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Resourceful treatment method for oil and gas field well drilling oily cuttings

A processing method and recycling technology, which is applied in the field of resource processing of oily drill cuttings in oil and gas fields, can solve the problems of high cost, complicated process, unbearable operating cost, etc., and achieve the effect of low processing cost and simple process

Inactive Publication Date: 2017-11-17
NEIJIANG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method not only cannot effectively deal with oil sludge, but also causes a lot of pollution to the soil of the well site and its surrounding farmland
[0007] Waste oil-based drilling fluid treatment methods such as heat treatment and distillation are complicated in process and high in cost, and the operating cost is unaffordable for general oilfield enterprises

Method used

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  • Resourceful treatment method for oil and gas field well drilling oily cuttings
  • Resourceful treatment method for oil and gas field well drilling oily cuttings

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Weigh 100g of oily drilling cuttings from oil and gas fields, put them into 300mL of industrial alcohol, and stir at a temperature of 45°C and a stirring speed of 400r / min for 30min to obtain suspension 1, and after standing for 30min, obtain suspension 2 and alcohol solution 1, suspension 2 After filtration, the primary drilling cuttings and alcohol solution 2 are obtained; the alcohol solution 1 and the alcohol solution 2 are transferred to the liquid storage tank and rectified and separated at a temperature of 85°C to obtain recovered pharmaceuticals and alcohol, and the alcohol is recycled; the primary drilling cuttings are mixed with 300mL tap water Stir and mix with 20mL industrial alcohol at 85°C to obtain a suspension 3, which is filtered to obtain sediment and washing water, and the washing water interacts with the adsorbent MgO to obtain a suspension 4, which is subjected to sedimentation treatment The supernatant water and MgO adsorption waste are obtained, th...

Embodiment 2

[0027] Weigh 120g of drilling cuttings from oil and gas fields and put them into 350mL of industrial alcohol. Stir at a temperature of 30°C and a stirring speed of 500r / min for 35 minutes to obtain suspension 1. After standing for 40 minutes, suspension 2 and alcohol solution 1 are obtained. Suspension 2 is obtained by filtration. Primary drilling cuttings and alcohol solution 2; alcohol solutions 1 and 2 are transferred to the liquid storage tank and rectified and separated at a temperature of 85°C to obtain recovered chemicals and alcohol, and the alcohol is recycled; primary drilling cuttings are mixed with 350mL tap water and 25mL industrial alcohol at 90 After stirring and mixing at ℃, the suspension 3 is obtained. The suspension 3 is filtered to obtain sediment and washing water. The washing water interacts with the adsorbent activated carbon to obtain the suspension 4. The suspension 4 is settled to obtain supernatant water and silica gel adsorption. Waste materials and ...

Embodiment 3

[0029] Weigh 110g of oil and gas field drilling cuttings and put them into 260mL of industrial alcohol at a temperature of 25°C and a stirring speed of 600r / min for 40 minutes to obtain a suspension 1. After standing for 50 minutes, a suspension 2 and an alcohol solution 1 are obtained. The suspension 2 is obtained by filtration. Primary drilling cuttings and alcohol solution 2; alcohol solutions 1 and 2 are transferred to the liquid storage tank and rectified and separated at a temperature of 80°C to obtain recovered chemicals and alcohol, and the alcohol is recycled; primary drilling cuttings are mixed with 250mL tap water and 15mL industrial alcohol at 80 After stirring and mixing at ℃, the suspension 3 is obtained. The suspension 3 is filtered to obtain sediment and washing water. The washing water interacts with the adsorbent molecular sieve to obtain the suspension 4. The suspension 4 is settled to obtain supernatant water and molecular sieve adsorption. The waste and sup...

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Abstract

The invention discloses a resourceful treatment method for oil and gas field well drilling oily cuttings. The method comprises the following steps that 1, oily cuttings and industrial ethyl alcohol are stirred and mixed proportionally under a certain temperature to obtain a suspension 1; 2, the suspension 1 is subjected to standing under the normal temperature to obtain a suspension 2 and an alcoholic solution 1, and the suspension 2 is filtered and treated to obtain primary drilling cuttings and an alcoholic solution 2; 3, the alcoholic solution 1 and the alcoholic solution 2 are transferred into a reservoir and subjected to rectification separation treatment, a recycling medicament and ethyl alcohol are obtained, and the ethyl alcohol is recycled; 4, the primary drilling cuttings, tap water and industrial alcohol are stirred and mixed proportionally in a stirring tank to obtain a suspension 3, and the suspension 3 is filtered to obtain sediment, washing water and the like. According to the method, innocent treatment of the oil and gas field oily cuttings is achieved, damage to ecological environment is reduced, a drilling fluid lubricating agent is recycled, harmless stacking or utilization of rock waste is achieved, process water and adsorption materials are recycled, the processing technology is simple, the cost is low, and no industrial wastewater or waste gas or residues are discharged.

Description

technical field [0001] The invention belongs to the field of environmental treatment of hazardous wastes, and in particular relates to a resource treatment method for oily drilling cuttings in oil and gas fields. Background technique [0002] Waste mud is one of the major sources of pollution in the oil and gas industry. It is a multiple stable colloidal suspension system containing clay, weighted materials, various chemical treatment agents, sewage, dirty oil and drilling cuttings. The main components harmful to the environment are hydrocarbons, salts, various polymers, wood Sulfonate, certain metal ions (mercury, copper, arsenic, chromium, zinc, and lead) and impurities in barite. In order to prevent the waste drilling mud from polluting the environment, it must be treated. At the same time, oily waste is also classified as HW08 hazardous waste in the national "Hazardous Waste List". According to environmental protection requirements, waste oil-based mud and oil-based m...

Claims

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Application Information

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IPC IPC(8): C02F9/08C02F103/10
CPCC02F1/001C02F1/28C02F1/281C02F1/52C02F1/68C02F9/00C02F2103/10C02F2301/046C02F2301/08C02F2303/16C02F2303/18
Inventor 郑小刚黄明张金洋刘勇付孝锦刘敏
Owner NEIJIANG NORMAL UNIV
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