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A method and system for harmless treatment and sustainable utilization of drilling waste in oil and gas fields

A technology for the harmless treatment of drilling waste, applied in the field of environmental engineering, can solve the problems of high economic cost, secondary pollution, substandard treatment technology, etc. Effect

Active Publication Date: 2018-10-26
CHENGDU NUODEYUAN ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The current technical treatment basically faces a series of problems such as substandard treatment technology, easy to cause secondary pollution, high economic cost and high energy consumption. Many domestic experts and scholars have conducted a lot of research on these problems, but the effect is not very ideal at present. Pollutants such as organic matter and heavy metals in the drilling waste cannot be completely treated up to the standard

Method used

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  • A method and system for harmless treatment and sustainable utilization of drilling waste in oil and gas fields
  • A method and system for harmless treatment and sustainable utilization of drilling waste in oil and gas fields
  • A method and system for harmless treatment and sustainable utilization of drilling waste in oil and gas fields

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Embodiment

[0042] Treat the fracturing flowback fluid produced in a certain area with the method of the present invention, with a designed treatment capacity of 80m³ / d, and operate continuously for 16 hours a day for 2 months;

[0043] 1. Drilling waste feed index

[0044] Table 1 Drilling waste feed index

[0045]

[0046] 2. Process operating parameters

[0047] Drilling waste enters the pretreatment device, separation device, harmless treatment device, coagulation treatment device, forming device and maintenance device in sequence;

[0048] Pretreatment: Add 20g / kg of oxidative breaker, 10g / kg of one or more of fatty acid, aliphatic amides or ester dispersants, and 20g / kg of polymer dehydrating agent in sequence under stirring conditions , and fully stirred evenly, and reacted for 20 minutes.

[0049] Separation treatment: The pretreated drilling waste is subjected to solid-liquid separation.

[0050] Harmless treatment: Send the separated solid phase into the harmless treatmen...

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Abstract

The invention discloses a method and system applicable to harmless treatment and sustainable utilization of oil and gas field drilling waste and solves the problem that existing drilling waste treatment has difficulty in meeting standards and has resource waste. The method comprises the following steps: (1), pretreating: (2), separating; (3), harmlessly treating; (4), condensing; (5), forming; (6), curing. Through treatment of the invention, organics and heavy metal pollution values in the drilling waste are greatly decreased to national standards, the blank of domestic existing harmless treatment techniques for drilling waste is filled, domestic existing resourceful utilization techniques for drilling waste are also promoted, environmental ecological pollution due to drilling waste is reduced, resource waste due to drilling waste is reduced, ecology destruction is restrained, and cycle concept of sustainable development is formed.

Description

technical field [0001] The invention belongs to the field of environmental engineering and relates to a treatment method for drilling waste in oil and gas fields, in particular to a method and system for harmless treatment and sustainable utilization of drilling waste in oil and gas fields. Background technique [0002] Oil drilling is an important means of oil and gas exploration and development. The wells drilled in the oil industry are generally cylindrical wells with a depth of several hundred meters to several thousand meters. Oil drilling production has the characteristics of field, mobile and independent construction. During the drilling process, the drilling fluid needs to be continuously circulated to avoid downhole accidents. Drilling fluid (or drilling fluid), commonly known as mud, is a working fluid for drilling oil and gas wells. It is a fluid formulated with various raw materials and chemical additives. The drilling fluid circulates through the ground and dow...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B41/00
CPCE21B41/005
Inventor 尹华平巫贤志
Owner CHENGDU NUODEYUAN ENVIRONMENTAL PROTECTION TECH CO LTD
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