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Dendritic multi-amino polymer drilling fluid used for mud rock well drilling

A drilling fluid and polymer technology, which is applied in the field of drilling fluids, can solve the problems such as the inability to completely solve the problems of reducing diameter and blocking of colloidal mudstone formations, failing to meet the environmental protection requirements of drilling engineering, and difficult to control the performance of drilling fluids, so as to avoid water absorption, expansion and dispersion. , Improve drilling efficiency and reduce reservoir damage

Active Publication Date: 2014-11-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The drilling fluids currently used either cannot completely solve the shrinkage blocking of the gelatinous mudstone formation, or the performance of the drilling fluid is not easy to control; or the cost is high, the biological toxicity is high, and it cannot meet the environmental protection requirements of the current drilling engineering

Method used

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  • Dendritic multi-amino polymer drilling fluid used for mud rock well drilling
  • Dendritic multi-amino polymer drilling fluid used for mud rock well drilling
  • Dendritic multi-amino polymer drilling fluid used for mud rock well drilling

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Example 1 Inhibition of Xuanhua Bentonite Slurry and Temperature Resistance Evaluation

[0038] Add 35% Xuanhua bentonite to the drilling fluid formula 1, put it into the aging tank and roll and age at different temperatures for 16 hours, and measure the rheology of the drilling fluid after cooling to room temperature. The data are shown in Table 1.

[0039] Drilling fluid formula 1: 10 parts by weight of dendritic polyamine-based polymer; 4 parts by weight of bentonite in drilling fluid; 2 parts by weight of soda ash; 2 parts by weight of polymer coating agent; 2 parts by weight of potassium polyacrylate; hydrolyzed polyacrylonitrile ammonium salt 15 parts by weight; 10 parts by weight of anti-mud bag lubricant; 1000 parts by weight of water.

[0040] Table 1 Inhibition of Xuanhua bentonite pulping and temperature resistance (the following is the mass fraction)

[0041] drilling fluid

Experimental conditions

PV

YP

Drilling fluid formula 1+35%...

Embodiment 2

[0045] Example 2 Shale Rolling Recovery Rate Determination Test

[0046] Refer to "Zhang Xiaohua, Luo Xingshu, et al., "Modern Mud Experimental Technology" to suppress the shale dispersion experiment (page 45).

[0047] Drilling fluid formula 1: 10 parts by weight of dendritic polyamine-based polymer; 4 parts by weight of bentonite in drilling fluid; 2 parts by weight of soda ash; 2 parts by weight of polymer coating agent; 2 parts by weight of potassium polyacrylate; hydrolyzed polyacrylonitrile ammonium salt 15 parts by weight; 10 parts by weight of anti-mud bag lubricant; 1000 parts by weight of water.

[0048] Organic amine strong inhibition anti-slump drilling fluid: organic amine inhibitor G319-FTJ 1.0%-2.0%, organic inhibitor 0.3%-0.5%, viscosifier 0.3%-0.5%, low viscosity polyanionic cellulose PAC-LV 0.3-0.5%, high viscosity polyanionic cellulose PAC-HV 0.3-0.6%, barite 0-3%, preservative 0.05-0.2%, defoamer 0.1-0.3%, and the balance is water. (Refer to the Chinese p...

Embodiment 3

[0059] Embodiment 3 biological toxicity evaluation

[0060] Detected by China Oceanic Administration Tianjin Marine Monitoring Center Station, the LC of the present invention 50 The value is 35000mg / L, which is a non-toxic product.

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PUM

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Abstract

The invention relates to a dendritic multi-amino polymer drilling fluid used for mud rock well drilling. The drilling fluid is characterized by consisting of a dendritic multi-amino polymer, drilling fluid bentonite, sodium carbonate, a polymer coating agent, potassium polyacrylate, a hydrolyzed polyacrylonitrile ammonium, a bit balling resistant lubricant and water. The dendritic multi-amino polymer drilling fluid can improve an inhibitive performance of the drilling fluid, can greatly improve the inhibitive performance on clay and drilled chips of the drilling fluid, can reduce plasticity of daub rock, can avoid water-absorption swelling and dispersing of the daub rock, can reduce friction resistance, can prevent bit balling, can increase a penetration rate and can ensure safety of a downhole operation.

Description

technical field [0001] The present invention relates to the drilling fluid used in the oil drilling process, in particular to a dendritic polyamine-based polymer drilling fluid used for mudstone drilling. Background technique [0002] When drilling in oil wells, you will encounter gelatinous mudstone formations. The gelatinous mudstone is extremely plastic, and it is easy to absorb water and swell, resulting in diameter shrinkage, causing mud bagging and jamming of the drill bit, which greatly threatens downhole safety and is harmful to drilling construction. It has always been a problem in China Problems in the field of petroleum engineering abroad. During the drilling operation, once the glue mudstone shrinks and jams, the drilling time will be delayed, resulting in a series of downhole complex situations and accidents such as drill sticking. In severe cases, improper handling may even lead to the scrapping of the wellbore, resulting in major economic losses. [0003] Hua...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/24
CPCC09K8/24C09K2208/02C09K2208/12C09K2208/34
Inventor 张国刘贵传石秉忠徐江王海波梅春桂高伟
Owner CHINA PETROLEUM & CHEM CORP
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