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An oil-in-water emulsified drilling fluid resistant to high temperature of 240°C

A technology for emulsified drilling fluid and oil-in-water, which is applied in the directions of drilling compositions, chemical instruments and methods to achieve the effects of less damage to the reservoir, good lubrication and stable performance

Active Publication Date: 2017-08-25
湖北油田化学产业技术研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the temperature resistance of the oil-in-water drilling fluid system is gradually improving, for the exploration and development of high-temperature deep well reservoirs in buried hills like Nanpu Oilfield, oil-in-water drilling fluids that can withstand high temperatures of 240°C are required. Oil drilling fluid can not meet its requirements

Method used

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  • An oil-in-water emulsified drilling fluid resistant to high temperature of 240°C

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] First determine the weight of each part according to the preparation requirements, and then weigh the raw materials according to the following parts by weight.

[0044] 70 parts of water;

[0045] 30 parts of 5# white oil;

[0046] 0.2 parts of caustic soda;

[0047] 3.0 parts of tackifiers are prepared by mixing attapulgite clay and sepiolite, and the ratio of attapulgite clay to sepiolite is 3.5:1.5;

[0048] 5.0 parts of the main emulsifier, made of fatty alcohol polyoxyethylene ether sulfosuccinic acid monoester disodium, rosin acid sodium, fatty alcohol polyoxyethylene ether AEO9 at a temperature of 80 ° C and 10,000 rpm under high-speed stirring for 20 Prepared in minutes, the ratio of fatty alcohol polyoxyethylene ether sulfosuccinic monoester disodium: sodium rosinate: fatty alcohol polyoxyethylene ether AEO9 is 2: 2.5: 1.5;

[0049] 1.0 parts of co-emulsifier, prepared by mixing calcium dodecylbenzenesulfonate, vegetable oleic acid, and 5# white oil at a tem...

Embodiment 2

[0055] First determine the weight of each part according to the preparation requirements, and then weigh the raw materials according to the following parts by weight.

[0056] 70 parts of water;

[0057] 30 parts of 5# white oil;

[0058] 0.1 parts of caustic soda;

[0059] 2.0 parts of tackifier, made by mixing attapulgite clay and sepiolite, the ratio of attapulgite clay to sepiolite is 3:1;

[0060] 4.0 parts of the main emulsifier, made of fatty alcohol polyoxyethylene ether sulfosuccinic acid monoester disodium, rosin acid sodium, fatty alcohol polyoxyethylene ether AEO9 at a temperature of 80 ° C and 10,000 rpm under high-speed stirring for 20 Prepared in minutes, the ratio of fatty alcohol polyoxyethylene ether sulfosuccinic monoester disodium: sodium rosinate: fatty alcohol polyoxyethylene ether AEO9 is 1: 2: 1;

[0061] 1.0 parts of co-emulsifier, prepared by mixing calcium dodecylbenzenesulfonate, vegetable oleic acid, and 5# white oil at a temperature of 80°C and s...

Embodiment 3

[0067] First determine the weight of each part according to the preparation requirements, and then weigh the raw materials according to the following parts by weight.

[0068] 70 parts of water;

[0069] 30 parts of 5# white oil;

[0070] 0.4 parts of caustic soda;

[0071] 4.0 parts of tackifier, made by mixing attapulgite clay and sepiolite, the ratio of attapulgite clay to sepiolite is 4:2;

[0072] 6.0 parts of the main emulsifier, made of fatty alcohol polyoxyethylene ether sulfosuccinic acid monoester disodium, rosin acid sodium, fatty alcohol polyoxyethylene ether AEO9 at a temperature of 80 ° C and 10,000 rpm under high-speed stirring for 20 Prepared in minutes, the ratio of fatty alcohol polyoxyethylene ether sulfosuccinate disodium: sodium abietate: fatty alcohol polyoxyethylene ether AEO9 is 3:3:2;

[0073] 3.0 parts of co-emulsifier, prepared by mixing calcium dodecylbenzenesulfonate, vegetable oleic acid, and 5# white oil at a temperature of 80°C and stirring a...

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Abstract

Belonging to the technical field of drilling fluid of petroleum drilling, the invention relates to a 240DEG C high temperature resistant oil-in-water emulsion drilling fluid. The raw materials include 70 parts of water, 30 parts of base oil, 0.1-0.4 part of caustic soda, 2.0-4.0 parts of a tackifier, 4.0-6.0 parts of a main emulsifier, 1.0-3.0 parts of an auxiliary emulsifier, 2-5 parts of a filtrate reducer, 0.5-2.0 parts of a high temperature stabilizer, and 1.0-3.0 parts of a flow pattern regulator. The preparation method includes: firstly putting water into a 10000rpm high speed mixer, then adding the tackifier, the auxiliary emulsifier, the main emulsifier, the filtrate reducer, the high temperature stabilizer and the flow pattern regulator in order, and at the end of adding and mixing of all the raw materials, further conducting high-speed stirring for 60min under ambient temperature and pressure, thus obtaining the product. Under a high temperature condition, the 240DEG C high temperature resistant oil-in-water emulsion drilling fluid provided by the invention has good emulsification stability, cuttings carrying capacity, water loss and wall building properties, and lubricity.

Description

technical field [0001] The invention relates to an oil-in-water emulsified drilling fluid resistant to a high temperature of 240 DEG C, belonging to the technical field of drilling fluids for petroleum drilling. Background technique [0002] Due to the low formation pressure, deep burial and high formation temperature in the buried hill structural belt of Nanpu Oilfield in the Bohai Bay area, drilling fluid leakage and reservoir damage are prone to occur. In order to discover new oil and gas reservoirs in a timely and accurate manner and develop oil and gas resources more effectively, more underbalanced drilling operations are implemented to maximize the discovery and protection of reservoirs. At present, the drilling fluid systems commonly used in low-pressure and leaky formations at home and abroad include gas drilling fluid, oil-based drilling fluid, oil-in-water drilling fluid, foam drilling fluid and micro-foam drilling fluid, etc., according to different drilling fluid...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/28
CPCC09K8/28
Inventor 王荐向兴金舒福昌吴彬周文涛蒋卓
Owner 湖北油田化学产业技术研究院有限公司
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