Method for physically simulating sectional hydrofracture of different well types of perforated well shafts

A technology of hydraulic fracturing and physical simulation, which is applied in the direction of wellbore/well components, earthwork drilling and production, and production fluid, etc. Interference between fracturing and multi-stage hydraulic fracturing

Active Publication Date: 2014-09-24
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this invention does not disclose a physical simulation method for staged hydraulic fracturing of perforated wellbores of different well types, nor does it provide research on multi-stage hydraulic fracturing and the mutual interference between multi-stage hydraulic fracturing

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  • Method for physically simulating sectional hydrofracture of different well types of perforated well shafts
  • Method for physically simulating sectional hydrofracture of different well types of perforated well shafts
  • Method for physically simulating sectional hydrofracture of different well types of perforated well shafts

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Embodiment 1

[0070] A physical simulation method for staged hydraulic fracturing of perforated wellbores of different well types, comprising the following steps:

[0071] (1) Process the simulated wellbore, and arrange perforation holes on the simulated wellbore wall;

[0072] (2) Prefabricate the simulated wellbore in step (1) into the artificial core sample, and use the true triaxial hydraulic fracturing device system (such as Figure 6 shown) to carry out hydraulic fracturing physical simulation experiments;

[0073] (3) Through the hydraulic fracturing physical simulation experiment in step (2), observe the hydraulic fracture initiation and expansion form at the perforation holes on the simulated wellbore wall.

[0074] In this embodiment, the simulated wellbore is a vertical well simulated wellbore, and the simulated vertical wellbore is composed of a wellbore head 5 and a vertical well simulated wellbore body 1. The wellbore head 5 includes a concave sealing groove, and the wellbore...

Embodiment 2

[0099] A physical simulation method for staged hydraulic fracturing of perforated wellbores of different well types, comprising the following steps:

[0100] (1) Process the simulated wellbore, and arrange perforation holes on the simulated wellbore wall;

[0101] (2) Prefabricate the simulated wellbore in step (1) into the artificial core sample, and use the true triaxial hydraulic fracturing device system to carry out the hydraulic fracturing physical simulation experiment;

[0102] (3) Through the hydraulic fracturing physical simulation experiment in step (2), observe the hydraulic fracture initiation and expansion form at the perforation holes on the simulated wellbore wall.

[0103] In this embodiment, the simulated wellbore is a simulated wellbore for a deviated well, and the simulated wellbore for an inclined well includes a wellbore head 5, a simulated wellbore 3 for an auxiliary horizontal section, and a simulated wellbore 2 for an inclined section; the wellbore head...

Embodiment 3

[0129] A physical simulation method for staged hydraulic fracturing of perforated wellbores of different well types, comprising the following steps:

[0130] (1) Process the simulated wellbore, and arrange perforation holes on the simulated wellbore wall;

[0131] (2) Prefabricate the simulated wellbore in step (1) into the artificial core sample, and use the true triaxial hydraulic fracturing device system to carry out the hydraulic fracturing physical simulation experiment;

[0132] (3) Through the hydraulic fracturing physical simulation experiment in step (2), observe the hydraulic fracture initiation and expansion form at the perforation holes on the simulated wellbore wall.

[0133] In this embodiment, the simulated wellbore is a simulated wellbore for a deviated well, and the simulated wellbore for an inclined well includes a wellbore head 5, a simulated wellbore 3 for an auxiliary horizontal section, a simulated wellbore 4 for an auxiliary vertical section, and a simul...

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Abstract

The invention belongs to the field of technical research on oil and gas reservoir development and particularly relates to a method for physically simulating sectional hydrofracture of different well types of perforated well shafts. The method comprises the following steps of: (1) processing a simulated shaft and arranging bullet holes on the well wall of the simulated shaft; (2) prefabricating the simulated shaft in the step (1) into an artificial core test sample and developing a hydrofracture physical simulation experiment by utilizing a true triaxial hydrofracture device system; and (3) observing fracture initiation and extension forms of hydraulic fractures at the positions of the bullet holes on the well wall of the simulated shaft by the hydrofracture physical simulation experiment in the step (2). According to the method, aiming at geological development blocks with different reservoir structures, different well types and fracture processes can be selected to carry out effective indoor simulation evaluation research; and the theoretical foundation is provided for design and scheme optimization of the hydrofracture process of conventional or unconventional dense oil and gas reservoirs and complex oil-gas blocked deposits.

Description

technical field [0001] The invention belongs to the technical research field of oil and gas reservoir development, and in particular relates to a physical simulation method for segmental hydraulic fracturing of perforated well bores of different well types. Background technique [0002] my country's land shale gas, coalbed methane, tight oil and gas and other unconventional oil and gas reservoirs and offshore oil and gas reservoirs are widely distributed, with huge prospective reserves. Efficient development of such oil and gas reservoirs has been the long-term focus of the petroleum industry. Unconventional oil and gas reservoirs are characterized by low porosity and low permeability. Efficient development of such unconventional oil and gas reservoirs requires large-scale hydraulic fracturing operations. However, offshore and coastal oil and gas reservoirs have limited drilling platforms, and at the same time, there are many layers of underground reservoirs, uneven horizont...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/26
Inventor 侯冰陈勉金衍刘志远卢运虎
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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