Technical difficulties and breakthroughs in drilling horizontal wells in shallow and ultra-low permeability reservoirs

doi:10.3969/j.issn.1672-7703.2017.05.002

Abstract

Abstract: Eastern Yanchang oilfields, production using conventional wells(which have already been more)caused problems of low productivity and low efficiency in shallow,low-pressure,low-permeability and ultra-low permeability reservoirs. However, it is difficult to drill horizontal wells in such reservoirs (at low temperature, low pressure and shallow depth). To solve these problems, supporting techniques for drilling and completion of extended-reach horizontal wells were studied and applied in shallow and ultra-shallow layers. The innovative combination of "arcual" horizontal well with shallow fracture network in shallow and low-pressure reservoirs where horizontal fractures are easily induced by fracturing stimulation increased more producing reserves by at least 30% than conventional drilling method in a horizontal section, obtaining effective production of reservoirs with low vertical stress. The collaborative optimization design of well trajectory and well profile, low-cost pressuring, casing optimization, increase of the axial pressure and transmission efficiency of drilling string were applied and created successful construction of many horizontal wells in very complicated conditions. This study provides solid technical support for improving the development of shallow and ultra-low permeability reservoirs in eastern Yanchang oilfields with more economic and social benefits.

Key words: low-permeability reservoir, Ordos Basin, extended-reachhorizontal well in super-shallow layers, shallow reservoir

CLC Number:

TE243.2

Hao Shiyan, Li Weifeng, Guo Chunfen. Technical difficulties and breakthroughs in drilling horizontal wells in shallow and ultra-low permeability reservoirs[J]. China Petroleum Exploration, 2017, 22(5): 15-20.

