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Microbial treatment process of waste mud from oil and gas drilling operations

A technology for oil and gas and microbial treatment, which is applied in the treatment of waste mud and contaminated soil, and in the field of microbial treatment of waste mud, which can solve the problems of increased risk of treatment time, slow microbial degradation, and high moisture content of the mixture to achieve enhanced degradation Pollution capacity, accelerated evaporation rate, and the effect of reducing water content

Active Publication Date: 2016-01-20
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in the actual application process of the above method, the mixture has a high water content, which is not conducive to the flow of oxygen. The middle of the pool is in an anaerobic state, and the microbial degradation rate is slow, and the treatment time is longer, which increases the risk.

Method used

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  • Microbial treatment process of waste mud from oil and gas drilling operations

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Embodiment 1

[0030] As a preferred embodiment of the present invention, it utilizes the original mud pool for storing waste water at the well site or builds a new storage pool near the well site. Lay horizontal pipes in parallel on the bottom of the pool, connect the vertical pipes to the horizontal pipes, lay stones on the horizontal pipes, lay non-woven fabrics on the stones, spread coarse sand on the non-woven fabrics, fill the waste mud mixture on the coarse sand, after filling, Laying natural soil, planting plants on the natural soil, the standpipe is higher than the surface of the natural soil.

Embodiment approach

[0032] As the best implementation mode of the present invention, its method is:

[0033] (1) Strain cultivation: The strains can isolate Halomonas and Bacillus strains that grow well in the soil polluted by waste mud, and after cultivation and domestication, they can be used as strains for treating waste mud.

[0034] (2) The soil added to the mud has a moisture content below 35%, and the volume ratio of soil to waste mud is 1.5:1 to 2:1; the volume ratio of bacteria to waste mud is 0.001 to 0.005:1; sawdust and waste mud are added The volume ratio is 0.5-1.5:1.

[0035] (3) Lay PVC or HDPE pipes with diameters of 10-20cm perforated (4×1.25cm aperture, interval 15-20cm) at the bottom of the pool. The horizontal pipes are laid in parallel with a spacing of 8-10m; the vertical pipes are connected to the horizontal pipes without perforation, and the spacing of the vertical pipes is 5-8m. The top of the vertical pipe is 10-20cm higher than the final covering soil.

[0036] (4) ...

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Abstract

The invention discloses a microbiological treatment technology for waste mud generated in drilling operation of petroleum and natural gas, and relates to the technical field of pollution treatment of exploration drilling for petroleum and natural gas. The technology is executed according to the following steps: a, preparing a pool for performing microbiological treatment on waste mud; b, paving the bottom of the pool with a plurality of transverse pipes, connecting the transverse pipes with vertical pipes, and perforating the transverse pipes; c, paving the bottom of the pool with cobblestones, and controlling the paving thickness of the cobblestones to be larger than the pipe diameter of the transverse pipes; d, paving with a non-woven fabric layer on the cobblestones; e, paving with sand on the non-woven fabric; f, paving with a prepared waste mud mixture on the sand; and g, paving with natural soil on the waste mud mixture, and planting plants. The technology helps to reduce the anaerobic area of a landfill pool, and is capable of finished degradation process in a relatively short time, enabling the mixture to reach national soil three-level standard and eliminating environment risk.

Description

technical field [0001] The invention relates to the technical field of oil and gas exploration and drilling pollution control, in particular to a method for microbial treatment of waste mud, which can be applied to waste mud treatment and contaminated soil treatment in oil and gas drilling operations. Background technique [0002] Oil and gas exploration and drilling process produces a large amount of waste drilling mud, the chemical additives in the mud contain a large amount of organic matter, and the oil pollution from running, dripping and leaking during the operation of the equipment causes COD Cr , petroleum, chroma and other pollution indicators are high, traditional harmless treatment methods usually add curing agents to fix and stabilize pollutants, reduce the diffusion speed of pollutants, the pollutants themselves are not removed, and a certain amount of pollution remains in the soil for a long time solidified body. Some patents use microorganisms, soil, and plan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F11/02
Inventor 蒋学彬陈立荣黄敏李盛林舒畅张敏何天鹏陈海涛金莉
Owner BC P INC CHINA NAT PETROLEUM CORP
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