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Method for constructing oil drilling waste mud solidification pool

A waste mud and oil drilling technology, which is applied in the direction of buildings, building types, underwater structures, etc., can solve the problems that the pool does not play an anti-seepage role, pollutes the surrounding environment, waste mud overflows, etc., and achieves long-term protection without leakage , low curing cost, and shortened construction period

Active Publication Date: 2011-02-23
CHINA NAT PETROLEUM CORP CHUANQING DRILLING ENG CO LTD +1
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Newly build a stone or brick pond to hold the excess solidified material, build the pond and carry out anti-seepage treatment, but this method takes a long time, usually three months, and in the event of heavy rain during the process, it is easy to cause the waste mud to overflow and cause Pollution of the surrounding environment; after the construction of the landfill pool, 1.5mm high-density polyethylene geomembrane is used for anti-seepage treatment, but during the construction process, debris or construction machinery at the bottom of the pool can easily pierce the polyethylene geomembrane, thereby Cause leakage, so that the constructed pool does not have the proper anti-seepage effect
[0007] Some people also use the method of digging holes on the spot and burying them after solidification, which is very convenient and fast, but it usually takes a month for the solidification body to form and stabilize, and it is easy to form leakage before solidification, polluting groundwater
If the mud is transferred to other places for curing, the cost of curing will increase, and it is easy to cause pollution during the transfer process

Method used

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  • Method for constructing oil drilling waste mud solidification pool
  • Method for constructing oil drilling waste mud solidification pool

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The invention discloses a method for constructing an oil drilling waste mud solidification pool, which comprises the following steps: a. Excavating an earthen pool and compacting the pool body; b. Removing sharp debris on the inner wall of the earthen pool, and laying a clay layer on the bottom of the earthen pool 1, the clay layer 1 is compacted; c, the bottom layer of non-woven geotextile 2, the polyethylene geomembrane 3 and the surface layer of non-woven geotextile 4 are sequentially laid on the inner wall of the earthen pond to form a three-layer structure, and the surface of the non-woven geotextile is Fill the waste mud 5 in the layer 4, and use the three-layer structure to wrap the waste mud 5; d, lay a concrete layer 7 on the three-layer structure wrapped with the waste mud 5; e, cover the concrete layer 7 with a Layer cooked soil 8.

Embodiment 2

[0039] As the best implementation mode of the present invention is as follows: with reference to figure 1 , the present invention includes: a, excavating the earthen pond, and tamping the pond body; b, removing the sharp debris on the inner wall of the earthen pond, and laying a clay layer 1 at the bottom of the earthen pond, and compacting the clay layer 1; c, on the inner wall of the earthen pond Lay non-woven geotextile bottom layer 2, polyethylene geomembrane 3 and non-woven geotextile surface layer 4 in sequence to form a three-layer structure, fill waste mud 5 into the non-woven geotextile surface layer 4, and use the three-layer The structure wraps the waste mud 5; d, laying a concrete layer 7 on the three-layer structure wrapped with the waste mud 5; e, covering a layer of mellow soil 8 on the concrete layer 7. After any of the steps a-e, a drainage ditch 6 is dug outside the pool, and the concrete layer 7 is extended to the drainage ditch 6 . In the concrete layer 7,...

Embodiment approach

[0042] (1) Excavate the solidification pool according to the terrain, try to be within 50m of the sewage pool, the depth of the pool is 2.5-3m, the length and width are not more than 20m, and the slope of the slope is 45°-60°.

[0043] (2) Compact the bottom and sides of the pool, remove sharp debris, and use 20cm of clay at the bottom and compact it.

[0044] (3) High-density polyethylene geomembrane 3 (1.5mm) uses upper and lower layers of non-woven geotextiles as the protective layer. Before laying the geomembrane, lay the geotextile, and then lay a layer of geotextile. The geotextile joints are lapped. The amount of contact is between 20-30cm.

[0045] (4) Lay high-density polyethylene geomembrane 3 and the welding sequence extends from the height of the pool to the lower part. The overlap between the two membranes is between 10-20cm. The joint must be clean and free of water drops, so as not to affect the welding quality. The welding adopts hot-press fusion welding, and ...

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Abstract

The invention provides a method for constructing an oil drilling waste mud solidification pool and relates to the technical field of oil and gas exploration drilling pollution control. A scheme of the method comprises the following steps of: excavating the solidification pool on site, wherein the slope of a pool wall is 45 to 60 DEG, and the pool height is 2.0 to 2.5 m; performing seepage control on a pool bottom by adopting clay-(non-woven geotextile)-(high-density polyethylene geomembrane)-(non-woven geotextile); continuously packaging solid waste to a top part by using the clay-(non-woven geotextile)-(high-density polyethylene geomembrane)-(non-woven geotextile); and capping the top part by using C20 concrete so as to prevent a solidified body from seeping. The process is simple and easy, the cost investment is small, the construction period is short, and the drilling waste mud is propelled to be solidified rapidly and timely so as to effectively prevent the waste mud from overflowing and polluting the environment in the drilling operation process.

Description

technical field [0001] The invention relates to the technical field of oil and gas exploration and drilling pollution control, in particular to the construction and anti-seepage process of waste mud landfill pools for oil and gas exploration and drilling, and can be applied to landfill treatment of waste mud produced in oil and gas drilling operations after solidification. Background technique [0002] The oil and gas exploration and drilling process will produce a large amount of waste drilling mud, and the chemical additives in the mud cause COD Cr , petroleum, chroma and other pollution indicators are high. [0003] In order not to pollute the environment around the drilling production, the waste mud generated during the drilling process is generally stored in the sewage tank, and after the completion of the well, the mud is solidified and landfilled on site for disposal. However, during the drilling operation, due to the complexity and uncertainty of the formation condi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04H7/18E02D29/16E02D29/045
Inventor 蒋学彬陈立荣宋远贵黄敏李盛林李辉罗刚
Owner CHINA NAT PETROLEUM CORP CHUANQING DRILLING ENG CO LTD
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