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Novel foam drilling fluid system and preparation method thereof

A foam and drilling technology, applied in chemical instruments and methods, drilling compositions, etc., can solve the problems of high cost and high consumption of foaming agents

Inactive Publication Date: 2017-12-22
CHINA UNITED COALBED METHANE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The half-life of the foam drilling fluid is as high as 80 minutes, which is very low, and the amount of foaming agent used is high and the cost is high

Method used

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  • Novel foam drilling fluid system and preparation method thereof
  • Novel foam drilling fluid system and preparation method thereof
  • Novel foam drilling fluid system and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] A novel foam drilling fluid system comprising the following components:

[0056] 0.2wt% foam stabilizer;

[0057] 0.2 wt% carboxymethyl cellulose;

[0058] 0.8wt% high viscosity polyanionic cellulose PAC-HV;

[0059] 0.2wt% lignite resin;

[0060] 0.1wt% barite;

[0061] The balance is water; wherein the basis of the mass percentage of each component is water.

[0062] The preparation method of the foam drilling fluid system described in the present embodiment comprises the following steps:

[0063] (1) Take 100ml of water and add it to the mixing cup, turn on the stirrer and stir at 11000r / min;

[0064] (2) Add 0.2wt% carboxymethyl cellulose, continue to stir to make it fully dissolve, add 0.8wt% high-viscosity polyanion cellulose PAC-HV, continue to stir to make it fully dissolve, add 0.2wt% lignite resin, continue Stir to fully dissolve, add 0.1wt% barite, continue to stir to fully disperse, add 0.2wt% foam stabilizer, and continue to stir for 2 minutes to prep...

Embodiment 2

[0068] A novel foam drilling fluid system comprising the following components:

[0069] 0.2wt% foam stabilizer;

[0070] 0.2 wt% biopolymer XC;

[0071] 0.8 wt% hydroxyethyl cellulose;

[0072] 0.2wt% hydroxypropyl starch;

[0073] 0.1 wt% calcium carbonate;

[0074] The balance is water; wherein the basis of the mass percentage of each component is water.

[0075] The preparation method of the foam drilling fluid system described in the present embodiment comprises the following steps:

[0076] (1) Take 100ml of water and add it to the mixing cup, turn on the stirrer and stir at 11000r / min;

[0077] (2) Add 0.2wt% biopolymer XC, continue to stir to make it fully dissolve, add 0.8wt% hydroxyethyl cellulose, continue to stir to make it fully dissolve, add 0.2wt% hydroxypropyl starch, continue to stir to make it fully Dissolve, add 0.1wt% calcium carbonate, continue to stir to make it fully dispersed, add 0.2wt% foam stabilizer, and continue to stir for 2 minutes to prepar...

Embodiment 3

[0081] A novel foam drilling fluid system comprising the following components:

[0082] 0.2wt% foam stabilizer;

[0083] 0.2 wt% carboxymethyl cellulose;

[0084] 0.8 wt% hydroxyethyl cellulose;

[0085] 0.2wt% hydroxypropyl starch;

[0086] 0.1wt% barite;

[0087] The balance is water; wherein the basis of the mass percentage of each component is water.

[0088] The preparation method of the foam drilling fluid system described in the present embodiment comprises the following steps:

[0089] (1) Take 100ml of water and add it to the mixing cup, turn on the stirrer and stir at 11000r / min;

[0090] (2) Add 0.2wt% carboxymethylcellulose, continue to stir to make it fully dissolve, add 0.8wt% hydroxyethyl cellulose, continue to stir to make it fully dissolve, add 0.2wt% hydroxypropyl starch, continue to stir to make it Fully dissolve, add 0.1wt% barite, continue to stir to make it fully dispersed, add 0.2wt% foam stabilizer, and continue to stir for 2 minutes to prepare a ...

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Abstract

The invention relates to a novel foam drilling fluid system and a preparation method thereof. The novel foam drilling fluid system is developed on the basis of the development of a novel foaming foam stabilizer. The novel foaming foam stabilizer has the advantages of novel structure and excellent performance. A small amount of the foaming foam stabilizer can generate a large amount of foam, and the half-life of the foam can reach more than 3 times that of foam generated by a conventional foaming agent. A single foaming foam stabilizer can achieve the compounding effects of a plurality of foaming agents in the prior art, and the dosage is less. The novel foam drilling fluid system developed on the basis of the novel foaming foam stabilizer has a half-life up to 7.1 d when the foaming foam stabilizer is added in a small amount, the half-life of the novel foam drilling fluid system is obviously better than the half-life of a foam drilling fluid formulated by the conventional foaming agent The novel foam drilling fluid system has good performance, can resist temperature of 120 DEG C, can resist salt of 10%, and can resist rock debris pollution of 12%, shale recovery rate is 90% or more, the linear expansion reduction rate is 80% or more. The novel foam drilling fluid system is free of seepage loss in 80 / 120-mesh gravel, the seepage loss is 1.2 ml or less in 40 / 80-mesh gravel, and the novel foam drilling fluid system can effectively meet the requirements of on-site construction.

Description

technical field [0001] The invention belongs to the technical field of oil and natural gas drilling, and relates to a novel foam drilling fluid system and a preparation method thereof. Background technique [0002] Compared with conventional drilling fluid, foam drilling fluid has a lower density, can increase drilling speed of drilling machinery, can solve formation leakage and other problems, and has low filtration loss, low reservoir damage, and has a wide field application prospect. Foam drilling fluid is generally prepared by treating agents such as foaming agent, foam stabilizer, viscosifier, fluid loss reducer, weighting agent, etc. Among them, foaming agent is one of the core treating agents, which is to make foam easy to generate and A treatment agent that has a certain stability after production. The main types of foaming agents include anionic, cationic, amphoteric, and nonionic. Among them, anionic foaming agents have high foaming performance, wide application, ...

Claims

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Application Information

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IPC IPC(8): C09K8/38
CPCC09K8/38
Inventor 李志勇孙晗森宋吻吻王德桂张丰琰马洪涛张申申刘华康
Owner CHINA UNITED COALBED METHANE
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