References

[1] 付金华,喻建,徐黎明,牛小兵,冯胜斌,王秀娟,等.鄂尔多斯盆地致密油勘探开发新进展及规模富集可开发主控因素[J].中国石油勘探,2015,20(5):9-19. Fu Jinhua, Yu Jian, Xu Liming, Niu Xiaobing, Feng Shengbin, Wang Xiujuan, et al. New progress in exploration and development of tight oil in Ordos Basin and main controlling factors of largescale enrichment and exploitable capacity[J]. China Petroleum Exploration, 2015,20(5):9-19.
[2] 葛云锦,贺永红,焦健,宋健,贾乐平.鄂尔多斯盆地周长地区长9油层组浊积岩及致密油勘探意义[J].中国石油勘探,2015,20(4):30-36. Ge Yunjin, He Yonghong, Jiao Jian, Song Jian,Jia Leping.Tight oil exploration of Chang 9 turbidity in Zhouchang area of Ordos Basin[J]. China Petroleum Exploration, 2015,20(4):30-36.
[3] 曹跃,银晓,赵谦平,王冠男.鄂尔多斯盆地南部延长探区上古生界烃源岩特征与勘探方向[J].中国石油勘探,2015,20(3):13-21. Cao Yue, Yin Xiao, Zhao Qianping, Wang Guannan. Characteristics and exploration direction of Upper Paleozoic source rock in Yanchang block of southern Ordos Basin[J].China Petroleum Exploration, 2015,20(3):13-21.
[4] 徐蕾,师永民,徐常胜,杨悦,李宏,柴智.长石族矿物对致密油储渗条件的影响——以鄂尔多斯盆地长6油层组为例[J].石油勘探与开发,2013,40(4):448-454. Xu Lei, Shi Yongmin, Xu Changsheng, Yang Yue, Li Hong, Chai Zhi. Effects of feldspar mineral on the storage conditions of dense oil-a case study of Chang 6 soil group in Ordos Basin[J]. Petroleum Exploration and Development, 2013,40(4):448-454.
[5] 郭德运.鄂尔多斯盆地东部上古生界沉积体系研究[D].西安:西北大学,2009. Guo Deyun. The study on upper Paleozoic sedimentary system in the eastern of Ordos Basin[D]. Xi'an:Northwest University, 2009.
[6] 李伟峰,于小龙.延长东部超浅层大位移水平井钻井技术难点与对策[J].非常规油气,2017,4(1):100-103. Li Weifeng, Yu Xiaolong. Difficulties and countermeasures of extending drilling technology of large shallow horizontal well in east of Yan-chang oil field[J]. Unconventional Oil and Gas, 2017,4(1):100-103.
[7] 吴少波.鄂尔多斯盆地东部延长油区上三叠统延长组高分辨率层序地层与储层研究[D].西安:西北大学,2007. Wu Shaobo. The study on high-resolution sequence stratigraphy and reservoirs of the upper Triassic Yan-chang Formation in the eastern oil field Ordos Basin[D]. Xi'an:Northwest University, 2007.
[8] 李伟峰,王艳,苏丹丹,余海棠,姬万荣.基于水动力能量分析确定有利沉积微相带分布研究[J].地球物理学进展,2012,27(1):225-231. Li Weifeng, Wang Yan, Su Dandan, Yu Haitang, Ji Wanrong. The study on the distribution of favorable deposition microfacies based on hydrodynamic energy analysis[J]. Advances in Geophysics, 2012,27(1):225-231.
[9] 吴昊.大位移水平井段旋转稳斜钻井系统的研究[D].西安:西安石油大学,2016. Wu Hao. The study on rotating straightening drilling system with large displacement horizontal well[D]. Xi'an:Xi'an University of Petroleum, 2016.
[10] 谈心.致密砂岩油气藏水平井压裂增产方法与技术研究[D].北京:中国地质大学(北京),2016. Tan Xin. The study on fracturing method and technology of horizontal well fracture in tight sandstone reservoir[D]. Beijing:China University of Geosciences (Beijing), 2016.
[11] 王海东,唐凯,欧跃强,鄢杨,张良,张清彬.大通径桥塞与可溶球技术在页岩气X井的应用[J].石油矿场机械,2016,45(4):78-81. Wang Haidong, Tang Kai, Ou Yueqiang, Yan Yang, Zhang Liang, Zhang Qingbin. Application of large diameter bridge plug and soluble ball technique in shale gas X well[J]. Oilfield Machinery, 2016,45(4):78-81.
[12] 杨国彬,杨华,吴萌,陈雷,张洪良.浅层大位移三维水平井钻井技术在超重稠油油田的应用[J]. 钻采工艺,2016,39(1):26-29. Yang Guobin, Yang Hua, Wu Meng, Chen Lei, Zhang Hongliang. Application of horizontal large displacement three dimensional horizontal well drilling technology in super heavy and geavy oilfield[J]. Drilling and Production Technology, 2016,39(1):26-29.
[13] 邓红琳,王锦昌.超浅层大位移水平井钻完井技术[J].特种油气藏,2014,21(3):142-144. Deng Honglin, Wang Jinchang. Drilling and completion technology for super shallow layer large displacement horizontal well[J]. Special Oil & Gas Reservoirs, 2014,21(3):142-144.
[14] 张程光,吴千里,王孝亮,吕宁.塔里木深井薄油层旋转地质导向钻井技术应用[J]. 石油勘探与开发,2013,40(6):747-751. Zhang Chengguang, Wu Qianli, Wang Xiaoliang, Lü Ning. Application of rotary geosteering drilling in deep and thin reservoirs of Tarim Basin[J]. Petroleum Exploration and Development, 2013,40(6):747-751.
[15] 姜伟,蒋世全,付鑫生,陈平.旋转导向钻井技术应用研究及其进展[J].天然气工业,2013,33(4):75-79. Jiang Wei, Jiang Shiquan, Fu Xinsheng, Chen Ping. Application of rotary steering drilling technology and its research progress[J]. Natural Gas Industry, 2013,33(4):75-79.
[16] 陈志明,廖新维,赵晓亮,窦祥骥,祝浪涛.低渗透致密气藏水平井探测半径研究[J]. 特种油气藏,2015,22(5):90-94. Chen Zhiming, Liao Xinwei, Zhao Xiaoliang, Dou Xiangji, Zhu Langtao. Investigation radius of horizontal well in low-permeability tight gas reservoir[J]. Special Oil & Gas Reservoirs, 2015,22(5):90-94.
[17] 檀朝东,闫学峰,杨喜柱,杨怡衡.大位移水平井完井管柱力学分析研究[J].石油矿场机械,2008,37(2):20-24. Tan Chaodong, Yan Xuefeng, Yang Xizhu, Yang Yiheng. The study on mechanical analysis of completion of large displacement horizontal well completion[J]. Oilfield Machinery, 2008,37(2):20-24.
[18] 徐天用,裴道中,黄立新,严忠.大位移水平井常见问题机理分析及对策[J].钻采工艺,2001,24(5):22-25. Xu Tianyong, Pei Daozhong, Huang Lixin, Yan Zhong. Analysis and countermeasure of common problem mechanism of large displacement horizontal well[J]. Drilling and Production Technology, 2001,24(5):22-25.
[19] 尹洪军,赵二猛,李兴科,孙超,陈叙生.致密油藏分段压裂水平井合理试采方式研究[J].特种油气藏,2016,23(3):79-82. Yin Hongjun, Zhao Ermeng, Li Xingke, Sun Chao, Chen Xusheng.Reasonable production test of multi-stage fractured horizontal well in tight oil reservoir[J]. Special Oil & Gas Reservoirs, 2016,23(3):79-82.
[20] 李文明,向刚,王安泰,刘湘华,刘相兴.苏里格气田大位移水平井钻井液技术[J]. 石油钻采工艺,2012,34(3):33-35. Li Wenming, Xiang Gang, Wang Antai, Liu Xianghua, Liu Xiangxing. Drilling fluid technology for large displacement horizontal well in sulige gas field[J]. Oil Drilling & Production Technology, 2012,34(3):33-35.
[21] 郭晓霞,杨金华,钟新荣.北美致密油钻井技术现状及对我国的启示[J].石油钻采工艺,2014,36(4):1-5. Guo Xiaoxia, Yang Jinhua, Zhong Xinrong. The status of tight oil drilling technique in North America and its enlightenment to China[J]. Oil Drilling & Production Technology, 2014,36(4):1-5.
[22] 钱峰,杨立军.三塘湖致密油长水平段水平井钻井技术[J].石油钻采工艺,2014,36(6):20-23. Qian Feng, Yang Lijun. Drilling technology for horizontal well with long horizontal section in Santanghu tight oil reservoir[J].Oil Drilling & Production Technology, 2014,36(2):20-23.
[23] 邹大鹏.大庆油田致密油水平井强抑制防塌水基钻井液技术[J].石油钻采工艺,2015,37(3):36-39. Zou Dapeng. High inhibition and anti-sloughing water-based drilling fluid technology for horizontal wells in tight oil reservoirs in Daqing oilfield[J]. Oil Drilling & Production Technology, 2015,37(2):36-39.
[24] 蔡长立,赵国良,王益山.尾管碰压工艺在深井尾管固井中的实践[J].石油钻采工艺,1998,20(2):39-41. Cai Changli,Zhao Guoliang,Wang Yishan.Practice of set plug technology in deep well drilling liner cementing[J]. Oil Drilling & Production Technology, 1998,20(2):39-41.
[25] 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(2):40-43.