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Reagent for preparing reusing petroleum drilling wastewater into slurry for reuse and application thereof

A technology for oil drilling and wastewater, applied in mining wastewater treatment, earth-moving drilling, wellbore flushing, etc., can solve the problems of reducing mud viscosity, hidden danger of sticking, reducing mud viscosity and other performance problems, and achieves the effect of improving suspension.

Inactive Publication Date: 2017-02-22
北京嘉禾天华节能环保科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Disadvantages: Since aluminum sulfate has the effect of breaking the gel and flocculating, the use of aluminum sulfate to prepare sewage to prepare mud will reduce the viscosity and other properties of the mud, and there is a hidden danger of pipe sticking
[0008] Disadvantages: Polyacrylamide has the effect of breaking gel and flocculation. Using a large amount of polyacrylamide to treat sewage to prepare mud will reduce mud viscosity and other properties, and there is a hidden danger of pipe sticking

Method used

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  • Reagent for preparing reusing petroleum drilling wastewater into slurry for reuse and application thereof
  • Reagent for preparing reusing petroleum drilling wastewater into slurry for reuse and application thereof
  • Reagent for preparing reusing petroleum drilling wastewater into slurry for reuse and application thereof

Examples

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Effect test

Embodiment 1

[0030] Example 1: A reagent for slurry reuse of oil drilling wastewater:

[0031] A kind of reagent that is used for the slurry reuse of petroleum drilling waste water is made up of ion removal agent and filtrate conversion agent, and described ion removal agent comprises the sodium carbonate (soda ash) that adds first and the sodium hydroxide (caustic soda) that adds afterwards; The described The filtrate conversion agent is JDKJ-2, an anti-salt fluid loss reducer for drilling fluid; the mass-volume ratio of sodium carbonate to oil drilling wastewater is 5.5-8.5kg / m 3 , the mass volume ratio of sodium hydroxide to oil drilling wastewater is 0.45-0.65kg / m 3 ; The mass-to-volume ratio of salt-resistant fluid loss reducer JDKJ-2 for drilling fluid to oil drilling wastewater is 3-4kg / m 3 .

Embodiment 2

[0032] Example 2: Application of a reagent for the reuse of oil drilling waste water mixing slurry:

[0033] The usage method of a kind of reagent that is used for the reuse of slurry preparation of petroleum drilling wastewater as described in embodiment 1 is: add ion removal agent and filtrate conversion agent in embodiment 1 to petroleum drilling wastewater, wherein sodium carbonate is added first to make wastewater The pH value of the waste water reaches 9; then sodium hydroxide is added to make the pH value of the wastewater reach 12; finally, the anti-salt fluid loss reducer JDKJ-2 is added to treat the filtrate into drilling fluid. Drilling slurry preparation realizes the reuse of drilling filtrate through the following three ways (such as figure 1 shown):

[0034] (1) Drilling slurry can be directly mixed on site to form drilling fluid for each drilling;

[0035] (2) Drilling slurry can be formulated into glue to maintain the performance of drilling fluid; or

[0...

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Abstract

The invention provides a reagent for preparing reusing petroleum drilling wastewater into slurry for reuse and application thereof and belongs to the technical field of petroleum drilling wastewater treatment processes. The reagent is prepared from an ion removing agent and a filtrate conversion agent, wherein the ion removing agent contains early added sodium carbonate and later added sodium hydroxide, and the filtrate conversion agent is a salt-resistant filtrate reducer JDKJ-2 for a drilling fluid. The reagent has the advantages that after the reagent is added to drilling filtrate, the performance of base slurry prepared in any mode is close to or exceeds clear water slurry, and meanwhile the suspension property of the drilling fluid is obviously improved; drilling slurry preparing liquid prepared by treating the filtrate by using the reagent can be used for preparing liquid cement for treating the drilling fluid in a site, and the performance of the liquid cement is equivalent to the performance of liquid cement prepared with clear water.

Description

technical field [0001] The invention belongs to the technical field of oil drilling wastewater treatment technology, and in particular relates to a reagent for mixing and reuse of oil drilling wastewater and its application. Background technique [0002] With the rapid development of my country's economy, environmental protection problems are becoming more and more severe. The coordinated development of the petroleum industry and the ecological environment is an inevitable requirement for the realization of quality, efficiency and sustainable development of the petroleum industry. [0003] The 16 oil and gas field enterprises affiliated to PetroChina drill about 20,000 wells each year. The amount of waste drilling fluid produced during the drilling process is huge, of which about 90% use water-based drilling fluid. The harmless treatment of a large amount of waste water-based drilling fluid has become a must for PetroChina. problems that need to be solved urgently. [0004]...

Claims

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Application Information

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IPC IPC(8): C02F1/66C02F1/00E21B21/06C02F103/10
CPCC02F1/00C02F1/66C02F2103/10E21B21/062
Inventor 王莉霞
Owner 北京嘉禾天华节能环保科技有限公司
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