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Comprehensive utilization method of oil field drilling sludge

An oilfield drilling and sludge technology, applied in the direction of sludge treatment, drilling composition, chemical instruments and methods, etc., can solve the problems of resource consumption, high cost, secondary environmental pollution, etc.

Active Publication Date: 2015-04-29
韩京龙
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are certain problems with this treatment method: 1. Land acquisition is required, and each well needs to be equipped with 0.9 to 1 mu of land, which wastes precious land resources; 2. There is a risk of secondary environmental pollution; 3. With the improvement of environmental protection requirements, local Govt may ban in-situ solidification of drilling waste mud
This invention does not adopt different treatment methods for the different sludge oil content produced by different oil wells, which may cause unnecessary consumption of resources and correspondingly higher costs

Method used

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  • Comprehensive utilization method of oil field drilling sludge

Examples

Experimental program
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Effect test

Embodiment 1

[0035] Embodiment 1, the by-product of this oilfield is the mud that does not contain oil substantially, according to the following steps:

[0036] ⑴Use the electrode separation method to remove soluble cations from the mud; the size of the anode and cathode electrodes used is 1000cm in length and 500cm in width; the distance between the cathode and anode electrodes is 2000cm; the current is 1A; the voltage is 220V; the pole separation time is 10 days; the number of electrodes 10; the electrodes are arranged side by side.

[0037] (2) The mud treated in step (1) is aerobically fermented with local oil-degrading bacteria to remove organic pollutants. The specific steps are as follows:

[0038] a) Screening of local oil-degrading bacteria: put fresh rice in a paper box without a cover, the height is 2 / 3 of the height of the carton, and a wire mesh of the same size is placed in the upper part to prevent mice and other animals from eating it, and then spread on the wire mesh Gauz...

Embodiment 2

[0042] Embodiment 2, other are with embodiment 1, and difference is:

[0043] (4) Precipitating the mud treated in step (2), adding a curing agent to the sediment and then extruding to form a product 2; the product 2 is used as a building material and a municipal facility material.

Embodiment 3

[0044] Embodiment 3, the by-product of this oil field is low oily sludge, according to the following steps:

[0045] (5) Chlorine dioxide, hydrogen peroxide, permanganate, ozone or Fenton are added as oxidizing agents to low oily sludge, and the ratio of added parts by weight is low oily sludge: oxidizing agent = 2000:1, mixing and stirring, stirring time 10 hours to remove most of the oil and organic pollutants in low oily sludge;

[0046] (6) The sludge treated in step (5) is aerobically fermented by local oil-degrading bacteria to remove the remaining oil and organic pollutants; the specific steps are as follows:

[0047] a) Screening of local oil-degrading bacteria: put fresh boiled sweet potatoes in a wide-mouth plastic jar without a lid, the height is 2 / 3 of the height of the plastic jar, and a wire mesh of the same size is placed in the upper part to prevent rats and other animals from eating them. Cover the barbed wire with gauze to prevent soil particles from falling...

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Abstract

The invention relates to the technical field of resource development, in particular to a comprehensive utilization method of oil field drilling sludge. Sludge which does not contain oil is subjected to electrode separation, aerobic fermentation and granulation to form a product 1 or is subjected to extrusion forming to form a product 2; sludge which contains low content of oil is subjected to oxidation, aerobic fermentation and extrusion forming to form the product 2 or is subjected to granulation to form the product 1; sludge containing high content of oil is added with a moisture modifier, a combustion improver and a bulking and softening agent and is subjected to granulation forming and microwave drying, dried granules are screened, undersize materials are subjected to granulation forming again, and oversize materials form a product 3. Compared with the prior art, oil field drilling sludge, oily sludge and oil sludge and sand with different oil content are treated from the perspective of comprehensive utilization of resources, and the ultimate products can be effectively used as different resources.

Description

technical field [0001] The invention relates to the technical field of resource development, in particular to a method for comprehensive utilization of oilfield drilling sludge. Background technique [0002] A large amount of mud and oily sludge with high moisture content are produced during oilfield drilling. According to the oil content in oilfield sludge, it can be divided into oil-free sludge and oily sludge, and oily sludge is divided into low oily sludge and high oily sludge. The treatment of these sludges and oily sludge has become a very important issue in the oilfield industry. Difficult environmental issues. So far, the treatment of drilling mud is mainly to add a curing agent to the mud for curing and landfill. There are certain problems with this treatment method: 1. Land acquisition is required, and each well needs to be equipped with 0.9 to 1 mu of land, which wastes precious land resources; 2. There is a risk of secondary environmental pollution; 3. With the...

Claims

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Application Information

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IPC IPC(8): C02F11/00C10L5/48C09K17/40C09K8/03
CPCY02E50/30
Inventor 韩京龙
Owner 韩京龙
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