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Shale formation drilling and coring hydrocarbon entrapment device

A technology for drilling and oil and gas, which is applied in the field of oil and gas capture devices for drilling and coring in shale formations, and can solve problems such as difficult oil and gas capture while drilling

Pending Publication Date: 2018-11-13
中石化石油工程技术服务有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, under the current drilling technology conditions, during the tripping process of the rock sample obtained by drilling and coring, due to the continuous decrease of the core environmental pressure, when the core reaches the ground, almost all the gas stored in the core is discharged, which is difficult Complete capture of oil and gas while drilling

Method used

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  • Shale formation drilling and coring hydrocarbon entrapment device
  • Shale formation drilling and coring hydrocarbon entrapment device
  • Shale formation drilling and coring hydrocarbon entrapment device

Examples

Experimental program
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Effect test

Embodiment 1

[0019] Embodiment 1, a shale formation drilling and coring oil and gas collection device, comprising a gas storage tank body 6, an upper sealing cover 4 of the gas storage tank and a lower sealing cover 10 of the gas storage tank arranged in the upper and lower ports of the gas storage tank body 6, the storage tank The upper end of the air cylinder body 6 is sealed and connected with the matching joint 13 on the air storage cylinder, and the upper sealing cover 4 of the air storage cylinder is axially limited, the lower end of the air storage cylinder body 6 is connected with the exhaust valve assembly 12, and the lower sealing cover 10 of the air storage cylinder is The axial position is limited, and the piston rod 7 is connected between the upper sealing cover 4 of the air storage tank and the lower sealing cover 10 of the air storage tank. The external sliding seal of the piston rod 7 is matched with a balance piston 9. The sealing chamber composed of the upper sealing cover...

Embodiment 2

[0021] Typical embodiment 2, with reference to appended Figure 1-3 , a pressure balance device for oil and gas capture device for drilling and coring in shale formations, comprising a proportional pressure relief valve 1, a pin 2 and a gasket 3, an upper sealing cover 4 of a gas storage tank, a sealing ring 5 on a piston rod, a gas storage tank body 6, Piston rod 7, piston sealing ring 8, balance piston 9, air storage tank lower sealing cover 10, exhaust valve assembly 12 and upper matching joint 13 of the air storage tank.

[0022] The proportional pressure relief valve 1, the upper sealing cover 4 of the gas storage tank, the piston rod 7, the balance piston 9, and the lower sealing cover 10 of the gas storage tank are connected in sequence and placed inside the gas storage tank body 6, the proportional pressure relief valve 1 and the upper sealing cover 4 of the gas storage tank Through threaded connection, the upper and lower ends of the piston rod 7 are respectively inse...

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Abstract

The invention discloses a shale formation drilling and coring hydrocarbon entrapment device which comprises a decompression valve, a gas storage cylinder upper sealing cover, a gas storage cylinder body, a piston rod, a balance piston, a gas storage cylinder lower sealing cover, an exhaust valve assembly and a gas storage cylinder upper crossover sub. The decompression valve, the gas storage cylinder upper sealing cover, the piston rod, the balance piston and the gas storage cylinder lower sealing cover are sequentially connected to be arranged in an inner cavity of the gas storage cylinder body. The upper end and the lower end of the gas storage cylinder body are connected with the gas storage cylinder upper crossover sub and the exhaust valve assembly. When drilling and coring operationis conducted on a shale formation through the shale formation drilling and coring hydrocarbon entrapment device, hydrocarbon overflowing from a core can be almost 100% collected in situ in the drilling process under the allowable safe working pressure, and the original gas content, the gas / oil ratio, directly-measured saturability, lossless gas content and other data which can not be acquired by other conventional coring technologies and reinforced reservoir data can be analyzed.

Description

technical field [0001] The invention relates to a shale formation drilling and coring oil and gas collection device used in the field of shale gas exploration and development. Background technique [0002] The fluid saturation of reservoir rock plays a very important role in the exploration and development of shale oil and gas. It is an indispensable parameter for calculating oil and gas reserves, analyzing development performance and improving ultimate recovery. However, under the current drilling technology conditions, during the tripping process of the rock sample obtained by drilling and coring, due to the continuous decrease of the core environmental pressure, when the core reaches the ground, almost all the gas stored in the core is discharged, which is difficult Complete capture of oil and gas while drilling. Contents of the invention [0003] The purpose of the present invention is to solve the problems existing in the prior art, and provide a shale formation dri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B49/08
CPCE21B49/081
Inventor 裴学良陈忠帅吴仲华司英晖宁仁磊王彬于文涛于波赵宗锋
Owner 中石化石油工程技术服务有限公司