LU Baoping, DING Shidong. New Progress and Development Prospect in Shale Gas Engineering Technologies of Sinopec[J]. Petroleum Drilling Techniques, 2018, 46(1): 1-9. DOI: 10.11911/syztjs.2018001
Citation: LU Baoping, DING Shidong. New Progress and Development Prospect in Shale Gas Engineering Technologies of Sinopec[J]. Petroleum Drilling Techniques, 2018, 46(1): 1-9. DOI: 10.11911/syztjs.2018001

New Progress and Development Prospect in Shale Gas Engineering Technologies of Sinopec

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  • Received Date: January 17, 2018
  • Aiming at the effective development of deep shale gas reservoirs and those with normal pressure gradient,Sinopec has made breakthroughs in a series of techniques based on its continuous upgrading of engineering technology chain for middle-deep shale gas.Those techniques include geology and engineering integral design based on the sweet spot evaluation,detailed formation evaluation while drilling,optimum and fast drilling,novel oil-based drilling fluid,novel elastic and tough cement slurry and foam cement slurry,new techniques for stimulated reservoir volume,new staged fracturing tools,high-efficiency fracturing fluid system,shale gas testing and productivity evaluation and manufacturing of large-scale fracturing unit,which have primarily established the engineering technology chain in the development of deep shale reservoirs and those with normal pressure gradient and provided powerful support in the productivity construction of Fuling Shale Gas Field and the development of deep shale reservoirs and those with normal pressure gradient.This paper summarizes the latest progresses in shale gas engineering technologies of Sinopec,and in combination with the exploration and development tendency of shale gas reservoirs in China,puts forward the development path in improving the engineering technology chain for middle-deep shale gas reservoirs,setting up the engineering technology chain for deep shale gas reservoirs,and developing the engineering technology chain for shale gas reservoirs with normal pressure gradient.
  • [1]
    路保平.中国石化页岩气工程技术进步及展望[J].石油钻探技术,2013,41(5):1-8. LU Baoping.Sinopec engineering technical advance and its developing tendency in shale gas[J].Petroleum Drilling Techniques,2013,41(5):1-8.
    [2]
    张映红,路保平.世界能源趋势预测及能源技术革命特征分析[J].天然气工业,2015,35(10):1-10. ZHANG Yinghong,LU Baoping.Prediction of global energy trend and analysis on energy technology innovation characteristics[J].Natural Gas Industry,2015,35(10):1-10.
    [3]
    曾义金.页岩气开发的地质与工程一体化技术[J].石油钻探技术,2014,42(1):1-6. ZENG Yijin.Integration technology of geology engineering for shale gas development[J].Petroleum Drilling Techniques,2014,42(1):1-6.
    [4]
    黄进,吴雷泽,游园,等.涪陵页岩气水平井工程甜点评价与应用[J].石油钻探技术,2016,44(3):16-20. HUANG Jin,WU Leize,YOU Yuan,et al.The evaluation and application of engineering sweet spots in a horizontal well in the Fuling shale gas reservoir[J].Petroleum Drilling Techniques,2016,44(3):16-20.
    [5]
    牛新明.涪陵页岩气田钻井技术难点及对策[J].石油钻探技术,2014,42(4):1-6. NIU Xinming.Drilling technology challenges and resolutions in Fuling Shale Gas Field[J].Petroleum Drilling Techniques,2014,42(4):1-6.
    [6]
    张金成,艾军,臧艳彬,等.涪陵页岩气田"井工厂"技术[J].石油钻探技术,2016,44(3):9-13. ZHANG Jincheng,AI Jun,ZANG Yanbin,et al.Multi-well pad technology in the Fuling Shale Gas Field[J].Petroleum Drilling Techniques,2016,44(3):9-15.
    [7]
    艾军,张金成,臧艳彬,等.涪陵页岩气田钻井关键技术[J].石油钻探技术,2014,42(5):9-15. AI Jun,ZHANG Jincheng,ZANG Yanbin,et al.The key drilling technologies in Fuling Shale Gas Field[J].Petroleum Drilling Techniques,2014,42(5):9-15.
    [8]
    王显光,李雄,林永学.页岩水平井用高性能油基钻井液研究与应用[J].石油钻探技术,2013,41(2):17-22. WANG Xianguang,LI Xiong,LIN Yongxue.Research and application of high performance oil base drilling fluid for shale horizontal wells[J].Petroleum Drilling Techniques,2013,41(2):17-22.
