CN112082945A - Prediction device and method for mobility of water layer water body of gas reservoir and controller - Google Patents
Prediction device and method for mobility of water layer water body of gas reservoir and controller Download PDFInfo
- Publication number
- CN112082945A CN112082945A CN201910509174.3A CN201910509174A CN112082945A CN 112082945 A CN112082945 A CN 112082945A CN 201910509174 A CN201910509174 A CN 201910509174A CN 112082945 A CN112082945 A CN 112082945A
- Authority
- CN
- China
- Prior art keywords
- pressure
- water
- pump
- core holder
- confining
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 187
- 238000000034 method Methods 0.000 title claims abstract description 44
- 238000002347 injection Methods 0.000 claims abstract description 96
- 239000007924 injection Substances 0.000 claims abstract description 96
- 239000011435 rock Substances 0.000 claims abstract description 78
- 239000008398 formation water Substances 0.000 claims abstract description 40
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 22
- 230000009467 reduction Effects 0.000 claims abstract description 9
- 238000004590 computer program Methods 0.000 claims description 16
- 229920006395 saturated elastomer Polymers 0.000 claims description 9
- 238000012544 monitoring process Methods 0.000 claims description 6
- 238000011161 development Methods 0.000 abstract description 15
- 230000008569 process Effects 0.000 abstract description 15
- 238000010586 diagram Methods 0.000 description 13
- 230000006870 function Effects 0.000 description 6
- 238000011160 research Methods 0.000 description 6
- 230000008859 change Effects 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 238000001035 drying Methods 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 238000004088 simulation Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000009545 invasion Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000037081 physical activity Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N19/00—Investigating materials by mechanical methods
- G01N19/10—Measuring moisture content, e.g. by measuring change in length of hygroscopic filament; Hygrometers
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention provides a prediction device, a method and a controller for water mobility of a water layer of a gas reservoir, wherein the device comprises: a core holder having a first space and a second space; the first space is used for placing a rock sample to be predicted; the second space is enclosed outside the first space; the confining pressure pump is used for pressurizing the rock sample to be predicted by injecting pressure into the second space; the high-pressure injection pump is used for injecting simulated formation water in the middle container into the rock core holder; the back pressure pump is used for injecting pressure to the core holder; the controller is used for controlling the high-pressure injection pump and the back-pressure pump to pressurize two ends of the core holder after the confining pressure reaches a preset confining pressure value; and when the pressure at the two ends reaches a set value of the formation pressure and is not changed, the high-pressure injection pump is controlled to be closed, the back-pressure pump is controlled to reduce the pressure, and the mobility of the water body is predicted according to the water yield under each pressure reduction value. The scheme realizes quantitative prediction of water layer water mobility in the gas reservoir development process, and has important guiding significance for gas reservoir development.
Description
Technical Field
The invention relates to the technical field of oil and gas field development, in particular to a prediction device, a prediction method and a prediction controller for water mobility of a water layer of a gas reservoir.
Background
The gas reservoir water body is formed in gas reservoir rock pores, in the gas reservoir exploitation process, pressure difference can be generated between the water body and the gas reservoir along with the reduction of the gas reservoir pore pressure, the water body flows under the action of water body expansion energy and pressure difference displacement force and invades into the gas reservoir, the productivity and the recovery rate of the gas reservoir are greatly reduced, and the gas reservoir development effect is influenced, so that the mobility prediction of the water body is significant for the gas reservoir development.
The method mainly comprises the steps of calculating water invasion by using production dynamic data or using a material balance equation, analyzing and predicting water invasion dynamics and the like. The research does not directly research the mobility of the gas reservoir water body, and the water body characteristics such as the water body activity, the lower flow limit and the flow rule are difficult to be clarified.
In view of the above problems, no effective solution has been proposed.
Disclosure of Invention
The embodiment of the invention provides a prediction device of water mobility of a water layer of a gas reservoir, which is used for quantitatively predicting the water mobility of the water layer in the gas reservoir development process, and comprises the following steps: the device comprises a core holder, a confining pressure pump, a high-pressure injection pump, an intermediate container, a back pressure pump, a measuring container and a controller; wherein:
a core holder having a first space and a second space; the first space is used for placing a saturated rock sample to be predicted; the second space is enclosed outside the first space;
the confining pressure pump is communicated with the second space and is used for compressing water or gas in the second space of the core holder by injecting pressure into the second space and applying confining pressure to the rock sample to be predicted;
the high-pressure injection pump is used for injecting simulated formation water in the middle container into the rock core holder; the input end of the intermediate container is connected with the output end of the high-pressure injection pump, and the output end of the intermediate container is connected with the first end of the rock core holder;
the back pressure pump is connected with the second end of the core holder and is used for injecting pressure to the core holder;
the controller is connected with the confining pressure pump, the high-pressure injection pump and the back pressure pump and is used for controlling the confining pressure pump to inject pressure into the second space; after the confining pressure reaches a preset confining pressure value, controlling a high-pressure injection pump to inject simulated formation water in the middle container into the core holder for multiple times at gradually-increased injection pressure, and controlling a back-pressure pump to input the simulated formation water into the core holder for multiple times at gradually-increased back pressure; when the pressures of the first end and the second end of the rock core holder are monitored to reach a set formation pressure value and are not changed any more, controlling to close the high-pressure injection pump and controlling the back-pressure pump to reduce the pressure by each preset pressure drop value; acquiring water yield data measured by the measuring container under each preset pressure drop value; and predicting the mobility of the water body of the water layer of the gas reservoir according to the water yield data measured by the measuring container under each preset pressure drop value.
