苏里格气田老井侧钻水平井开发技术实践与认识
|
摘要
为寻求降低开发成本、挖掘井间未动用储量的有效途径,在苏里格气田苏10、苏53区块开展老井侧钻水平井实践,逐步克服了小井眼侧钻施工"塌、漏、卡"及剩余气评价困难等工程、地质难题,形成了与致密砂岩气储集层相适应的侧钻水平井钻完井、优化部署及地质导向等配套技术。侧钻水平井充分利用老井,大幅降低开发成本,提高井间剩余储量动用,产量是相邻直井的3～5倍,其生产效果受钻遇砂岩段长度、水平段在储集层中的位置、动用有效气层厚度、含气饱和度、控制储量、压裂改造等因素影响。苏10、苏53区块至今共钻侧钻水平井12口,平均钻井周期49 d,平均水平段长度689 m,平均有效储集层钻遇率61.5%,投产后初期平均井口压力16.2 MPa,平均日产气量4.7×10~4m~3,截至2017年末平均增产1 000×104m3以上,效果显著。随着区块低产老井增多,富集区井位趋于饱和,剩余含气区品位变差,侧钻水平井开发技术可以向优化井网规划、布井方式以及开拓挖潜区域等方向发展。
To seek effective ways of lowering development cost and tapping inter-well remaining reserves, sidetracking horizontal wells from old wells in Su10 and Su53 Block were conducted. The engineering and geological problems such as leakage, collapse and sticking in slim-hole sidetracking, and difficult evaluation of remaining gas were gradually overcome, and a set of drilling and completion technology, well deployment optimization technology and geo-steering technology suitable for sidetracking horizontal wells in tight sandstone gas reservoirs have been worked out. By making full use of old well, sidetracking horizontal wells can greatly reduce development costs, enhance the producing degree of inter-well remaining reserves, and get production 3-5 times of that of adjacent vertical wells. Its production effect is influenced by encountered sandstone length, the position of horizontal segment in reservoir,produced effective reservoir thickness, gas saturation, controlled reserves and fracturing effect etc. Up to now, in Block Su10 and Su53,12 sidetracking horizontal wells have been drilled, which have an average drilling cycle of 49 days, average horizontal section length of689 m, average effective drilling ratio of 61.5%, average well-head pressure of 16.2 MPa, and daily output of 4.7×10~4 m~3 at the initial stage after production. By the end of 2017, the average yield increment was more than 1 000×10~4 m~3 with good effect. With the increase of low yield old wells, wells in the enrichment regions tend to be saturated and the rest gas-bearing areas are lower in grade, therefore,sidetracking horizontal well can be used for optimization of well pattern, well deployment mode and exploitation of remaining oil areas.
To seek effective ways of lowering development cost and tapping inter-well remaining reserves, sidetracking horizontal wells from old wells in Su10 and Su53 Block were conducted. The engineering and geological problems such as leakage, collapse and sticking in slim-hole sidetracking, and difficult evaluation of remaining gas were gradually overcome, and a set of drilling and completion technology, well deployment optimization technology and geo-steering technology suitable for sidetracking horizontal wells in tight sandstone gas reservoirs have been worked out. By making full use of old well, sidetracking horizontal wells can greatly reduce development costs, enhance the producing degree of inter-well remaining reserves, and get production 3-5 times of that of adjacent vertical wells. Its production effect is influenced by encountered sandstone length, the position of horizontal segment in reservoir,produced effective reservoir thickness, gas saturation, controlled reserves and fracturing effect etc. Up to now, in Block Su10 and Su53,12 sidetracking horizontal wells have been drilled, which have an average drilling cycle of 49 days, average horizontal section length of689 m, average effective drilling ratio of 61.5%, average well-head pressure of 16.2 MPa, and daily output of 4.7×10~4 m~3 at the initial stage after production. By the end of 2017, the average yield increment was more than 1 000×10~4 m~3 with good effect. With the increase of low yield old wells, wells in the enrichment regions tend to be saturated and the rest gas-bearing areas are lower in grade, therefore,sidetracking horizontal well can be used for optimization of well pattern, well deployment mode and exploitation of remaining oil areas.
引文
[1]卢涛,张吉,李跃刚,等.苏里格气田致密砂岩气藏水平井开发技术及展望[J].天然气工业,2013,33(8):38-43.LU Tao,ZHANG Ji,LI Yuegang,et al.Horizontal well development technology for tight sandstone gas reservoirs in the Sulige Gas Field,Ordos Basin[J].Natural Gas Industry,2013,33(8):38-43.
