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APPLICATION OF DRILLING TECHNOLOGY OF HIGH-INCLINATION AND HORIZONTAL WELLS IN DESfGBIAN BLOCK OF CHANGQING OILFIELD

Yang Yingfeng, Ccdc Changqing

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Abstract

Dingbian Block is the main block of increasing the production in Changqing Oilfield and its target bed is Chang8 formation. Horizontal and high-inclination wells have been used widely in recent years. The oil shale is existent in Chang 7 formation of the block, which causes the borehole wall collapse and sticking when tripping and logging in this section, even makes a well discarded. In order to ensure drilling safety in Chang 7 oil shale formation, the drilling design was optimized, PDC bit and drilling tool structure were improved, and system and compounding formula of drilling fluid were optimized. The drilling technology suited for high-inclination and horizontal wells in Dingbian block was formed.

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What this paper is about

Dingbian Block is the main block of increasing the production in Changqing Oilfield and its target bed is Chang8 formation. Horizontal and high-inclination wells have been used widely in recent years. The oil shale is existent in Chang 7 formation of the block, which causes the borehole wall collapse and sticking when tripping and logging in this section, even makes a well discarded. In order to ensure drilling safety in Chang 7 oil shale formation, the drilling design was optimized, PDC bit and drilling tool structure were improved, and system and compounding formula of drilling fluid were optimized. The drilling technology suited for high-inclination and horizontal wells in Dingbian block was formed.

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Available abstract

Dingbian Block is the main block of increasing the production in Changqing Oilfield and its target bed is Chang8 formation. Horizontal and high-inclination wells have been used widely in recent years. The oil shale is existent in Chang 7 formation of the block, which causes the borehole wall collapse and sticking when tripping and logging in this section, even makes a well discarded. In order to ensure drilling safety in Chang 7 oil shale formation, the drilling design was optimized, PDC bit and drilling tool structure were improved, and system and compounding formula of drilling fluid were optimized. The drilling technology suited for high-inclination and horizontal wells in Dingbian block was formed.

Key concepts: Drilling, Petroleum engineering, Borehole, Tripping, Geology, Directional drilling, Oil shale, Block (permutation group theory)

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APPLICATION OF DRILLING TECHNOLOGY OF HIGH-INCLINATION AND HORIZONTAL WELLS IN DESfGBIAN BLOCK OF CHANGQING OILFIELD — Research Paper | ScholarLens