    [9]
    林永学,王显光.中国石化页岩气油基钻井液技术进展与思考[J].石油钻探技术,2014,42(4):7-13. LIN Yongxue,WANG Xianguang.Development and reflection of oil-based drilling fluid technology for shale gas of Sinopec[J].Petroleum Drilling Techniques,2014,42(4):7-13.
    [10]
    林永学,王显光,李荣府.页岩气水平井低油水比油基钻井液研制及应用[J].石油钻探技术,2016,44(2):28-33. LIN Yongxue,WANG Xianguang,LI Rongfu.Development of oil-based drilling fluid with low oil-water ratio and its application to drilling horizontal shale gas wells[J].Petroleum Drilling Techniques,2016,44(2):28-33.
    [11]
    李胜,夏柏如,林永学,等.焦页54-3HF井低油水比油基钻井液技术[J].石油钻探技术,2017,45(1):51-56. LI Sheng,XIA Boru,LIN Yongxue,et al.Oil-based mud with low oil/water ratio for Well Jiaoye 54-3HF[J].Petroleum Drilling Techniques,2017,45(1):51-56.
    [12]
    刘伟,陶谦,丁士东.页岩气水平井固井技术难点分析与对策[J].石油钻采工艺,2012,34(3):40-43. LIU Wei,TAO Qian,DING Shidong.Difficulties and countermeasures for cementing technology of shale gas horizontal well[J].Oil Drilling Production Technology,2012,34(3):40-43.
    [13]
    谭春勤,刘伟,丁士东,等.SFP弹韧性水泥浆体系在页岩气井中的应用[J].石油钻探技术,2011,39(3):53-56. TAN Chunqin,LIU Wei,DING Shidong,et al.Application of SFP elasto-toughness slurry in shale gas well[J].Petroleum Drilling Techniques,2011,39(3):53-56.
    [14]
    吴事难,张金龙,丁士东,等.井下泡沫水泥浆密度计算模型修正[J].石油钻探技术,2013,41(2):28-33. WU Shinan,ZHANG Jinlong,DING Shidong,et al.Revision of mathematical model of foamed cement slurry density under down-hole conditions[J].Petroleum Drilling Techniques,2013,41(2):28-33.
    [15]
    肖京男,刘建,桑来玉,等.充气泡沫水泥浆固井技术在焦页9井的应用[J].断块油气田,2016,23(6):835-837. XIAO Jingnan,LIU Jian,SANG Laiyu,et al.Application of foamed cement slurry to Jiaoye-9 Well[J].Fault-Block Oil Gas Field,2016,23(6):835-837.
    [16]
    蒋廷学,卞晓冰.页岩气储层评价新技术:甜度评价方法[J].石油钻探技术,2016,44(4):1-6. JIANG Tingxue,BIAN Xiaobing.The novel technology of shale gas play evaluation:sweetness calculation method[J].Petroleum Drilling Techniques,2016,44(4):1-6.
    [17]
    JIANG Tingxue,ZHOU Dehua,JIA Changgui,et al.The study and application of multi-stage fracturing technology of horizontal wells to maximize ESRV in the exploration development of Fuling shale gas play[R].SPE 181797,2017.
    [18]
    张旭,蒋廷学,贾长贵,等.页岩气储层水力压裂物理模拟试验研究[J].石油钻探技术,2013,41(2):70-74. ZHANG Xu,JIANG Tingxue,JIA Changgui,et al.Physical simulation of hydraulic fracturing of shale gas reservoir[J].Petroleum Drilling Techniques,2013,41(2):70-74.
    [19]
    蒋廷学,卞晓冰,苏瑗,等.页岩可压性指数评价新方法及应用[J].石油钻探技术,2014,42(5):16-20. JIANG Tingxue,BIAN Xiaobing,SU Yuan,et al.A new method for evaluating shale fracability index and its application[J].Petroleum Drilling Techniques,2014,42(5):16-20.
    [20]
    卞晓冰,蒋廷学,卫然,等.常压页岩气水平井压后排采控制参数优化[J].大庆石油地质与开发,2016,35(5):170-174. BIAN Xiaobing,JIANG Tingxue,WEI Ran,et al.Optimization of the controlling parameters of the post-frac flowback and production for normal-pressure shale-gas horizontal wells[J].Petroleum Geology Oilfield Development in Daqing,2016,35(5):170-174.