[2]王国勇.致密砂岩气藏水平井整体开发实践与认识:以苏里格气田苏53区块为例[J].石油天然气学报,2012,34(5):153-157.WANG Guoyong.Practice and recognition of horizontal well development in tight sandstone gas reservoirs:A case study from Block Su53[J].Journal of Oil and Gas Technology,2012,34(5):153-157.
[3]徐浩,张君峰,汤达祯,等.鄂尔多斯盆地苏里格气田低压形成的控制因素[J].石油勘探与开发,2012,39(1):64-67.XU Hao,ZHANG Junfeng,TANG Dazhen,et al.Controlling factors of underpressure reservoirs in the Sulige gas field,Ordos Basin[J].Petroleum Exploration and Development,2012,39(1):64-67.
[4]何东博,王丽娟,冀光,等.苏里格致密砂岩气田开发井距优化[J].石油勘探与开发,2012,39(4):458-464.HE Dongbo,WANG Lijuan,JI Guang,et al.Well spacing optimization for Sulige tight sand gas field,NW China[J].Petroleum Exploration and Development,2012,39(4):458-464.
[5]高立军,王广新,郭福祥,等.大庆油田小井眼开窗侧钻水平井钻井技术[J].断块油气田,2008,15(4):94-96.GAO Lijun,WANG Guangxin,GUO Fuxiang,et al.Horizontal well drilling technology by slim hole casing window sidetracking in Daqing Oilfield[J].Fault-Block Oil&Gas Field,2008,15(4):94-96.
[6]白慧,李浮萍,王龙.老井侧钻水平井开发技术在苏里格气田的应用[J].石油化工应用,2014,33(9):14-17.BAI Hui,LI Fuping,WANG Long.Application prospect of sidetracking horizontal technology in old wells in Sulige gasfield[J].Petrochemical Industry Application,2014,33(9):14-17.
[7]夏宝华,王新海,张勇.开窗侧钻水平井挖潜中高渗高含水油藏剩余油的方法[J].石油天然气学报,2005,27(3):380-382.XIA Baohua,WANG Xinhai,ZHANG Yong.Method for taking the potential of residual oil in mid-high permeability and high water-cut reservoirs by using sidetracking horizontal wells[J].Journal of Oil and Gas Technology,2005,27(3):380-382.
[8]孟德伟,贾爱林,冀光,等.大型致密砂岩气田气水分布规律及控制因素:以鄂尔多斯盆地苏里格气田西区为例[J].石油勘探与开发,2016,43(4):607-614,635.MENG Dewei,JIA Ailin,JI Guang,et al.Water and gas distribution and its controlling factors of large scale tight sand gas:A case study of western Sulige gas field,Ordos Basin,NW China[J].Petroleum Exploration and Development,2016,43(4):607-614,635.
[9]王学正,韩永亮,王海霞,等.侧钻水平井分段压裂完井技术在气田的应用[J].石油矿场机械,2014,43(12):44-47.WANG Xuezheng,HAN Yongliang,WANG Haixia,et al.Application of multi-stage fracture completion techniques of horizontal well with slim hole oriented window and sidetracking in gas field[J].Oil Field Equipment,2014,43(12):44-47.
[10]韦孝忠.浅谈苏里格气田老井开窗侧钻水平井技术[J].钻采工艺,2016,39(1):23-25.WEI Xiaozhong.Brief talk on sidetrack horizontal well technology in Sulige Gas Field old wells[J].Drilling&Production Technology,2016,39(1):23-25.
[11]程安新.套管开窗侧钻水平井技术的研究与应用[J].江汉石油职工大学学报,2011,24(5):25-27.CHENG Anxin.Study and application of case overshot for sidetrack drilling horizontal well technology[J].Journal of Jianghan Petroleum University of Staff and Workers,2011,24(5):25-27.
[12]叶光辉,张潮,刘金元.长庆苏里格气田小井眼斜向器使用方法[J].钻采工艺,2017,40(4):119-121.YE Guanghui,ZHANG Chao,LIU Jinyuan.Application method of slim hole slanting device in Sulige gas field[J].Drilling&Production Technology,2017,40(4):119-121.
[13]李瑞明,陶瑞东,何卫滨,等.深层小井眼侧钻水平井钻井技术实践[J].钻采工艺,2015,38(4):113-124.LI Ruiming,TAO Ruidong,HE Weibin,et al.Practice of horizontal well drilling technology in deep small hole side drilling[J].Drilling&Production Technology,2015,38(4):113-124.
