Safe Drilling and Completion Technologies for Ultra-Long Horizontal Section of Tight Gas Horizontal Wells in Changqing Oilfield
-
摘要:
为了提高长庆气田致密气开发效益，加大部署水平段长超4 000 m的水平井，但随着水平段长度增加，面临井眼轨迹控制困难、钻井液携岩难度大、钻具起下钻摩阻大、泥页岩井壁易失稳和尾管难以下至设计井深等技术难点。为此，应用优化钻具组合及强度校核技术，以保证施工的安全性；研发高性能水基环保钻井液体系并配合井眼清洁监测技术，以实现超长水平段的安全钻进；采用破裂板悬浮器下套管技术，以确保套管下入顺利；并结合该油田的实际情况提出了具体的技术措施，形成了长庆油田致密气水平井超长水平段安全钻井完井技术。长庆油田3口致密气水平井的超长水平段应用该技术后，均顺利完井，表明其可以保证超长水平段的安全施工。长庆油田致密气水平井超长水平段安全钻井完井技术为长庆油田致密气高效开发提供了技术途径。
Abstract:In order to enhance the efficient development of tight gas, Changqing Oilfield has scaled up the deployment of horizontal wells with a horizontal section over 4 000 meters. However, with the increase of horizontal section, technical challenges are encountered, including bad well trajectory control, hard sand transportation by drilling fluids, tight hole while tripping, unstable mudstone hole section, and uneasy setting of tail pipe into designed depth. Therefore, the bottom hole assembly(BHA) optimization and strength check technologies were employed to ensure a safe operation, and a environment-friendly high-performance water-based drilling fluid system combined with the borehole cleaning and monitoring technology was developed to realize the safe drilling of ultra-long horizontal sections. The casing running technology of rupture disk levitating device was applied to ensure a smooth casing operation. Furthermore, a series of specific technical measures were proposed based on the actual situation of oilfield. Therefore, the safe drilling and complement technologies for ultra-long horizontal sections of tight gas horizontal wells in Changqing Oilfield came into being. The technologies have been applied in the ultra-long horizontal sections of 3 tight gas horizontal wells in Changqing Oilfield, with successful well completion, which showed that the technologies could effectively ensure the safe construction of ultra-long horizontal sections. The successful applications show that the technologies can provide technical mothodology for efficeent development of tight gas wells in the Changqing Oilfield.
-
-
![]()
图 1 超长水平段钻具组合抗拉强度校核结果
Figure 1. Tensile strength check results of BHA for ultra-long horizontal sections
![]()
图 2 超长水平段钻具组合抗扭强度校核结果
Figure 2. Torsional strength check results of BHA for ultra-long horizontal sections
![]()
图 3 超长水平段钻具组合屈曲分析结果
Figure 3. Buckling analysis results of BHA for ultra-long horizontal sections
