medium-high temperature strong plugging hard rubber drilling fluid. Foam drilling fluid and preparation method thereof

Method used

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  • A kind of medium-high temperature strong plugging hard rubber micro-foam drilling fluid and preparation method thereof
  • A kind of medium-high temperature strong plugging hard rubber micro-foam drilling fluid and preparation method thereof
  • A kind of medium-high temperature strong plugging hard rubber micro-foam drilling fluid and preparation method thereof

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preparation example Construction

[0048] The invention provides a medium and high temperature strong plugging hard rubber micro-foam drilling fluid or completion fluid and a preparation method thereof, wherein:

[0049] A medium-high temperature strong plugging hard rubber micro-foam drilling fluid or completion fluid, which comprises, according to parts by mass:

[0050] Sodium bentonite, 0 to 3 parts;

[0051] Low molecular weight anti-high temperature foam stabilizer, 0.1 to 0.2 parts;

[0052] Bubble film density reducing agent, 1-2 servings;

[0053] Wetting agent, 0.1 to 0.2 parts;

[0054] Foaming agent, 0.3 to 0.5 parts;

[0055] Sulfonate polymer fluid loss reducer, 0.1 to 0.5 parts;

[0056] Temperature-resistant resin fluid loss reducer, 2 to 3 parts;

[0057] Foam surface viscosity modifier, 0.1 to 0.3 parts;

[0058] Low-density plugging agent, 2 to 4 parts;

[0059] Alkaline regulator, 0-0.1 part;

[0060] Water, 100 parts.

[0061] in:

[0062] The foam stabilizer is one of a hydrophob...

Embodiment 1

[0074] Take 100 parts of clean water, add 0.1 part of low molecular weight anti-high temperature foam stabilizer TFS to it, stir with a low-speed agitator for 2 hours; add 0.2 part of alkylphenol polyoxyethylene ether after uniform dispersion and dissolution, and fully stir for 15min; add modified hard 1.5 parts of husk plant fiber powder, fully stirred for 5 minutes, and left to stand for 2 hours to form a temperature-resistant hard gum base liquid. Accurately weigh 0.3 part of xanthan gum, 0.5 part of sulfonate polymer fluid loss reducer, 0.2 part of sodium dodecylbenzene sulfonate, 0.1 part of sodium dodecyl sulfate, 2 parts of lignite resin and 1 part of phenolic resin Mix evenly, add the above temperature-resistant hard glue base liquid while stirring, stir with a low-speed strong mixer at 900 r / min for 6 hours, then add 2 parts of non-penetrating treatment agent and 1 part of mica fiber respectively, and stir for 30 minutes.

Embodiment 2

[0076] Take 100 parts of clean water, add 0.2 part of low molecular weight anti-high temperature foam stabilizer TFS to it, stir with a low-speed mixer for 2 hours; after uniform dispersion and dissolution, add 0.2 part of polysorbate respectively, stir well for 15 minutes; add modified hard shell 1.5 parts of plant fiber powder, fully stirred for 5 minutes, and allowed to stand for 2 hours to form a temperature-resistant hard gum base liquid. Accurately weigh 2 parts of sodium bentonite, 0.08 part of sodium carbonate, 0.1 part of hydroxyethyl cellulose, 0.1 part of xanthan gum, 0.3 part of sulfonate polymer fluid loss reducer, 0.2 part of sodium dodecylbenzenesulfonate, 0.1 part of sodium lauryl sulfate, 2 parts of potassium humate fluid loss reducer, and 1 part of sulfonated phenolic resin fluid loss reducer are mixed evenly, and the above temperature-resistant hard gum base liquid is added while stirring. / min stirring for 6h, then adding 1 part of mica fiber and 2 parts of...

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Abstract

The invention discloses a medium-high temperature strong plugging hard rubber recyclable foam drilling fluid and a preparation method thereof. Add low molecular weight anti-high temperature foam stabilizer, wetting agent and foam film density reducing agent to water to form temperature resistant hard base liquid. Add sodium bentonite, alkaline regulator, sulfonate polymer fluid loss reducer, foaming agent, temperature resistant resin fluid loss reducer and foam surface viscosity modifier into the temperature resistant hard gum base liquid to form medium and high temperature hard gum Circulating microfoam drilling fluid or completion fluid. Add low-density plugging agent and stir to form medium and high temperature strong plugging hard rubber micro-foam drilling fluid or completion fluid. The medium and high temperature strong plugging recyclable foam fluid of the invention has low solid phase content, strong membrane structure, and excellent foam stabilization effect before and after medium and high temperature; it can improve the circulation times of the completion fluid after the micro-foam drilling fluid and the effect of plugging, and reduce the loss of drilling fluid , so that the recyclable micro-foam drilling and completion fluid can be safely and efficiently applied to the exploitation of medium, high temperature and low pressure oil and gas resources, geothermal wells, etc., which are easy to leak, and meet the needs of deep well drilling.

Description

technical field [0001] The invention relates to the technical field of leakage prevention and plugging of drilling engineering, in particular to a micro-foam drilling fluid or completion fluid which is resistant to medium and high temperature at 150° C., has strong membrane structure and strong sealing performance, and can be circulated on the ground and in the wellbore and the same. Preparation Process. Background technique [0002] Foam drilling fluid is a low-density key drilling fluid technology for low-pressure and malignant leakage formations. The main development is the inflatable foam drilling fluid technology and the recirculating foam drilling fluid technology. Circulating micro-foam drilling fluid does not require additional special equipment at the well site to reduce the density of drilling fluid, just like water-based drilling fluid is circulated in the well and between drilling tools, so the stability of the foam is required to be high. If the formed microfo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/38C09K8/487
CPCC09K8/38C09K8/487Y02E10/10
Inventor 杨倩云王宝田王旭东袁丽赵红香于雷杨华
Owner 中石化石油工程技术服务有限公司
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