[14]曾忠,阎世信,魏修成,等.苏里格气田地震预测技术效果分析对策[J].石油勘探与开发,2003,30(6):63-67.ZENG Zhong,YAN Shixin,WEI Xiucheng,et al.Analysis and countermeasurement of seismic prediction in the Sulige Gas Field[J].Petroleum Exploration and Development,2003,30(6):63-67.
[15]郭智,孙龙德,贾爱林,等.辫状河相致密砂岩气藏三维地质建模[J].石油勘探与开发,2015,42(1):76-83.GUO Zhi,SUN Longde,JIA Ailin,et al.3D geological modeling for tight sand gas reservoir of braided river facies[J].Petroleum Exploration and Development,2015,42(1):76-83.
[16]李爽.致密低渗气田侧钻水平井参数优化与应用:以苏里格气田苏S区块为例[J].非常规油气,2017,4(5):52-56.LI Shuang.Parameter optimization and application of sidetracking horizontal wells in low-permeability tight gas reservoir:A case study of Su-S Block in Sulige Gas Field[J].Unconventional Oil&Gas,2017,4(5):52-56.
[17]陈启文,董瑜,王飞,等.苏里格气田水平井开发技术优化[J].天然气工业,2012,32(6):39-42.CHEN Qiwen,DONG Yu,WANG Fei,et al.Optimization of horizontal well development technology in the Sulige Gas Field[J].Natural Gas Industry,2012,32(6):39-42.
[18]唐钦锡.水平井地质导向技术在苏里格气田开发中的应用:以苏10和苏53区块为例[J].石油与天然气地质,2013,34(3):389-392.TANG Qinxi.Application of geosteering technology in the development of Sulige gas field:Case studies of the Su10 and Su53blocks[J].Oil&Gas Geology,2013,34(3):389-392.
[19]何东博,贾爱林,冀光,等.苏里格大型致密砂岩气田开发井型井网技术[J].石油勘探与开发,2013,40(1):79-89.HE Dongbo,JIA Ailin,JI Guang,et al.Well type and pattern optimization technology for large scale tight sand gas,Sulige gas field[J].Petroleum Exploration and Development,2013,40(1):79-89.
[2]王国勇.致密砂岩气藏水平井整体开发实践与认识:以苏里格气田苏53区块为例[J].石油天然气学报,2012,34(5):153-157.WANG Guoyong.Practice and recognition of horizontal well development in tight sandstone gas reservoirs:A case study from Block Su53[J].Journal of Oil and Gas Technology,2012,34(5):153-157.
[3]徐浩,张君峰,汤达祯,等.鄂尔多斯盆地苏里格气田低压形成的控制因素[J].石油勘探与开发,2012,39(1):64-67.XU Hao,ZHANG Junfeng,TANG Dazhen,et al.Controlling factors of underpressure reservoirs in the Sulige gas field,Ordos Basin[J].Petroleum Exploration and Development,2012,39(1):64-67.
[4]何东博,王丽娟,冀光,等.苏里格致密砂岩气田开发井距优化[J].石油勘探与开发,2012,39(4):458-464.HE Dongbo,WANG Lijuan,JI Guang,et al.Well spacing optimization for Sulige tight sand gas field,NW China[J].Petroleum Exploration and Development,2012,39(4):458-464.
[5]高立军,王广新,郭福祥,等.大庆油田小井眼开窗侧钻水平井钻井技术[J].断块油气田,2008,15(4):94-96.GAO Lijun,WANG Guangxin,GUO Fuxiang,et al.Horizontal well drilling technology by slim hole casing window sidetracking in Daqing Oilfield[J].Fault-Block Oil&Gas Field,2008,15(4):94-96.
[6]白慧,李浮萍,王龙.老井侧钻水平井开发技术在苏里格气田的应用[J].石油化工应用,2014,33(9):14-17.BAI Hui,LI Fuping,WANG Long.Application prospect of sidetracking horizontal technology in old wells in Sulige gasfield[J].Petrochemical Industry Application,2014,33(9):14-17.
[7]夏宝华,王新海,张勇.开窗侧钻水平井挖潜中高渗高含水油藏剩余油的方法[J].石油天然气学报,2005,27(3):380-382.XIA Baohua,WANG Xinhai,ZHANG Yong.Method for taking the potential of residual oil in mid-high permeability and high water-cut reservoirs by using sidetracking horizontal wells[J].Journal of Oil and Gas Technology,2005,27(3):380-382.