![]()
图 4 套管漂浮下入及上提时的摩阻分析结果
Figure 4. Friction analysis results of floating casing during running and lifting
![]()
图 5 套管漂浮下入时的屈曲分析结果
Figure 5. Buckling analysis results of floating casing during running
![]()
图 6 漂浮下套管上提时的抗拉分析结果
Figure 6. Tensile analysis results of floating casing during lifting
表 1 超长水平段钻具组合强度校核数据
Table 1 Strength check data of BHA for ultra-long horizontal sections
工况 钻具尺寸/
mm钢级 钻压/
kN是否
屈曲抗扭强度校核/（kN·m） 抗拉强度校核/kN 最大扭矩 屈服强度 安全系数 最大钩载 抗拉强度 安全系数 倒划眼 101.6 S135 否 22.4 53.284 2.28 941.3 2 287 1.72 起钻 101.6 S135 否 1 329.2 2 287 旋转钻进 101.6 S135 50 否 23.3 53.284 891.3 2 287 下钻 101.6 S135 否 563.4 2 287 空转 101.6 S135 否 21.9 53.284 941.3 2 287 滑动钻进 101.6 S135 30 否 524.4 2 287 注：套管内摩阻系数0.20，裸眼段摩阻系数0.25。 
下载: 导出CSV
表 2 高性能水基环保钻井液体系性能
Table 2 Performance of environment-friendly high-performance water-based drilling fluid system
井号 水平段1）/m 密度/
（kg·L−1）漏斗黏度/s API滤失量/
mL高温高压
滤失量/mL塑性黏度/
（mPa·s）动塑比 黏滞系数 桃2-X井 1500～4443 1.28～1.36 60～85 2.6 8.0 37 0.54 0.055 桃X井 1500～4466 1.28～1.35 62～82 3.0 8.2 35 0.53 0.055 靖X井 1500～5256 1.28～1.38 62～86 3.0 8.2 39 0.58 0.055 注：1）1 500 m之前钻井液性能随水平段长度增大动态调整，1 500 m之后其性能基本稳定，所以从1 500 m开始进行性能分析。
下载: 导出CSV
表 3 超长水平段当量循环密度监控及处理数据
Table 3 Monitoring and processing data of equivalent circulating density for ultra-long horizontal sections
水平段长/m Δρce/（kg·L−1） 处理方式 处理后Δρce/（kg·L−1） 1 800 0.01 钻进 钻进 2 300 0.02 钻进 钻进 2 800 0.02 钻进 钻进 3 200 0.03 钻进 钻进 3 500 0.05 倒划眼循环 0.02 3 800 0.05 倒划眼循环 0.02 4 200 0.06 倒划眼循环 0.03 4 400 0.06 倒划眼循环 0.03 4 800 0.06 倒划眼循环 0.04 5 200 0.06 倒划眼循环 0.04
下载: 导出CSV
-
[1] 胡祖彪,张建卿,王清臣,等. 长庆油田华H50-7井超长水平段钻井液技术[J]. 石油钻探技术,2020,48(4):28–36. doi: 10.11911/syztjs.2020050 HU Zubiao, ZHANG Jianqing, WANG Qingchen, et al. Drilling fluid technology for ultra-long horizontal section of Well Hua H50-7 in the Changqing Oilfield[J]. Petroleum Drilling Techniques, 2020, 48(4): 28–36. doi: 10.11911/syztjs.2020050
[2] 史配铭,薛让平,王学枫,等. 苏里格气田致密气藏水平井优快钻井技术[J]. 石油钻探技术,2020,48(5):27–33. doi: 10.11911/syztjs.2020083 SHI Peiming, XUE Rangping, WANG Xuefeng, et al. Optimized fast drilling technology for horizontal wells in the tight gas reservoirs in Sulige Gas Field[J]. Petroleum Drilling Techniques, 2020, 48(5): 27–33. doi: 10.11911/syztjs.2020083
[3] 刘建峰. 长庆气田长水平段水平井快速钻井技术研究与应用[D]. 西安: 西安石油大学, 2015. LIU Jianfeng. The research and Application of field long horizontal well drilling technology in Changqing gas[D]. Xi’an: Xi’an Shiyou University, 2015.
