克深气田异常高压气井井筒异常堵塞治理
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摘要
随着克深气田的开发,井筒堵塞井数增多,堵塞程度越来越严重,影响了单井的安全平稳生产,制约了气田的高效开发。为此,针对气井井筒堵塞现状,结合单井生产动态特征、现场解堵情况、井筒返出物系统分析,认为造成气井井筒堵塞的主要堵塞物为垢和砂,堵塞模式分为垢堵、砂堵和砂垢混合堵3种模式。根据堵塞模式特点及井筒完整性,结合酸化解堵、连续油管冲砂解堵和大修3种传统疏通井筒措施的优缺点,提出了4种综合治理措施:垢堵井采用酸化解堵,砂堵井采用连续油管冲砂解堵,砂垢混合堵井采用连续油管冲砂和酸化综合解堵,管柱错断井采用大修更换管柱。实际应用证明,分模式治理不但可以高效疏通井筒,同时也可降低生产成本。
With the development of the Keshen gas field, the number of plugged wells is gradually increasing, and the degree of plugging is becoming more and more serious, which has affected the safe and stable well production and restricted the efficient development of the gas field. Therefore, aiming to the current situation of wellbore plugging and combined with well production performance, in-situ plugging removal situation and systematical analysis of wellbore returns, it is considered that the main factors causing wellbore plugging are scale plug and sand plug, and the plugging mode is divided into three types: scale plug, sand plug and sand-scale mixed plug. According to the characteristics of the three plugging modes and wellbore integrity, four targeted measures are proposed:applying acidizing unplugging technology in the scale plugging wells, applying coiled tubing technology in the sand plugging wells, applying coiled tubing and acidization in the sandscale mixed plugging wells and replacing pipe string in the pipe string breaking wells. The actual results show that the application of the four measures can effectively dredge the plugged wellbores and meanwhile reduce the production cost.
With the development of the Keshen gas field, the number of plugged wells is gradually increasing, and the degree of plugging is becoming more and more serious, which has affected the safe and stable well production and restricted the efficient development of the gas field. Therefore, aiming to the current situation of wellbore plugging and combined with well production performance, in-situ plugging removal situation and systematical analysis of wellbore returns, it is considered that the main factors causing wellbore plugging are scale plug and sand plug, and the plugging mode is divided into three types: scale plug, sand plug and sand-scale mixed plug. According to the characteristics of the three plugging modes and wellbore integrity, four targeted measures are proposed:applying acidizing unplugging technology in the scale plugging wells, applying coiled tubing technology in the sand plugging wells, applying coiled tubing and acidization in the sandscale mixed plugging wells and replacing pipe string in the pipe string breaking wells. The actual results show that the application of the four measures can effectively dredge the plugged wellbores and meanwhile reduce the production cost.
引文
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[12]张威,王铎.超级马氏体不锈钢SuperCr13在模拟地层水环境中的腐蚀行为[J].腐蚀与防护,2013,34(8):702-705.ZHANG Wei,WANG Duo. Corrosion behaviour of super martensitic stainless steel SuperCr13 in simulated formation water environment[J]. Corrosion&Protection,2013,34(8):702-705.
[13]廖碧朝,宋永芳,梁顺武,等.含硫化氢气井井筒堵塞解堵对策研究[J].油气井测试,2015,24(6):62-64.LIAO Bichao,SONG Yongfang,LIANG Shunwu,et al. Plug removal counter measures to well bore plugging of gas well bearing hydrogen sulfide[J]. Well Testing,2015,24(6):62-64.
[14]张宝,匡韶华,魏军会,等.连续油管解堵技术在克深区块超深高压气井中的应用[J].油气井测试,2017,26(6):41-43.ZHANG Bao,KUANG Shaohua,WEI Junhui,et al. Application of coiled tubing plugging removal technique in ultra-deep high pressure gas well in Keshen block[J]. Well Testing,2017,26(6):41-43.
[2]李玲,唐洪明,王茜,等.克拉苏冲断带克深区带白垩系超深储集层成岩演化[J].新疆石油地质,2017,38(1):7-14.LI Ling,TANG Hongming,WANG Xi,et al. Diagenetic evolution of Cretaceous ultra-deep reservoir in Keshen belt,Kelasu thrust belt,Kuqa depression[J]. Xinjiang Petroleum Geology,2017,38(1):7-14.
