SU406005A1 - - Google Patents

Description

METHOD OF RESEARCH OF OIL AND GAS PLATES

The invention is referred to as spoooobam of the study of hydraulic and gas-tight formations exposed to sk1V | azhina by acoustic k / rotazh. The purpose of the study is a detailed study of the inhomogeneity of Schlesta according to Pr1ON | Itzamootii.

The method of determining the neo | NOR OD of the reservoir by inpoaHuaieMOCTiH has been learned by measuring the reservoir rate by its thickness. For this purpose, there is a change in the flow rate in the wellbore with the help of debiters, for example, with a mechanical turbine, silt and thermoconductor, aethee m air quality, i.e., i.e., iMiontHoCTM reservoir with a change in his pranaity.

The main 1H of this method consists in the fact that the production rate of the plastic layer before iBcero depends on the quality of “hide the reservoir, first line of the bottomhole zone, C01 of cement cola1,, a, .a, also the nature of the flow B well. Therefore, a qualitative assessment of the permeability of a region by: power is often impossible.

. In other words, obtaining information about the properties of the reservoir through the study of noto-. Liquid in the wellbore is difficult because of the 1M Noise Interference, and the will of the well and on the way from the reservoir to the well.

.More reliable information on the permeability of the .plast can be obtained (with

cHocoiooB, with (which is studied directly by the area of the area, opened by the borehole. For example, by means of ter | Momet, the permeability of the formation is determined by the magnitude of the throttle effect - HaiDpeiBa in flipper by filtering the liquid through it.) fundamental difficulties associated with the imposition of calorimetric effects and convective heat transfer in the reservoir and the wellbore.

The most effective methods for investigating permeability heterogeneity of the p-paste are the transfer of the labeled liquid, gas or air, methods based on studying the process of disbanding the penetration zone, and the methods that are most important for taking a sample of fluid from the fins using 1 samplers with measuring the filling rate of the balloon. However, all ET | And methods are very difficult: powerful and expensive, and therefore: can be matched only as a reference to obtain reference data for the purpose of linking the results of other methods 1A to find the correlation between two geo: physical the traditional par. diameter is nipoHH

The classic method for determining permeability is a method for restoring pressure curves. Essence of it

The method consists in the fact that with the help of technology, and other technical means, a positive effect is created on the reservoir, and then for some time, the recovery curves are generated, and the depth gauges are deep. This operation takes place at several non-short intervals. The measure of heterogeneity of the elast is the | differentiation of the magnitude of the |

water: X-, zrepistrirvannyh in different

intervals in phyto-mation mommanty yremem | H, and. The shortage of 1M1 of 1n st-nоs allowance is that the details of the research (varying variability. T | rebuyer et ete. Another significant disadvantage of the well-known method is that it is impossible in principle to separate the effects of B101CCT | a1Deeds of pressure in various layers due to their interference. Therefore, it was possible to develop a more technologically effective way of studying non-international extrusions ino As a result of theoretical m-model works carried out in the USSR and abroad, a relationship was established between the main acoustic, Parameters, and “saturated mopniCTbix media (Cf ,, Cg, a) and the differential pressure (Pr - praa) applied “THIS MEDIUM. In particular, it is established that an increase in the reservoir pressure (three s-adannom mining and occurrence) leads to a decrease in the speed of 1 and an increase in the swelling of the longitudinal and transverse VOL.N. At STOiM, the relative measurement of the synergy of the pressure at 10 atm is 10 kV and percent, and the replacement of the population factors is hundreds of percent.

It is proposed for a detailed study of: and | non-international T |

Plasto: The pressure in lasters of different transmittance or of different saturation is restored with the use of sism, therefore, the differential pressure in the plastic layer (layer) must also change in the wedge of the IOT 1Pr | thickness of the layer (the surface and the surface) and the wall surface layer. (the speed is distributed acoustic) waves Vp, Vs and attenuation of the amplitude of the signals a, "" (depending on the differential pressure, then their harmonic in time must be a function of the permeability of the seams (layers);

flCP- - f I / G

- - rinp I, pr

dt

dt

where t is Brem from pressure recovery.

The proposed method of pre-creation of a depression or rbpr) of the Hia reservoir with both an open face and a cased well (With a perforated, reformer, coloin). Dria reservoir, ger aerated mouth of the well (I1NY.

Pr1I: measures. Determination of heterogeneity by npOHiHHaeMOCTH is performed by the following SbracM. In the sivazhinu, perforated in the interval of the reservoir, with a uniform saturation (oil or water), watch the instrument acouotic logging. Then, in the well, a depressure is created on the formation of several tens () vtm.ospheres, and within a few hours, several Cr1ykh in power are fixed with time lag, aP (0, where is CP, are the velocities and attenuation coefficients of 1p. Longitudinal and transverse waves Allevelly, in order to control porosity from Menevije in the process of restoring pressure, is measured by the method of neutron gamma-1kar | Otazh.

After amendment to change the loriosis for phycoravagant points of the formation

dC da

get the curves -jj; - that function dt

d (Pr - Prpl)

curves -

.nally connected

dt

d (p. - npnj,)

By comparing the curves

at dd

On each point of the reservoir, “inert formation inhomogeneities and permeability are built.

In the process of 1 pressure recovery, the formation porosity may change, leading to a change in acoustic parameters (for

iaaMaHeHiHfl account ozhmaem-os (gi layer).

In this connection, for introducing nanpaiBOK to the exclusion of 1porostosti, it proposes an iopower "B1" (a method that is sensitive to pressure from 1k: porosity, for example

neigg.rovny logging.

Determining the inhomogeneity in saturation is produced by comparing the irregularity profile of PLAst on P1 permeability of OGRGRI obtained at the beginning of operation under conditions of uniform saturation, with the heterogeneity profile of the reservoir, obtained at the considered moment of operation, when the reservoir saturation is changed.

Subject invention

1. Staos and oil and gas bearing land

layers, in which in ck: Bazh1I1ne-create a positive or negative depression

on the reservoir and measure in | pr 0 | process

differential pressure recovery

in time, distinguished by the term

detailed study. and formation heterogeneity

permeability, in the process of restoring the duffer inflowing pressure R IBO time neolvolno times the speed and absorption of the VUL1N reservoir in the reservoir and in the comparison of the scientific data determine the permeability of the reservoir.5 2. Method 1 of claim 1, which differs from that, in order to study formation inhomogeneity according to saturation 6, the reservoir imbalance and permeability ib of the operation level under conditions of uniform saturation are determined, then the formation’s non-heterogeneity according to the permeability ib of the operation process this saturation, and the results of both of 1M1 "are found.