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Solidification treatment method and resource application of natural gas drilling cuttings

A technology for drilling cuttings and solidification treatment, applied in fixed/solidified sludge treatment, chemical instruments and methods, sludge treatment, etc. Low cost and the effect of solving pollution problems

Inactive Publication Date: 2020-08-11
CHINESE RES ACAD OF ENVIRONMENTAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The open-air storage or landfill of solid waste not only occupies a large amount of land, but also has the risk of infiltration of toxic and harmful components into the soil, resulting in soil compaction (mainly due to the impact of salt, alkali and rock salt strata), which has a great impact on The growth of plants is unfavorable, or even unable to grow, so that the soil cannot be returned to plowing, and it also destroys the living conditions of microorganisms in the soil, affecting the growth and development of animals and plants

Method used

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  • Solidification treatment method and resource application of natural gas drilling cuttings
  • Solidification treatment method and resource application of natural gas drilling cuttings
  • Solidification treatment method and resource application of natural gas drilling cuttings

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Experimental program
Comparison scheme
Effect test

Embodiment 1～ Embodiment 8

[0042] Embodiments 1 to 8 solidify the drilling cuttings according to the following steps:

[0043] (1) Pretreatment: sieve drilling cuttings to obtain cuttings samples with a particle size not greater than 5mm;

[0044] (2) Adjust the water content: use water to adjust the water content of the cuttings sample to 40% ± 2%

[0045] (3) solidification treatment: add cement, lime, fly ash and activated carbon to the rock chip sample of step (2) gained, mix and stir evenly, obtain solidified rock chip soil;

[0046] (4) Compression molding: the solidified rock debris soil is packed into a custom-made mold, and compacted under a strength of 102MPa;

[0047] (5) Curing: seal the formed module in a plastic airtight bag and place it in room temperature for curing. The curing time is 7 days.

[0048] Wherein, in step (3), the mass percentages of cement, lime, fly ash and activated carbon in the total amount of the obtained solidified rock debris soil mixture are shown in Table 1.

...

Embodiment 9～ Embodiment 16

[0056] Embodiments 9-16 also solidified the drilling cuttings according to the steps of Embodiments 1-8. The difference is that after the optimal ratio of cement and lime added in Examples 1 to 8 is 5%, in the step (3) of Examples 9 to 16, cement, lime, fly ash and activated carbon each account for the resulting The mass percentage of the total amount of solidified rock debris-soil mixture is shown in Table 2.

[0057] Before solidification, the drilling cuttings were leached according to the GB5086.1-1997 method, and the COD value was detected according to the relevant detection method. The measured COD value of the drilling cuttings was 212mg / L.

[0058] After the above processing steps are completed, the cured solidified rock debris soil module is leached according to the GB5086.1-1997 method, and the COD concentration and pH are detected according to the relevant detection methods, and the solidification time is used to compare the various examples. The results are shown i...

Embodiment 17

[0063] This embodiment is used to illustrate a preferred specific implementation manner.

[0064] A method for solidifying natural gas drilling cuttings, comprising the steps of:

[0065] (1) Pretreatment: sieve drilling cuttings to obtain cuttings samples with a particle size not greater than 5mm;

[0066] (2) Regulate the water content: use water to adjust the water content of the cuttings sample to 40% ± 2%;

[0067] (3) solidification treatment: add cement, lime, fly ash and activated carbon to the rock chip sample of step (2) gained, mix and stir evenly, obtain solidified rock chip soil;

[0068] Among them, the mass dosage parts of cuttings samples, cement, lime, fly ash and activated carbon are respectively: 39.5 parts of cuttings samples, 5 parts of cement, 5 parts of lime, 50 parts of fly ash, and 0.5 parts of activated carbon;

[0069] (4) Compression molding: the solidified rock debris soil is packed into a custom-made mold, and compacted under a strength of 102MP...

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Abstract

The invention relates to harmless and resourceful treatment of natural gas exploitation drilling cuttings, and particularly discloses a solidification treatment method and resourceful application of natural gas exploitation drilling cuttings. According to the method, drilling cuttings are used as a raw material, cement, lime, coal ash and activated carbon in a proper proportion are added to obtainsolidified rock debris soil, the solidified rock debris soil is compacted and formed under certain strength, a solidified substance with the environmental protection indexes reaching the standard isobtained after maintenance, and the performance indexes such as the plastic limit, the liquid limit, the plastic limit index, the organic matter content, the CBR and the ignition loss of the solidified substance all show that the solidified substance can be used as building foundation soil. According to the method, the drilling cuttings and the coal ash are recycled, and good social benefits and economic benefits are brought.

Description

technical field [0001] The invention relates to the harmless and resourceful treatment of natural gas drilling drilling cuttings, in particular to a solidification treatment method and resource application of natural gas drilling cuttings. Background technique [0002] In order to speed up the optimization of the energy structure, we must first vigorously promote the development of the natural gas industry. From 2013 to 2018, the production of natural gas has increased significantly. It is estimated that by 2030, the proportion of natural gas in primary energy will increase from 10% in 2020 to 15%. %. At the same time, with the exploitation of natural gas, a large amount of drilling cuttings are produced in the process of drilling and fracturing, which poses a greater risk to the safety of the ecological environment around the gas field. There are tens of thousands of wells exploited in my country's gas fields every year. According to calculations and statistics, wells with...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/10C04B40/02C02F11/00C02F103/10
CPCC02F11/00C02F11/008C02F2103/10C04B28/10C04B40/0259C04B2111/00017C04B2111/0075C04B14/02C04B7/00C04B14/022C04B18/08
Inventor 周长波韩桂梅方刚李子秀党春阁郭亚静林雨琛
Owner CHINESE RES ACAD OF ENVIRONMENTAL SCI