    [21]
    蒋廷学,卞晓冰,王海涛,等.深层页岩气水平井体积压裂技术[J].天然气工业,2017,37(1):90-96. JIANG Tingxue,BIAN Xiaobing,WANG Haitao,et al.Volume fracturing of deep shale gas horizontal wells[J].Natural Gas Industry,2017,37(1):90-96.
    [22]
    秦金立,吴姬昊,崔晓杰,等.裸眼分段压裂投球式滑套球座关键技术研究[J].石油钻探技术,2014,42(5):52-56. QIN Jinli,WU Jihao,CUI Xiaojie,et al.Key technology on ball-activated sleeve for open hole staged fracturing[J].Petroleum Drilling Techniques,2014,42(5):52-56.
    [23]
    秦金立,陈作,杨同玉,等.鄂尔多斯盆地水平井多级滑套分段压裂技术[J].石油钻探技术,2015,43(1):7-12. QIN Jinli,CHEN Zuo,YANG Tongyu,et al.Technology of staged fracturing with multi-stage sleeves for horizontal wells in the Ordos Basin[J].Petroleum Drilling Techniques,2015,43(1):7-12.
    [24]
    何同,彭汉修,吴晓明,等.全复合材料易钻桥塞研制与应用[J].特种油气藏,2017,24(4):166-170. HE Tong,PENG Hanxiu,WU Xiaoming,et al.Development and application of drillable bridge plugs made by composite materials[J].Special Oil Gas Reservoirs,2017,24(4):166-170.
    [25]
    曹海燕,冯波,苏腾飞,等.易钻桥塞的研制与室内试验[J].石油机械,2016,44(6):78-82. CAO Haiyan,FENG Bo,SU Tengfei,et al.Development and laboratory tests of easy drillable bridge plug[J].China Petroleum Machinery,2016,44(6):78-82.
    [26]
    杨德锴.全通径滑套球座打捞机构关键技术研究[J].石油钻探技术,2017,45(4):75-80. YANG Dekai.Key technology on ball seat fishing mechanism of full bore size sleeves[J].Petroleum Drilling Techniques,2017,45(4):75-80.
    [27]
    赵传伟,李云,李国锋,等.基于Taguchi方法的计数式全通径压裂滑套优化设计[J].石油钻探技术,2017,45(1):97-103. ZHAO Chuanwei,LI Yun,LI Guofeng,et al.Design optimization of full bore stimulation sleeves with ball drop counting using the Taguchi Method[J].Petroleum Drilling Techniques,2017,45(1):97-103.
    [28]
    魏辽,马兰荣,朱敏涛,等.大通径桥塞压裂用可溶解球研制及性能评价[J].石油钻探技术,2016,44(1):90-94. WEI Liao,MA Lanrong,ZHU Mintao,et al.Development and performance evaluation of dissolvable balls for large borehole bridge plug fracturing[J].Petroleum Drilling Techniques,2016,44(1):90-94.
    [29]
    魏娟明,刘建坤,杜凯,等.反相乳液型减阻剂及滑溜水体系的研发与应用[J].石油钻探技术,2015,43(1):27-32. WEI Juanming,LIU Jiankun,DU Kai,et al.The development and application of inverse emulsified friction reducer and slickwater system[J].Petroleum Drilling Techniques,2015,43(1):27-32.
    [30]
    PANG Wei,WU Qiong,HE Ying,et al.Production analysis of one shale gas reservoir in China[R].SPE 174998,2015.
    [31]
    PANG Wei,CHRISTINE A,Ehlig-Economides,et al.Effect of well interference on shale gas well SRV interpretation[R].SPE 176910,2015.
    [32]
    PANG Wei,DUAN Youzhi,YUE Hui,et al.Improvement of production data analysis method for shale gas wells[R].SPE 182480,2016.
    [33]
    DU Juan,PANG Wei,LEI Jun,et al.Pressure transient analysis of shale gas wells with non-uniform fractures[R].SPE 183724,2017.
    [34]
    PANG Wei,XIN Cuiping,DU Juan,et al.AOF analysis of one shale gas play[R].SPE 175914,2015.
    [35]
    PANG Wei,DU Juan,ZHANG Tongyi,et al.Production performance modeling of shale gas wells based on production logging[R].SPE 181398,2016.
    [36]
    PANG Wei,DI Dejia,MAO Jun,et al.Production logging of shale gas wells in China[R].SPE 181815,2016.
