韦2断块细分层酸化工艺技术的研究与应用
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摘要
针对江苏油田韦2断块油藏小层多、夹层薄、非均质性强,笼统酸化效果差的特点,从低渗、薄互层、非均质性油藏实际情况出发,依据PND和Sor测试结果,结合油井生产动态,优化选择分层酸液及其添加剂;开展细分层酸化增产机理研究,量化施工参数与增产关系,以细分层酸化为基础,结合油水井具体特点开展了细分-定位、细分-卡堵水、细分-逆向布酸、细分-强酸强采等多项技术综合应用,达到单井增油降水的效果;并将细分定位、细分管柱、多层多段酸以及小层段施工技术与复杂小断块油藏特点结合,建立和完善非均质、薄互层油藏细分层酸化工艺技术;针对低压、低渗油藏酸化后残酸返排困难,研究与应用了“链式反应”残酸强排技术,依靠气体的“推”“拉”双重作用,提高残酸的返排程度;研发出高效、易操作的现场残酸过滤装置、优选残酸处理剂,实现残酸现场即时处理回注。
现场实施油水井细分层酸化15井次,其中油井14口,成功率93.3%,有效率86.7%,累计增产原油8236t,平均单井增油588.3t。细分层酸化不仅实现单井增油降水的双重目的,同时有效地改善井组的平面水驱方向,提升了整个井组的开发效果。
The wei2 block oilfield has more sublayers, thin interbed, strong aeolotropism, and poor effect of commingled acidify. For the oilfield’s actual situation, according to the test result of PND and Sor, and binding the production performance of the oilfield, we optimize the separate minilayer acidizing fluid and its additives. We investigate the mechanism of separate minilayer acidify technology, quantify the relationship between implementation parameters and increase production. We treating separate minilayer acidify as the foundation and combinding the extensional characteristics of oil/water well, develop many applicable polytecnica, such as: separate minilayer-allocation, separate minilayer-water plugging, separate minilayer-reversed acidify,separate minilayer-strong acid exploitation and so on, consequently get more oil and less water. And we combind the separate minilayer-allocation, separate minilayer pipe string, multilayer multisection acids, operating technique for small interval with the characteristics of small complex block oilfield, finally built up and improve the separate minilayer acidify technology for anisotropic, flaser oilfield. After acid treatment of low pressure and permeable reservoir, spent acid flows back difficultly. Be aim at this, the technology of“chain reaction”is researched and applied, which depends on double action of gas that are push and pull, improving the degree of spent acid’s flowback; filtering system of spent acid that are high efficiency and maneuverable and preferential treating chemical of spent acid are developed, which realize immediate processing of spent acid in the field.
In the field conduct, there are 15 times with separate minelayer acidizing in oil/water well. In these wells, there are 14 oil wells. And success rate is 93.3%, availability is 86.7%, cumulative incremental oil production is 8236t, and average increasing production of one well is 588.3t. Separate minelayer acidizing not only achieves dual purpose that per well stimulation and precipitation, but also it can improve the direction of plane waterflood of well group, which advance product effect of whole waterflood.
现场实施油水井细分层酸化15井次,其中油井14口,成功率93.3%,有效率86.7%,累计增产原油8236t,平均单井增油588.3t。细分层酸化不仅实现单井增油降水的双重目的,同时有效地改善井组的平面水驱方向,提升了整个井组的开发效果。
The wei2 block oilfield has more sublayers, thin interbed, strong aeolotropism, and poor effect of commingled acidify. For the oilfield’s actual situation, according to the test result of PND and Sor, and binding the production performance of the oilfield, we optimize the separate minilayer acidizing fluid and its additives. We investigate the mechanism of separate minilayer acidify technology, quantify the relationship between implementation parameters and increase production. We treating separate minilayer acidify as the foundation and combinding the extensional characteristics of oil/water well, develop many applicable polytecnica, such as: separate minilayer-allocation, separate minilayer-water plugging, separate minilayer-reversed acidify,separate minilayer-strong acid exploitation and so on, consequently get more oil and less water. And we combind the separate minilayer-allocation, separate minilayer pipe string, multilayer multisection acids, operating technique for small interval with the characteristics of small complex block oilfield, finally built up and improve the separate minilayer acidify technology for anisotropic, flaser oilfield. After acid treatment of low pressure and permeable reservoir, spent acid flows back difficultly. Be aim at this, the technology of“chain reaction”is researched and applied, which depends on double action of gas that are push and pull, improving the degree of spent acid’s flowback; filtering system of spent acid that are high efficiency and maneuverable and preferential treating chemical of spent acid are developed, which realize immediate processing of spent acid in the field.
