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Nitrogen well drilling device and treatment method and application of formation produced water in nitrogen well drilling

A treatment method and technology for producing water, applied in wellbore/well components, earthwork drilling, flushing wellbore, etc., can solve problems such as limiting nitrogen drilling applicability, reducing drilling efficiency, etc., achieving good physical stability and chemical stability. Inertness, improved drilling efficiency, and fast water absorption

Pending Publication Date: 2021-12-24
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For the existing common nitrogen drilling, try not to pass through the water layer, if it is found that the formation produces water greater than 5m 3 It is necessary to switch the drilling method to conventional drilling or foam drilling when drilling per hour. Therefore, the water produced in the formation limits the applicability of nitrogen drilling in the drilling process, thereby reducing the drilling efficiency. The invention provides a nitrogen drilling device and nitrogen drilling The treatment method and application of the formation produced water, using the device and treatment method for nitrogen drilling, can handle the nitrogen drilling conditions with formation produced water, so as to increase the applicability of nitrogen drilling and improve drilling efficiency

Method used

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  • Nitrogen well drilling device and treatment method and application of formation produced water in nitrogen well drilling
  • Nitrogen well drilling device and treatment method and application of formation produced water in nitrogen well drilling
  • Nitrogen well drilling device and treatment method and application of formation produced water in nitrogen well drilling

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] 1) Predict the location and volume of water produced in the formation of Well Xin 10-2;

[0068] ① Predict the distribution of water layers by using well logging data and geological data, where the geological data include water saturation, shale volume fraction, resistivity, effective porosity, neutron porosity, irreducible water saturation and permeability;

[0069] It is predicted that there will be formation water produced at the position of 3210 meters in Well Xin 10-2.

[0070] ② Calculate the water produced in the formation by simulation with the following formula,

[0071]

[0072] in,

[0073]

[0074]

[0075] Among them, r w Supply edge radius for the outlet layer, m; h is the thickness of the water layer, m; φ is the effective porosity, %; μ w is formation water viscosity, mPa s; K w is the effective permeability of the water layer, 10 -3 μm 2 ;C w is the effective compressibility coefficient of the water layer, 1 / MPa; ΔP is the bottom hole pr...

Embodiment 2

[0082] 1) Predict the location and volume of water produced in the formation of Well Xin 10-2;

[0083] According to the method of Example 1, it is predicted that there is formation water produced at the position of 3210 meters in Well Xin 10-2, and the calculated formation water production at the position of 3210 meters is 18m 3 / h.

[0084] 2) use figure 1 The device shown performs nitrogen drilling,

[0085] Apparatus according to Example 1.

[0086] 3) Perform the following operations according to the water output:

[0087] put air in figure 1The air compressor of the nitrogen drilling unit then enters the dryer, membrane separation nitrogen generator, supercharger and wellhead equipment successively, and lifts the drilling tool, and the injection rate of nitrogen is 160m 3 / min, turn on the desiccant powder pump 8 on the pipeline between the booster and the wellhead equipment (relative to every m 3 The amount of nitrogen injection, the pumping amount of the desiccan...

Embodiment 3

[0089] 1) Predict the location and volume of water produced in the formation of Well Xin 10-2;

[0090] According to the method of Example 1, it is predicted that there is formation water produced at the position of 3210 meters in Well Xin 10-2, and the calculated formation water production at the position of 3210 meters is 18m 3 / h.

[0091] 2) use figure 1 The device shown performs nitrogen drilling,

[0092] Apparatus according to Example 1.

[0093] 3) Perform the following operations according to the water output:

[0094] put air in figure 1 The air compressor of the nitrogen drilling unit then enters the dryer, membrane separation nitrogen generator, supercharger and wellhead equipment successively, and lifts the drilling tool, and the injection rate of nitrogen is 160m 3 / min, turn on the desiccant powder pump 8 on the pipeline between the booster and the wellhead equipment (relative to every m 3 The amount of nitrogen injection, the pumping amount of the desicca...

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Abstract

The invention discloses a nitrogen well drilling device and a treatment method and application of formation produced water in nitrogen well drilling. The nitrogen well drilling device comprises an air compressor, a dryer, a membrane separation nitrogen making machine, a supercharger and wellhead equipment which are sequentially connected through pipelines, wherein a drying agent powder pump is arranged on the pipeline between the supercharger and the wellhead equipment and used for conveying a drying agent to adsorb the formation produced water. By adopting the device and the treatment method for nitrogen well drilling, the nitrogen well drilling working condition with the formation produced water can be treated, so that the applicability of nitrogen well drilling can be improved, and the well drilling efficiency is improved.

Description

technical field [0001] The invention relates to a nitrogen drilling device, a treatment method for formation produced water in nitrogen drilling, and the application of the device and the treatment method in well drilling. Background technique [0002] Tight gas reservoirs are characterized by low porosity and low permeability. Compared with medium and high permeability oil and gas reservoirs, such gas reservoirs have complex geological conditions, are vulnerable to reservoir damage and are difficult to remove, and it is difficult to meet the high-efficiency requirements of conventional drilling and completion technologies. development needs. Nitrogen drilling technology uses nitrogen as the drilling circulation medium. Its core advantages lie in improving drilling efficiency, protecting reservoirs, avoiding lost circulation, and downhole explosions. natural gas deposits. However, nitrogen drilling is greatly affected by the water content in the circulating medium, and for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B21/16E21B21/06
CPCE21B21/16E21B21/06
Inventor 许博越张东清张洪宁李鑫王果周号博邢树斌王怡
Owner CHINA PETROLEUM & CHEM CORP
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