Experiment table and experiment method for simulating conveying and laying of propping agent in reservoir fracturing fracture

A technology for simulating reservoirs and proppants, applied in 3D modeling, earthwork drilling, 2D image generation, etc., it can solve the problems such as the initiation and closure of fracturing fractures that cannot be simulated repeatedly, and achieve the effect of ensuring repeatability

Active Publication Date: 2020-08-18
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the technical problem of being unable to repeatedly simulate the initiation and closure of fracturing fractures in the prior art, the present invention discloses an experimental platform and experimental method for simulating proppant delivery and laying in reservoir fracturing fractures

Method used

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  • Experiment table and experiment method for simulating conveying and laying of propping agent in reservoir fracturing fracture
  • Experiment table and experiment method for simulating conveying and laying of propping agent in reservoir fracturing fracture
  • Experiment table and experiment method for simulating conveying and laying of propping agent in reservoir fracturing fracture

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Such as figure 1 As shown, an experimental platform for simulating proppant delivery and laying in reservoir fracturing fractures, including sand-carrying fluid preparation part, reservoir fracturing simulation part, sand-carrying fluid recovery part, scanning imaging part, control and data monitoring part.

[0046] Specifically:

[0047] The preparation part of the sand-carrying fluid mixes the proppant particles and the fracturing fluid to prepare the sand-carrying fluid. Open a sand inlet 1, the liquid storage tank 2 is placed upside down above the mixing box 3, the electric agitator 5 is installed inside the mixing box 3, proppant particles are added to the mixing box 3 through the sand inlet 1, and the liquid storage is opened The No. 1 valve 4 installed at the connection between the tank 2 and the mixing tank 3 can inject the fracturing fluid into the mixing tank 3, and mix the fracturing fluid and proppant to obtain the sand-carrying fluid for use.

[0048] Th...

Embodiment 2

[0058] The invention discloses an experimental method for simulating proppant delivery and laying in reservoir fracturing fractures, using the test bench in Example 1, specifically comprising the following steps:

[0059] Step 1. Stress loading

[0060] The computer 28 controls the axial hydraulic pump 12 to inject hydraulic oil into the axial hydraulic cylinder 11 through the high-pressure pipe, controls the horizontal hydraulic pump 13 to inject hydraulic oil into the injection pressure chamber 6, and loads the axial stress of the reservoir model 9 to 15 MPa, The horizontal stress is loaded to 5MPa.

[0061] Step 2. Preparation of sand-carrying fluid

[0062] Open No. 1 valve 4, inject the 2L fracturing fluid sample pre-stored in the liquid storage tank 2 into the mixing tank 3, and add 600g of proppant from the sand inlet 1 to the mixing tank 3 according to the concentration meter of 300g / L Granules, start the electric agitator 5 inside the mixing tank 3, stir and mix the...

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Abstract

The invention discloses an experiment table and an experiment method for simulating propping agent conveying and laying in reservoir fracturing fractures; relates to the mining and geotechnical engineering technical field. The experiment table comprises a sand-carrying fluid preparation part, a reservoir fracturing simulation part for simulating a reservoir fracturing process, a sand-carrying fluid recovery part for realizing separation of fracturing fluid and a propping agent, and a scanning imaging part for scanning a solid form in a reservoir model. According to the method, the artificial fractures are preset in the reservoir model, so that the fracturing fracture initiation, expansion and closing processes in an experiment are effectively realized, and the method is closer to a real reservoir fracturing process; CT scanning and three-dimensional reconstruction technologies are adopted, observation of conveying and laying characteristics of the propping agent in the fracturing fracture is achieved, and comprehensive analysis of the sand carrying performance of the fracturing fluid and the sand production amount after fracturing is achieved in combination with measurement of themass of the propping agent in the flowback fluid.

Description

technical field [0001] The invention relates to the technical fields of mining and geotechnical engineering, in particular to an experimental platform and an experimental method for simulating proppant transport and laying in reservoir fracturing cracks. Background technique [0002] At present, proppant is an important technical component in the hydraulic fracturing process of unconventional natural gas reservoirs. A certain amount of proppant is pre-mixed in the fracturing fluid, and then the fracturing fluid is injected into the wellbore, and after the reservoir is ruptured to produce fractures under high pressure, the proppant will enter the fracture along with the fracturing fluid. After the fracturing operation is completed, under the support of a large number of proppant particles, the cracks can maintain a certain opening, thus ensuring the smooth flow of natural gas channels and effectively improving the production effect. Therefore, whether the proppant can be tra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20G06T17/05G06T11/00E21B43/267
CPCG06F30/20G06T17/05G06T11/003E21B43/267
Inventor 黄启铭王刚程卫民孙路路刘义鑫
Owner SHANDONG UNIV OF SCI & TECH
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