Development of an Environmentally Friendly Strongly Inhibitive Chloride-free Water Base Drilling Fluid
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摘要: 为减少油气资源勘探与开发过程中钻井液对周围环境的污染与生态系统的破坏,实现"绿色"钻井,并尽可能提高钻井液性能,笔者采用研制的包被剂、仿生固壁剂等与优选的处理剂进行复合,研发出了一套无氯盐环保型强抑制水基钻井液体系。室内研究结果表明,该体系在热稳定性、抗污染能力、抑制性能等方面表现优异,在120℃下连续热滚72h后钻井液性能稳定,可抗土粉污染达10%,抗钙侵0.8%,抗盐侵30%,页岩岩屑滚动回收率高达98.5%,抑制性评价结果优于PHPA/KCl体系。该体系能够满足常规环保评价指标,同时避免了使用氯盐,减轻对土壤结构、植物生长和地下水产生的负面影响。半数有效浓度EC50小于106 mg/L,易生物降解比值BOD5/CODCr为0.633,重金属含量远低于标准值,因此,无生物毒性,可降解,可排放。实验数据和评价结果均表明,该体系是一种既能满足钻井工程需求又能保护生态环境的新型水基钻井液体系,有较好的应用前景。Abstract: To minimize environmental pollution and damage to the ecosystem by drilling fluids used in the exploration and development of oil and gas, realize "green" drilling and maximize the performance of a drilling fluid, an encapsulator and a bionic borehole wall strengthening agent previously developed were compounded with other selected additives to formulate an environmentally friendly strongly inhibitive chloride-free water base drilling fluid. Laboratory experimental results show that this drilling fluid has superior temperature stability, resistance to contamination and inhibitive capacity. The drilling fluid had stable properties after continuously hot rolled for 72 h at 120℃. It was resistant to contamination by 10% clays, 0.8% calcium, or 30% salt. Percent shale recovery on hot rolling test was 98.5%. Laboratory evaluation shows that this drilling fluid has performance that is superior to that of PHPA/KCl drilling fluid. This drilling fluid can satisfy the needs of general environment protection and contains no chlorides, minimizing its negative effects on soil structure, plant growth and underground water system. EC50 of this drilling fluid is greater than 106 mg/L and BOD5/CODCr 0.633. The content of heavy metals is far lower than standard requirements, and is thus free of biotoxicity, biodegradable and dischargeable. Experimental data and evaluation results demonstrate that this drilling fluid is a novel mud that both satisfies the needs of drilling operation and protects the environment from being polluted, and has good application prospects.
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[1] 何念祖,孟赐福. 植物营养原理[M]. 上海:上海科学技术业出版社,1987:252-256. HE Nianzu,MENG Cifu.Principles of plant nutrition[M]. ShangHai:ShangHai Scientifc And Technical Publishers,1987:252-256. [2] DOW M,FLORENCE A S,BABU J V.Chloridefree inhibitive water-based fluid significantly improves environmental acceptability forrain forest locations[J]. SPE 156824-MS,2012. [3] MILLER W R,PESARAN P,HONARVAR S.The effects of drilling fluid mixtures on soils and plant[C]//Annual Meeting Papers, Division of Production.American Petroleum Institute,1976. [4] 李小刚,曹靖,李凤民. 盐化及钠质化对土壤物理性质的影响[J]. 土壤通报,2004,35(1):64-72.LI Xiaogang,CAO Jing,LI Fengmin.Effects of salinization and sodium quality on soil physical properties[J].Chinese Journal of Soil Science,2004,35(1):64-72. [5] ZHOU J,NASR EL DIN H A.A new application of potassium nitrate as an environmentally friendly clay stabilizer in water-based drilling fluids[J].SPE 184578-MS,2017. [6] 刘贵传,徐江,张国,等. 聚胺钻井液在塔河工区的应用研究[C]//全国钻井液完井液技术交流研讨会论文集. 北京:石林,罗平亚,2014:51-58. LIU Guichuan,XU Jiang,ZHANG Guo,et al. Application of polyamine drilling fluid in tahe area[C]//Papers Collection of National Symposium on Drilling Fluid and Completion Fluid Technology Exchange. Beijing:SHI Lin,LUO PingYa,2014:51-58. [7] YEW C H,CHENEVERT M E,WANG C L.Wellbore stress distribution produced by moisture adsorption[J]. SPE l9536,1990. [8] 鄢捷年. 钻井液工艺学[M]. 东营:中国石油大学出版社,2012:356-366. YAN Jienian.Technology of drilling fluid[M].Dongying:China University of Petroleum,2012:356-366. [9] 黄荣樽,陈勉,邓金根,等.泥页岩井壁稳定力学与化学的耦合研究[J].钻井液与完井液,1995(3):15-21. HUANG Rongzun,CHEN Mian,DENG Jingen,et al. Coupling study of mechanics and chemistry of shale wellbore stability[J]. Drilling Fluid & Completion Fluid, 1995,(3):15-21. [10] 蒋官澄,宣扬,王金树,等. 仿生固壁钻井液体系的研究与现场应用[J]. 钻井液与完井液,2014,31(3):1-5.JIANG Guancheng,XUAN Yang,WANG Jinshu,et al. Research and field application of bionic solid wall drilling fluid system[J].Drilling Fluid & Completion Fluid,2014,31(3):1-5. [11] 宣扬,蒋官澄,李颖颖,等.基于仿生技术的强固壁型钻井液体系[J].石油勘探与开发,2013,40(4):497-501.XUAN Yang,JIANG Guancheng,LI Yingying,et al. Based on the bionic technology strong wall type drilling fluid system[J].Petroleum Exploration and Development, 2013,40(4):497-501. [12] 蒋官澄,贺垠博,崔物格,等. 基于盐响应型两性离子聚合物的饱和盐水钻井液[J]. 石油勘探与开发, 2019,46(2):385-390.JIANG Guancheng,HE Yinbo,CUI Wuge,et al. A saturated saltwater drilling fluid based on saltresponsive polyampholytes[J].Petroleum Exploration and Development,2019,46(2):385-390.
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