In the field conduct, there are 15 times with separate minelayer acidizing in oil/water well. In these wells, there are 14 oil wells. And success rate is 93.3%, availability is 86.7%, cumulative incremental oil production is 8236t, and average increasing production of one well is 588.3t. Separate minelayer acidizing not only achieves dual purpose that per well stimulation and precipitation, but also it can improve the direction of plane waterflood of well group, which advance product effect of whole waterflood.
引文
[1] 毛凤鸣,戴靖.复杂小断块.北京:中国石化出版社,2005
[2] 黄伟.复杂小断块老油田稳产技术研究.海洋石油,2003(3):77～81
[3] 马欣本,蔡刚等.韦 2 块低渗-特低渗油藏高速高效开发技术.西南石油学院学报,2003,25(3):19～20
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[7] Perthuis H, Touboul E.and Piot B. Acid Reactions and Damage Removal in Sandstone: A Model for Selecting the Acid Formulation, SPE18469.
[8] Jude O.Amaefule, David G.Kersey, David K.Norman and Patti M.Shannon. Advances in Formation Damage Assessment and Control strategies, Paper No.88-89-65.
[9] 张玄奇,尉立岗.低渗油田选择性酸化机理及室内试验.石油钻采工艺,2002,24(5):47～49
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[11] Glovanni Paccaloni and Mauro Tambini. Advances in Matrix Stimulation Technology, JPT March, 1993, V45, No.3.
[12] 国外砂岩基质酸化.江苏:小型油气藏编辑部
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[15] 罗向东,罗平亚.屏蔽式暂堵技术在储层保护中的应用研究.钻井液与完井液,1992,9(2):19～27
[16] Mauro Tambini. An Effective Matrix Stimulation Technique for Horizontal Wells. SPE24993.
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[18] 张绍槐等.保护油气层技术.北京:石油工业出版社,1993
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[21] 杨康敏,黄河等.油层细分酸化改造工艺技术.河南石油,1998,12(6):41～44
[22] 张键.逐层开采工艺管柱的设计与应用.石油钻采工艺,2000,(6)
[23] 张士莆.滑套使用中若干问题探讨.钻采工艺,2003(1)
[24] 魏瑞玲.Y341-114 封隔器在文动油田的应用.石油机械,2003(3)
[25] 彭永才.薄夹层定位技术在油水井上的应用.河南石油 1998,(5)
[26] Williams,BB., Whiteley,M.E. Hydrofluoric Acidizing Fundamentals. Monograph Series, SPE, Dallas(1979)6,1～124
[27] McLeod,HO. Matrix Acidizing. J.Pet.Tech, (December 1984)2055～2069
[28] 汤元春.江苏油田低渗油藏酸化工艺技术的研究与应用.中国石化油气开采技术论坛论文集,2006,119～129
[29] 张艳琴.临商油田砂岩油层低伤害酸酸化试验研究.油气采收率技术1995,2(3):66～69
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[31] Houchin L.R., Foxenburg W.E.,UsieM.J., Zhao Jun. A New Technique for the Evaluation of Acid AddiTIVE packages. SPE23817
[32] Da MottaE.P., Schechter R.S., Hill A.D.. The Relationship Between Reservoir Mineralogy and Optimum Sandstone Acid Treatment. SPE23802
[33] 王新英,宋庆伟.一种新型砂岩基质酸化技术-硝酸粉末酸化.压裂酸化技术论文集,北京:石油工业出版社,1999:241～244
[34] 天津大学普通化学教研室.无机化学(下),北京:高等教育出版社,1984
[35] 汤元春,袁玉锋,程宇辉,黄一汉,毕文平.非活性硝酸粉末液酸化工艺技术的研究与应用.西南石油学院学报,2002,24(1):91～95
[36] 天津大学普通化学教研室.无机化学(上),北京:高等教育出版社,1984
[2] 黄伟.复杂小断块老油田稳产技术研究.海洋石油,2003(3):77～81
[3] 马欣本,蔡刚等.韦 2 块低渗-特低渗油藏高速高效开发技术.西南石油学院学报,2003,25(3):19～20
[4] Gdanski R.D, Experience and Research Show Best Designs for Foam-diverted Acidizing, Oil & Gas Journal Sept 6, 1993,V91,N0.36.
