Processing agent for harmlessly curing waste sludge in petroleum drilling well and application method thereof

A technology for solidification treatment and waste mud, applied in the direction of fixed/solidified sludge treatment, sludge treatment, chemical instruments and methods, etc., can solve the problem of difficult control of harmful substances and achieve the effect of excellent economic benefits

Active Publication Date: 2017-05-31
北京联众华禹环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, waste mud often contains a small amount of heavy metal ions and oily substances, which makes it difficult for traditional curing agents to control various harmful substances in waste mud within the scope of relevant national emission requirements.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Application site: a well site of Zhongyuan Drilling Team in Huabei Oilfield;

[0020] Source of mud: 50m of waste mud produced by drilling solid control equipment vibrating screen, desilter and desander and centrifuge 3 , mud specific gravity 1.8t / m 3 ;

[0021] Mud properties: Drilling mud is clear water drilling, which mainly contains weighted materials, useless solid phase, organic polymer substances, etc., and also contains a small amount of oil. After the mud is dried, the detection index of the leachate is pH9.1, and the COD is 460mg / l.

[0022] Treatment process: Referring to the properties of the waste mud, in terms of mass percentage, prepare a solidification treatment agent according to cement: 30%, aluminum sulfate: 30%, bentonite: 24%, calcium sulfate: 12%, phosphorus pentoxide: 4%, Stir and mix each component uniformly at room temperature according to the above mass percentage. Subsequently, 8% solidification treatment agent was added to each ton of wast...

Embodiment 2

[0026] A harmless solidification treatment agent for oil drilling waste mud, which consists of the following components in terms of mass percentage: cement: 30%, aluminum sulfate: 60%, polyaluminum chloride: 10%. The solidification treatment agent was added to the waste mud to be treated in an amount of 5% per cubic meter of waste mud, and the treatment process was as in Example 1, which will not be repeated here.

Embodiment 3

[0028] A harmless solidification treatment agent for oil drilling waste mud, which consists of the following components in terms of mass percentage: cement: 20%, aluminum sulfate: 30%, polyaluminum chloride: 5%, bentonite: 10%, sulfuric acid Calcium: 27%, phosphorus pentoxide: 8%. The solidification treatment agent was added to the waste mud to be treated in an amount of 15% per cubic meter of waste mud, and the treatment process was as in Example 1, which will not be repeated here.

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PUM

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Abstract

The invention discloses a processing agent for harmlessly curing waste sludge in a petroleum drilling well. The processing agent is composed of the following components in percentage by weight: 20 to 60% of cement, 20 to 60% of aluminum sulfate, 0 to 50% of poly(aluminum chloride), 0 to 60% of bentonite, 0 to 30% of calcium sulfate, and 0 to 10% of phosphorus pentoxide, wherein the total percentage by weight is 100%. The invention also discloses an application method of the curing processing agent. For each cubic meter of waste sludge, the added curing processing agent accounts for 5 to 20% of the volume of the sludge. The formula and addition amount of the curing processing agent can be adjusted according to different characteristics of waste sludge to realize optimal economic benefits. The pH of the leachate of waste sludge processed by the curing processing agent is in a range of 6 to 9, the COD is less than 100 mg/L, other indexes all meet the standards of national integrated wastewater discharge standard (GB8978-1996), and the cured waste sludge can be used to road pavement, land filling, construction of wells, and the like.

Description

technical field [0001] The invention relates to a treatment medicament, in particular to a harmless treatment medicament for waste oil drilling mud and a use method thereof, belonging to the field of environmental protection. Background technique [0002] Drilling mud, also known as drilling fluid, plays a very important role in oil field drilling operations. It has the functions of cleaning boreholes, balancing formation pressure, and cooling drill bits. A large amount of waste mud will be produced during the drilling process, the main source of which is the waste mud produced by changing the mud system due to changes in geological properties; it is the mud discarded at the well site after drilling and completion, including the mud returned during well completion mud; the third is the waste mud generated by the mud solid control system during the drilling process. In general, the main components of drilling mud include water, oil, clay, weighting materials, mud curing agen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/00
CPCC02F11/008
Inventor 于勇勇杨凯刘征姚佐国刘小见
Owner 北京联众华禹环保科技有限公司
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