Treatment of CO2 Contamination to Water Base Drilling Fluids
-
摘要: 虽然目前钻井液CO2污染处理技术的研究成果较多,但在实际应用中仍然存在许多问题,是一个十分棘手的问题。总结了常见的CO2污染处理方式及其不足之处。针对水基钻井液CO2污染现象,根据污染机理提出了处理建议:保持钻井液中适度的黏土含量,使用Ca (OH)2和CaCl2等钙处理剂;使用抗高温抗盐的强吸附性处理剂、适当使用新浆替代老浆。介绍了XX46-X1和XX008-6-X2两口受CO2污染井的处理情况。以XX46-X1井为例,采取的具体措施有:使用离心机控制固相含量,用真空除气器不间断在地面脱气,增大钻井液密度至2.0 g/cm3,以阻止CO2进入流体;使用适量0.2%石灰乳冲入钻井液,补充SMP-Ⅲ、SMP-Ⅱ、高温抗盐降滤失剂RSTF、高温稀释剂HTX等处理剂及NaOH胶液;由于污染较为严重,后期配制胶液时加入适量0.5% CaCl2配合处理。受污染钻井液按建议经过处理后,钻井液黏度、切力降低,流变性和滤失量得到控制,满足了工程需要,达到了预期目的。Abstract: Many technologies handling CO2 contamination to drilling fluids have shortages in practical use. This paper summarizes the defciencies of the methods commonly used, and presents advices for the treatment of CO2 contamination based on the mechanisms of contamination:drilling fluid should have moderate bentonite content, and Ca(OH)2 and CaCl2 should be used. High temperature saltresistant and highly adsorptive drilling fluid additives should be used, and old mud replaced with new one if necessary. Contamination of drilling fluids by CO2 has been encounteredin drilling the wells XX46-X1and XX008-6-X2. To cope with the CO2 contamination in drilling the well XX46-X1, centrifuges were used to control solids content and vacuum degassers used for continuous degassing of the drilling fluid at the surface. Mud density was increased to 2.0 g/cm3 to prevent CO2 gas cut. A proper amount of 0.2% Ca(OH)2, SMP-II, SMP-III, RSTF (high temperature salt-resistant flter loss reducer), HTX (high temperature thinner) and NaOH solution were usedto minimize the negative effects of CO2 on the properties of the drilling fluid. 0.5% CaCl2 solution was used when the CO2 gas cut became severe in late period. With these treatment, the viscosity and gel strengths of the drilling fluid were reduced, and the rheology and flter loss controlled, satisfying the needs of engineering and achieving the desired results.
-
Key words:
- Drilling fluid /
- CO2 /
- Calcium treatment agent /
- Bentonite /
- Drilling additives
-
[1] 黄宏军, 任小娜, 宋士军. 濮深15井钻井液技术难点与解决方法[J]. 钻采工艺, 2001, 24(2):80-82.HUANG Hongjun, REN Xiaona, SONG Shijun. The technology difficulties and solutions of drilling fluid in well Pushen 15[J]. Drilling & Production Technology, 2001, 24(2):80-82. [2] 马慧, 朱成军. 超细水泥处理深井钻井液HCO3-和CO32-污染[J]. 钻井液与完井液, 2011, 28(3):88-90.MA Hui, ZHU Chengjun. Study on treatment of contamination of HCO3-and CO32-by ultra-fine cement in deep well drilling fluid[J]. Drilling Fluid & Completion Fluid, 2011, 28(3):88-90. [3] 黄宏军. 超深井钻井液完井液HCO3-和CO32-污染规律和处理方法[J]. 钻井液与完井液, 2003, 20(4):31-33.HUANG Hongjun. HCO3-&CO32-contamination in ultradeep wells and its treating method[J]. Drilling Fluid & Completion Fluid, 2003, 20(4):31-33. [4] 郭光辉. 大庆深探井水基钻井液体系研究[D]. 大庆石油学院, 2006. GUO Guanghui.Study on water-based drilling fluid system for deep exploartion well of daqing[D]. Daqing Petroleum Institute, 2006. [5] 孙长健, 彭园, 张仁德, 等.CO32-和HCO3-离子对钻井液的污染及处理[J]. 精细石油化工进展, 2009, 10(9):28-30.SUN Changjian, PENG Yuan, ZHANG Rende, et al. Contamination of drilling fluid by carbonate ion and bicarbonate ion and its treatment[J]. Advances in Fine Petrochemicals, 2009, 10(9):28-30. [6] 金军斌. 钻井液CO2污染的预防与处理[J]. 钻井液与完井液, 2001, 18(2):14-16.JIN Junbin. Prevention and treatment for CO 2 contamination of drilling fluid[J].Drilling Fluid & Completion Fluid, 2001, 18(2):14-16. [7] 刘涛光, 杨文华, 苟建, 等. 风城井区钻井液抗CO32-污染分析[J]. 