The embodiment of the invention also provides a method for predicting the water mobility of the water layer of the gas reservoir, which is used for quantitatively predicting the water mobility of the water layer in the gas reservoir development process and comprises the following steps:
controlling the confining pressure pump to inject pressure into the second space, compressing water or gas in the second space of the rock core holder, and confining pressure is applied to the rock sample to be predicted;
after the confining pressure reaches a preset confining pressure value, controlling a high-pressure injection pump to inject simulated formation water in the middle container into the core holder for multiple times at gradually-increased injection pressure, and controlling a back-pressure pump to input the simulated formation water into the core holder for multiple times at gradually-increased back pressure;
when the pressures of the first end and the second end of the rock core holder are monitored to reach a set formation pressure value and are not changed any more, controlling to close the high-pressure injection pump and controlling the back-pressure pump to reduce the pressure by each preset pressure drop value;
acquiring water yield data measured by the measuring container under each preset pressure drop value;
and predicting the mobility of the water body of the water layer of the gas reservoir according to the water yield data measured by the measuring container under each preset pressure drop value.
The embodiment of the invention also provides a controller of the prediction device of the water mobility of the water layer of the gas reservoir, which is used for quantitatively predicting the water mobility of the water layer in the gas reservoir development process, and the controller comprises:
the confining pressure control unit is used for controlling the confining pressure pump to inject pressure into the second space, compressing water or gas in the second space of the rock core holder and applying confining pressure to the rock sample to be predicted;
the boosting control unit is used for controlling the high-pressure injection pump to inject simulated formation water in the middle container into the core holder for multiple times at gradually-increased injection pressure after the confining pressure reaches a preset confining pressure value, and controlling the back-pressure pump to input the simulated formation water into the core holder for multiple times at gradually-increased back pressure;
the pressure reduction control unit is used for controlling to close the high-pressure injection pump and controlling the back-pressure pump to reduce the pressure by each preset pressure reduction value when the pressure of the first end and the pressure of the second end of the rock core holder reach the set value of the formation pressure and are not changed any more;
the acquisition unit is used for acquiring water yield data measured by the measuring container under each preset pressure drop value;
and the prediction unit is used for predicting the mobility of the water body of the water layer of the gas reservoir according to the water yield data measured by the measuring container under each preset pressure drop value.
The embodiment of the invention also provides computer equipment which comprises a memory, a processor and a computer program which is stored on the memory and can run on the processor, wherein the processor realizes the prediction method of the mobility of the water layer of the gas reservoir when executing the computer program.
An embodiment of the present invention further provides a computer-readable storage medium, which stores a computer program for executing the method for predicting water mobility of a water layer in a gas reservoir.
According to the embodiment of the invention, the confining pressure pump is controlled to inject pressure into the second space, so that water or gas in the second space of the rock core holder is compressed, and confining pressure is applied to the rock sample to be predicted; after the confining pressure reaches a preset confining pressure value, controlling a high-pressure injection pump to inject simulated formation water in the middle container into the core holder for multiple times at gradually-increased injection pressure, and controlling a back-pressure pump to input the simulated formation water into the core holder for multiple times at gradually-increased back pressure; when the pressures of the first end and the second end of the rock core holder are monitored to reach a set formation pressure value and are not changed any more, controlling to close the high-pressure injection pump and controlling the back-pressure pump to reduce the pressure by each preset pressure drop value; acquiring water yield data measured by the measuring container under each preset pressure drop value; and predicting the mobility of the water layer water body of the gas reservoir according to the water yield data measured by the measuring container under each preset pressure drop value, so that the water layer water body mobility in the gas reservoir development process is quantitatively predicted, and the method has important guiding significance for the gas reservoir development.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a prediction apparatus for water mobility of a gas reservoir water layer in an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of a core holder in an embodiment of the invention;
FIG. 3 is a schematic diagram of a movable water saturation curve for a unit pressure drop in an embodiment of the present invention;
FIG. 4 is a schematic flow chart illustrating a method for predicting mobility of water in a water layer of a gas reservoir according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a controller of a prediction device for water mobility of a gas reservoir water layer in an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the invention adopts a physical simulation experiment method to research the mobility of the water body in the rock space under the condition of formation pressure, can measure the mobility of the water body under the condition of unit pressure difference, and has important significance for evaluating (predicting) the mobility of the water body and the influence of the mobility of the water body on gas reservoir development. The following describes the prediction scheme of water mobility of the gas reservoir water layer in detail.
