GB/T 41518-2022 in English
VALIDEvaluation method and control index of oil-based cuttings in shale gas exploration and development
- Issued on:2022-04-15
- Implemented on:2022-11-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
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《GB/T 41518-2022页岩气勘探开发油基岩屑处理方法及控制指标》由TC244（全国天然气标准化技术委员会）归口，主管部门为国家标准化管理委员会。
Introduction
Analysis of the core content of the standard
This standard systematically constructs a full life cycle management system for oil-based cuttings in shale gas development for the first time, with a focus on standardizing:
- Full process control: covering the five major links of collection→transportation→storage→processing→resource utilization
- Key technical indicators: the rigid requirement that the solid phase oil content after treatment is less than 2%
- Dual technical paths: standardized operating specifications for thermal desorption and solvent extraction processes
Comparison of key technologies
| Dimensions | Thermal desorption technology | Solvent extraction technology |
|---|---|---|
| Process flow | Pretreatment→Thermal desorption→Condensation separation→Non-condensable gas treatment | Solid-liquid separation→Extraction→Solvent recovery |
| Oil recovery rate | ≥90% | 85-92% |
| Applicable scenarios | Large-scale centralized processing | Cuttings containing special oil components |
Implementation points
Application case of Fuling shale gas field
When using thermal desorption device to treat oil-based cuttings:
- Magnetic separation equipment is required to remove metal impurities in the pretreatment stage
- The pyrolysis temperature is controlled in the range of 450-550℃
- The thermal efficiency of non-condensable gas is increased by 30% after RTO incineration
Environmental management specifications
The standard innovatively proposes a three-level monitoring system:
- Soil monitoring: test the petroleum hydrocarbon content every quarter according to HJ/T166
- Atmospheric monitoring: install VOCs online monitoring devices in the processing workshop
- Solid phase detection: oil content detection for each batch of products
Standard evolution analysis
Compared with the 2017 industry trial standard, this version has the following major breakthroughs:
- Added solvent extraction technology route
- Clearly resource utilization methods (brick/concrete, etc.)
- Strengthen the digital traceability requirements for the entire process (records are kept for 10 years)
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