RU2244823C1 - Method for monitoring underground placement of liquid industrial waste in deep water-bearing horizons - Google Patents

Abstract

FIELD: oil and gas extractive industry.

SUBSTANCE: method includes performing a test pumping of liquid waste into absorbing well before operational pumping, while changing flow step-by-step. From equation of absorption base hydrodynamic parameters are determined for calculation of predicted coefficients of operation characteristics of absorbing well and reserve well. During operational pumping of liquid waste together with thermometry along absorbing well shaft, registration of actual pressures and flow on pump devices, actual pressures on mouth in tubing pipes of absorbing well, actual pressures on face are additionally registered in absorbing well as well as pressures on mouth in behind-pipe space, actual loss at mouth in behind-pipe space, actual loss of waste on mouth, actual positions of face well, upper and lower limits of absorption range from well mouth. In reserve well actual pressures on face are registered, as well as actual positions of liquid level from reserve well mouth, upper and lower limits of absorption range. Prediction coefficients are compared for operation characteristics of absorbing well and reserve well to actual coefficients. 9 conditions of hydrodynamic bed conditions at reserve well and absorbing well are considered during pumping of waste. Specific actions of operator on each condition are described.

EFFECT: higher reliability and trustworthiness.

1 ex

Description

The invention relates to the oil and gas industry and is used in environmental monitoring of the underground disposal of liquid industrial wastes (LPO) in deep aquifers during the development of gas, gas condensate and oil fields, as well as in the operation of underground gas storages.

Analysis of the current level of technology showed the following:

- there is a known method for monitoring the underground location of ZhPO in deep aquifers using thermometry, resistivity metering, depth flow metering and re-monitoring of cementing with acoustic and other types of karatezha, as well as by systematic sampling of deep fluids, representing ZhPO or a mixture of ZhPO with formation water, from observational wells and their chemical analysis and registration of pressures on the units, in the annulus and the mouth of the absorbing well (see A. Gaev. Underground burial water at the enterprises of the gas industry. - L .: Nedra, 1981, p.125-142). This method uses a series of observation wells to monitor both the absorbing horizon and the overlying aquifers. Their number for one landfill of ZhPO can reach one or two dozen wells or more.

The disadvantage of this method is the low reliability of the assessment and the unreliability of monitoring, because the fact of the flow of ZhPO into the annular and annular space or upstream aquifers can be recorded only at the moment the ZhPO reaches the bottom of the observation wells, i.e. much later than the leakage itself (from several days to months). In addition, the method is cumbersome, voluminous and, therefore, non-operational, which significantly reduces its effectiveness;

- as a prototype, we took a method for monitoring the underground placement of ZhPO in deep aquifers, including periodic thermometry and flow rate measurements along the bore of the absorbing (injection) well, production injection of ZhPO into the absorbing well with recording of actual initial and current pressures on pump units, actual pressures at the mouth of tubing (tubing), annular and annular spaces of the absorbing well, a comparison of indicators, determining the state of technology the reliability of the injection system of the pumping units of the wells and the injection process of the ZhPO with the subsequent change in the injection regimes (see AS No. 1162950 of June 24, 1983, class E 21 V 43/14, published in OB 23, 1985)

The disadvantage of the described method is the inaccuracy and unreliability of monitoring, because the method is based on recording wellhead pressures (in tubing, annular and annular spaces), which do not reflect the actual picture of hydrodynamic changes in the absorbing formation. The temperature and mineralization of the injected ZhPO significantly distort the recorded values of wellhead pressures. According to experimental studies, it was found that the wellhead pressure in the tubing drops to 0.07 MPa at a well depth of 1000 m and an increase in the mineralization of ZhPO from 10 to 20 g / dm ³ . Wellhead annular and intercolumn pressures increase by 2.6 MPa with an increase in temperature in the well from 20 to 25 ° C and a decrease in the density of ZhPO with a salinity of 10 g / dm ³ from 1005.3 kg / m ³ to 1004.1 kg / m ³ . According to the prototype, it is argued that in the normal course of injection, wellhead pressures in the tubing, casing and intercolumn spaces of absorbing wells do not exceed the initial values, which contradicts both the theory and practice of underground hydrodynamics. Therefore, it is not always correct to state the authors of the described method that registering wellhead pressures above zero in annular and annular spaces indicates a pre-emergency or emergency state of injection. From the theory and practice of hydrodynamic research it is known that during the operation of wells, the pressure in them changes with constant hydrodynamic parameters of the reservoir. Therefore, the conclusion that the reliability of injection is indicated by the constancy of wellhead pressures is erroneous. The constancy of wellhead pressures over time in the tubing, according to the authors of the proposed method, indicates inter-reservoir flows of ZhPO, and a comparison of the current indicators of the injection process with the initial ones is unacceptable, because leads to false conclusions about the download status.

The technical result that can be obtained by carrying out the invention is as follows:

the reliability and reliability of monitoring the underground location of ZhPO in deep aquifers increases due to the inclusion in the monitoring system of a reserve well and the use of predicted performance indicators of both the absorbing and reserve wells, as well as the operational parameters of the absorbing formation, which will make it possible to assess the technical reliability of the pumping pump system units, absorbing and reserve wells, as well as the process of injection of ZhPO.

