56 Result(s)
within
S. V. Serdyukov
Earth Sciences
English
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Article
Laboratory Installation and Procedure to Determine Gas Permeability of Rocks
The article presents the installation meant for the determination of gas permeability of rock specimens placed in a testing cell with the adjustable axial and lateral compression. The installation includes a m...
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Article
Open-hole multistage hydraulic fracturing system
The presented system is intended for multistage hydraulic fracturing in long open holes of any orientation to create transversal fractures with a radius to 5 m in soft and medium-hard rocks. The downhole syste...
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Article
Hydraulic fracturing for in situ stress measurement
It is experimentally found that shut-in pressure conforms with the fracture initiation pressure if the fracture surfaces are uniformly loaded by fluid. The article shows that equaling minimal stress and shut-i...
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Article
Down-the-hole unbalance vibration exciter for seismic treatment of bottom-hole zone
The down-the-hole unbalance vibration exciter with the pneumatic drive is designed to treat face zone in the seismic frequency range. The modular-type source consists of a vibration generator with the automate...
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Article
Experimental test of directional hydraulic fracturing technique
The article reports the data of a lab test of directional hydraulic fracturing carried out on a block made of organic glass. A fracture across a hole is created by means of additional shearing stress applied t...
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Article
Polymeric insulating compositions for impervious screening in rock masses
The three-component polyurethane composition is developed to create impervious screens in rock mass by hydraulic fracturing technique. Formulas for working fluids and their injection charts are given. The arti...
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Article
Down-the-hole device for measuring recovery and coal permeability
A down-the-hole device has been designed for gas dynamics analysis in coal. The device is manufactured based on the layout of a straddle packer with an adjustable interval. The device design is suitable for hy...
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Article
Mathematical modeling of stress state of surrounding rocks around the well subjected to shearing and normal load in hydraulic fracturing zone
The authors report the numerical modeling data on stress state of a rock mass in the vicinity of hydraulic fracturing when two closely-spaced intervals of the well are subjected to shearing and normal load. Th...
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Article
Protection of operating degassing holes from air inflow from underground excavations
The article considers the method of recovering structural integrity of operating degassing holes without outage and the scheme of cross-wise hydraulic fracturing in the hole-bottom zone using mechanical anchor...
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Article
Assessment of deformation properties of rocks by pressuremeter testing in hydrofractured interval
The authors propose the method to estimate deformation properties of rocks by the data on pressuremeter test in hydrofractured interval, allowing in situ values of Young’s modulus and Poisson’s ratio of rocks....
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Article
Precision dilatometer with built-in system of advance along the borehole
The article describes engineering designs of dilatometer to measure transverse deformation in borehole subjected to internal pressure exerted through impermeable shell. The device is equipped with the robotize...
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Article
Equipment for microseismic monitoring of geodynamic processes in underground hard mineral mining
The article describes engineering decisions on equipment for acquisition of microseismicity data, that improve information content of microseismic monitoring of geodynamic processes in underground hard mineral...
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Article
Downhole unbalance vibration exciter near-field analysis
The article reports numerical investigation of near-field region of a downhole unbalance vibration exciter. It is found that vibration intensity is spatially variable and depends on vibration frequency. The au...
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Article
Procedure and equipment for sealing coal bed methane drainage holes by barrier shielding
The article presents guidelines, test model design and barrier shield design model aimed to improve the quality of sealing coal bed methane drainage holes by the barrier shielding method.
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Article
Sealing of coal bed methane drainage holes by barrier screening method
The authors have developed the barrier screening method to seal coal bed methane drainage holes. The method reduces air leakage from enclosing rocks to evacuation holes. The compositions of screens with extern...
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Article
Wave tomography of methane pockets in coal bed
The wave tomography method is a finite difference analog of the classical seismic ray tomography. The computational investigation is reported in the article. The proposed approach allows identification of velo...
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Article
Near-field range of the direct-impact seismic source
The authors have developed and numerically analyzed a model of near-field range of the percussion-type well seismic source emission. The obtained estimates of attack energy on productive strata at underspeed s...
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Article
Froth gel for gas-bearing coal bed hydrofracturing in mine conditions
For the purposes of coal bed hydrofracturing and enhancement of coal methane recovery, frothed gel with small fluid volume residual has been developed. The article describes tests of the frothed gel composed o...
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Article
Assessment of stress state in rocks by deformation characteristic of borehole zone with hydrofracture
The authors propose the method of stress state assessment in permeable rocks. The method is numerically studied as the relationship between cross-section area of borehole length interval with a hydrofracture a...
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Article
Seismic approach to location of methane accumulation zones in a coal seam
A new approach offered by authors to detecting accumulation and circulation sites of free methane is based on seismic sounding of a zone in the course of its stress-strain state alteration, which provides sele...