Fig. 1 is a schematic structural diagram of a prediction apparatus for water mobility of a gas reservoir water layer in an embodiment of the present invention, as shown in fig. 1, the apparatus includes: the device comprises a core holder CH, a confining pressure pump 3, a high-pressure injection pump 1, an intermediate container 4, a back pressure pump 2, a measuring container and a controller 7; wherein:
a core holder CH having a first space CH1 and a second space CH 2; the first space CH1 is used for placing a saturated rock sample to be predicted; the second space CH2 is enclosed outside the first space CH 1;
the confining pressure pump 3 is communicated with the second space CH2 and is used for compressing water or gas in the second space CH2 of the core holder CH by injecting pressure into the second space CH2 and pressurizing a rock sample to be predicted in the first space CH 1;
the high-pressure injection pump 1 is used for injecting simulated formation water in the middle container 4 into the core holder CH; the input end of the intermediate container 4 is connected with the output end of the high-pressure injection pump 1, and the output end of the intermediate container 4 is connected with the first end of the core holder CH;
the back pressure pump 2 is connected with the second end of the core holder CH and is used for injecting pressure to the core holder CH;
the controller 7 is connected with the confining pressure pump 3, the high-pressure injection pump 1 and the back pressure pump 2 and is used for controlling the confining pressure pump 3 to inject pressure into the second space CH 2; after the confining pressure reaches a preset confining pressure value, controlling the high-pressure injection pump 1 to inject simulated formation water in the middle container 4 into the core holder CH for multiple times at gradually-increased injection pressure, and controlling the back-pressure pump 2 to input the simulated formation water into the core holder CH for multiple times at gradually-increased back pressure; when the pressures of the first end and the second end of the core holder CH reach the set formation pressure value and are not changed any more, controlling to close the high-pressure injection pump 1 and controlling the back-pressure pump 2 to reduce the pressure by each preset pressure drop value; acquiring water yield data measured by the measuring container under each preset pressure drop value; and predicting the mobility of the water body of the water layer of the gas reservoir according to the water yield data measured by the measuring container under each preset pressure drop value.
The prediction device of the water mobility of the gas reservoir water layer provided by the embodiment of the invention is characterized in that when the device works: and drying the rock sample, and evacuating saturated simulated formation water. And (3) loading the saturated rock sample into a rock Core Holder (CH), and controlling a confining pressure pump to pressurize the rock core in the rock Core Holder (CH) through a controller. After the confining pressure reaches a set value, the controller controls the high-pressure injection pump and the back-pressure pump to simultaneously increase the back pressure and the injection pressure step by step, and after the formation pressure reaches the set value, the formation pressure is balanced for a period of time until the pressure at two ends of the rock core is not changed any more. And (3) closing the high-pressure injection pump, adjusting the outlet back-pressure pump, reducing the pressure for nMPa/time, continuously reducing the pressure 10 minutes after stopping water outlet at each pressure drop until the outlet back-pressure drop is 0, and recording data such as the initial water production time, the pressure, the water yield and the like in the experimental process. And (5) gradually unloading confining pressure 10 minutes after the outlet end of the core does not discharge water any more, and ending the experiment.
Through the steps, the water body momentum under unit pressure drop can be obtained. According to a certain experimental purpose, experiments of different pressure drop amplitudes and different reservoir physical properties can be carried out, so that the water mobility is deeply and systematically researched, the water mobility rule and the physical property boundary are obtained, and a basis is provided for the research of the gas reservoir water mobility.
In an embodiment, as shown in fig. 1, the prediction apparatus for water mobility of a water layer of a gas reservoir may further include:
a first valve V1 arranged on a pipeline for communicating the middle container 4 with the core holder CH;
the first pressure sensor PS1 is arranged between the first valve V1 and the first end of the core holder CH and is used for monitoring the pressure of the first end of the core holder CH;
the second valve V2 is arranged on a pipeline for communicating the back pressure pump 2 with the core holder CH;
the second pressure sensor PS2 is arranged between the second valve V2 and the second end of the core holder CH and is used for monitoring the pressure of the second end of the core holder CH;
the controller 7 is connected with the first valve V1, the first pressure sensor PS1, the second valve V2 and the second pressure sensor PS2, and is specifically configured to control the high-pressure injection pump to be turned off and the back-pressure pump to be depressurized by every preset pressure drop value when the pressure of the first end of the core holder monitored by the first pressure sensor and the pressure of the second end of the core holder monitored by the second pressure sensor reach a set formation pressure value and do not change any more.
In particular implementations, the cross-section of the core holder CH may be circular as shown in fig. 2.
In one embodiment, the controller is specifically configured to control the high-pressure injection pump to increase the injection pressure step by step multiple times after the confining pressure reaches the preset confining pressure value, and each operation of controlling the back-pressure pump to increase the back-pressure step by step multiple times includes: and after the back pressure pump is controlled to increase the back pressure, the high-pressure injection pump is controlled to increase the injection pressure.
During specific implementation, in each boosting control operation process, the back pressure is firstly increased, then the injection pressure of the high-pressure injection pump is increased, the back pressure is higher than the injection pressure, so that liquid in the rock core holder can be sealed, otherwise, the liquid can flow out through the back pressure valve, and the prediction precision and safety are improved.