[5] Curtis Crowe, Jacques Masmonteil and Ron Thomas. Trends in Matrix Acidizing. Completion/Stimulation, Oil-field Review, October 1992.
[6] Harry O.Mcleod. Significant Factors for Successful Matrix Acidizing. NMT890021.
[7] Perthuis H, Touboul E.and Piot B. Acid Reactions and Damage Removal in Sandstone: A Model for Selecting the Acid Formulation, SPE18469.
[8] Jude O.Amaefule, David G.Kersey, David K.Norman and Patti M.Shannon. Advances in Formation Damage Assessment and Control strategies, Paper No.88-89-65.
[9] 张玄奇,尉立岗.低渗油田选择性酸化机理及室内试验.石油钻采工艺,2002,24(5):47～49
[10] Pacca1oni G., Tambini M, Galoppini M. Key Factors for Enhanced Results of Matrix Stimulation Treatments, SPE17154.
[11] Glovanni Paccaloni and Mauro Tambini. Advances in Matrix Stimulation Technology, JPT March, 1993, V45, No.3.
[12] 国外砂岩基质酸化.江苏:小型油气藏编辑部
[13] 程宇辉,黄一汉,景步宏,汤元春等.抽油机井暂堵热洗工艺初探.钻采工艺,2004,27(2):84～86
[14] 赵立强等.暂堵酸化试验研究.西南石油学院学报,1995,17(1):56～61
[15] 罗向东,罗平亚.屏蔽式暂堵技术在储层保护中的应用研究.钻井液与完井液,1992,9(2):19～27
[16] Mauro Tambini. An Effective Matrix Stimulation Technique for Horizontal Wells. SPE24993.
[17] 程时清译,夏位荣校,油藏工程中地质伤害模拟,第九届 SPE 油层保护会议论文集,北京:石油工业出版社,1992,P233
[18] 张绍槐等.保护油气层技术.北京:石油工业出版社,1993
[19] Moore,E.W.,Crowe,C.W., Hendrickson A.R. Formation Effect and Prevention of Asphaltene Sludges During Stimulation Treatments. J.Pet.Tech. (Sept.1965)1023～1028.
[20] 张玄奇,尉立岗.低渗油田选择性酸化机理及室内试验.石油钻采工艺,2002,24(5):47～49
[21] 杨康敏,黄河等.油层细分酸化改造工艺技术.河南石油,1998,12(6):41～44
[22] 张键.逐层开采工艺管柱的设计与应用.石油钻采工艺,2000,(6)
[23] 张士莆.滑套使用中若干问题探讨.钻采工艺,2003(1)
[24] 魏瑞玲.Y341-114 封隔器在文动油田的应用.石油机械,2003(3)
[25] 彭永才.薄夹层定位技术在油水井上的应用.河南石油 1998,(5)
[26] Williams,BB., Whiteley,M.E. Hydrofluoric Acidizing Fundamentals. Monograph Series, SPE, Dallas(1979)6,1～124
[27] McLeod,HO. Matrix Acidizing. J.Pet.Tech, (December 1984)2055～2069
[28] 汤元春.江苏油田低渗油藏酸化工艺技术的研究与应用.中国石化油气开采技术论坛论文集,2006,119～129
[29] 张艳琴.临商油田砂岩油层低伤害酸酸化试验研究.油气采收率技术1995,2(3):66～69
[30] 王同良译,司娇艳校.砂岩酸化作业的最优化.第九届 SPE 油层保护会议论文集,北京:石油工业出版社,1992,P283
[31] Houchin L.R., Foxenburg W.E.,UsieM.J., Zhao Jun. A New Technique for the Evaluation of Acid AddiTIVE packages. SPE23817
[32] Da MottaE.P., Schechter R.S., Hill A.D.. The Relationship Between Reservoir Mineralogy and Optimum Sandstone Acid Treatment. SPE23802
[33] 王新英,宋庆伟.一种新型砂岩基质酸化技术-硝酸粉末酸化.压裂酸化技术论文集,北京:石油工业出版社,1999:241～244
[34] 天津大学普通化学教研室.无机化学(下),北京:高等教育出版社,1984
[35] 汤元春,袁玉锋,程宇辉,黄一汉,毕文平.非活性硝酸粉末液酸化工艺技术的研究与应用.西南石油学院学报,2002,24(1):91～95
[36] 天津大学普通化学教研室.无机化学(上),北京:高等教育出版社,1984