海上超浅层气藏长水平井低密度砾石充填技术方案研究
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摘要
针对南海乐东22-1气田长水平井砾石充填技术难点,开展了低密度砾石充填模拟计算,设计了低密度砾石-多重β波充填技术方案。模拟结果表明:注入阶段和α波充填阶段,钻柱内砂浆摩阻占比约60%～70%;β波充填阶段,摩阻主要发生在冲筛环空;砾石密度对α波充填长度影响显著,利用低密度砾石能够有效提高α波可充填长度。本文设计的低密度砾石-多重β波充填技术方案已在乐东22-1气田取得成功应用,可为长水平井低密度砾石充填提供参考。
In view of the difficulty in gravel packing technique for long horizontal wells in LD22-1 gas field in the South China Sea, this paper carried out simulated calculation for low-density gravel packing and designed a technical plan for low-density gravel-multiple β wave packing technique. The simulated calculation result shows that, in injection stage and α wave packing stage, the friction ratio of slurry in the drillpipe is about 60%～70%;in β wave packing stage, the frictional resistance mainly occurs in screen-wash pipe annulus. The gravel density has a significant impact on α-wave packing length, and that the low-density gravel packing can effectively improve the length packed by α-wave. The technical plan for low-density gravel-multiple β wave packing technique designed in this paper has been successfully used in LD22-1 gas field, which can provide a reference for low-density gravel packing in long horizontal wells.
In view of the difficulty in gravel packing technique for long horizontal wells in LD22-1 gas field in the South China Sea, this paper carried out simulated calculation for low-density gravel packing and designed a technical plan for low-density gravel-multiple β wave packing technique. The simulated calculation result shows that, in injection stage and α wave packing stage, the friction ratio of slurry in the drillpipe is about 60%～70%;in β wave packing stage, the frictional resistance mainly occurs in screen-wash pipe annulus. The gravel density has a significant impact on α-wave packing length, and that the low-density gravel packing can effectively improve the length packed by α-wave. The technical plan for low-density gravel-multiple β wave packing technique designed in this paper has been successfully used in LD22-1 gas field, which can provide a reference for low-density gravel packing in long horizontal wells.
引文
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[2] 李爱芬,杨柳.水平井砾石充填数值模拟研究[J].石油学报,2002,23(1):102-106.LI Aifen,YANG Liu.Numerical simulation study of gravel packing in horizontal well[J].Acta Petrolei Sinica,2002,23(1):102-106.
[3] 周生田,李兆敏,董长银.水平井砾石充填数值模拟研究进展[J].力学与实践,2009,31(3):9-15.ZHOU Shengtian,LI Zhaomin,DONG Changyin.The advances of numerical simulation for gravel packing in horizontal wells[J].Mechanics and Practice,2009,31(3):9-15.
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[6] 石凯月,何利民,罗小明,等.管道砂沉积与流体携砂临界速度研究进展及展望[J].中国海上油气,2018,30(3):188-196.DOI:10.11935/j.issn.1673-1506.2018.03.026.SHI Kaiyue,HE Limin,LUO Xiaoming,et al.Research progress and prospect of sand deposition and sand transportation critical velocities in pipelines[J].China Offshore Oil and Gas,2018,30(3):188-196.DOI:10.11935/j.issn.1673-1506.2018.03.026.
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[8] CHEN Z.Horizontal well gravel packing:Dynamic alpha wave dune height calculation and its impact on gravel placement job execution[R].SPE 110665,2007.
[9] 张明,李凡,刘光泽,等.自主化一趟多层砾石充填防砂技术研究与应用[J].中国海上油气,2016,28(3):111-114.DOI:10.11935/j.issn.1673-1506.2016.03.017.ZHANG Ming,LI Fan,LIU Guangze,et al.Technology of sand control with autonomous one-trip gravel packing and its application[J].China Offshore Oil and Gas,2016,28(3):111-114.DOI:10.11935/j.issn.1673-1506.2016.03.017.
[2] 李爱芬,杨柳.水平井砾石充填数值模拟研究[J].石油学报,2002,23(1):102-106.LI Aifen,YANG Liu.Numerical simulation study of gravel packing in horizontal well[J].Acta Petrolei Sinica,2002,23(1):102-106.
[3] 周生田,李兆敏,董长银.水平井砾石充填数值模拟研究进展[J].力学与实践,2009,31(3):9-15.ZHOU Shengtian,LI Zhaomin,DONG Changyin.The advances of numerical simulation for gravel packing in horizontal wells[J].Mechanics and Practice,2009,31(3):9-15.
[4] CHEN Z,NOVOTNY R J,et al.Gravel packing deep water long horizontal wells under low fracture gradient[R].SPE 90552,2004.
[5] CHEN Z.The application of light and ultra-light weight proppant in horizontal well sand control:unified model and case histories[R].SPE 147451,2012.
[6] 石凯月,何利民,罗小明,等.管道砂沉积与流体携砂临界速度研究进展及展望[J].中国海上油气,2018,30(3):188-196.DOI:10.11935/j.issn.1673-1506.2018.03.026.SHI Kaiyue,HE Limin,LUO Xiaoming,et al.Research progress and prospect of sand deposition and sand transportation critical velocities in pipelines[J].China Offshore Oil and Gas,2018,30(3):188-196.DOI:10.11935/j.issn.1673-1506.2018.03.026.
[7] MARTIN P C,GARY T C.Beta-wave pressure control enables extended-reach horizontal gravel packs[R].SPE 71668,2001.
[8] CHEN Z.Horizontal well gravel packing:Dynamic alpha wave dune height calculation and its impact on gravel placement job execution[R].SPE 110665,2007.
[9] 张明,李凡,刘光泽,等.自主化一趟多层砾石充填防砂技术研究与应用[J].中国海上油气,2016,28(3):111-114.DOI:10.11935/j.issn.1673-1506.2016.03.017.ZHANG Ming,LI Fan,LIU Guangze,et al.Technology of sand control with autonomous one-trip gravel packing and its application[J].China Offshore Oil and Gas,2016,28(3):111-114.DOI:10.11935/j.issn.1673-1506.2016.03.017.