In an embodiment, as shown in fig. 1, the prediction apparatus for water mobility of a water layer of a gas reservoir may further include:
a third valve V3 provided on a pipeline through which the confining pressure pump 3 communicates with the second space CH 2;
the third pressure sensor PS3 is arranged between the third valve V3 and the core holder CH and is used for monitoring the confining pressure of the confining pressure pump 3 on the rock sample to be predicted;
the controller is connected with the third valve V3 and the third pressure sensor PS3, and is specifically used for controlling the high-pressure injection pump 1 to inject simulated formation water in the middle container 4 into the core holder CH for multiple times at gradually-increased injection pressure and controlling the back-pressure pump 2 to input back-pressure to the core holder CH for multiple times at gradually-increased back-pressure after the ambient pressure monitored by the third pressure sensor PS3 reaches a preset ambient pressure value.
In a specific implementation, as shown in fig. 1, the prediction apparatus for water mobility of a water layer of a gas reservoir may further include: and a first end of the back pressure valve 6 is communicated with the back pressure pump 2, a second end of the back pressure valve is communicated with the core holder CH, and a third end of the back pressure valve is communicated with the measuring container. The back pressure valve 6 is connected with a controller 7 and works under the control of the controller 7.
In particular, as shown in fig. 1, the measuring vessel may be a measuring cylinder 5.
In particular, the lines connecting the various components in fig. 1 may be high pressure resistant hollow lines.
In particular, the first end of the core holder CH is end a in fig. 1 and the second end is end B in fig. 1. The Core Holder (CH) can resist high pressure, and the highest pressure is 70 MPa.
In specific implementation, the high-pressure injection pump controls the injection pressure, and the maximum pressure is 70 MPa.
In particular, the intermediate container is filled with simulated formation water.
In specific implementation, as shown in fig. 3, the controller in the embodiment of the present invention further generates a unit pressure drop movable water saturation curve according to the water yield data under each pressure drop value, so as to more intuitively display the unit pressure drop movable water saturation curve to a user and improve user experience.
Based on the same inventive concept, the embodiment of the present invention further provides a method for predicting water mobility of a water layer of a gas reservoir, as described in the following embodiments. Because the principle of the prediction method for the water mobility of the gas reservoir water layer is similar to that of the prediction device for the water mobility of the gas reservoir water layer, the implementation of the prediction method for the water mobility of the gas reservoir water layer can refer to the implementation of the prediction device for the water mobility of the gas reservoir water layer, and repeated parts are not described again. As used hereinafter, the term "unit" or "module" may be a combination of software and/or hardware that implements a predetermined function. Although the means described in the embodiments below are preferably implemented in software, an implementation in hardware, or a combination of software and hardware is also possible and contemplated.
Fig. 4 is a schematic flow chart of a method for predicting water mobility of a gas reservoir water layer in an embodiment of the present invention, as shown in fig. 4, the method includes the following steps:
step 101: controlling the confining pressure pump to inject pressure into the second space, compressing water or gas in the second space of the rock core holder, and confining pressure is applied to the rock sample to be predicted;
step 102: after the confining pressure reaches a preset confining pressure value, controlling a high-pressure injection pump to inject simulated formation water in the middle container into the core holder for multiple times at gradually-increased injection pressure, and controlling a back-pressure pump to input the simulated formation water into the core holder for multiple times at gradually-increased back pressure;
step 103: when the pressures of the first end and the second end of the rock core holder are monitored to reach a set formation pressure value and are not changed any more, controlling to close the high-pressure injection pump and controlling the back-pressure pump to reduce the pressure by each preset pressure drop value;
step 104: acquiring water yield data measured by the measuring container under each preset pressure drop value;
step 105: and predicting the mobility of the water body of the water layer of the gas reservoir according to the water yield data measured by the measuring container under each preset pressure drop value.
According to the embodiment of the invention, the confining pressure pump is controlled to inject pressure into the second space, so that water or gas in the second space of the rock core holder is compressed, and confining pressure is applied to the rock sample to be predicted; after the confining pressure reaches a preset confining pressure value, controlling a high-pressure injection pump to inject simulated formation water in the middle container into the core holder for multiple times at gradually-increased injection pressure, and controlling a back-pressure pump to input the simulated formation water into the core holder for multiple times at gradually-increased back pressure; when the pressures of the first end and the second end of the rock core holder are monitored to reach a set formation pressure value and are not changed any more, controlling to close the high-pressure injection pump and controlling the back-pressure pump to reduce the pressure by each preset pressure drop value; acquiring water yield data measured by the measuring container under each preset pressure drop value; and predicting the mobility of the water layer water body of the gas reservoir according to the water yield data measured by the measuring container under each preset pressure drop value, so that the water layer water body mobility in the gas reservoir development process is quantitatively predicted, and the method has important guiding significance for the gas reservoir development.
The following describes in detail the individual steps involved in the examples of the present invention.
Firstly, a rock sample to be predicted is introduced.
First, a rock sample to be tested is selected. In specific implementation, the rock sample to be predicted is a regular plunger-shaped crack-free rock core, and the specification of the rock core can be as follows: the diameter is 2.5cm, the length is 3.8cm, and the length is 5-10 cm; or the diameter is 10cm and the length is 10-30 cm.
