RU2001254C1 - Method for wave treatment of strata - Google Patents

Description

From the conditions of the technology of the wave exposure process, the degree of quenching of the energy of seismic waves and technical capabilities, the magnitude of the disturbing force of the vibration source is determined.

The order of operations for calculating and selecting parameters of a vibration source, determining geological and physical characteristics is given above.

The coordination of the mass-energy parameters of the vibro-seismic source with the physicomechanical properties of the soil and the geological and physical parameters of the reservoir is achieved by the fact that the natural frequency of the seismic source will be determined by the formula

Equivalent reduced stamp radius

r0 v / rS / jT vA35.6 / 3.14 -3.38m.

The attached MSD mrp 1.17 / 9g03 1,172,53.383.105t. The hardness of the soil representing sandy loam with E 10-103t / m and it 0.25 is determined.

WITH

2 E Vs 2 10 103v5sT6

1-U

1 - 0.252

- 13.3 104t / m

V

2 E S

(1) mB + 1.17p (F / jrp) 3/2

which will be equal to i) res square, i.e. a) (1) ree pl, where gfp is the mass of the vibration source, tv is gpgr.

Then process the productive reservoir, respectively, and the reservoir by the wave field with the calculated frequency according to the mode specified by the technology of wave exposure.

An example of the implementation of the proposed method of wave processing of formations. A productive reservoir was selected with a reservoir thickness of h 75 m; the speed of passage of elastic waves directed perpendicular to the strike of the formation, v 600 m / s; disturbing force of the vibration source F 100 tf. Vibrator-to-stanavlirls on the soil, consisting of sandy loam with clay with the following characteristics: density p - 2.5 t / m3. modulus of elasticity (Ј 10103 t / m2, coefficient of transverse elastic deformation / g 0.25. Specific dynamic load p 2.8 t / m2.

In accordance with the formula, the resonant frequency of the formation is determined at k 1 TTV 3.14 600

Wpea pl - - - 5. 1

 25.12 1 / s Hz,

Then, with a disturbing force F 100 tf, the area s of the emitting stamp is determined at p 2.5 t / m

100 35.6 m2.

2,8

Determine the mass of the system

twenty

  210T

ft / 42

and mass of vibration source with a radiating stamp

tv t - tgr 210-105 105 t Under the condition F Гп0, according to the calculation of F 100 tf, t0 105 t, you can use a vibro-seismic source of unbalanced fVma with a load.

When the vibro-seismic source operates in the proposed mode, when (oh Schrepp., The seismic power increases, which increases oil recovery and well production.

The proposed method and calculation technique allows determining the parameters of the vibration source in conjunction with the physicomechanical properties of the soil and the formation power, which ensure the resonant operation of the vibration source with the natural frequency of the reservoir. When the vibration source is switched to the resonant mode of operation, the generated power increases, as

The enclosed calculations showed an increase in the power of the field, which is inactive on the reservoir from an vibration source operating in a resonant mode with a natural frequency of the reservoir compared to the non-resonant regime, reaches 1.7 times.

(56) R sheptsev I.P. et al. Controlled seismic impact on oil deposits. Siberian Dep. USSR Academy of Sciences, SLE of Applied Geophysics SB AS, 1989, p. 11-15.

Claims (1)

The claims METHOD FOR WAVE PROCESSING OF STREDS. comprising generating harmonic wills by oscillating from a power drive with a given frequency of the vibration source and exposing it to an emitting stamp, characterized in that that, in order to increase the final oil and gas recovery of the formation and the flow rate of the wells, the vibroseismic effect on the formation is carried out by a vibration source, the mass-energy parameters of which are consistent with the physical and mechanical properties of the soil, and the natural frequency W of the vibration source is determined from the following expression: W 2E5 / (7-2) m + UITMtt-rT / lJ, 3TZT RPG 7G where W is the natural frequency of vibration sources ka E - modulus of elasticity of the soil under the emitting stamp, t / m2; ft - coefficient of transverse elastic deformation of the soil: F is the amplitude of the disturbing force, t. P is the specific allowable dynamic stamp load on the ground, t / m2, p - soil density under the stamp, t / m2; m is the mass of the vibration source with a radiating stamp, t, wherein the formation treatment is carried out with the equality of the natural frequency of the vibration source with the angular frequency of the reservoir.