深层页岩气套损井全通径无级滑套水平井分段压裂投产技术——以WY9-2HF井为例

doi:10.13809/j.cnki.cn32-1825/te.2021.02.011

摘要/Abstract

摘要：

页岩气尤其是深层页岩气水平井套损一直是困扰页岩气分段压裂开发的难题,常规的套管补贴、化学封堵等方法无法同时满足页岩气高压裂压力、大排量施工和小桥塞通过,导致页岩气常规泵送桥塞分段工艺难以实施;而采用常规多封隔器分段工艺,由于投球滑套极差限制,分段数、排量受限,难以满足页岩气压裂排量、规模等要求。针对深层页岩气井WY9-2HF套损问题,通过风险论证、管柱力学分析及结构优化、工具研发与改进、井筒模拟试验等研究,采用悬挂封隔器管柱隔离套管破损井段,通过上部套管注入结合下部油管注入方式以提高排量;采用全通径无级滑套,增加分段级数同时提高施工排量,配套多封隔器下入工艺、套损井井控安全措施、大排量分段压裂工艺,在WY9-2HF页岩气井实现大排量、大规模31级分段压裂,达到预期压裂目标,获投产日产气8.75×10⁴ m³/d,该技术对类似页岩气套损井分段压裂投产具有借鉴意义。

关键词: 页岩气, 套损, 全通径, 无级滑套, 悬挂封隔器

Abstract:

The casing damage of horizontal wells for shale gas, especially for deep shale gas, has always been a problem that troubles the staged fracturing development of shale gas. The conventional methods, such as casing patching and chemical plugging, cannot simultaneously meet the demands of high pressure, high flow rate and small bridge plug passing during fracturing, resulting in the difficult implementation of the staged fracturing technology through pumping of bridge plugs. Besides, the staged fracturing technology with multi-packer is difficult to meet the requirements of pumping rate and scale due to the limited number of segments and limited displacement, resulting from the limited range of the ball-drop sliding sleeve. Taking Well-WY9-2HF as an example, by conducting the researches such as risk demonstration, pipe string mechanical analysis and structural optimization, tool development and improvement, and wellbore simulation test, the following conclusions are drawn: the string with suspension packer is suitable for isolating the casing-damaged sections; the combination of the upper casing and the lower tubing for injection can raise the pump rate; the full bore infinite sliding sleeve can increase the number of segments and the pump rate; together with multi-packer, well control safety measures and high-rate segmented fracturing technique, the full bore infinite sliding sleeve is used to realize a large-scale and high-rate fracturing with 31 stages in Well-WY9-2HF, which achieves the expected targets and obtains a commissioning production of 8.75×10⁴ m³/d. This technology can be used as a reference for the fracturing and commissioning of such wells.

Key words: shale gas, casing damage, full bore, infinite sliding sleeve, suspension packer

中图分类号:

TE357

龙刚,薛丽娜,杨晓莉. 深层页岩气套损井全通径无级滑套水平井分段压裂投产技术——以WY9-2HF井为例[J]. 油气藏评价与开发, 2021, 11(2): 219-222.

LONG Gang,XUE Lina,YANG Xiaoli. Staged fracturing technology with full bore infinite sliding sleeve of casing-damaged horizontal wells for deep shale gas: A case study of Well-WY9-2HF[J]. Reservoir Evaluation and Development, 2021, 11(2): 219-222.