The technical result is achieved using a known method, including periodic thermometry along the bore of the absorbing well, the operational injection of the oil and gas products into the absorbing well with registration of actual pressures and costs at the pumping units, actual pressures at the mouth of the tubing of the absorbing well, comparison of indicators, determination of the state of technical reliability of the injection system pumping units for wells and the ZhPO injection process, followed by a change in the injection regimes. At the same time, the novelty of the claimed method lies in the fact that, in addition to the operational injection of ZhPOs, they carry out their trial injection into an absorbing well, changing the flow rate stepwise. According to the absorption equation known in hydrogeology, the initial hydrodynamic parameters are determined to calculate the predicted performance of the absorbing and reserve wells. In the process of production injection of ZhPO, the actual pressure at the bottom, the actual pressure at the wellhead in the annulus, the actual flow rate of the ZhPO at the mouth, and the actual position from the mouth of the bottom hole, the upper and lower boundaries of the absorption interval are additionally recorded in the absorbing well. Additionally, the actual bottomhole pressure, the actual position of the liquid level from the wellhead, and the upper and lower boundaries of the absorption interval are recorded in the reserve well. Next, they compare the predicted performance of the absorbing and reserve wells with the actual ones and consider the various conditions arising from this comparison with the recommendation of specific actions to the operator performing the injection of ZhPO.

A test injection with a stepwise change in flow rate is carried out to establish the absorption equation:

where R ° _PSpl is the natural reservoir pressure in the absorbing well prior to injection, MPa;

R ° _{PS zab} - bottomhole pressure during test injection in an absorbing well, MPa;

Q $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS mouth}}$ - the actual consumption of ZhPO at the mouth of the absorbing well during their test injection, m ³ / day;

a, b, c - empirical coefficients obtained by approximating the absorption curve (indicator curve).

Based on the absorption equation, the hydrodynamic parameters of the formation are determined, which are subsequently needed to calculate the predicted performance of the absorbing and reserve wells.

The maximum flow rate of ZhPO during their trial injection should be at least 60% of the design value, which is regulated by the “Provisional Instructions for Hydrodynamic Research of Formations and Wells” (approved by the Deputy Chairman of the State Committee for Fuel Industry S. Orudzhev April 28, 1963), VNII Moscow, 1963

From equation (1) calculate the coefficient of injectivity (K) of the absorbing well

Absorbing well

Calculation of predicted performance indicators of an absorbing well.

R $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS zab}}$ - forecast pressure at the bottom of the absorbing well, MPa.

R $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS zab}}$ - is a very important characteristic of the process of injection of ZhPO, because only it characterizes the processes occurring in the reservoir. The main changes in the reservoir during the injection of ZhPO into it are that a certain volume of ZhPO is forcibly introduced into the reservoir-reservoir, which replaces the produced water here, pushing them away from the absorbing well. This process is carried out by increasing the reservoir (bottomhole) pressure at the location of the absorbing well and the formation of the injection cone (repression) around it.

P $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS zab}}$ calculated by the formula

where R ° _{PS zab} - bottomhole pressure during test injection in an absorbing well, MPa;

Q $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS mouth}}$ - predicted consumption of ZhPO at the mouth of the absorbing well, m ³ / day;

kh / μ - reservoir hydraulic conductivity, m ³ / MPa · day;

k - permeability, m ² ;

h is the thickness of the reservoir, m;

μ is the viscosity of ZhPO, MPa · day;

R _to - contour of the effect of injection, m;

where χ is the piezoconductivity of the reservoir, m ² ;

t is the injection time, days;

r ₀ is the radius of the absorbing well, m

The hydrodynamic parameters of the formation (kh / μ, χ) are determined by the results of test injection.

The hydraulic conductivity of the formation (kh / μ) is determined by converting the dependence (3)

Formation thickness (h) is determined by standard or thermal logging data.

ZhPO viscosity (μ) is determined experimentally in the laboratory or from reference tables.

The piezoconductivity of the formation (χ) is also determined by the results of hydrodynamic studies according to the formula

where m is the porosity of the formation, share;

β _ZhPO , β _s - compressibility coefficient of ZhPO and the skeleton of the reservoir, MPa ^-1 .

From the above dependence (3) it can be seen that in the normal course of injection P $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS zab}}$ cannot be permanent. For constants k, h, μ, Q $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS mouth}}$ it grows due to an increase in R _k ; also its growth will be observed with increasing Q $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS mouth}}$ and / or μ, decreasing h and k.

R $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS mouth}}$ - predicted wellhead pressure in the tubing of the absorbing well, MPa.

It is determined by the following relationship:

where Δ P _Tr - pressure loss due to friction, MPa;

ρ is the average density of ZhPO along the wellbore, kg / m ³ ;

g is the acceleration of gravity, m ² / s;

N - the height of the fluid trunk in the absorbing well, m

where q $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS mouth}}$ - the predicted consumption of ZhPO at the mouth of the absorbing well, m ³ / day;

L is the length of the tubing of the absorbing well, m;

d is the inner diameter of the tubing, see

The density of ZhPO (ρ) depends on their salinity, pressure and temperature in the absorbing well

P = f (M, t, P).

The density of ZhPO (ρ) is determined experimentally in laboratory conditions at 20 ° C, calculated by empirical formulas or by measuring pressure in an absorbing well using dependence (7).

The height of the liquid column in the absorbing well (N) is determined by measuring its depth with a level gauge.

R $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS zat}}$ , R $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS eak}}$ , R $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS MK}}$ - predicted wellhead pressures in the annulus, annulus and annulus of the absorbing well.

If a packer is installed during the construction of the absorbing well, wellhead pressures in the indicated spaces of the absorbing well are zero.

If the packer is not installed, then the indicated pressures are determined by the formula

where H is the height of the liquid column in the absorbing well, m;

ρ is the density of the fluid filling the indicated spaces of the absorbing well, kg / m

Wellhead pressures in the annulus, annulus and annulus of the absorbing well will depend on the temperature of the fluid filling these spaces. With an increase in the temperature of the liquid filling these spaces, the indicated pressures will increase, and with a decrease in temperature, they will fall.

