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High temperature resisting rectorite water base drilling fluid for deep stratigraphical drilling

A technology of water-based drilling fluid and rectorite, which is applied in the field of drilling and drilling engineering, can solve problems such as inability to judge formation conditions, deterioration of drilling fluid performance, and poor sand return, and achieve low price, time saving, and high portability. The effect of sand ability

Inactive Publication Date: 2013-11-06
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As the temperature rises, the dispersion and passivation of clay in the drilling fluid and the failure of the drilling fluid treatment agent will deteriorate the performance of the drilling fluid, resulting in resistance to drilling, poor sand return, and inability to judge formation conditions. shrinking accident

Method used

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  • High temperature resisting rectorite water base drilling fluid for deep stratigraphical drilling

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] In the drilling fluid of the present embodiment, each component and the mass volume ratio (unit: Kg / m3) of the drilling fluid and the drilling fluid 3 ) are: 5% sodium-based rectorite, 0.2% polymer fluid loss reducer COP-LFL, 3% HV-CMC, 0.1% coating agent FA367, 4% sulfonated asphalt powder FT-1, 2% drilling Fluid lubricant TNH-2, 1% drilling fluid lubricant RH-2, 0.1% defoamer, 0.1% NaOH, and the rest is water.

[0027] According to the above ratio, mix sodium-based rectorite with water, stir evenly to obtain sodium-based rectorite slurry, then add other various additives and stir to fully dissolve the additives, and after mixing evenly, you can get deep formation drilling Use high temperature resistant rectorite water-based drilling fluid.

[0028] The performance index of the drilling fluid prepared in this example (implementation standard GB / T 16783-1997): the density is 1.04g / cm 3 , the viscosity is 72s, and the medium pressure filtration loss at room temperature...

Embodiment 2

[0030] In the drilling fluid of the present embodiment, each component and the mass volume ratio (unit: Kg / m3) of the drilling fluid and the drilling fluid 3 ) are: 1% sodium-based rectorite, 2% binary copolymer PAMS601, 4% binary copolymer PAMS900, 1.0% LV-CMC, 1.0% CMS, 2% coating agent PAC141, 5% broad-spectrum protective wall Agent GSP, 5% drilling fluid lubricant TNH-2, 0.3% defoamer, 0.4% NaOH, and the rest is water.

[0031] According to the above-mentioned proportions, the same method as in Example 1 was used to prepare to obtain high-temperature resistant rectorite water-based drilling fluid for deep formation drilling.

[0032] The performance index of the drilling fluid prepared in this example (implementation standard GB / T 16783-1997): the density is 1.05g / cm3, the viscosity is 75s, the fluid loss under normal temperature and medium pressure is FL API 3.2ml, high temperature and high pressure filtration loss FL hthp is 12.6ml, plastic viscosity PV is 26mPa·S, dyn...

Embodiment 3

[0034] In the drilling fluid of the present embodiment, each component and the mass volume ratio (unit: Kg / m3) of the drilling fluid and the drilling fluid 3 ) are: 4% sodium-based rectorite, 0.05% polymer fluid loss reducer COP-LFL, 2% binary copolymer PAMS601, 2.0% LV-CMC, 0.1% coating agent PAC141, 0.25% coating agent KPAM, 3.5% sulfonated asphalt powder FT-1, 3% drilling fluid lubricant RH-2, 0.2% defoamer, 0.5% NaOH, and the rest is water.

[0035] According to the above-mentioned proportions, the same method as in Example 1 was used to prepare to obtain high-temperature resistant rectorite water-based drilling fluid for deep formation drilling.

[0036] The performance index of the drilling fluid prepared in this example (implementation standard GB / T 16783-1997): the density is 1.05g / cm 3 , the viscosity is 77s, and the medium pressure filtration loss at room temperature is FL API 3.0ml, high temperature and high pressure filtration loss FL hthp is 11.0ml, plastic vis...

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Abstract

The invention discloses a high temperature resisting rectorite water base drilling fluid for deep stratigraphical drilling, belonging to the technical field of exploration and drilling engineering. The drilling fluid is prepared by mixing 1-5% of sodium rectorite, 0.2-12% of main fluid loss reducing agent, 0.1-3% of auxiliary fluid loss reducing agent, 0.1-2% of coating agent, 1-5% of wall protective agent, 1-5% of lubricating agent for drilling fluid, 0.1-0.3% of defoaming agent, 0.1-0.5% of NaOH and water. The drilling fluid can maintain good rheological property, sand carrying capacity and fluid loss resistance at 200 DEG C, can be used by preparation on site, and is applicable to rapid drilling and exploration operations for deep stratums at high formation temperature, and the required raw materials have low price.

Description

technical field [0001] The invention relates to a drilling fluid, in particular to a high-temperature resistant rectorite water-based drilling fluid for deep formation drilling, belonging to the technical field of drilling and drilling engineering. Background technique [0002] Drilling fluid is an important part of drilling and drilling engineering technology. The performance and quality of drilling fluid have an important impact on the success of drilling and drilling engineering. As the geological and mineral resources, especially oil and gas resources, in shallow formations and easy-to-develop formations are becoming less and less, people's attention is gradually turning to deep formations. It has become a major trend in the field of oil and gas exploration all over the world to seek resources from deep formations, especially oil and gas resources. In our country, this trend is particularly obvious. In order to cope with this dilemma, the state, on the one hand, digs de...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/24C09K8/14
Inventor 靳洪允侯书恩闵浩潘勇肖红艳
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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