And secondly, drying the rock sample, evacuating and saturating the simulated formation water.
When the concrete implementation is carried out, firstly, the rock sample is dried: the rock sample may be placed in an oven at 100 ℃ and dried continuously for 48 hours.
When the method is specifically implemented, the rock sample is pumped out and saturated: the dried rock sample (rock core) can be put into an evacuating device, and is connected with a container for containing simulated formation water through a pipeline, the evacuation is carried out, after the vacuum degree reaches a certain value, the simulated formation water is poured into the container for containing the rock sample, the rock sample is saturated, the rock sample is completely immersed in the simulated formation water, and then the evacuation is continued for 30 minutes to 1 hour.
In specific implementation, the simulated formation water is water prepared according to the salinity, the ion quantity and the ion type of the formation water in the research area.
And thirdly, loading the saturated rock sample into a core holder, and applying confining pressure (namely the specific embodiment of the step 101).
In specific implementation, the saturated rock sample is the rock sample obtained after drying and evacuating saturation in the second step.
When the core holder is specifically implemented, the core holder has the characteristics of high pressure resistance and high temperature resistance, the highest pressure is 70MPa, and the highest temperature is 150 ℃.
During specific implementation, the confining pressure can be added through the controller 7 or the computer to automatically control the confining pressure pump to inject pressure into the second space of the core holder, water or gas in the annular space (the second space CH2) of the core holder is compressed to realize pressurization and is used for wrapping a core (a rock sample to be predicted) in the core holder, the water or gas used for the confining pressure can only be in contact with the rubber sleeve and cannot be in direct contact with the surface of the core, and prediction precision is improved.
During specific implementation, the confining pressure is close to the overburden pressure borne by the rock core in the stratum state, the value of the confining pressure can be calculated through the stratum depth of the rock sample, the confining pressure can be automatically controlled, and the value of the confining pressure can not change along with the change of the pore pressure of the rock core.
And fourthly, simultaneously increasing the back pressure and the injection pressure step by step to reach a set value of the formation pressure, and balancing for a period of time until the pressure at the two ends of the core is not changed (namely the specific implementation scheme of the step 102).
In one embodiment, after the confining pressure reaches the preset confining pressure value, controlling the high-pressure injection pump to inject the simulated formation water in the intermediate container into the core holder for a plurality of times at the gradually increased injection pressure, and controlling the back-pressure pump to input the simulated formation water into the core holder for a plurality of times at the gradually increased back-pressure may include:
after the confining pressure reaches the preset confining pressure value, controlling the high-pressure injection pump for multiple times to gradually increase the injection pressure, and controlling the return pressure pump for multiple times to gradually increase the return pressure each time, wherein the operation comprises the following steps: and after the back pressure pump is controlled to increase the back pressure, the high-pressure injection pump is controlled to increase the injection pressure.
In specific implementation, the step-by-step increase of the back pressure and the injection pressure refers to the task of increasing the pressure for multiple times, wherein the back pressure is increased first and then the injection pressure is increased each time.
In specific implementation, the formation pressure set value refers to a formation pressure value of a research block.
In specific implementation, the condition that the pressure at the two ends of the rock core is not changed is that the pressure displayed by the pressure sensors at the two ends of the rock core is within 1 hour, and the change amplitude is not more than 3%.
And fifthly, closing the high-pressure injection pump, adjusting the outlet back pressure, wherein the pressure drop amplitude is nMPa/time, continuously reducing the pressure 10 minutes after stopping water outlet in each pressure drop until the outlet back pressure drop is 0, and recording the initial water production time, the pressure, the water yield and other data in the experimental process (namely the specific implementation scheme of the steps 103 to 105).
In specific implementation, the closing of the high-pressure injection pump refers to the closing of the pump connected with the injection pressure.
In specific implementation, the regulation of the outlet back pressure and the pressure reduction amplitude of nMPa/time refers to the regulation of the back pressure pump, so that the back pressure is reduced by nMPa each time. If the falling speed of the formation pressure is high, a large back pressure falling amplitude is selected for simulation, and if the falling speed of the formation pressure is low, a small back pressure falling amplitude is selected for simulation, so that the water body flow law under the conditions of different mining speeds can be compared.
In specific implementation, the step of continuously reducing the pressure after stopping water outlet for 10 minutes each time of pressure drop refers to starting to reduce the pressure for the next time after stopping water outlet for 10 minutes in the last pressure drop.
In specific implementation, the initial water producing time refers to the time of water breakthrough at the outlet end of the rock core in the experimental process.
In specific implementation, the data of time, pressure, water yield and the like in the experimental process refers to data of pressure, water yield and the like recorded at each time point after each pressure drop.
And sixthly, unloading the confining pressure step by step 10 minutes after the water is not discharged from the core outlet end, and ending the experiment.
In specific implementation, the condition that the outlet end of the rock core does not flow water any more is 10 minutes after the outlet end of the rock core stops flowing water is the end condition of the experiment.
In specific implementation, the step-by-step unloading of confining pressure means that the confining pressure is gradually reduced until the confining pressure is 0.
