Classification treatment and utilization method for water-based solid waste of petroleum and natural gas exploration drilling

Abstract

The invention provides a classification treatment and utilization method for water-based solid waste of petroleum and natural gas exploration drilling. According to the method, for the situation thatthe geological structure is complicated and the well depth is 4,000 m or above, drilling solid waste of a polymer drilling fluid system and drilling solid waste of a sulfonated drilling fluid system are adopted in sequence. The classification treatment and utilization method comprises the steps that correspondingly generated drilling solid waste is classified and collected according to different drilling fluid systems used during drilling, wherein the drilling solid waste comprises clean water drilling solid waste, polymer drilling solid waste and sulfonated drilling solid waste. The treatmentand utilization method comprises the following steps that the clean water drilling solid waste is directly transferred to a stacking field and stacked to be used as a filler or a building material; biological treatment resource soil utilization is conducted on the polymer drilling solid waste in situ; and reduction and liquid exhaustion are conducted on the sulfonated drilling solid waste, and then the treated drilling solid waste is transferred to a brick making factory to serve as a brick making raw material. The classification treatment and utilization method has the beneficial effects that the water-based solid waste can be classified and collected and classified and treated and utilized, and the transfer and disposal cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of oil and gas exploration and drilling pollution control, and specifically relates to a method for classified treatment and utilization of oil and gas exploration and drilling water-based solid waste. Background technique [0002] Drilling solid waste is an inevitable product of oil and gas exploration and drilling operations, and the amount generated in Sichuan and Chongqing areas is generally 0.35 ~ 0.4m 3 / m footage. Due to the complex geological structure in the Sichuan-Chongqing region, the drilling wells are deep, and most of the wells are deep wells above 4,000 meters. The average well depth has reached about 4,500 meters, and the deepest well has exceeded 7,000 meters. Polymer drilling fluid system (polymer-free solid phase, polymer low solid phase and potassium polymer, etc.), gas drilling (partial wells) and sulfonated drilling fluid system (potassium polysulfonate and polysulfonate) drill comple...

AI Technical Summary

Problems solved by technology

At present, there is no classified collection and disposal of drilling solid waste in Sichuan and Chongqing regions. All kinds of drilling solid waste in the whole well are mixed and collected and mainly sent to the local brick factory for brick making. And it increases the safety and environmental risks in transshipment