Q $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS mouth}}$ - predicted consumption of ZhPO at the mouth of the absorbing well, m ³ / day.

The value of the predicted flow rate of ZhPO at the mouth of the absorbing well is determined by the design of the landfill for underground placement of ZhPO.

L $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS zab}}$ - the predicted position of the bottom from the mouth of the absorbing well, m

The predicted position of the bottom should not exceed the lower limit of the absorption interval.

L $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS NG}}$ -L $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS VG}}$ - the predicted position of the lower and upper boundaries of the absorption interval of the absorbing well, m

The forecast position from the mouth of the upper boundary of the absorption interval of the absorbing well should not exceed the upper boundary of the perforation interval.

Actual performance of the absorbing well.

P $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS zab}}$ -actual bottomhole (reservoir) pressure of the absorbing well, MPa.

Downhole pressures are measured by depth gauges of various grades of the MSU type. MGN, etc.

R $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS tubing}}$ , P $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS zat}}$ , R $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS MK}}$ , R $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS zak}}$ - actual pressure at the mouth in the pump-compressor

pipes, in the annulus, annulus, annulus of the absorbing well, MPa. They are measured using technical or exemplary pressure gauges (MO class 04).

Q $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS mouth}}$ - the actual consumption of ZhPO at the mouth of the absorbing well, m ³ / day.

Determined by flow meters of various brands (or volumetric method).

L $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS zab}}$ - the actual position of the bottom of the absorbing well, m

It is determined by measuring the depth of stop when descending into the well of any deep tool.

L $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS NG}}$ -L $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS VG}}$ - the actual position of the lower and upper boundaries of the absorption interval, m

Determined by depth thermometry.

The onset of reservoir formation and a decrease in its effective thickness is recorded when the head of the sand plug at the bottom is raised above the lower boundary of the absorption interval.

Reserve well

When designing landfills for underground location of ZhPO at permanent enterprises (gas condensate, oil fields, underground gas storages), it is mandatory to have at least one reserve well in order to ensure uninterrupted injection of ZhPO.

It is proposed by the claimed method to include a standby well idle up to a certain point in the monitoring system for the underground placement of ZhPO. This makes it possible to increase the reliability of monitoring by clarifying the hydrodynamic parameters of the formation, not only by the method of test injection, but also by the methods of hydraulic monitoring of the reserve well.

Predicted performance indicators of a reserve well.

R $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PvS Zab}}$ - predicted bottomhole pressure in the reserve well, MPa.

where P $\genfrac{}{}{0ex}{}{\text{0}}{\text{PvS Zab}}$ - pressure at the bottom of the reserve well before injection, MPa;

Q $\genfrac{}{}{0ex}{}{\text{for}}{\text{RvC mouth}}$ - the predicted consumption of ZhPO at the mouth of the reserve well, m ³ / day;

R is the distance between the backup and absorbing wells, m

l $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PvS ur}}$ - the predicted value of the level in the reserve well, m from the mouth.

where N _RvS - depth measurement bottomhole pressure (P $\genfrac{}{}{0ex}{}{\text{f}}{\text{PvS Zab}}$ ), m;

ρ is the density of produced water, kg / m ³ .

L $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PvS Zab}}$ - forecasting position of the reserve well bottom, m.

The predicted position of the bottom should not exceed the lower limit of the absorption interval.

l $\genfrac{}{}{0ex}{}{\text{etc}}{\text{RvS NG}}$ -l $\genfrac{}{}{0ex}{}{\text{etc}}{\text{RVS VG}}$ - the predicted position of the lower and upper boundaries of the absorption interval of the backup well, m

The forecast position from the mouth of the upper boundary of the reserve interval of the backup well should not exceed the upper boundary of the perforation interval.

Actual performance of the reserve well.

P $\genfrac{}{}{0ex}{}{\text{f}}{\text{PvS Zab}}$ - the actual pressure at the bottom of the reserve well, MPa.

Measure with depth gauges of various brands (MGN, MSU).

l $\genfrac{}{}{0ex}{}{\text{f}}{\text{PvS Zab}}$ - the actual level from the wellhead in the standby well, m

Measure with a level gauge.

l $\genfrac{}{}{0ex}{}{\text{f}}{\text{PvC Zab}}$ - actual position from the mouth of the reserve of the reserve well, m

It is determined by measuring the depth of stop when descending into the well of any deep tool.

l $\genfrac{}{}{0ex}{}{\text{f}}{\text{RvS NG}}$ -l $\genfrac{}{}{0ex}{}{\text{f}}{\text{RVC VG}}$ - the actual position from the mouth of the lower and upper boundaries of the absorption interval of the backup well, m

Determined by depth thermometry.

Discharge units

Predicted performance indicators of injection units.

R $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS us}}$ - forecast pressure at the pump of the absorbing well, MPa.

It is determined by the passport characteristic of the pump unit.

The pressure drop on the feed pump indicates a rupture of the feed ZhPO pipeline. The increase in pressure of the supply pipe is equal to the increase in the predicted pressure at the mouth of the absorbing well in the tubing.

Q $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS us}}$ - predicted consumption of ZhPO at the pump of the absorbing well, m ³ / day.

It is determined by the project of the landfill for underground placement of ZhPO.

A decrease in the ZhPO flow rate testifies to partial formation mudding, and its increase may be associated with a rupture of the supply pipeline.

Actual performance indicators of injection units.

R $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS us}}$ - the actual pressure at the pump of the absorbing well, MPa.