新疆石油科技, 2010, 20(2):6-8.LIU Taoguang, YANG Wenhua, GOU Jian, et al. Analysis for CO32-contamination of drilling fluid in wells Fengcheng[J]. Xinjiang Petroleum Science & Technology, 2010, 20(2):6-8. [8] 杨勇, 赵娜. 钻井液CO2污染的预防及处理[J]. 中国石油和化工标准与质量, 2012(S1):41-42. YANG Yong,ZHAO Na. Prevention and treatment for CO2 contamination of drilling fluid[J].China Petroleum and Chemical Standard and Quality, 2012(S1):41-42. [9] 管强盛, 陈礼仪, 张林生, 等. 汶川科钻WFSD-4孔钻井液CO2污染及其处理[J]. 探矿工程(岩土钻掘工程), 2014, 41(4):14-18. GUAN Qiangsheng, CHEN Liyi, ZHANG Linsheng, et al.Drilling fluid CO2 contamination in WFSD-4 of wenchuan scientific drilling and the treatment[J]. Exploration Engineering(Rock & Soil Drilling and Tunneling), 2014, 41(4):14-18. [10] 李子成, 张希柱.CO32-离子对钻井液的污染及处理[J]. 石油钻采工艺, 1999, 21(6):25-28.LI Zicheng, ZHANG Xizhu. Contamination of carbonate ion on drilling fluid and its treatment[J].Oil Drilling & Production Technology, 1999, 21(6):25-28. [11] 梁大川. 硅酸盐钻井液稳定井壁机理分析[J]. 西南石油学院学报, 1998, 20(2):53-55.LIANG Dachuan. Borehole stability mechanism of silicate-based drilling fluids[J]. Journal of Southwest Petroleum Institute, 1998, 20(2):53-55. [12] 王立建,于峰.L-1超深井钻井液CO2污染处理技术[J]. 石油钻采工艺, 2003, 25(1):015. WANG Lijian, YU Feng. Treatment of CO2 pollution in L-1 ultra-deep well drilling fluid[J].Oil Drilling & Production Technology, 2003, 25(1):015. [13] 步玉环, 付怀刚, 穆海朋. 油溶性水泥材料优选试验研究[J]. 石油钻探技术, 2008, 36(3):62-65.BU Yuhuan, FU Huaigang, MU Haipeng. Experimental study on optimization of material for oil-soluble cement[J].Petroleum Drilling Techniques, 2008, 36(3):62-65. [14] 王富华, 王力, 张神徽. 深井水基钻井液流变性调控机理研究[J]. 断块油气田, 2007, 14(5):61-63.WANG Fuhua, WANG Li, ZHANG Shenhui. Controlling mechanism of rheology of water-base drilling fluid in deep well[J].Fault-Block Oil & Gas Field, 2007, 14(5):61-63. [15] 张坤, 黄平, 郑有成, 等. 高密度水基钻井液CO2污染防治技术[J]. 天然气技术与经济, 2011, 5(2):48-50.ZHANG Kun, HUANG Ping, ZHENG Youcheng, et al. Prevention of high-density water-base drilling fluid from CO2 pollution[J].Natural Gas Technology and Economy, 2011, 5(2):48-50. [16] 李斌, 石秉忠, 彭商平, 等. 元坝地区高密度钻井液CO2污染处理技术[J]. 钻井液与完井液,2013,30(5):22-24.LI Bin, SHI Bingzhong, PENG Shangping, et al.CO2 contamination treatment technology of high density drilling fluid in block of yuanba[J].Drilling Fluid & Completion Fluid, 2013, 30(5):22-24. [17] 王桂全. 大庆深井钻井液CO2侵处理技术[D]. 大庆石油学院, 2010. WANG Guiquan. Processing techinc of CO2 invading drilling fluid in daqing deep well[D]. Daqing Petroleum Institute, 2010. [18] 郑艳茹. 钻井液CO32-/HCO3-污染机理研究[D]. 中国石油大学, 2011. ZHENG Yanru.Research on pollution mechanism of CO32-/HCO3-in drilling fluid[D].China University of Petroleum, 2011. [19] K E L E S S I D I S V C, T S A M A N T A K I C, DALAMARINIS P. Effect of pH and electrolyte on the rheology of aqueous wyoming bentonite dispersions[J]. Applied Clay Science, 2007, 38(1):86-96. [20] 刘翔, 罗宇峰, 王娟, 等. 钻井液CO2污染的测试方法及处理技术[J]. 钻采工艺, 2009, 32(6):78-81.. LIU Xiang, LUO Yufeng, WANG Juan, et al. Testing method and treating technology for CO2 pollution of drilling fluid[J]. Drilling & Production Technology, 2009, 32(6):78-81. [21] 陈富全, 聂强勇, 夏荣徽. 天东007-XIO井CO2污染处理技术[J]. 钻井液与完井液, 2012, 29(5):92-94.CHEN Fuquan, NIE Qiangyong, XIA Ronghui. CO2 pollution treatment technology in well Tiandong 007-XIO[J]. Drilling Fluid & Completion Fluid, 2012, 29(5):92-94. [22] 刘增利. 钻井液CO2气体污染起泡原因分析及处理[J]. 化工管理, 2014, 33:175. LIU Zengli. Analysis and treatment of CO2 foam pollution of drilling fluid[J].Chemical Enterprise Management, 2014, 33:175.
点击查看大图
计量
- 文章访问数: 540
- HTML全文浏览量: 141
- PDF下载量: 405
- 被引次数: 0