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Process for recycling oil base mud from oil base mud well drilling waste

A technology for drilling waste and oil-based mud, which is applied in the technical field of recovering oil-based mud from oil-based mud drilling waste, can solve the problems of pollutant diffusion, secondary pollution, and high environmental conditions, and achieve economic benefits and Uniform environmental benefits, strong anti-wear and blocking ability, good stability and reliability

Active Publication Date: 2014-04-30
四川博盛永业工程技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The incineration method requires a large investment, high operating costs, and is likely to cause secondary pollution
Landfill treatment does not realize the true harmlessness of pollutants, but only transfers pollutants to the ground, and encounters rainfall or underground runoff, which may lead to the spread of pollutants
The microbial treatment cycle is long and requires high environmental conditions

Method used

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  • Process for recycling oil base mud from oil base mud well drilling waste
  • Process for recycling oil base mud from oil base mud well drilling waste
  • Process for recycling oil base mud from oil base mud well drilling waste

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A resource recycling project of diesel-based mud in oil-based drilling waste was implemented in an oilfield in Xinjiang. Oil-based drilling waste mainly includes waste oil-based mud and oily drilling cuttings, with an oil content of about 20-30%. In this embodiment, the drilling process is mainly sandstone, and the cuttings are mainly sandstone particles. The particle size of the cuttings is relatively large, about 0.2-10mm, and the mechanical strength and hardness of the particles are relatively high. Rotating speed. The design approved treatment capacity is 0.5m 3 / h equipment to investigate the processing capacity, processing effect and process stability of the process.

[0031] combine figure 1 , The feed section is equipped with a feed screen with an aperture of 4cm to prevent foreign matter from entering the centrifugal filter equipment and causing blockage. After passing through the feeding screen, the maximum particle size of the solid phase is 3~4cm, the med...

Embodiment 2

[0049] A resource recycling project of diesel-based mud in oil-based drilling waste was implemented in an oilfield in Xinjiang. The drilling process was dominated by sandstone, and the characteristics of the drilling waste material were the same as in Example 1. In this example, the design and approved treatment capacity was adopted. 3m 3 / h equipment to investigate the processing capacity, processing effect and process stability of the process.

[0050] In the feeding section, a feeding screen is added, and the aperture of the screen is 3cm. After passing through the feeding screen, the maximum particle size of the solid phase is 2.6cm, the median particle size is about 1.0mm, and the liquid content of the solid phase is about 21 %.

[0051] Comprehensive selection of filters with apertures of 0.5, 0.8, 1.5, 2.0, 4.0, and 5.0 mm for centrifugal filtration, the centrifugal speed is 1000r / min, the implementation effect of centrifugal filtration with different apertures is show...

Embodiment 3

[0066] A resource recycling project of diesel-based mud in oil-based drilling waste was implemented in an oilfield in Xinjiang. In this example, the drilling process was dominated by mudstone, and the drilling cuttings mainly included mudstone cuttings, whose particle mechanical strength was low, and the particle The diameter is small, about 0.05~0.1mm. In this embodiment, the design approved treatment capacity is 0.5m 3 / h equipment to investigate the processing capacity, processing effect and process stability of the process. The process includes feed filtration, centrifugal filtration, and centrifugal sedimentation.

[0067] The feeding section is equipped with a feeding screen with an aperture of 3 cm. After passing through the feeding screen, the maximum particle size of the solid phase is 2.6 cm, the median particle size is about 1.0 mm, and the liquid content of the solid phase is about 16%.

[0068] During the implementation process, in view of the small particle size...

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Abstract

The invention belongs to the field of oil base mud or drilling cutting treatment, and particularly relates to a process for recycling oil base mud from oil base mud well drilling waste. The process is characterized in that the treating and recycling process comprises the process of efficient centrifugal filtration, homogenizing and centrifugal sedimentation, the oil base mud in the oily waste generated in the oil base mud well drilling engineering is efficiently recycled through optimization of process parameters, and the standard of reusing the well drilling process is met. The process has the advantages that the recovery rate of the oil base mud is high, the recycled oil base mud can be directly reused in the well drilling engineering, secondary pollution is not generated, the process is simple, and the operating condition is mild, and the process is suitable for treating the oily waste generated in various oil base mud well drilling engineering. After the treating and recycling process carries out treatment, the oil base mud resources in the oily waste are efficiently recycled, the recovery rate is high, the pollutant load is greatly reduced, and obvious economic benefits and environmental benefits are achieved.

Description

technical field [0001] The invention belongs to the field of resource recovery and oily waste treatment from oil-based waste produced in oil-based mud drilling engineering, and in particular relates to a process for recovering oil-based mud from oil-based mud drilling waste. [0002] Background technique [0003] Oil-based mud has significant advantages for drilling, especially in salt-gypsum formations and water-sensitive formations. Oil-based mud uses diesel oil, white oil, bio-oil, mineral oil, synthetic oil, etc. as the base oil to add various oilfield chemical agents, and is currently the most commonly used type of oil-based mud in the world. Oil-based mud drilling wastes are generated during oil-based mud drilling, mainly including oily drill cuttings, mud leakage from shale shaker, cementing flowback mixed slurry, plugging flowback fluid, well completion cleaning tank bottom mud, etc. Single well production is about 250-500m 3 range, the oil content is about 18~25%...

Claims

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Application Information

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IPC IPC(8): E21B21/06
Inventor 王兵任宏洋黎跃东徐阳
Owner 四川博盛永业工程技术有限公司
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