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| 深、浅层页岩气区块油基岩屑污染特征研究 |
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于劲磊1,2,向启贵1,2,蒋国斌1,2,蒙恬1,2,江华杉1,2,王红娟1,2
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1.中国石油西南油气田公司安全环保与技术监督研究院 ;2.页岩气评价与开采四川省重点实验室
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| 摘要: |
| 深、浅层页岩气由于地区、井深、油基钻井液体系的不同,产生的油基岩屑特性也可能存在差异。为此,采集了川渝地区5个深、浅层页岩气油基岩屑样品,分析了深、浅层页岩气预处理前后油基岩屑及脱油残渣中重金属、多环芳烃(PAHs)和石油烃的污染特性。结果 表明:在预处理前后,油基岩屑中的石油烃含量均超过GB 5085.6-2007《危险废物鉴别标准 毒性物质含量鉴别》限值要求；重金属、PAHs含量较低,均未超过GB 36600-2018《土壤环境质量 建设用地土壤污染风险管控标准(试行)》中第二类用地的筛选值限值；热脱附处理后脱油残渣中的石油烃、重金属、PAHs含量均低于GB 5085.6-2007。 |
| 关键词: 深层页岩气 浅层页岩气 油基岩屑 脱油残渣 重金属 石油烃 PAHs |
| DOI：10.3969/j.issn.1007-3426.2021.04.021 |
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| 基金项目:中国石油天然气股份有限公司科学研究与技术开发项目“深层页岩气有效开采关键技术攻关与试验”(2019F-31) |
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| Research on pollution characteristics of oil-base cuttings from deep and shallow shale gas development |
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Yu Jinlei1,2, Xiang Qigui1,2, Jiang Guobin1,2, Meng Tian1,2, Jiang Huashan1,2, Wang Hongjuan1,2
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1. HSE and Technical Supervision Research Institute Of Southwest Oil & Gasfield Company, PetroChina, Chengdu, Sichuan, China;2. Key Laboratory of Shale Gas Evaluation and Exploitation of Sichuan Province, Chengdu, Sichuan, China
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| Abstract: |
| The characteristics of oil-based cuttings from the drilling of deep and shallow shale gas wells may be different, originating from the regional differences and oil-based drilling fluid systems applied. In this study, five samples of oil-based cuttings from deep and shallow shale gas in Sichuan and Chongqing were collected. The pollution characteristics of the oil-based drilling cuttings and the associated pyrolysis residues from deep and shallow shale gas development were analyzed, mainly the contents of heavy metals, polycyclic aromatic hydrocarbons (PAHs) and petroleum hydrocarbons. The results showed that the petroleum hydrocarbon contents of oil-based cuttings and pyrolysis residues after pretreatment exceeded the limit requirements of GB 5085.6-2007 Identification Standards for Hazardous Wastes-Identification for Toxic Substance Content. Besides, the contents of heavy metals and PAHs were low, and none of them exceeded the risk screening values for the type Ⅱ land in GB 36600-2018 Risk Control Standard for Soil Contamination of Development Land. The contents of petroleum hydrocarbons, heavy metals, and PAHs in the pyrolysis residues after thermal desorption treatment were also lower than the standard limits of GB 5085.6-2007. |
| Key words: deep shale gas shallow shale gas oil-based cuttings deoiling residue heavy metal petroleum hydrocarbons PAHs |