Based on the same inventive concept, the embodiment of the present invention further provides a controller of a prediction apparatus for water mobility of a water layer of a gas reservoir, as described in the following embodiments. Because the principle of solving the problems of the controller of the prediction device of the water mobility of the gas reservoir water layer is similar to the prediction method of the water mobility of the gas reservoir water layer, the implementation of the controller of the prediction device of the water mobility of the gas reservoir water layer can refer to the implementation of the prediction method of the water mobility of the gas reservoir water layer, and repeated details are not repeated. As used hereinafter, the term "unit" or "module" may be a combination of software and/or hardware that implements a predetermined function. Although the means described in the embodiments below are preferably implemented in software, an implementation in hardware, or a combination of software and hardware is also possible and contemplated.
Fig. 5 is a schematic structural diagram of a controller of a prediction apparatus for water mobility of a gas reservoir water layer according to an embodiment of the present invention, as shown in fig. 5, the controller includes:
the confining pressure control unit 01 is used for controlling the confining pressure pump to inject pressure into the second space, compressing water or gas in the second space of the rock core holder and applying confining pressure to the rock sample to be predicted;
the boosting control unit 02 is used for controlling the high-pressure injection pump to inject simulated formation water in the middle container into the core holder for multiple times at gradually-increased injection pressure after the confining pressure reaches a preset confining pressure value, and controlling the back-pressure pump to input the simulated formation water into the core holder for multiple times at gradually-increased back pressure;
the pressure reduction control unit 03 is used for controlling the high-pressure injection pump to be closed and controlling the back-pressure pump to reduce the pressure by each preset pressure reduction value when the pressures of the first end and the second end of the rock core holder reach the set formation pressure value and are not changed any more;
the acquisition unit 04 is used for acquiring water yield data measured by the measuring container under each preset pressure drop value;
and the prediction unit 05 is used for predicting the mobility of the water body of the water layer of the gas reservoir according to the water yield data measured by the measuring container under each preset pressure drop value.
In one embodiment, the boost control unit is specifically configured to control the high-pressure injection pump to increase the injection pressure step by step multiple times after the confining pressure reaches the preset confining pressure value, and each operation of controlling the back-pressure pump to increase the back-pressure step by step multiple times includes: and after the back pressure pump is controlled to increase the back pressure, the high-pressure injection pump is controlled to increase the injection pressure.
The embodiment of the invention also provides computer equipment which comprises a memory, a processor and a computer program which is stored on the memory and can run on the processor, wherein the processor realizes the prediction method of the mobility of the water layer of the gas reservoir when executing the computer program.
An embodiment of the present invention further provides a computer-readable storage medium, which stores a computer program for executing the method for predicting water mobility of a water layer in a gas reservoir.
The technical scheme provided by the embodiment of the invention has the following beneficial technical effects: the invention measures the water body momentum under unit pressure difference by simulating the moving process of the movable water in the gas reservoir development process, evaluates (predicts) the water body mobility, and provides certain guidance for the gas reservoir development.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes may be made to the embodiment of the present invention by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A prediction device of mobility of a water layer of a gas reservoir is characterized by comprising: the device comprises a core holder, a confining pressure pump, a high-pressure injection pump, an intermediate container, a back pressure pump, a measuring container and a controller; wherein:
a core holder having a first space and a second space; the first space is used for placing a saturated rock sample to be predicted; the second space is enclosed outside the first space;
the confining pressure pump is communicated with the second space and is used for compressing water or gas in the second space of the core holder by injecting pressure into the second space and applying confining pressure to the rock sample to be predicted;
the high-pressure injection pump is used for injecting simulated formation water in the middle container into the rock core holder; the input end of the intermediate container is connected with the output end of the high-pressure injection pump, and the output end of the intermediate container is connected with the first end of the rock core holder;
the back pressure pump is connected with the second end of the core holder and is used for injecting pressure to the core holder;
the controller is connected with the confining pressure pump, the high-pressure injection pump and the back pressure pump and is used for controlling the confining pressure pump to inject pressure into the second space; after the confining pressure reaches a preset confining pressure value, controlling a high-pressure injection pump to inject simulated formation water in the middle container into the core holder for multiple times at gradually-increased injection pressure, and controlling a back-pressure pump to input the simulated formation water into the core holder for multiple times at gradually-increased back pressure; when the pressures of the first end and the second end of the rock core holder are monitored to reach a set formation pressure value and are not changed any more, controlling to close the high-pressure injection pump and controlling the back-pressure pump to reduce the pressure by each preset pressure drop value; acquiring water yield data measured by the measuring container under each preset pressure drop value; and predicting the mobility of the water body of the water layer of the gas reservoir according to the water yield data measured by the measuring container under each preset pressure drop value.
