南川常压页岩气田高效开发关键技术进展

doi:10.13809/j.cnki.cn32-1825/te.2021.03.011

Abstract

Abstract:

In order to solve the problems existing in the development of Nanchuan Shale Gas Field, such as complex geological conditions, drilling leakage collapse, unsatisfactory fracturing effect and lack of effective artificial lifting, the optimization, integration and improvement of development technologies have been completed through in-depth research on drilling and completion technology, fracturing technology and gas production technology, and integration development technologies such as high-efficiency drilling and completion technology, high-efficiency fracturing technology and shale gas well drainage and gas production technology have been formed. Among them, the high-efficiency drilling and completion technology of normal-pressure shale gas mainly includes wellbore structure optimization, bit and screw integrated speed-up technology, limit parameter drilling technology and high-efficiency completion technology; high-efficiency fracturing technology mainly includes integrated all-electric pump fracturing technology, integrated sliding sleeve completion fracturing technology, combined temporary plugging steering technology, etc.; the applicable drainage and gas recovery technology of normal pressure shale gas well mainly includes two processes: single pipe jet pumping and mechanical pumping. Through the popularization and application of the above technologies, Nanchuan Block has formed a complete series of high-efficiency development technologies for normal-pressure shale gas fields in different areas and different well depths has been formed in Nanchuan Block, which has promoted the development of normal-pressure shale gas fields with reduced costs and increased efficiency.

Key words: normal-pressure shale gas, Nanchuan area, drilling and completion, integration technology, electric fracturing, artificial lifting

CLC Number:

TE25

ZHANG Guorong,WANG Junfang,ZHANG Longfu,CHEN Shikui. Key technical progress in efficient development of Nanchuan normal-pressure shale gas field[J].Petroleum Reservoir Evaluation and Development, 2021, 11(3): 365-376.

Figures/Tables 18

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References 30

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排量范围（L/s）	额定压降（MPa）	额定扭矩（N·m）	最大推荐钻压（kg）	动力段配置
排量范围（L/s）	额定压降（MPa）	额定扭矩（N·m）	最大推荐钻压（kg）	级数	头数
37.9~75.7	10.69	55 101	57 600	4.8	7/8

钻头尺寸（mm）	钻压（t）	较常规提高（%）	排量（L/s）	较常规提高（%）
311.2	16~20	43	59~64	8
215.9	14~16	60	33~34	13

轨迹控制方式	平均机械钻速（m/h）	段长（m）	周期（d）	单价（万元/d）	测量零长（m）	复合钻进比例（%）	井眼光滑度
LWD+ 水力振荡器	9	1 500	12	5	16~20	70~90	中
近钻头+ 水力振荡器	8.3	1 500	14	7.8	1.0~1.5	40~60	中
旋转导向	10	1 500	11	12.5	2.0~3.5	100	高

序号	井号	平均日产气（m³）		平均日产水（m³）		日均增产（m³）	累计增产（m³）	备注
序号	井号	措施前	措施后	措施前	措施后	日均增产（m³）	累计增产（m³）	备注
1	PY3HF	1 000	4 974	1	14	3 974	2 006 870
2	PY4HF	8 489	11 078	9.28	14.4	2 589	59 547
3	PY5HF	4 402	5 490	9.2	55.4	1 088	68 544
4	SY3HF	0	13 575	0	76			产能下降,难以自喷生产后上射流泵复产
5	LY3HF		10 472		110			直接射流泵投产
6	PD1HF		8 600		38.1			直接射流泵投产
7	JY211-4HF	15 731	20 929	8.25	74.1	5 198	1 003 214
合计							3 138 175

Key technical progress in efficient development of Nanchuan normal-pressure shale gas field

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