It is measured by standard or technical manometers.

Q $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS us}}$ - the actual consumption of ZhPO at the pump of the absorbing well, m ³ / day.

It is measured by a flowmeter.

In the process of operating the landfill for underground placement of ZhPO in deep aquifers, the predicted and actual characteristics of the absorbing and reserve wells are compared, if they are equal, they note the absence of structural violations of the absorbing well: tubing, annulus, annulus and annulus, i.e. interstratal flows are absent.

On condition:

P $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS zat}}$ > P $\genfrac{}{}{0ex}{}{\text{np}}{\text{PS shut}}$ ; R $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS zat}}$ ≥ P $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS tubing}}$ ;

R $\genfrac{}{}{0ex}{}{\text{f}}{\text{PvS Zab}}$ = const; l $\genfrac{}{}{0ex}{}{\text{f}}{\text{PvS ur}}$ = l $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PvS ur}}$

reveal the design violation of the absorbing well.

On condition:

P $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS us}}$ <P $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS us}}$ ; Q $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS us}}$ ≥ Q $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS us}}$ ;

R $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS Zab}}$ <P $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS zab}}$ : R $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS tubing}}$ <P $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS tubing}}$

reveal a violation of the tightness of the supply pipe.

On condition:

L $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS zab}}$ ≤ L $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS zab}}$ ; L $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS zab}}$ ≥ L $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS NG}}$ ;

L $\genfrac{}{}{0ex}{}{\text{F}}{\text{PS VG}}$ = L $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS VG}}$

reveal the beginning of the formation of sedimentation sediments ZhPO.

On condition:

R $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS us}}$ > P $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS us}}$ ; Q $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS mouth}}$ <Q $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS mouth}}$ ;

R $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS zab}}$ > P $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS zab}}$ ; R $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS tubing}}$ > P $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS tubing}}$ ,

L $\genfrac{}{}{0ex}{}{\text{F}}{\text{PS zab}}$ <L $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS NG}}$ ; L $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS VG}}$ ≥ L $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS VG}}$

revealing partial mudding of the reservoir, a decrease in the injectivity of the absorbing well.

On condition:

P $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS us}}$ > P $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS us}}$ ; R $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS zab}}$ > P $\genfrac{}{}{0ex}{}{\text{etc}}{\text{Ns zab}}$ ;

R $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS tubing}}$ > P $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS tubing}}$ ; Q $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS mouth}}$ ≤ Q $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS mouth}}$ ;

R $\genfrac{}{}{0ex}{}{\text{f}}{\text{PvS Zab}}$ > P $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PvS Zab}}$ ; l $\genfrac{}{}{0ex}{}{\text{f}}{\text{PvS ur}}$ ≤ l $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PvS ur}}$ ;

L $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS zab}}$ ≥ L $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS NG}}$ ; L $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS VG}}$ = L $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS VG}}$ ;

L $\genfrac{}{}{0ex}{}{\text{F}}{\text{PS NG}}$ = L $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS NG}}$ ; l $\genfrac{}{}{0ex}{}{\text{f}}{\text{PvS Zab}}$ > l $\genfrac{}{}{0ex}{}{\text{f}}{\text{RvS NG}}$

reveal the full formation of the formation and the lack of communication of the absorbing well with the formation.

On condition:

R $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS zab}}$ <P $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS zab}}$ ; R $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS tubing}}$ <P $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS tubing}}$ ;

R $\genfrac{}{}{0ex}{}{\text{f}}{\text{PvS Zab}}$ <P $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PvS}}$ ; L $\genfrac{}{}{0ex}{}{\text{f}}{\text{PvC ur}}$ > l $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PvS ur}}$ ;

L $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS zab}}$ ≥ L $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS NG}}$ ; L $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS VG}}$ = L $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS VG}}$ ;

L $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS NG}}$ = L $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS NG}}$

reveal a change in the hydrodynamic parameters of the formation towards their improvement.

On condition:

R $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS zab}}$ <P $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS zab}}$ ; P $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS tubing}}$ <P $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS NKT}}$ ;

R $\genfrac{}{}{0ex}{}{\text{f}}{\text{PvS Zab}}$ <P $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PvS Zab}}$ ; l $\genfrac{}{}{0ex}{}{\text{f}}{\text{RvS NG}}$ > l $\genfrac{}{}{0ex}{}{\text{etc}}{\text{RvS NG}}$

reveal the formation of annular or intercolumn flows.

On condition:

R $\genfrac{}{}{0ex}{}{\text{f}}{\text{PvS Zab}}$ = const ≠ P $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PvS Zab}}$ ;

l $\genfrac{}{}{0ex}{}{\text{f}}{\text{PvC ur}}$ = const ≠ l $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PvC ur}}$ ;

l $\genfrac{}{}{0ex}{}{\text{f}}{\text{RvS NG}}$ <l $\genfrac{}{}{0ex}{}{\text{etc}}{\text{RVS VG}}$

reveal the lack of communication with the reserve well reservoir, because the well does not respond to the injection of ZhPO.

The analysis of patent documentation and scientific and technical literature showed that the test injection of liquid-propellant materials into the absorbing well is known, as well as the mathematical expression of the absorption equation itself (see Hydrogeological studies to substantiate the underground burial of industrial effluents / State Geological Enterprise “Hydrospetsgeologiya”; edited by V. A. Grabovnikova. -M .: Nedra, 1993, p.125). We have not identified technical solutions that are based on features that coincide with the rest of the distinctive features of the claimed technical solution. Thus, the essential features claimed by us do not follow explicitly from the analyzed prior art, i.e. have an inventive step.