[3]易士威,杨海军,李君,等.塔里木盆地前陆冲断带含油气构造样式及成藏主控因素[J].新疆石油地质,2012,33(3):272-276.YI Shiwei,YANG Haijun,LI Jun,et al. Petroliferous structural styles and oil-accumulation control factors in foreland thrust belt in Tarim basin[J]. Xinjiang Petroleum Geology,2012,33(3):272-276.
[4]冯松宝.超高压大气田(藏)成因机理——以库车坳陷为例[J].新疆石油地质,2012,33(5):517-519.FENG Songbao. Genetic mechanism of overpressure large gas field(reservoir)—an example from Kuqa depression in Tarim basin[J].Xinjiang Petroleum Geology,2012,33(5):517-519.
[5]董长银.油气井防砂技术[M].北京:中国石化出版社,2009:22-25.DONG Changyin. Sand control technology in oil and gas wells[M].Beijing:China Petrochemical Press,2009:22-25.
[6]姜伟,邓建明,范白涛,等.海上油气田防砂设计[M].北京:石油工业出版社,2014:1-3.JIANG Wei,DENG Jianming,FAN Baitao,et al. Design of sand control in offshore oil-gas fields[M]. Beijing:Petroleum Industry Press,2014:1-3.
[7]张宝,匡韶华,曾努,等.克深气田压裂改造后地层出砂原因探讨[J].天然气技术与经济,2017,11(5):13-17.ZHANG Bao,KUANG Shaohua,ZENG Nu,et al. Causes of sand production after fracturing,Keshen gas field[J]. Natural Gas Technology and Economy,2017,11(5):13-17.
[8]熊春明,周福建,宗贻平,等.青海涩北气田出砂规律实验研究[J].天然气工业,2007,27(10):90-91.XIONG Chunming,ZHOU Fujian,ZONG Yiping,et al. An experimental study on sanding mechanism in Sebei gas field,Qinghai[J].Natural Gas Industry,2007,27(10):90-91.
[9]钟兵,马力宁,杨雅和,等.多层组砂岩气藏气井出砂机理及对策研究[J].天然气工业,2004,24(10):89-92.ZHONG Bing,MA Lining,YANG Yahe,et al. Study on sand producing mechanism of gas wells and counter measurse for gas reservoirs with multilayer sand[J]. Natural Gas Industry,2004,24(10):89-92.
[10]张秋实,陈微,王宝辉,等.大庆油田三元复合驱采出井结垢性质和规律[J].新疆石油地质,2010,31(1):78-80.ZHANG Qiushi,CHEN Wei,WANG Baohui,et al. Scaling property and regularity of production well by ASP flooding process in Daqing oil field[J]. Xinjiang Petroleum Geology,2010,31(1):78-80.
[11]李丽,刘建仪,张威,等.高温高压气藏地层水结垢规律实验研究[J].西南石油大学学报(自然科学版),2012,34(1):134-140.LI Li,LIU Jianyi,ZHANG Wei,et al. Experimental research for gas feild water’s scaling rule under the condition of high pressure and high temperature[J]. Journal of Southwest Petroleum University(Science&Technology Edition),2012,34(1):134-140.
[12]张威,王铎.超级马氏体不锈钢SuperCr13在模拟地层水环境中的腐蚀行为[J].腐蚀与防护,2013,34(8):702-705.ZHANG Wei,WANG Duo. Corrosion behaviour of super martensitic stainless steel SuperCr13 in simulated formation water environment[J]. Corrosion&Protection,2013,34(8):702-705.
[13]廖碧朝,宋永芳,梁顺武,等.含硫化氢气井井筒堵塞解堵对策研究[J].油气井测试,2015,24(6):62-64.LIAO Bichao,SONG Yongfang,LIANG Shunwu,et al. Plug removal counter measures to well bore plugging of gas well bearing hydrogen sulfide[J]. Well Testing,2015,24(6):62-64.
[14]张宝,匡韶华,魏军会,等.连续油管解堵技术在克深区块超深高压气井中的应用[J].油气井测试,2017,26(6):41-43.ZHANG Bao,KUANG Shaohua,WEI Junhui,et al. Application of coiled tubing plugging removal technique in ultra-deep high pressure gas well in Keshen block[J]. Well Testing,2017,26(6):41-43.
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