SU1245718A1 - Method of hydraulic treatment of producing thickness - Google Patents

Description

The invention relates to the mining industry and can be used when forcing the working fluid into the productive stratum for safe working conditions of miners.

The purpose of the invention is to improve the efficiency of hydroprocessing of the productive strata in zones of geological disturbances of a discontinuous nature by reducing the volume of drilling operations.

The drawing shows a hydroprocessing scheme for the productive stratum in the zone of geological disturbance of a rarefied nature,

The method is carried out as follows.

On the production stratum 1 in the zone of disturbance of the disruptive character, the well 2 is equipped, it is equipped with casing 3, perforation 4 of casing 3 is carried out first in the ... semi-perimeter bore in the direction of the lower section of the productive stratum 1 and injected - the working fluid in the productive strata 1. After the calculated volume of the working fluid is injected into the productive strata 1, the process is isolated. spacing of well 2, for example, washing a plug 5 of dispersed material (sand, clay, etc.). Next, the casing 3 is perforated 6 in the plane along the semi-perimeter in the second upper section of the productive stratum 1 and the working fluid is injected. In this way, hydrofluoric thickening is carried out on both sides of the geological disturbance of a rare nature,

Example. Conductor hydro gas treatment of coal gas

Editor N. Margolin

Compiled by A.Gubaylovsky

Tehred L.Oleynik, Proofreader E.Sirohman

Za1 $ az 3972/23 Circulation 436

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, st. Project, 4

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 ABOUT

12457182

To The reservoir is subject to geological disturbance of a discharge character with a discharge amplitude of 2.0-3.0 m, the reservoir thickness is 0.7 m, the effective porosity of the 5 coal massif is 3%. With a design radius of treatment equal to 150 m, it is necessary to download

1480 m%

seam thickness, m; The reduced radius of hydrotreatment of a coal seam, Mi is the effective porosity of the coal mass, fraction.

0 5 0 o

five

To do this, drill a hole in the zone of disturbance amplitude to the coal seam, cased it with steel pipes and cement the annulus. Then, in the plane of the lower portion of the formation, a perforation is carried out half a perimeter of the casing string. The number of perforations must satisfy the expression SLV and the borehole cross-sectional area, with d 0.126 m and 8., 012 m2. Thus, with an average diameter of one perforation; holes, 03 m, 0007 m; the number of perforations is at least 17.

After the hydroperforation is performed, the calculated volume of working fluid is pumped into the coal seam. Then. they wash sand plug up to the soil of the upper part of the formation. The casing is perforated by a semi-perimeter in the direction of the coal mass and the injection of the calculated volume of working fluid is carried out.

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Claims (1)

METHOD OF HYDROPHINING OF PRODUCTIVE THICKNESS, including drilling a well from the surface and the producing stratum, equipping it with a casing string, perforating the casing strings and injecting the working fluid into the productive stratum, with the aim of increasing profitability hydrotreatment in zones of geological disturbances of a discontinuous nature due to a reduction in the volume of drilling operations, a well is drilled in the zone of the amplitude of geological disturbance, and the perforation of the casing is carried out along its semi-perimeter directed from the discontinuous of HA § Rushen and the working fluid is injected selectively into every part of the geologically disturbed productive strata. SU. <"> 1245718 A1 1245718 2