In more detail, the essence of the claimed invention is described by the example of modeling the organization of a monitoring system for the underground distribution of wastewater from the Yamsoveisk gas condensate field (YAGKM).

The effluents generated during gas and gas condensate gas production contain such unusual components as triethylene glycol, methanol, petroleum products, phenols, etc.

For their injection, a test site consisting of two deep wells is used: absorbing 1P -1273 m and reserve 2P -1270 m.

The discharge of industrial wastewater in the amount of 160 m ³ / day is carried out within the Yamsoveyskaya structure, which is a dome-shaped elevation, directly beneath the Cenomanian gas reservoir 110 m below the gas-water contact, into its bottom.

At present, in connection with the construction and subsequent commissioning of a booster compressor station, the total volume of liquid industrial waste from nuclear fuel can increase to 310 m ³ / day.

We have found that the 1P absorbing well is able to receive ZhPO with a flow rate of 310 m ³ / day during repression to the reservoir at the end of the landfill life (after 22 years) of 6.45 MPa.

Before the start of the operation of the landfill for the underground location of ZhPO at the YAGKM, they were tested in five modes with a stepwise varying rate of ZhPO consumption: 198, 347, 464, 640, 716 m ³ / day. In this case, the repression of the bottomhole pressure was respectively: 4.32; 5.47; 5.57; 5.79; 5.80 MPa. The design flow rate of ZhPO at the nuclear gas condensate field is 310 m ³ / day.

According to the data obtained, the absorption equation (1) is established:

R ° _{PS pl} -R ° _{PS zab} = 9 * 10 ^-6 * (Q $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS mouth}}$ ) ² -0.011 * Q $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS mouth}}$ -2.79

Based on these studies, the hydrodynamic parameters of the formation were determined:

a) hydraulic conductivity k * h / μ = 6.32 * 10 ^-3 m ³ / MPa * s;

b) piezoconductivity χ = 23.9 * 10 m ² / day.

Calculate the predicted performance of the absorbing well 1P.

R $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS zab}}$ -the predicted bottomhole pressure in the 1P well in the initial period of operation is calculated by the formula (1):

R $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS zab}}$ = 11.18-9 · 10 ^-6 · 310 ² + 0.011 · 310 + 2.79 = 16.51 MPa

Moreover, 11.18 MPa (P $\genfrac{}{}{0ex}{}{\text{0}}{\text{PS zab}}$ ) -the value of the bottomhole (reservoir) pressure at the time before the start of operation of the landfill at a depth of 1210 m.

Downhole pressure in the 1P well should change over time. For example, after a year of operating landfill R $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS zab}}$ will make

Predicted wellhead pressure in the tubing at the time the landfill begins operation is calculated by the formula (7)

R $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS zab}}$ = 11.18 + (16.51-11.18) + 0.026-1210 * 9.8 * 10 ^-3 = 4.65 MPa;

friction pressure loss is calculated by the formula (8)

AR _mp = 2.256 * 10 ^-5 * 310 ² * 1210 / 11.45 = 0.026 MPa;

after a year of landfill operation, the predicted wellhead pressure in the tubing will be

R $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS zat}}$ = P $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS zak}}$ = P $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS MK}}$ = 0, because 1P is injected into the well through the tubing with the installation of a packer.

Q $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS mouth}}$ = 310 m ³ / day;

L $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS zab}}$ = 1250 m;

L $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS NG}}$ -L $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS VG}}$ = 1163-1218 m (according to the results of deep thermometry).

Calculate the predicted performance of the reserve wells 2P.

Predicted bottomhole pressure in the reserve well 2P at the time the landfill began operation

R $\genfrac{}{}{0ex}{}{\text{etc}}{\text{Pvc Zab}}$ = 11.23 MPa

The distance between the wells 1P and 2P is 100 m.

The forecast value of the level in the reserve well 2P after the year of operation of the test site is calculated by the formula (11)

from the mouth;

l $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PvS Zab}}$ = 1252 m;

l $\genfrac{}{}{0ex}{}{\text{etc}}{\text{RvS NG}}$ -l $\genfrac{}{}{0ex}{}{\text{etc}}{\text{RVS VG}}$ = 1181-1237 m (according to the results of depth thermometry).

Predicted performance indicators of injection units.

R $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS us}}$ = 6 MPa;

Q $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS us}}$ = 310 m ³ / day.

The following example provides data on the predicted and actual values of the operational characteristics of the 1P absorbing well, 2P standby well and injection units for various injection conditions.

In the normal course of injection, the actual operational characteristics of the absorbing well 1P and the reserve well 2P will be equal to the forecast and by the end of the 1st year of operation will amount to:

a) parameters on injection units

R $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS us}}$ = P $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS us}}$ = 6 MPa; Q $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS us}}$ = Q $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS us}}$ = 310 m ³ / day;

b) parameters on the 1P absorbing well

Q $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS mouth}}$ = Q $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS mouth}}$ = 310 m ³ / day; R $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS zab}}$ = P $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS zab}}$ = 17.48 MPa;

R $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS tubing}}$ = P $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS tubing}}$ = 5.61 MPa; R $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS zat}}$ = P $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS zat}}$ = 0;

R $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS zak}}$ = P $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS zak}}$ = 0; R $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS MK}}$ = P $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS MK}}$ = 0; L $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS zab}}$ = L $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS zab}}$ = 1250 m;

L $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS NG}}$ -L $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS VG}}$ = L $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS NG}}$ -L $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS VG}}$ = 1163-1218 m;

c) parameters on the reserve well 2P

P $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PvC ear}}$ = P $\genfrac{}{}{0ex}{}{\text{f}}{\text{PvC ear}}$ = 11.52 MPa;

l $\genfrac{}{}{0ex}{}{\text{etc}}{\text{RvS ur}}$ = l $\genfrac{}{}{0ex}{}{\text{f}}{\text{RvS ur}}$ = 41 m;

l $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PvS Zab}}$ = l $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PvS Zab}}$ = 1252 m;

l $\genfrac{}{}{0ex}{}{\text{etc}}{\text{RvS NG}}$ -l $\genfrac{}{}{0ex}{}{\text{etc}}{\text{RVS VG}}$ = l $\genfrac{}{}{0ex}{}{\text{f}}{\text{RvS NG}}$ -l $\genfrac{}{}{0ex}{}{\text{f}}{\text{RVS VG}}$ = 1181-1237 m.