[4] 甄剑武. 水平井高密度钻井液润滑减阻技术研究及现场试验[J]. 石油钻探技术,2020,48(5):55–60. doi: 10.11911/syztjs.2020076 ZHEN Jianwu. Research and field tests of the lubrication and friction reduction technology of high density drilling fluid in horizontal wells[J]. Petroleum Drilling Techniques, 2020, 48(5): 55–60. doi: 10.11911/syztjs.2020076
[5] 陈士奎,谭枭麒,王荐,等. 页岩气高性能水基钻井液技术研究[J]. 石油化工应用,2018,37(12):57–60. doi: 10.3969/j.issn.1673-5285.2018.12.012 CHEN Shikui, TAN Xiaoqi, WANG Jian, et al. Research of shale gas high performance water base drilling fluid technique[J]. Petrochemical Industry Application, 2018, 37(12): 57–60. doi: 10.3969/j.issn.1673-5285.2018.12.012
[6] 印树明,蓝强,赵怀珍. 高温高密度钻井液润滑技术研究[J]. 能源化工,2019,40(3):42–46. doi: 10.3969/j.issn.1006-7906.2019.03.012 YIN Shuming, LAN Qiang, ZHAO Huaizhen. Study on lubricating technology for high temperature and high density drilling fluid[J]. Energy Chemical Industry, 2019, 40(3): 42–46. doi: 10.3969/j.issn.1006-7906.2019.03.012
[7] 杨建永. 低密度水基钻井液在长深易漏区块深层水平井的应用[J]. 石油和化工设备,2019,22(7):54–56. doi: 10.3969/j.issn.1674-8980.2019.07.016 YANG Jianyong. Application of low-density water-based drilling fluid in deep horizontal wells in long-deep leaky zones[J]. Petro & Chemical Equipment, 2019, 22(7): 54–56. doi: 10.3969/j.issn.1674-8980.2019.07.016
[8] 陈庚绪,刘奥,王茜,等. 适用于页岩气井的强抑制防塌高性能水基钻井液体系[J]. 断块油气田,2018,25(4):529–532. CHEN Gengxu, LIU Ao, WANG Qian, et al. High inhibition and anti-sloughing water-based drilling fluid system for shale gas horizontal wells[J]. Fault-Block Oil & Gas Field, 2018, 25(4): 529–532.
[9] 吴百川. 长水平段水平井井眼净化理论与实践研究[D]. 荆州: 长江大学, 2020. WU Baichuan. Theoretical and practical research on long-horizontal horizontal hole clean[D]. Jingzhou: Yangtze University, 2020.
[10] 焦亚军, 陈安环, 何方雨, 等. 漂浮下套管技术在浅层页岩气水平井中的应用及优化[J]. 天然气工业, 2021, 41（增刊1）: 177-181. JIAO Yajun, CHEN Anhuan, HE Fangyu, et al. Application and optimization of floating casing running technology in shallow shale gas horizontal wells[J]. Natural Gas Industry, 2021, 41(supplement 1): 177-181.
[11] 李伟峰,王艳,于小龙. Z88P4井双漂浮下套管技术研究与应用[J]. 非常规油气,2021,8(4):93–98. doi: 10.19901/j.fcgyq.2021.04.13 LI Weifeng, WANG Yan, YU Xiaolong. The study and application of double floating casing running technology in Z88P4[J]. Unconventional Oil & Gas, 2021, 8(4): 93–98. doi: 10.19901/j.fcgyq.2021.04.13
[12] 王建龙,冯冠雄,刘学松,等. 长宁页岩气超长水平段水平井钻井完井关键技术[J]. 石油钻探技术,2020,48(5):9–14. doi: 10.11911/syztjs.2020086 WANG Jianlong, FENG Guanxiong, LIU Xuesong, et al. Key technology for drilling and completion of shale gas horizontal wells with ultra-long horizontal sections in Changning Block[J]. Petroleum Drilling Techniques, 2020, 48(5): 9–14. doi: 10.11911/syztjs.2020086
-
期刊类型引用(5)
1. 滕先林. 四川威远地区页岩气藏储层纵向可动用程度分析. 中外能源. 2023(08): 52-57 . 
百度学术
2. 张莉娜，任建华，胡春锋. 常压页岩气立体开发特征及缝网干扰规律研究. 石油钻探技术. 2023(05): 149-155 . 本站查看
3. 岑涛，夏海帮，雷林. 渝东南常压页岩气压裂关键技术研究与应用. 油气藏评价与开发. 2020(05): 70-76 . 百度学术
4. 孙林，杨万有，李旭光，熊培祺. 海上油田爆燃压裂技术研究与现场试验. 石油钻探技术. 2019(05): 91-96 . 本站查看
5. 王宏，赖枫鹏，张伟，陈野啸. 非均质低渗透气藏压裂直井产能计算. 断块油气田. 2019(06): 728-733 . 百度学术
其他类型引用(4)
计量
- 文章访问数: 428
- HTML全文浏览量: 171
- PDF下载量: 140
- 被引次数: 9