2. The prediction apparatus of water mobility in gas reservoir water layer according to claim 1, further comprising:
the first valve is arranged on a pipeline for communicating the middle container with the rock core holder;
the first pressure sensor is arranged between the first valve and the first end of the core holder and used for monitoring the pressure of the first end of the core holder;
the second valve is arranged on a pipeline for communicating the back pressure pump with the core holder;
the second pressure sensor is arranged between the second valve and the second end of the core holder and used for monitoring the pressure of the second end of the core holder;
the controller is connected with the first valve, the first pressure sensor, the second valve and the second pressure sensor, and is specifically used for controlling the high-pressure injection pump to be closed and the back-pressure pump to be depressurized by each preset pressure drop value when the pressure of the first end of the core holder monitored by the first pressure sensor and the pressure of the second end of the core holder monitored by the second pressure sensor reach a set formation pressure value and are not changed any more.
3. The apparatus according to claim 1, wherein the controller is specifically configured to control the high pressure injection pump to step up the injection pressure a plurality of times after the confining pressure reaches the preset confining pressure value, and each operation of controlling the back pressure pump to step up the back pressure a plurality of times comprises: and after the back pressure pump is controlled to increase the back pressure, the high-pressure injection pump is controlled to increase the injection pressure.
4. The prediction apparatus of water mobility in gas reservoir water layer according to claim 1, further comprising:
the third valve is arranged on a pipeline communicated with the second space through the confining pressure pump;
the third pressure sensor is arranged between the third valve and the rock core holder and used for monitoring the confining pressure applied to the rock sample to be predicted by the confining pressure pump;
the controller is connected with the third valve and the third pressure sensor and is specifically used for controlling the high-pressure injection pump to inject simulated formation water in the intermediate container into the core holder for multiple times at gradually-increased injection pressure after the confining pressure monitored by the third pressure sensor reaches a preset confining pressure value, and controlling the return pressure pump to input the simulated formation water to the core holder for multiple times at gradually-increased return pressure.
5. A prediction method of water mobility of a water layer of a gas reservoir is characterized in that,
controlling the confining pressure pump to inject pressure into the second space, compressing water or gas in the second space of the rock core holder, and confining pressure is applied to the rock sample to be predicted;
after the confining pressure reaches a preset confining pressure value, controlling a high-pressure injection pump to inject simulated formation water in the middle container into the core holder for multiple times at gradually-increased injection pressure, and controlling a back-pressure pump to input the simulated formation water into the core holder for multiple times at gradually-increased back pressure;
when the pressures of the first end and the second end of the rock core holder are monitored to reach a set formation pressure value and are not changed any more, controlling to close the high-pressure injection pump and controlling the back-pressure pump to reduce the pressure by each preset pressure drop value;
acquiring water yield data measured by the measuring container under each preset pressure drop value;
and predicting the mobility of the water body of the water layer of the gas reservoir according to the water yield data measured by the measuring container under each preset pressure drop value.
6. The method for predicting water mobility of a water layer of a gas reservoir according to claim 5, wherein after the confining pressure reaches the preset confining pressure value, the high-pressure injection pump is controlled to inject simulated formation water in the intermediate container into the core holder for a plurality of times at gradually increased injection pressure, and the back-pressure pump is controlled to input back pressure to the core holder for a plurality of times at gradually increased back pressure, and the method comprises the following steps:
after the confining pressure reaches the preset confining pressure value, controlling the high-pressure injection pump for multiple times to gradually increase the injection pressure, and controlling the return pressure pump for multiple times to gradually increase the return pressure each time, wherein the operation comprises the following steps: and after the back pressure pump is controlled to increase the back pressure, the high-pressure injection pump is controlled to increase the injection pressure.
7. A controller for a prediction apparatus of water mobility of a water layer of a gas reservoir, comprising:
the confining pressure control unit is used for controlling the confining pressure pump to inject pressure into the second space, compressing water or gas in the second space of the rock core holder and applying confining pressure to the rock sample to be predicted;
the boosting control unit is used for controlling the high-pressure injection pump to inject simulated formation water in the middle container into the core holder for multiple times at gradually-increased injection pressure after the confining pressure reaches a preset confining pressure value, and controlling the back-pressure pump to input the simulated formation water into the core holder for multiple times at gradually-increased back pressure;
the pressure reduction control unit is used for controlling to close the high-pressure injection pump and controlling the back-pressure pump to reduce the pressure by each preset pressure reduction value when the pressure of the first end and the pressure of the second end of the rock core holder reach the set value of the formation pressure and are not changed any more;
the acquisition unit is used for acquiring water yield data measured by the measuring container under each preset pressure drop value;
and the prediction unit is used for predicting the mobility of the water body of the water layer of the gas reservoir according to the water yield data measured by the measuring container under each preset pressure drop value.
8. The controller of claim 7, wherein the boost control unit is specifically configured to control the high-pressure injection pump to step up the injection pressure multiple times after the confining pressure reaches the preset confining pressure value, and each operation of controlling the back-pressure pump to step up the back-pressure multiple times comprises: and after the back pressure pump is controlled to increase the back pressure, the high-pressure injection pump is controlled to increase the injection pressure.
9. A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the method of any of claims 5 to 6 when executing the computer program.
