海上超浅层气藏长水平井低密度砾石充填技术方案研究  

Research on low-density gravel packing technique for long horizontal wells in ultra-shallow gas reservoir

作　　者：孟文波 周生田[2] 蒋东雷 徐斐 董钊 杨蕾[2] 刁欢 任冠龙 张健 MENG Wenbo;ZHOU Shengtian;JIANG Donglei;XU Fei;DONG Zhao;YANG Lei;DIAO Huan;REN Guanlong;ZHANG Jian(CNOOC China Limited,Zhanjiang Branch,Zhanjiang,Guangdong 524057,China;China University of Petroleum,Qingdao,Shandong 266580,China)

机构地区：[1]中海石油(中国)有限公司湛江分公司,广东湛江524057 [2]中国石油大学(华东),山东青岛266580

出　　处：《中国海上油气》2019年第3期147-151,共5页China Offshore Oil and Gas

基　　金：中海石油(中国)有限公司科研项目“乐东气田超浅层长水平井砾石充填防砂技术研究(编号:CCL2017ZJFN0016)”;中央高校基本科研业务费专项“多尺度孔隙煤层气运移模拟中的混合有限元方法研究(编号:15CX05065A)”“特低渗油藏压裂水平井分段完井优化研究(编号:16CX02012A)”部分研究成果

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.

关 键 词：长水平井 低密度砾石充填 多重β波充填 模拟计算 乐东22-1气田 

分 类 号：TE257.3[石油与天然气工程—油气井工程]