Method for preparing artificial soil with shale gas water-based drilling cuttings and sludge fermentation products

Abstract

The invention belongs to the technical field of weakly-alkaline soil, and discloses a method for preparing artificial soil by using shale gas water-based drilling cuttings and a sludge fermentation product. The artificial soil is composed of the shale gas water-based drilling cuttings and the sludge fermentation product, wherein the mass ratio of the water-based drilling cuttings to the sludge fermentation product is 10:1. The method provided by the invention realizes the effect of changing the shale gas water-based drilling cuttings from waste into treasure; the sludge fermentation product isadded, so that the weakly-alkaline soil having good water-retaining air-permeable ability and sufficient nutrients is formed; and the weakly-alkaline soil has effects similar to those of general soilwhen being used as greening soil, and has great significance and value when being used as greening soil in mountainous areas where soil resources are scarce; the water-based drilling cuttings belongto shale gas drilling solid waste, and the method expands a resource utilization route of the shale gas drilling solid waste, and reduces an environmental risk; and the method can generate economic benefits and ecological benefits, and make a contribution for constructing green homeland.

Description

technical field [0001] The invention belongs to the technical field of weak alkaline soil, and in particular relates to a method for preparing artificial soil by using shale gas water-based drilling cuttings and sludge fermentation products. Background technique [0002] At present, the existing technologies commonly used in the industry are as follows: Water-based drilling cuttings is a solid waste of mixed formation cuttings and water-based drilling fluid produced during shale gas drilling. 3 ; Due to the adsorption of a small amount of water-based drilling fluid additives on the surface of water-based drilling cuttings, its composition is relatively complex and may contain a certain amount of pollutants such as heavy metals, salt, and petroleum hydrocarbons. Therefore, the safe and environmentally friendly disposal of water-based drilling cuttings has always been a shale focus of the gas industry. At present, the main disposal methods of water-based drilling cuttings ar...

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Problems solved by technology

[0003] In summary, the problems in the prior art are: The water-based drilling cuttings solidification landfill has the potential environmental risks of occupying land, and the leachate of the solidification body may seep out with long-term rainfall and pollute the surrounding soil and water bodies; however, the utilization of water-based drilling cuttings building materials has a limited consumption capacity, which cannot meet the requirements of shale gas. Development and post-drilling treatment progress; large-scale promotion and application of water-based drilling cuttings cannot be realized due to factors such as lack of a large amount of mellow soil

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