Downloading continues.

On condition

P $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS zat}}$ > P $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS t}}$ = 5.61> 0

R $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS zat}}$ ≥ P $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS tubing}}$ = 5.61 MPa and the immunity of the remaining parameters, there is a violation of the tightness of the packer of the 1P well, the injection into the 1P well is stopped, the flow of ZhPO is transferred to the reserve well 2P, the well 1P is repaired.

On condition

R $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS us}}$ <P $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS us}}$ = 5.3 <6.0; Q $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS us}}$ ≥ Q $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS us}}$ = 360>310;

P $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS zab}}$ <P $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS zab}}$ = 15.00 <17.48; P $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS tubing}}$ <P $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS tubing}}$ = 3.0 <5.61

reveal a rush of the supply pipe and leakage of the oil-water supply to the surface. The injection into well 1P is stopped, the flow of ZhPO is transferred to the reserve pipeline, the place of the rush is established and eliminated, the consequences of the ZhPO spill are eliminated.

On condition

L $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS zab}}$ ≤ L $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS zab}}$ = 1220 <1250;

L $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS Zab}}$ ≥ L $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS NG}}$ = 1220>1218;

L $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS VG}}$ = L $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS VG}}$ = 1163 m.

Moreover, in the case of P $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS zab}}$ = P $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS zab}}$ = 18.20 = 18.20, P $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS tubing}}$ = P $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS tubing}}$ = 4.00 = 4.00. The onset of formation mudding by the sediments of the ZhPO is revealed, the compatibility of the ZhPO with the produced water is additionally assessed and, with satisfactory compatibility, the injection is continued. In the case of P $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS zab}}$ > P $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS Zab}}$ = 18.00> 17.48, P $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS tubing}}$ > P $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS tubing}}$ = 6.20> 5.61. They stop the injection of ZhPO into the 1P well, transfer the ZhPO flow to the reserve pipeline and restore the injectivity of the well.

On condition

P $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS us}}$ > P $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS us}}$ = 6.7>6.0; Q $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS mouth}}$ <Q $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS us}}$ = 250 <310;

P $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS zab}}$ > P $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS zab}}$ = 18.00>17.48; R $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS tubing}}$ > P $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS tubing}}$ = 6.20> $ 5.61

L $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS zab}}$ <L $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS NG}}$ = 1208 <1250;

L $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS VG}}$ ≥ L $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS VG}}$ = 1218>1208;

when pressure increases at the pump, at the bottom and mouth of the tubing of the 1P absorbing well, lowering the injection rate and raising the bottom position above the lower boundary of the absorption interval, the ZHPO is stopped in the 1P well, the ZhPO flow is transferred to the 2P well, the sand plug is removed from the bottom of the 1P well, work to restore the injectivity of the reservoir.

On condition

P $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS us}}$ > P $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS us}}$ = 6.7>6.0; P $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS zab}}$ > P $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS zab}}$ = 18.00>17.48;

P $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS tubing}}$ > P $\genfrac{}{}{0ex}{}{\text{etc}}{\text{Substation HKT}}$ = 6.0>5.61; Q $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS mouth}}$ ≤ Q $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS us}}$ = 280 <310;

R $\genfrac{}{}{0ex}{}{\text{f}}{\text{PvS Zab}}$ > P $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PvS Zab}}$ = 18.20>17.48;

l $\genfrac{}{}{0ex}{}{\text{f}}{\text{RvS ur}}$ ≤ l $\genfrac{}{}{0ex}{}{\text{etc}}{\text{RvS ur}}$ = 23 <41;

L $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS zab}}$ ≥ L $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS NG}}$ = 1218>1208; L $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS VG}}$ = L $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS VG}}$ = 1163 m;

L $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS NG}}$ = L $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS NG}}$ = 1218; l $\genfrac{}{}{0ex}{}{\text{f}}{\text{PvS ear}}$ > l $\genfrac{}{}{0ex}{}{\text{f}}{\text{RvS NG}}$ = 1240>1230;

The complete formation mudding and the lack of connection of the 1P absorbing well with the formation were revealed.

The ZhPO injection into the 1P well is stopped, and the 1P well is being overhauled.

On condition

P $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS zab}}$ <P $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS zab}}$ = 16.5 <17.48; R $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS tubing}}$ <P $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS tubing}}$ = 4.00 <5.61;

P $\genfrac{}{}{0ex}{}{\text{f}}{\text{PvC Zab}}$ <P $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PvS Zab}}$ = 11.40 <11.52; l $\genfrac{}{}{0ex}{}{\text{f}}{\text{RvS ur}}$ > l $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PvC ur}}$ = 53>41;

L $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS zab}}$ ≥ L $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS NG}}$ = 1250>1218; L $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS VG}}$ = L $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS VG}}$ = 1163;

L $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS NG}}$ = L $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS NG}}$ = 1218;

reveal a change in hydrodynamic parameters in the direction of their improvement, because the repression cone reached the zone of improved hydrodynamic parameters.

