渝东南地区页岩气钻完井技术主要进展及发展方向

doi:10.13809/j.cnki.cn32-1825/te.2021.03.010

Abstract

Abstract:

Southeastern Chongqing is the first area to realize commercial development of shale gas in China. According to the main development progress of drilling and completion technologies in this area, 10 key technologies are summarized, which are, casing program optimization, severe loss control in shallow layers, low-cost managed pressure drilling, well trajectory control based on geology-engineering integration, bit selection, oil-based drilling fluid with low oil-water ratio, ROP enhancement through drilling parameter optimization, cementing technology for leakage wells, completion technology for preventing trapped pressure in annulus, and factory-like drilling technology. In order to make up for the deficiency in drilling and completion technologies, six directions of further research are proposed, which are, drilling equipment automation, drilling parameter enhancement, water-based drilling fluid, complex situation treatment, small hole drilling and completion, and shale gas drilling with long horizontal section, which aim to improve the drilling and completion technologies and the exploration and development profits in southeastern Chongqing.

Key words: southeastern Chongqing, shale gas, drilling and completion, technology development, key technology, development direction

CLC Number:

TE242

WANG Yanqi,HE Qing,LONG Zhiping. Main progress and development direction of shale gas drilling and completion technologies in southeastern Chongqing[J].Petroleum Reservoir Evaluation and Development, 2021, 11(3): 356-364.

Figures/Tables 8

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Table 1

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References 29

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开次	井径（mm）	钻压（kN）		排量（L/s）		泵压（MPa）		钻头压降（MPa）		钻头水功率（kW）		射流冲击力（N）
开次	井径（mm）	强化前	强化后	强化前	强化后	强化前	强化后	强化前	强化后	强化前	强化后	强化前	强化后
一开	311.2	120 ~ 140	160 ~ 220	55	65 ~ 70	14.71	25.54	1.92	8.44	105.79	506.32	3 901.5	8 915.0
二开	215.9	60 ~ 120	140 ~ 200	28	31 ~ 34	27.25	31.66	2.22	4.29	74.19	117.51	2 543.7	4 311.4

Main progress and development direction of shale gas drilling and completion technologies in southeastern Chongqing

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