    [37]
    宋玉春,白腊辉,陈军.3000型成套压裂机组:引领行业新方向[J].中国石化,2016(2):62-64. SONG Yuchun,BAI Lahui,CHEN Jun.Type 3000 complete set of fracturing unit:leading the new direction of the industry[J].Sinopec Monthly,2016(2):62-64.
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    3. 王涛,申峰,杨超,王海柱,杨谋,窦倩,石鲁杰. 延长探区古生界页岩气水平井一次上返高效封隔固井技术. 非常规油气. 2023(01): 122-129 .
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    5. 盛志民,陈胜安,杨春曦,马越,王丽峰,曾从良. 新型易降解可调节暂堵剂研究与应用. 当代化工. 2023(02): 447-451 .
    6. 皮光林. 美国页岩油气产业现状及工程技术演进趋势. 当代石油石化. 2023(05): 6-9 .
    7. 张锦宏,周爱照,成海,毕研涛. 中国石化石油工程技术新进展与展望. 石油钻探技术. 2023(04): 149-158 . 本站查看
    8. 李阳,赵清民,薛兆杰. 新一代油气开发技术体系构建与创新实践. 中国石油大学学报(自然科学版). 2023(05): 45-54 .
    9. 郭亮,邹荣,王维良,涂福洪,杨静,李敏. 新疆吉木萨尔页岩油水平井钻井关键技术. 西部探矿工程. 2023(11): 46-48 .
    10. 王兴文,缪尉杰,何新星,许剑. 川南威荣气田深层页岩气工程技术进展. 石油实验地质. 2023(06): 1170-1177 .
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    12. 刘尧文,卞晓冰,李双明,蒋廷学,张驰. 基于应力反演的页岩可压性评价方法. 石油钻探技术. 2022(01): 82-88 . 本站查看
    13. 袁光杰,付利,王元,郭凯杰,陈刚. 我国非常规油气经济有效开发钻井完井技术现状与发展建议. 石油钻探技术. 2022(01): 1-12 . 本站查看
    14. 包汉勇,梁榜,郑爱维,肖佳林,刘超,刘莉. 地质工程一体化在涪陵页岩气示范区立体勘探开发中的应用. 中国石油勘探. 2022(01): 88-98 .
    15. 郑德帅. 南川地区复杂储层水平井大弯角螺杆提速技术. 石油地质与工程. 2022(02): 92-94 .
    16. 魏娟明. 滑溜水–胶液一体化压裂液研究与应用. 石油钻探技术. 2022(03): 112-118 . 本站查看
    17. 吴尤. 页岩气录井技术进展及展望. 钻探工程. 2022(05): 171-176 .
    18. 李龙,陈显举,彭安钰,吴松,迟焕鹏. 贵州正安地区常压页岩气压裂关键技术. 钻探工程. 2022(05): 189-193 .
    19. 路保平. 中国石化石油工程技术新进展与发展建议. 石油钻探技术. 2021(01): 1-10 . 本站查看
    20. 吴非. 随钻成像地层界面信息自动定量识别技术. 工业技术创新. 2021(02): 72-77 .
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    23. 唐建明,徐天吉,程冰洁,沈杰,喻勤. 四川盆地深层页岩气“甜点”预测与钻井工程辅助设计技术. 石油物探. 2021(03): 479-487 .
    24. 史怀忠,成鹏飞,穆总结,席传明. 插针式水力振荡器的研制及应用. 石油机械. 2021(11): 17-23 .
    25. 石崇东,王万庆,史配铭,杨勇. 盐池区块深层页岩气水平井钻井关键技术研究. 石油钻探技术. 2021(06): 23-28 . 本站查看
    26. 郑德帅. 可旋转钻柱定向钻进工具设计及测试. 石油钻探技术. 2021(06): 81-85 . 本站查看
    27. 黄浩勇,范宇,曾波,赵圣贤,常程. 长宁区块页岩气水平井组地质工程一体化. 科学技术与工程. 2020(01): 175-182 .
    28. 李阳,薛兆杰,程喆,蒋海军,王濡岳. 中国深层油气勘探开发进展与发展方向. 中国石油勘探. 2020(01): 45-57 .
    29. 王瑞,吴新民,马云,白海涛. 页岩气储层工作液伤害机理研究现状. 科学技术与工程. 2020(03): 867-873 .
    30. 杨灿,王鹏,饶开波,蔺玉水,李伟,叶顺友. 大港油田页岩油水平井钻井关键技术. 石油钻探技术. 2020(02): 34-41 . 本站查看
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