A multi-well hydraulic fracturing test device

By designing a multi-well hydraulic fracturing test device, the problem of stress interference in multi-well hydraulic fracturing not being considered in the existing technology was solved. The device enables the simulation of simultaneous or sequential fracturing of multiple wells on core samples, and provides stress interference analysis and data support for multi-well hydraulic fracturing.

CN117605455BActive Publication Date: 2026-07-17EXPLORATION TECH RES INST OF CHINESE ACADEMY OF GEOLOGICAL SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
EXPLORATION TECH RES INST OF CHINESE ACADEMY OF GEOLOGICAL SCI
Filing Date
2024-01-02
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing indoor fracturing test equipment cannot effectively simulate stress interference during multi-well hydraulic fracturing. In particular, the stress interference between fractures in multi-well hydraulic fracturing is not fully considered, which may inhibit the fracturing effect of other wells when the fracturing design is unreasonable.

Method used

A multi-well hydraulic fracturing test device was designed, including a core loading tool, a fracturing fluid injection system and a loading structure. It can realize simultaneous or sequential fracturing of multiple wells on core samples. The loading structures in the X, Y and Z directions are used to simulate stress interference in different directions, and multiple fracturing pumps are equipped to simulate multi-well fracturing conditions.

Benefits of technology

It enables the analysis of stress interference generated by multi-well fracturing on core samples, can simulate multi-well fracturing under the condition of five-point well network layout, supports fracturing simulation when the minimum principal stress is not perpendicular to the connection line of two wells, and provides more reliable multi-well hydraulic fracturing data reference.

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Abstract

This invention discloses a multi-well hydraulic fracturing test apparatus, relating to the field of reservoir fracturing technology. It includes a core loading fixture, a fracturing fluid injection system, and a control system. The core loading fixture has a core loading cavity for placing core samples. Inside the fixture are two symmetrically arranged X-axis loading structures, two symmetrically arranged Y-axis loading structures, and one Z-axis loading structure. Five fracturing holes are distributed in a five-point pattern at the top of the core loading fixture, each capable of being sealed with a plug. The fracturing fluid injection system includes a fracturing fluid tank and multiple injection pipes connected to the tank. Each injection pipe is equipped with a fracturing pump. The end of each injection pipe furthest from the fracturing fluid tank passes through the fracturing holes and extends into the core loading cavity. The multi-well hydraulic fracturing test apparatus provided by this invention enables simultaneous or sequential fracturing of multiple wells on core samples, facilitating the analysis of stress interference generated by fracturing in each well.
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