Water-based drilling soft solid waste recycling treatment and utilization technology

Abstract

The invention discloses a water-based drilling soft solid waste recycling treatment and utilization technology. The water-based drilling soft solid waste recycling treatment and utilization technologycomprises the steps that drilling soft solid waste is mixed evenly, a microorganism strain with a decomposing effect is inoculated at the proportion of 0.5%-1% by weight, and even mixing is carried out; then, a microorganism nutrient of 0.5%-2% of the solid waste by weight is added and mixed evenly, and the mixture is evenly mixed with soil with the water content of 15%-20%, wherein the mixing proportion of the solid waste and the soil is 1:(0.5-3) by weight; and the treated mixture is stacked, plants are planted or grass seeds are cast in the mixture, and a microorganism-soil-plant united system is used for decomposing treatment of organic pollutants in the drilling soft solid waste. By means of the water-based drilling soft solid waste recycling treatment and utilization technology, COD, Oil and other substances in the drilling work soft solid waste can be effectively decomposed and removed, part of the organic pollutants are decomposed into simple inorganic substances, and part ofthe organic pollutants are decomposed into humus, so that pollutants in the solid waste are removed, and the purposes of harmlessness and recycling utilization of the solid waste are achieved.

Description

technical field [0001] The invention relates to a classification, disposal and utilization process of oil and gas exploration and drilling water-based solid waste, and belongs to the technical field of oil and gas exploration and drilling pollution control. Background technique [0002] Drilling solid waste is an inevitable product of oil and gas exploration and drilling operations, and has certain environmental hazards. The amount produced in Sichuan and Chongqing is generally 0.35-0.4m 3 / m footage. Drilling solid waste is divided into hard and soft solid waste according to the nature of the source. The hard solid waste is mainly the drilling cuttings removed by the vibrating screen and the sand and mud removed by the sand and mud remover. This part of the solid waste has a low pollutant content. , is a small amount of mud adhered to drilling cuttings, which is mainly underground rock with a certain strength and particle size; soft solid waste is mainly clay mud tanks and...

AI Technical Summary

Problems solved by technology

Drilling solid waste is divided into hard and soft solid waste according to the nature of the source. The hard solid waste is mainly the drilling cuttings removed by the vibrating screen and the sand and mud removed by the sand and mud remover. This part of the solid waste has a low pollutant content. , is a small amount of mud adhered to drilling cuttings, which is mainly underground rock with a certain strength and particle size; soft solid waste is mainly clay mud tanks and square shaft mud, waste mud, and mud generated from drilling wastewater treatment. Part of the solid waste has no strength, the particle size of the solid is very small, and the solid waste has a high content of organic and other pollutants. Especially when drilling with various sulfonated mud systems, it is not suitable as a raw material for making bricks and cement blocks. At the same time, it is easy to Bring greater risk of environmental pollution

[0003] At present, solid waste from conventional water-based drilling in Sichuan and Chongqing is mixed together and sent to local brick factories for brick-making disposal or solidification landfill. Different types of solid waste are not collected, disposed and utilized in different ways. Not only is the final disposal volume large, but it is also transported The disposal cost is high, and the risk of safety and environmental protection during transportation is relatively high. At the same time, due to the limited solid waste receiving capacity of the surrounding brick factories, the transshipment and disposal of solid waste are affected, and in the future, it is easy to be controlled by local enterprises and raise the disposal price. The solid wastes from different drilling sources are collected and reused differently, which is economical and environmentally friendly, and complies with the national energy conservation and emission reduction policies