On condition

P $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS zab}}$ <P $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS zab}}$ = 16.0 <17.48; R $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS tubing}}$ <P $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS tubing}}$ = 3.8 <5.61;

P $\genfrac{}{}{0ex}{}{\text{f}}{\text{PvC Zab}}$ <P $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PvS Zab}}$ = 11.23 <11.52; l $\genfrac{}{}{0ex}{}{\text{f}}{\text{PvS}}$ _NG > l $\genfrac{}{}{0ex}{}{\text{etc}}{\text{RvS NG}}$ = 1237>1230;

reveal the formation of annular or intercolumn flows. The injection into the well 1P is stopped, the flow of ZhPO is transferred to the well 2P. They carry out special work to establish the location of the overflow of ZhPO and its elimination.

On condition

R $\genfrac{}{}{0ex}{}{\text{f}}{\text{PvS Zab}}$ = const ≠ P $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PvS Zab}}$ = 11.72 MPa;

l $\genfrac{}{}{0ex}{}{\text{f}}{\text{RvC ur}}$ = const ≠ l $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PvS ur}}$ = 20 m from the mouth.

It is revealed that there is no connection with the formation in the reserve well 2P. It needs to be restored by removing sand plugs. The operation is possible without stopping the injection of ZhPO into the well 1P.

Thus, the use of forecast data in the monitoring system for the underground placement of ZhPO allows us to anticipate (prevent) possible emergency situations and make the monitoring system more operational, flexible, environmentally friendly and economically more profitable, because does not require the construction of observation wells.

The claimed technical solution meets the criterion of patentability, namely, the condition of novelty, inventive step and industrial applicability.

Claims (1)

