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Hydraulic fracturing treatment method of an unconventional reservoir oil and gas well

A hydraulic fracturing, unconventional technology, applied in the field of hydraulic fracturing reconstruction, can solve problems such as limited temperature adaptability and temporary plugging capacity, proppant filling zone or fracture opening damage, difficulty in satisfying repeated fracturing, etc.

Active Publication Date: 2015-11-25
CHINA UNIV OF PETROLEUM (BEIJING) +2
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

At present, the diverting agents used in diverting fracturing are generally oil-soluble resins, polymer cross-linked gels, and surface cross-linked granular plugging agents, etc., which have limited ability to adapt to temperature and temporary plugging capacity. After fracturing, the proppant packing zone or Large damage to fractures, etc., it is difficult to produce all the fractures formed by diversion, and it is difficult to meet the needs of unconventional reservoir diversion fracturing or refracturing of old wells

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  • Hydraulic fracturing treatment method of an unconventional reservoir oil and gas well
  • Hydraulic fracturing treatment method of an unconventional reservoir oil and gas well

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Embodiment 1

[0053] This implementation provides a hydraulic fracturing reconstruction method for tight oil and gas wells (tight sandstone oil and gas wells). Fracturing construction.

[0054] 1. Introduction of well conditions:

[0055] Well A is an evaluation well on the Tazhong No. 16 anticline structure of the Tazhong low uplift in the central uplift of the Tarim Basin. The target layer: Silurian. The post-fracture analysis and production performance of Well Tazhong 169 show that the well has a large scale of fracturing at 4113.5-4121.5 and 4128.5-4130.5 meters. However, due to the long production time and the obvious decline in production, the Silurian 4107.5-4109.0, 4110.0-4111.0-meter well section was re-perforated, and the original production well section 4113.5-4121.5, 4128.5-4130.5-meter well section was sanded and fractured. Production increase and stable production can be achieved through repeated fracturing techniques such as refilling holes, increasing construction scale, a...

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Abstract

The invention provides a hydraulic fracturing treatment method of an unconventional reservoir oil and gas well. The hydraulic fracturing treatment method comprises the following steps: injecting a material liquid into existing fractures of a reservoir; enabling a temporary plugging material in the material liquid to form bridge blinding at the seams of the fractures; performing hydraulic fracturing construction to force the fractures to turn; and injecting an active liquid to activate microfractures of the reservoir, and the steps are performed at least once. By the adoption of the hydraulic fracturing treatment method of the unconventional reservoir oil and gas well, not only can a plurality of man-made fractures be formed, the microfractures of the reservoir can be activated, the drainage area is enlarged, and the single-well yield and the economic benefits are improved. The hydraulic fracturing treatment method provided by the invention is not only suitable for unconventional oil and gas reservoirs such as shale gas, coal bed gas and tight oil and gas but also applied to low-permeability and superlow-permeability conventional oil and gas reservoirs; and meanwhile, the method can be used for straight-well capacity increasing revamp construction and can also be used for capacity increasing revamp construction of horizontal wells, deviated wells and the like.

Description

technical field [0001] The invention belongs to the technical field of petroleum and natural gas exploitation, and in particular relates to a hydraulic fracturing reconstruction method for oil and gas wells in unconventional reservoirs. Background technique [0002] Unconventional reservoirs (tight gas, tight oil, shale gas, etc.) have very low matrix permeability and must undergo hydraulic fracturing to obtain commercial development. Unconventional reservoirs account for a considerable proportion of oil and gas reserves, and will be an important basis for oil and gas production growth for a long time to come. Conventional hydraulic fracturing techniques generally only form a symmetrical double-wing fracture, and the area of ​​contact and communication with oil and gas layers is limited, and the productivity of post-fracture testing is generally low. If multiple hydraulic fractures are formed through diversion fracturing and more low-resistance channels in contact with oil ...

Claims

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Application Information

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IPC IPC(8): E21B43/26
Inventor 周福建刘玉章刘雄飞张福祥彭建新邹国庆郇国庆王磊曲鸿雁刘洪涛张超
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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