提高水平扩径井段顶替效率是提高水平井固井质量的途径之一,但相关研究存在假设过于理想化、与现场实际不相符的问题。为此,利用CFD数值模拟方法,以大庆油田古龙页岩储层为例,开展了椭圆形水平扩径井段固井水泥浆三维顶替模拟研究。结果表明:偏心度越高,扩径段的宽窄间隙处的流速差越显著,偏心度为0.7时,流速差达到2.00 m/s,钻井液很难被完全顶替;最大扩径段位于扩径段中部时,水泥浆顶替效率最高,扩径段靠近最大扩径处一侧时,水泥浆顶替效率变差,易形成钻井液滞流区;套管高偏心度条件下,顶替效率随套管转速增加显著改善,偏心度为0.7时,套管转速从30 r/min增至40 r/min,顶替效率提高1.17个百分点;主轴旋转会改变扩径段的几何形状,主轴方位角为60~120 °时,顶替效率变化明显,由60 °增至90 °时,顶替效率降低0.81个百分点。该研究结果有助于提高页岩储层椭圆形水平扩径井段的固井质量。
Improving the displacement efficiency of horizontal expansion well section is one of the ways to improve the quality of horizontal well cementing, but the relevant study assumptions are too ideal and do not match the actual situation in the field. For this reason, a three-dimensional displacement simulation study of cementing slurry in elliptical horizontal expansion well section was carried out by using CFD numerical simulation method and taking Gulong Shale Reservoir as an example. The result shows that the higher the eccentricity, the more significant the flow velocity difference at the wide and narrow gap of the expansion well section, and when the eccentricity was 0.7, the flow velocity difference reached 2.00 m/s, which made it difficult for drilling fluid to be completely displaced.When the maximum expansion well section was located in the middle of the expansion section, the cement slurry displacement efficiency was the highest, and when the expansion section was close to one side of maximum expansion section, the cement slurry displacement efficiency became poor, and it was easy to form a drilling fluid stagnation zone.Under the condition of high casing eccentricity, the displacement efficiency improved significantly with the increase of casing speed, and when the eccentricity was 0.7, the casing speed increased from 30 r/min to 40 r/min, and the displacement efficiency increased by 1.17 percentage points; the spindle rotation changed the geometry of the expansion well section, and the displacement efficiency changed significantly when the spindle azimuth was 60-120 °, and decreased by 0.81 percentage points when the spindle azimuth increased from 60 ° to 90 °. The study results can help to improve the cementing quality of elliptical horizontal expansion well sections in shale reservoirs.
[1] 丁士东.国内外固井技术现状及发展趋势[J].钻井液与完井液,2002,19(5):35-39.
DING Shidong.Present state and developing trend of cementing technology at home and abroad[J].Drilling Fluid & Completion Fluid,2002,19(5):35-39.
[2] 敖康伟,涂思琦,杨昆鹏,等.库车山前大尺寸套管固井技术[J].石油钻探技术,2022,50(6):85-91.
AO Kangwei,TU Siqi,YANG Kunpeng,et al.Cementing technologies with large-size casing in the Kuqa Piedmont[J].Petroleum Drilling Techniques,2022,50(6):85-91.
[3] 王敬朋,张伟,吴继伟,等.呼探1井Φ139.7 mm尾管精细动态控压固井技术[J].石油钻探技术,2022,50(6):92-97.
WANG Jingpeng,ZHANG Wei,WU Jiwei,et al.Precise dynamic managed-pressure cementing technologies for Φ139.7 mm liner cementing in Well Hutan-1[J].Petroleum Drilling Techniques,2022,50(6):92-97.
[4] 韩烈祥,向兴华.水平井固井技术新进展[J].天然气工业,2007,27(12):86-88.
HAN Liexiang,XIANG Xinghua.New advancement on cementing techniques in horizontal drilling[J].Natural Gas Industry,2007,27(12):86-88.
[5] BANNISTER C E.Pipe flow rheometry:rheological analysis of a turbulent flow system used for cement placement[C].SPE10216-MS,1981:1-7.
[6] 王建云,张红卫,邹书强,等.顺北油气田低压易漏层泡沫水泥浆固井技术[J].石油钻探技术,2022,50(4):25-30.
WANG Jianyun,ZHANG Hongwei,ZOU Shuqiang,et al.Foamed cement slurry cementing technology for low-pressure and leakage-prone layers of the Shunbei Oil & Gas Field[J].Petroleum Drilling Techniques,2022,50(4):25-30.
[7] 李静.非牛顿流体顶替机理研究综述[J].钻井液与完井液,2009,26(1):75-77.
