页岩气钻屑固化填埋池监测与评价研究
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摘要
为了探讨钻屑固化填埋池对周围土壤及水体环境的影响,以西南某页岩气田为例,分别选取了具有代表性的水基钻屑固化填埋池和油基灰渣固化填埋池,先对钻屑固化处置方式和效果进行了评价,再对钻屑固化填埋池土壤径流液及土壤进行了监测,分析了固化填埋池对周边土壤环境的影响。结果表明:钻屑固化体浸出液达到GB8978-1996《污水综合排放标准》一级排放标准,钻屑固化填埋池土壤径流液满足GB5084-2005《农田灌溉水质标准》旱作标准;水基钻屑固化填埋池和油基灰渣固化填埋池上覆土壤重金属综合污染指数分别是0.42、0.45,周边土壤重金属综合污染指数分别是0.45、0.54。钻屑固化填埋池各项监测指标均未超标,土壤重金属综合污染指数均小于0.7,钻屑固化填埋暂时未对周边土壤造成影响,属于清洁水平。短期内钻屑固化填埋效果较好,对周围土壤环境影响较小。
In order to explore the impact of drilling solidification landfill on surrounding soil and water environment,taking a platform of shale gas field in the southwest as an example,representative water-based drilling solidification and oil-based ash solidification landfills were respectively selected. In the first place,the treatment way and effect of drilling was evaluated,the runoff liquid and soil of the drilling solidification were monitored,and then the study analyzed the influence of drilling solidification on surrounding soil environment. The results showed that the lixivium could meet the limit level for the first grade of standard GB8978-1996. The soil runoff liquid could meet the limit level for the dry farming grade of standard GB5084-2005. The comprehensive pollution index of the overlying soil heavy metals for the water-based drilling solidification and oil-based ash solidification landfills were respectively 0. 42 and 0. 45. The comprehensive pollution indexes of surrounding soil heavy metals were respectively 0. 45 and 0. 54. All monitoring indexes of drilling solidification landfill can meet the requirements of relevant national standards,and the comprehensive pollution index of soil heavy metals were below 0. 7. It indicated that the drilling solidification has not affected the surrounding soil for now,which is a clean level. In the short term,the drilling solidification treatment has good effect,and it has little influence on surrounding soil environment.
In order to explore the impact of drilling solidification landfill on surrounding soil and water environment,taking a platform of shale gas field in the southwest as an example,representative water-based drilling solidification and oil-based ash solidification landfills were respectively selected. In the first place,the treatment way and effect of drilling was evaluated,the runoff liquid and soil of the drilling solidification were monitored,and then the study analyzed the influence of drilling solidification on surrounding soil environment. The results showed that the lixivium could meet the limit level for the first grade of standard GB8978-1996. The soil runoff liquid could meet the limit level for the dry farming grade of standard GB5084-2005. The comprehensive pollution index of the overlying soil heavy metals for the water-based drilling solidification and oil-based ash solidification landfills were respectively 0. 42 and 0. 45. The comprehensive pollution indexes of surrounding soil heavy metals were respectively 0. 45 and 0. 54. All monitoring indexes of drilling solidification landfill can meet the requirements of relevant national standards,and the comprehensive pollution index of soil heavy metals were below 0. 7. It indicated that the drilling solidification has not affected the surrounding soil for now,which is a clean level. In the short term,the drilling solidification treatment has good effect,and it has little influence on surrounding soil environment.
引文
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[10]张春,金吉中,张思兰,等.水基钻屑固化填埋对周边土壤环境的影响[J].油气田环境保护,2017,27(2):40-42.
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[2]林孟雄,李颖,伍丹丹,等.油气田钻井废弃泥浆土地法处理沥滤液扩散的环境分析[J].内蒙古石油化工,2006,32(6):104-106.
[3]陈晨.钻井泥浆固化处置对地表水环境的影响分析[D].成都:西南交通大学硕士研究生论文,2013,6-7.
[4]桑玉全,马晓蕾,赵凯.钻井废弃泥浆对周围土壤环境的影响研究[C].中国环境科学学会学术年会优秀论文集(上卷),2007,1075-1081.
[5]乔川,欧阳峰,刘了,等.钻井泥浆固化处置对土壤环境的影响[J].油气田环境保护,2013,23(5):41-43.
[6]崔永峰,李钟玮.废弃钻井泥浆无害化处理与评价方法的研究[J].北方环境,2013,12(2):77-78.
[7]霍小鹏,唐春凌,罗小兰,等.泥浆池周边土壤重金属分布及潜在生态危害[J].油气田环境保护,2016,26(2):41-43.
[8]朱昌宇,黄道友,朱奇宏,等.模拟降雨条件下污染土壤中重金属元素径流迁移特征[J].水土保持学报,2012,26(4):49-53.
[9]师荣光,蔡彦明,郑向群,等.天津郊区农田降雨径流重金属的污染特征及来源分析[J].干旱区资源与环境,2011,25(5):213-217.
[10]张春,金吉中,张思兰,等.水基钻屑固化填埋对周边土壤环境的影响[J].油气田环境保护,2017,27(2):40-42.
[11]蒋学彬,荆晨,黄敏,等.油气田钻屑与废泥浆固化处理技术的初步研究[J].新疆环境保护,2009,31(1):22-24.