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参考文献 20

[1]	田中兰, 石林, 乔磊. 页岩气水平井井筒完整性问题及对策[J]. 天然气工业, 2015,35(9):70-76.
	TIAN Zhonglan, SHI Lin, QIAO Lei. Research of and countermeasure for wellbore integrity of shale gas horizontal well[J]. Natural Gas Industry, 2015,35(9):70-76.
[2]	SUGDEN C, JOHNSON J, CHAMBER M, et al. Special consideration in the design optimization of the production casing in high-rate, multistage-fractured shale wells[J]. SPE Drilling and Completion, 2012,27(4):459-472.
[3]	BARREDA D, SHAHRI M P, WAGNER R, et al. Impact of cyclic pressure loading on well integrity in multi-stage hydraulic fracturing[C]// paper URTEC-2902463-MS presented at the SPE/AAPG/SEG Unconventional Resources Technology Conference, July 23-25, 2018, Houston, Texas, USA.
[4]	ADAMS N J, MITCHELL R F, EUSTES A W, et al. A causation investigation for observed casing failures occurring during fracturing operations[C]// paper SPE-184868-MS presented at the SPE Hydraulic Fracturing Technology Conference and Exhibition, January 24-26, 2017, The Woodlands, Texas, USA.
[5]	杨毅, 刘俊辰, 曾波, 等. 页岩气井套变段体积压裂技术应用及优选[J]. 石油机械, 2017,45(12):82-87.
	YANG Yi, LIU Junchen, ZENG Bo, et al. Application and optimization of srv fracturing technology for casing deformation section of shale gas well[J]. China Petroleum Machinery, 2017,45(12):82-87.
[6]	廖仕孟, 桑宇, 宋毅, 等. 页岩气水平井套管变形影响段分段压裂工艺研究及现场试验[J]. 天然气工业, 2017,37(7):40-45.
	LIAO Shimeng, SANG Yu, SONG Yi, et al. Research and field tests of staged fracturing technology for casing deformation section in horizontal shale gas wells[J]. Natural Gas Industry, 2017,37(7):40-45.
[7]	郑瑞, 杜建平, 李兆丰, 等. 页岩气水平井修井工艺技术应用[J]. 化工管理, 2019,(25):207-208.
	ZHENG Rui, DU Jianping, LI Zhaofeng, et al. Application of horizontal well workover technology for shale gas[J]. Chemical Industry Management, 2019, (25):207-208.
[8]	刘合, 孟思炜, 苏健, 等. 对中国页岩气压裂工程技术发展和工程管理的思考与建议[J]. 天然气工业, 2019,39(4):1-7.
	LIU He, MENG Siwei, SU Jian, et al. Reflections and Suggestions on technology development and engineering management of Shale gas fracturing in China[J]. Natural Gas Industry, 2019,39(4):1-7.
[9]	CAO X J, WANG M G, KANG J, et al. Fracturing technologies of deep shale gas horizontal wells in the Weirong Block, southern Sichuan Basin[J]. Natural Gas Industry B, 2020,7(1):64-70.
[10]	张瑞典, 吕永科, 闫亚蕾. 喷砂射孔砂塞分段压裂工艺技术应用[J]. 化学工程与装备, 2019,(7):63-69.
	ZHANG Ruidian, LYU Yongke, YAN Yalei. Application of sand blasting perforation sand plug fracturing technology[J]. Chemical Engineering and Equipment, 2019, (7):63-69.
[11]	李军龙, 李德旗, 朱炬辉, 等. 复杂页岩气井无限级砂塞分段压裂先导性试验[J]. 石油钻采工艺, 2017,39(5):633-637.
	LI Junlong, LI Deqi, ZHU Juhui, et al. Pilot test on infinite-order sand plug staged fracturing of complex shale gas wells[J]. Oil Drilling & Production Technology, 2017,39(5):633-637.
[12]	肖勇军, 何先君, 刘望, 等. 裂缝暂堵—控藏体积压裂技术在长宁区块的应用[J]. 钻采工艺, 2020,43(4):39-42.
	XIAO Yongjun, HE Xianjun, LIU Wang, et al. Application of fissure temporary plugging-controlled reservoir volume fracturing technology in Changning block[J]. Drilling & Production Technology, 2020, 43(4):39-42.
[13]	梁兴, 朱炬辉, 石孝志, 等. 缝内填砂暂堵分段体积压裂技术在页岩气水平井中的应用[J]. 天然气工业, 2017,37(1):82-89.
	LIANG Xing, ZHU Juhui, SHI Xiaozhi, et al. Staged fracturing of horizontal shale gas wells with temporary pluggingby sand filling[J]. Natural Gas Industry, 2017,37(1):82-89.
[14]	郭建春, 赵志红, 赵金洲, 等. 水平井投球分段压裂技术及现场应用[J]. 石油钻采工艺, 2009,31(6):86-88.
	GUO Jianchun, ZHAO Zhihong, ZHAO Jinzhou, et al. Horizontal well ball staged fracturing technique and field application[J]. Oil Drilling & Production Technology, 2009,31(6):86-88
[15]	肖晖, 李洁, 曾俊. 投球压裂堵塞球运动方程研究[J]. 西南石油大学学报:自然科学版, 2011,33(5):162-167.
	XIAO Hui, LI Jie, ZENG Jun. Study on ball motion equation with ball fracturing and plugging[J]. Journal of Southwest Petroleum University(Science and Technology Edition), 2011,33(5):162-167.
[16]	王兴文, 杨建英, 任山, 等. 堵塞球选择性分层压裂排量控制技术研究[J]. 钻采工艺, 2007,30(1):75– 76.
	WANG Xingwen, YANG Jianying, REN Shan, et al. Study on control technology of selective stratified fracturing for blocking ball[J]. Drilling & Production Technology, 2007,30(1):75-76.
[17]	胡顺渠, 戚斌, 侯治民, 等. 全通径无级滑套研制及应用[J]. 钻采工艺, 2018,41(4):73-76.
	HU Shunqu, QI Bin, HOU Zhimin, et al. Development and application of full size stepless sliding sleeve[J]. Drilling & Production Technology, 2018,41(4):73-76.
[18]	刘涛, 侯治民, 胡顺渠, 等. 水平井用不限级压裂滑套研制及应用[J]. 石油矿场机械, 2016, 45(9):75-77.
	LIU Tao, HOU Zhimin, HU Shunqu, et al. Development and application of open-ended fracturing sleeves for horizontal wells[J]. Oil Field Machinery, 2016,45(9):75-77.
[19]	刘洪涛, 沈新普, 刘爽, 等. 高温高压气井多封隔器管柱完整性分析方法及应用实例[J]. 天然气工业, 2020,40(7):89-89.
	LIU Hongtao, SHEN Xinpu, LIU Shuang, et al. Integrity analysis method of multi-packer string in HTHP gas wells and its application cases[J]. Natural Gas Industry, 2020,40(7):89-89.
[20]	HASAN R, IZGEC B, KABIR S. Sustaining production by managing annular-pressure buildup[J]. SPE Production & Operations, 2010,25(2):195-203.

工艺对比		排量（m³/min）	液量（m³）	砂量（m³）
泵送桥塞单簇	设计	4 ~ 5.3	1 133.3 ~ 1 246.7	19.4~22.87
封隔器分段单段	实际	4 ~ 6.0	927.8 ~ 1 558.3	36.1~83.50