A method for monitoring the underground placement of liquid industrial wastes in deep aquifers, including periodic thermometry along the wellbore of an absorbing well, production injection of liquid industrial wastes (ZhPO) into an absorbing well with recording of actual pressures and costs at pumping units, actual pressures at the wellhead in the pump compressor pipes (tubing) of an absorbing well, comparing indicators, determining the state of technical reliability of a pumping system well operators and the ZhPO injection process with subsequent change in the injection regimes, characterized in that, in addition to the ZhPO operational injection, they are tested for their injection into the absorbing well, changing the flow rate stepwise, and the initial hydrodynamic parameters are determined by the absorption equation to calculate the predicted performance of the absorbing and reserve wells, and during the operational injection of ZhPO, the actual pressure at the bottom is additionally recorded in the absorbing well, actual the pressure at the wellhead in the annulus, the actual flow rate of ZHPO at the wellhead, the actual position from the wellhead of the bottom hole, the upper and lower boundaries of the absorption interval, as well as in the standby well, the actual pressure at the bottom, the actual position of the liquid level from the wellhead, upper and lower the boundaries of the absorption interval, in this case, the predicted performance indicators of the absorbing and reserve wells are compared with the actual ones and, if they are equal, they continue to pump the ZhPO into the absorbing well, and at lovii R $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS zat}}$ > P $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS zat}}$ ; R $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS zat}}$ = P $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS tubing}}$ ; R $\genfrac{}{}{0ex}{}{\text{f}}{\text{PvS Zab}}$ = const; l $\genfrac{}{}{0ex}{}{\text{f}}{\text{PvS ur}}$ = l $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PvS ur}}$ , where p $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS zat}}$ - the actual pressure at the mouth in the annulus of the absorbing well, MPa; P $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS zat}}$ - forecast pressure at the mouth in the annulus of the absorbing well, MPa; R $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS tubing}}$ - the actual pressure at the mouth of the absorbing well in the tubing, MPa; R $\genfrac{}{}{0ex}{}{\text{f}}{\text{PvS Zab}}$ - actual bottomhole pressure in the reserve well, MPa; l $\genfrac{}{}{0ex}{}{\text{f}}{\text{PvS ur}}$ - the actual position of the liquid level from the level in the reserve well, m; l $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PvS ur}}$ - the predicted position of the liquid level from the wellhead in the reserve well, m, they stop the injection of ZhPO into the absorbing well, transfer the flow of ZhPO to the reserve well, establish the cause of the depressurization of the annulus and eliminate it, provided R $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS us}}$ <P $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS us}}$ ; Q $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS us}}$ ≥ Q $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS us}}$ ; R $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS zab}}$ <P $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS zab}}$ ; R $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS tubing}}$ <P $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS tubing}}$ , where P $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS us}}$ - the actual pressure at the pump, pumping the ZhPO into the absorbing well, MPa; P $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS us}}$ - predicted pressure at the pump injecting the ZhPO into the absorbing well, MPa; Q $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS us}}$ - the actual flow rate at the pump, pumping ZhPO into the absorbing well, m ³ / day; Q $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS us}}$ - predicted flow rate at the pump that injects the ZhPO into the absorbing well, m ³ / day; P $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS Zab}}$ - the actual pressure at the bottom of the absorbing well, MPa; P $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS zab}}$ - forecast pressure at the bottom of the absorbing well, MPa; R $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS tubing}}$ - forecast pressure at the mouth of the absorbing well in the tubing, MPa, stop the ZhPO injection into the absorbing well, transfer the ZhPO flow to the reserve pipeline, establish the cause of the depressurization of the supply pipeline and eliminate it, provided L $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS zab}}$ ≤ L $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS zab}}$ ; L $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS zab}}$ ≥ L _{PS NG} ; L $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS VG}}$ = L $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS VG}}$ , where l $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS Zab}}$ - the actual position of the bottom from the mouth of the absorbing well, m; L $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS zab}}$ - the predicted position of the bottom from the mouth of the absorbing well, m; L $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS NG}}$ - the actual position from the mouth of the lower boundary of the absorption interval of the absorbing well, m; L $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS VG}}$ - the actual position from the mouth of the upper boundary of the absorption interval of the absorbing well, m; L $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS VG}}$ - the forecast position from the mouth of the upper boundary of the absorption interval of the absorbing well, m, in the case of P $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS zab}}$ = P $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS zab}}$ ; R $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS tubing}}$ = P $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS tubing}}$ continue to pump in the absorbing well, in case of P $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS zab}}$ > P $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS zab}}$ ; R $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS tubing}}$ > P $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS tubing}}$ stop the injection of ZhPO into the absorbing well, transfer the flow of ZhPO to the reserve well and restore the injectivity of the well, on condition R $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS us}}$ > P $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS us}}$ ; Q $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS mouth}}$ <Q $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS mouth}}$ ; R $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS zab}}$ > P $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS zab}}$ ; R $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS tubing}}$ > P $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS tubing}}$ ; L $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS zab}}$ <L $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS NG}}$ ; L $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS VG}}$ ≥ L $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS VG}}$ , where q $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS mouth}}$ - the actual consumption of ZhPO at the mouth of the absorbing well, m ³ / day; Q $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS mouth}}$ - the forecast consumption of ZhPO at the mouth of the absorbing well, m ³ / day, stop the injection of ZhPO into the absorbing well, transfer the ZhPO flow to the reserve well and restore the injectivity of the well, on condition R $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS us}}$ > P $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS us}}$ ; R $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS zab}}$ > P $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS zab}}$ ; R $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS tubing}}$ > P $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS tubing}}$ ; Q $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS mouth}}$ ≤ Q $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS mouth}}$ ; R $\genfrac{}{}{0ex}{}{\text{f}}{\text{PvS Zab}}$ > P $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PvS Zab}}$ ; l $\genfrac{}{}{0ex}{}{\text{f}}{\text{PvS ur}}$ ≤ l $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PvS ur}}$ ; L $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS zab}}$ ≥ L $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS NG}}$ ; L $\genfrac{}{}{0ex}{}{\text{F}}{\text{PS VG}}$ = L $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS VG}}$ ; L $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS NG}}$ = L $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS NG}}$ ; l $\genfrac{}{}{0ex}{}{\text{f}}{\text{PvS Zab}}$ > l $\genfrac{}{}{0ex}{}{\text{f}}{\text{RvS NG}}$ , where p $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PvS Zab}}$ - forecast pressure at the bottom of the reserve well, MPa; L $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS NG}}$ - forecast position from the mouth of the lower boundary of the absorption interval of the absorbing well, m, l $\genfrac{}{}{0ex}{}{\text{f}}{\text{PvS Zab}}$ - the actual position of the bottom from the mouth of the reserve wells, m; l $\genfrac{}{}{0ex}{}{\text{f}}{\text{RvS NG}}$ - the actual position from the mouth of the lower boundary of the absorption interval of the backup well, m, stop the ZhPO injection into the absorbing well, transfer the ZhPO flow to the reserve well, overhaul the absorbing well, on condition R $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS zab}}$ <P $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS zab}}$ ; R $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS tubing}}$ <P $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS tubing}}$ ; R $\genfrac{}{}{0ex}{}{\text{f}}{\text{PvS Zab}}$ <P $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PvS}}$ ; l $\genfrac{}{}{0ex}{}{\text{f}}{\text{PvS ur}}$ > l $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PvS ur}}$ ; L $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS zab}}$ ≥ L $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS NG}}$ ; L $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS VG}}$ = L $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS VG}}$ ; L $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS NG}}$ = L $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS NG}}$ , re-calculate the predicted indicators of the absorbing and reserve wells, compare the latter with the actual ones and, in case of equality of values, continue to pump the oil and gas products into the absorbing well, and upon receipt of the previous conditions, the technological operations are repeated, on condition R $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS zab}}$ <P $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS zab}}$ ; R $\genfrac{}{}{0ex}{}{\text{f}}{\text{PS tubing}}$ <P $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PS tubing}}$ ; R $\genfrac{}{}{0ex}{}{\text{f}}{\text{PvS Zab}}$ <P $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PvS Zab}}$ ; l $\genfrac{}{}{0ex}{}{\text{f}}{\text{RvS NG}}$ > l $\genfrac{}{}{0ex}{}{\text{etc}}{\text{RvS NG}}$ , where l $\genfrac{}{}{0ex}{}{\text{etc}}{\text{RvS NG}}$ - the forecast position from the mouth of the lower boundary of the absorption interval of the backup well, m, stop the pumping of the ZhPO into the absorbing well, transfer the flow of ZhPO to the reserve well and eliminate the annular flow in the absorbing well, on condition R $\genfrac{}{}{0ex}{}{\text{f}}{\text{PvS Zab}}$ = const ≠ P $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PvC Zab}}$ ; l $\genfrac{}{}{0ex}{}{\text{f}}{\text{PvS ur}}$ = const ≠ l $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PvS ur}}$ ; l $\genfrac{}{}{0ex}{}{\text{f}}{\text{RvS NG}}$ <l $\genfrac{}{}{0ex}{}{\text{etc}}{\text{PvC VG}}$ , where l $\genfrac{}{}{0ex}{}{\text{etc}}{\text{RVS VG}}$ - the predicted position from the mouth of the upper boundary of the absorption interval of the backup well, m, continue to pump the ZhPO into the absorbing well, and the backup well is being repaired.