南川地区页岩气水平井优快钻井技术进展及发展建议

彭兴; 周玉仓; 龙志平; 张树坤

doi:10.11911/syztjs.2020057

南川地区页岩气水平井优快钻井技术进展及发展建议

doi: 10.11911/syztjs.2020057

1.
中国石化华东油气分公司石油工程技术研究院，江苏南京 210031
2.
中石化胜利石油工程有限公司固井技术服务中心，山东东营 257000

基金项目: 国家科技重大专项“彭水地区常压页岩气勘探开发示范工程”（编号：2016ZX05061）资助

详细信息

作者简介:
彭兴（1989—），男，江苏徐州人，2012年毕业于西安石油大学石油工程专业，2015年获中国石油大学（北京）石油与天然气工程专业（钻井方向）硕士学位，助理研究员，主要从事非常规油气钻井技术方面的研究工作。E-mail：jspx29@163.com

中图分类号: TE243⁺.1
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出版历程
- 收稿日期: 2019-12-10
- 修回日期: 2020-04-28
- 网络出版日期: 2020-07-10
- 刊出日期: 2020-09-25

Progress and Development Recommendations for Optimized Fast Drilling Technology in Shale Gas Horizontal Wells in the Nanchuan Area

1.
Petroleum Engineering Technology Research Institute, Sinopec East China Oil & Gas Company, Nanjing, Jiangsu, 210031, China
2.
Cementing Technology Service Center, Sinopec Shengli Oilfield Service Corporation, Dongying, Shandong, 257000, China

摘要

摘要: 南川地区是中国石化继涪陵页岩气一期产建区后的又一个页岩气产建区，为进一步促进该地区页岩气水平井钻井提速提效，在借鉴涪陵页岩气一期建设成熟经验的基础上，分析了该地区页岩气水平井钻井存在的技术难点，进行了井身结构优化、个性化高效钻头优选、井眼轨道设计优化、固井完井方式优化和组合钻机“井工厂”钻井模式等方面的技术研究，形成了适合于南川地区的页岩气水平井优快钻井技术。该钻井技术在南川平桥南区块应用了30余口井，平均钻井周期由应用初期的93.00 d缩短至79.67 d，平均优质储层钻遇率达98%以上，其中一趟钻进尺大于1 000 m的井超过60%，提速提质效果良好。在此基础上，分析了焦页10井区和东胜区块的水平井钻井技术难点，提出了技术攻关建议，以期为南川地区后续产能建设中高效钻井提供技术支撑。
- 页岩气 /
- 水平井 /
- 优快钻井 /
- 防漏堵漏 /
- 井眼失稳 /
- 井眼轨迹控制 /
- 南川地区
Abstract: the Nanchuan Area is another shale gas deliverability construction area of Sinopec and it follows the phase I deliverability construction of the Fuling shale gas area. In order to further improve the ROP and drilling efficiency of shale gas horizontal wells in this area, and to take into consideration the mature experiences of the Fuling shale gas phase I project, this paper systematically summarizes the existing problems in drilling the shale gas horizontal wells in this area. An optimized fast drilling technology for shale gas horizontal wells in Nanchuan Area was designed based on the analysis and research on the optimization of casing program, customized high-efficiency bit, wellbore trajectory design, cementing and completion modes, and the multi-well pad construction mode with combined drilling rigs, etc., This drilling technology was applied in more than 30 wells in the South Pingqiao Block of Nanchuan, which shortened the average drilling cycle from 92.00 d to 79.67 d and increased the average encountering rate of high-quality reservoirs to more than 98%. Further, more than 60% of these wells achieved a footage of more than 1,000 m in one trip, proving that the drilling technology could greatly improve the ROP and efficiency. On this basis, taken together with the horizontal well drilling difficulties in the JY10 Well Block and the Dongsheng Block with complex structure, recommendations were made to provide technical support for the subsequent deliverability, construction and efficient drilling in the Nanchuan Area.
- shale gas /
- horizontal well /
- optimized fast drilling /
- leakage prevention and plugging /
- borehole instability /
- hole trajectory control /
- Nanchuan Area

HTML全文

图 1 开发井井身结构优化方案示意

Figure 1. Optimization scheme of development well casing program

下载: 全尺寸图片幻灯片

图 2 组合钻机“井工厂”钻井模式施工流程

Figure 2. Construction flow of multi-well pad mode with combined drilling rig

下载: 全尺寸图片幻灯片

表 1 3种导向工具的综合应用成本

Table 1. Comprehensive application cost of three steering tools

导向工具	机械钻速/ （m·h^–1）	段长/m	钻进时间/d	服务单价/ （万元·d^–1）	服务成本/ 万元	综合成本/ 万元	测量零长/ m	复合钻进比例，%	井眼光滑度
常规LWD	6.10	2 200.00	32.0	3.7	118	342	16.00～20.00	30～40	低
近钻头地质导向	7.10	2 200.00	24.8	7.5	186	360	1.00～1.50	40～60	低
旋转导向	9.60	2 200.00	17.7	12.0	212	336	2.00～3.50	100	高
注：以ZJ50型钻机使用日费7.0万元为例，假定其他影响因素均相同。

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