No-clay low-solid phase horizontal well section drilling fluid and preparation method thereof

A technology with horizontal well section and low solid phase, which is applied in petroleum drilling engineering and drilling fluid fields, which can solve the problems of not being able to drill for a long time, not being able to drill deep wells, poor temperature resistance of drilling fluid, etc., to achieve suppression of clay hydration and dispersion, Ensure wellbore cleanliness and good temperature resistance

Active Publication Date: 2013-09-04
克拉玛依市金鑫科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention provides a clay-free low-solid horizontal drilling fluid and its preparation method, which overcomes the above-mentioned deficiencies in the prior art and can effectively solve the current There are problems such as poor temperature resistance of drilling fluid, limitation of reservoir texture, inability to drill for a long time, inability to drill deep wells and high cost

Method used

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  • No-clay low-solid phase horizontal well section drilling fluid and preparation method thereof

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Effect test

Embodiment 1

[0014] Embodiment 1, this clay-free low-solid phase horizontal drilling fluid is obtained according to the following preparation method: add 0.2 grams to 0.4 grams of alkalinity regulator and 2 grams to 3 grams of fluid loss reducer per 100 milliliters of water, extract Cutting agent 0.5g to 1g, superfine calcium carbonate 5g to 10g, liquid lubricant 2g to 3g and potassium chloride 3g to 15g, and mix well to obtain clay-free low solid phase horizontal drilling fluid . The application of liquid lubricants in this system mainly includes oil-based liquid lubricants with waste engine oil, aviation kerosene, and mineral oil as the continuous phase.

Embodiment 2

[0015] Embodiment 2, this clay-free low-solid phase horizontal drilling fluid is obtained according to the following preparation method: add 0.2 grams or 0.4 grams of alkalinity modifier, 2 grams or 3 grams of fluid loss reducer, and extract Cutting agent 0.5g or 1g, superfine calcium carbonate 5g or 10g, liquid lubricant 2g or 3g and potassium chloride 3g or 15g, and mix well to obtain clay-free low-solid horizontal drilling fluid .

Embodiment 3

[0016] Embodiment 3, as the preference of the above embodiment, the alkalinity regulator is sodium hydroxide or potassium hydroxide or calcium hydroxide; or / and, the fluid loss control agent is a composite of cellulose and modified starch in a mass ratio of 1:4 , the cellulose is polyanionic cellulose or low viscosity sodium carboxymethyl cellulose or hydroxyethyl cellulose, the modified starch is hydroxypropyl starch derivatives or sodium carboxymethyl starch or hydroxyethyl starch; or / and , the cutting agent is xanthan gum or solid-free drilling fluid weak gel cutting agent or biopolymer.

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Abstract

The invention relates to the technical field of drilling fluid used for the field of petroleum drilling engineering, and in particular relates to a no-clay low-solid phase horizontal well section drilling fluid and a preparation method of the drilling fluid. The no-clay low-solid phase horizontal well section drilling fluid is prepared by adding an alkalinity regulator, a filtrate reducer, an extracting agent, calcium carbonate superfine powder, a liquid lubricant and potassium chloride into water, and evenly mixing. The no-clay low-solid phase horizontal well section drilling fluid and the preparation method of the drilling fluid are simple, convenient and easy in technology, low in cost, beneficial to carrying rock debris in the horizontal section drilling process, good in temporary blockage capability and thorough in blockage removal, guarantee a wellbore to be clean, avoid the damage of highly-dispersed clay particles to the reservoir stratum, effectively prevent solid phase and liquid phase from invading the stratum, inhibit the hydration dispersing of the clay of the stratum, can effectively control the depth of a pollution zone, can well protect the reservoir stratum even if the well depth is increased and the work period is prolonged, are used for an underbalanced well, are good in temperature resistance, have the highest temperature resistance reaching up to 140 DEG C, and are suitable for all horizontal well reservoir stratum sections with the inclined depths not exceeding 5000m.

Description

technical field [0001] The invention relates to the technical field of drilling fluid used in the field of petroleum drilling engineering, and relates to a clay-free low-solid phase horizontal drilling fluid and a preparation method thereof. Background technique [0002] In order to make the oil layer have the largest seepage area, horizontal wells have been used as one of the main production stimulation methods in domestic oilfields, and most of them adopt open-hole completion and screen (slotted liner) completion methods, which can completely expose the oil layer and solve the problem of drilling. Reservoir protection during well completion is of great significance. Domestic research on drilling fluids and completion fluids for horizontal wells is active. Among water-based drilling fluids, solid-free and low-solid drilling fluids are mainly used. The prior art includes: 1. The Chinese patent document with publication number 101955760A discloses a solid-free drilling fluid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/10
Inventor 王茂仁冯建建王晨王军肖达士许传云钱续军
Owner 克拉玛依市金鑫科技有限公司
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