[8]孟德伟,贾爱林,冀光,等.大型致密砂岩气田气水分布规律及控制因素:以鄂尔多斯盆地苏里格气田西区为例[J].石油勘探与开发,2016,43(4):607-614,635.MENG Dewei,JIA Ailin,JI Guang,et al.Water and gas distribution and its controlling factors of large scale tight sand gas:A case study of western Sulige gas field,Ordos Basin,NW China[J].Petroleum Exploration and Development,2016,43(4):607-614,635.
[9]王学正,韩永亮,王海霞,等.侧钻水平井分段压裂完井技术在气田的应用[J].石油矿场机械,2014,43(12):44-47.WANG Xuezheng,HAN Yongliang,WANG Haixia,et al.Application of multi-stage fracture completion techniques of horizontal well with slim hole oriented window and sidetracking in gas field[J].Oil Field Equipment,2014,43(12):44-47.
[10]韦孝忠.浅谈苏里格气田老井开窗侧钻水平井技术[J].钻采工艺,2016,39(1):23-25.WEI Xiaozhong.Brief talk on sidetrack horizontal well technology in Sulige Gas Field old wells[J].Drilling&Production Technology,2016,39(1):23-25.
[11]程安新.套管开窗侧钻水平井技术的研究与应用[J].江汉石油职工大学学报,2011,24(5):25-27.CHENG Anxin.Study and application of case overshot for sidetrack drilling horizontal well technology[J].Journal of Jianghan Petroleum University of Staff and Workers,2011,24(5):25-27.
[12]叶光辉,张潮,刘金元.长庆苏里格气田小井眼斜向器使用方法[J].钻采工艺,2017,40(4):119-121.YE Guanghui,ZHANG Chao,LIU Jinyuan.Application method of slim hole slanting device in Sulige gas field[J].Drilling&Production Technology,2017,40(4):119-121.
[13]李瑞明,陶瑞东,何卫滨,等.深层小井眼侧钻水平井钻井技术实践[J].钻采工艺,2015,38(4):113-124.LI Ruiming,TAO Ruidong,HE Weibin,et al.Practice of horizontal well drilling technology in deep small hole side drilling[J].Drilling&Production Technology,2015,38(4):113-124.
[14]曾忠,阎世信,魏修成,等.苏里格气田地震预测技术效果分析对策[J].石油勘探与开发,2003,30(6):63-67.ZENG Zhong,YAN Shixin,WEI Xiucheng,et al.Analysis and countermeasurement of seismic prediction in the Sulige Gas Field[J].Petroleum Exploration and Development,2003,30(6):63-67.
[15]郭智,孙龙德,贾爱林,等.辫状河相致密砂岩气藏三维地质建模[J].石油勘探与开发,2015,42(1):76-83.GUO Zhi,SUN Longde,JIA Ailin,et al.3D geological modeling for tight sand gas reservoir of braided river facies[J].Petroleum Exploration and Development,2015,42(1):76-83.
[16]李爽.致密低渗气田侧钻水平井参数优化与应用:以苏里格气田苏S区块为例[J].非常规油气,2017,4(5):52-56.LI Shuang.Parameter optimization and application of sidetracking horizontal wells in low-permeability tight gas reservoir:A case study of Su-S Block in Sulige Gas Field[J].Unconventional Oil&Gas,2017,4(5):52-56.
[17]陈启文,董瑜,王飞,等.苏里格气田水平井开发技术优化[J].天然气工业,2012,32(6):39-42.CHEN Qiwen,DONG Yu,WANG Fei,et al.Optimization of horizontal well development technology in the Sulige Gas Field[J].Natural Gas Industry,2012,32(6):39-42.
[18]唐钦锡.水平井地质导向技术在苏里格气田开发中的应用:以苏10和苏53区块为例[J].石油与天然气地质,2013,34(3):389-392.TANG Qinxi.Application of geosteering technology in the development of Sulige gas field:Case studies of the Su10 and Su53blocks[J].Oil&Gas Geology,2013,34(3):389-392.
[19]何东博,贾爱林,冀光,等.苏里格大型致密砂岩气田开发井型井网技术[J].石油勘探与开发,2013,40(1):79-89.HE Dongbo,JIA Ailin,JI Guang,et al.Well type and pattern optimization technology for large scale tight sand gas,Sulige gas field[J].Petroleum Exploration and Development,2013,40(1):79-89.