LI Jing.An overview of studies of the mechanism of non-newtonian fluids displacement[J].Drilling Fluid & Completion Fluid,2009,26(1):75-77.
[8] 丁士东,刘奎,刘小刚,等.环空加压固井对双层套管水泥环界面径向应力的影响[J].石油钻探技术,2022,50(1):30-37.
DING Shidong,LIU Kui,LIU Xiaogang,et al.The effect of pre-applied annulus back pressure cementing on radial stress of interfaces in double layer casing systems[J].Petroleum Drilling Techniques,2022,50(1):30-37.
[9] 周仕明,李根生,方春飞.元坝地区Φ146.1 mm尾管固井技术难点与对策[J].石油钻探技术,2010,38(4):41-44.
ZHOU Shiming,LI Gensheng,FANG Chunfei.Difficulties and countermeasures for Φ146.1 mm liner cementing in Yuanba Area[J].Petroleum Drilling Techniques,2010,38(4):41-44.
[10] 吴天乾,宋文宇,谭凌方,等.超低密度水泥固井质量评价方法[J].石油钻探技术,2022,50(1):65-70.
WU Tianqian,SONG Wenyu,TAN Lingfang,et al.Evaluation method for cementing quality of ultra-low-density cement[J].Petroleum Drilling Techniques,2022,50(1):65-70.
[11] 谢关宝,滕春鸣,柳华杰.盐岩蠕变对水泥环气密封完整性影响规律研究[J].石油钻探技术,2022,50(2):78-84.
XIE Guanbao,TENG Chunming,LIU Huajie.Study on the influence of salt rock creep on the integrity of cement sheath gas seals[J].Petroleum Drilling Techniques,2022,50(2):78-84.
[12] 冯福平.水平井偏心环空稳定顶替界面形状研究[J].断块油气田,2015,22(1):120-125.
FENG Fuping.Research on interface shape of steady-state displacement in eccentric annulus of horizontal well[J].Fault-Block Oil & Gas Field,2015,22(1):120-125.
[13] 邵景妍.带凹陷井筒固井驱替效率的数值研究[D].西安:西安石油大学,2016.
SHAO Jingyan.Numerical study of the hollow wellbore cementing displacement efficiency[D].Xi'an:Xi'an Shiyou University,2016.
[14] 魏凯,闫振峰,张林强,等.深井井壁不规则对注水泥顶替效率的影响[J].石油钻采工艺,2020,42(6):726-730.
WEI Kai,YAN Zhenfeng,ZHANG Linqiang,et al.Influence of the irregular hole on the cement displacement efficiency in deep wells[J].Oil Drilling & Production Technology,2020,42(6):726-730.
[15] 蒋全.扩径井固井顶替效率的数值模拟研究[D].成都:西南石油大学,2018.
JIANG Quan.Research on numerical simulation of cementing displacement efficiency of expansion well[D].Chengdu:Southwest Petroleum University,2018.
[16] LIU H.Principles and applications of well logging[M].Berlin:Heidelberg:Springer Berlin Heidelberg,2017:116-118.
[17] ADNOY B S,LOOYEH R.Petroleum rock mechanics:drilling operations and well design[M].Houston:Texas:Gulf professional publishing,2019:48-53.
[18] RENTERIA A.Effects of wellbore irregularity on primary cementing of horizontal wells,part 1:large scale effects[J].Journal of Petroleum Science and Engineering,2022,208(4):1-17.
[19] 李邦华,黎峰,晋文菊,等.边界层网格尺度对高效舵水动力数值计算的影响[J].舰船科学技术,2020,42(3):25-28.
LI Banghua,LI Feng,JIN Wenju,et al.Research on impact of boundary layer grid scale in hydrodynamic performance computation of high effectiveness rudder[J].Ship Science and Technology,2020,42(3):25-28.
[20] 刘崇建.油气井注水泥理论与应用[M].北京:石油工业出版社,2001:255-262.
LIU Chongjian.Theories and applications of oil and gas well cementing[M].Beijing:Petroleum Industry Press,2001:255-262.
[21] LIU Kai,DENG Jianqiang,YE Fanghua.Numerical simulation of flow structures in a rotary type energy recovery device[J].Desalination,2019,449(1):101-110.
[22] RENTERIA A,SARMADI P,FRIGAARD I.Cementing irregular horizontal wellbores[C].OMAE2021-63517,2021:1-10.
[23] SARMADI P,RENTERIA A,THOMPSON C,et al.Effects of wellbore irregularity on primary cementing of horizontal wells,part 2:small scale effects[J].Journal of Petroleum Science and Engineering,2022,210(7):1-20.
辽公网安备 21110002000031号 辽ICP备18011648号-1