10. A computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer program for executing the method of any of claims 5 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910509174.3A CN112082945A (en) | 2019-06-13 | 2019-06-13 | Prediction device and method for mobility of water layer water body of gas reservoir and controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910509174.3A CN112082945A (en) | 2019-06-13 | 2019-06-13 | Prediction device and method for mobility of water layer water body of gas reservoir and controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112082945A true CN112082945A (en) | 2020-12-15 |
Family
ID=73733424
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910509174.3A Pending CN112082945A (en) | 2019-06-13 | 2019-06-13 | Prediction device and method for mobility of water layer water body of gas reservoir and controller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112082945A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113550746A (en) * | 2021-07-23 | 2021-10-26 | 中国石油大学(北京) | Edge-bottom water invasion simulation device and method, storage medium and product |
| WO2024099472A1 (en) * | 2022-11-08 | 2024-05-16 | 中国石油天然气股份有限公司 | Method and apparatus for measuring oil and gas breakthrough pressure in compacted rock sample |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102830214A (en) * | 2012-08-15 | 2012-12-19 | 中国石油天然气股份有限公司 | Dynamic physical simulation experiment method for water invasion of fractured gas reservoir with bottom water and device thereof |
| CN202814960U (en) * | 2012-08-15 | 2013-03-20 | 中国石油天然气股份有限公司 | Physical simulation experimental device for water invasion performance of fissured gas reservoir with bottom water |
| CN103278418A (en) * | 2013-05-15 | 2013-09-04 | 西南石油大学 | Determination device and method of constraint irreducible water saturation in reservoir rock core |
| CN104316554A (en) * | 2014-10-27 | 2015-01-28 | 中国石油天然气股份有限公司 | Method for testing mobility of pore water of reservoir stratum |
| CN104374683A (en) * | 2014-11-19 | 2015-02-25 | 中国石油天然气股份有限公司 | Device and method for testing core pore compressibility |
| CN104563982A (en) * | 2015-01-06 | 2015-04-29 | 西南石油大学 | High-temperature high-pressure dry gas injection longitudinal wave and efficiency testing device and method for gas condensate reservoir |
| CN105239973A (en) * | 2015-10-28 | 2016-01-13 | 中国石油化工股份有限公司 | Condensate gas reservoir blockage relieving physical simulation experimental device and condensate gas reservoir blockage relieving physical simulation experimental method |
| CN105372405A (en) * | 2014-08-22 | 2016-03-02 | 中国石油天然气股份有限公司 | Detection system of reservoir gas supply capacity and usage method |
| CN106290045A (en) * | 2016-08-29 | 2017-01-04 | 中国石油天然气股份有限公司 | Unconventional Sandstone Gas Reservoir oiliness and mobility evaluation experimental method |
| CN106596371A (en) * | 2016-12-12 | 2017-04-26 | 西南石油大学 | Retrograde condensation damage experimental evaluation method for depletion type development near-wellbore zone of saturated condensate gas reservoir |
| CN108918392A (en) * | 2018-08-20 | 2018-11-30 | 中国石油天然气股份有限公司 | A kind of Water-bearing Gas Reservoir reservoir produces water rule simulation test device and method |
-
2019
- 2019-06-13 CN CN201910509174.3A patent/CN112082945A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102830214A (en) * | 2012-08-15 | 2012-12-19 | 中国石油天然气股份有限公司 | Dynamic physical simulation experiment method for water invasion of fractured gas reservoir with bottom water and device thereof |
| CN202814960U (en) * | 2012-08-15 | 2013-03-20 | 中国石油天然气股份有限公司 | Physical simulation experimental device for water invasion performance of fissured gas reservoir with bottom water |
| CN103278418A (en) * | 2013-05-15 | 2013-09-04 | 西南石油大学 | Determination device and method of constraint irreducible water saturation in reservoir rock core |
| CN105372405A (en) * | 2014-08-22 | 2016-03-02 | 中国石油天然气股份有限公司 | Detection system of reservoir gas supply capacity and usage method |
| CN104316554A (en) * | 2014-10-27 | 2015-01-28 | 中国石油天然气股份有限公司 | Method for testing mobility of pore water of reservoir stratum |
| CN104374683A (en) * | 2014-11-19 | 2015-02-25 | 中国石油天然气股份有限公司 | Device and method for testing core pore compressibility |
| CN104563982A (en) * | 2015-01-06 | 2015-04-29 | 西南石油大学 | High-temperature high-pressure dry gas injection longitudinal wave and efficiency testing device and method for gas condensate reservoir |
| CN105239973A (en) * | 2015-10-28 | 2016-01-13 | 中国石油化工股份有限公司 | Condensate gas reservoir blockage relieving physical simulation experimental device and condensate gas reservoir blockage relieving physical simulation experimental method |
| CN106290045A (en) * | 2016-08-29 | 2017-01-04 | 中国石油天然气股份有限公司 | Unconventional Sandstone Gas Reservoir oiliness and mobility evaluation experimental method |
| CN106596371A (en) * | 2016-12-12 | 2017-04-26 | 西南石油大学 | Retrograde condensation damage experimental evaluation method for depletion type development near-wellbore zone of saturated condensate gas reservoir |
| CN108918392A (en) * | 2018-08-20 | 2018-11-30 | 中国石油天然气股份有限公司 | A kind of Water-bearing Gas Reservoir reservoir produces water rule simulation test device and method |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113550746A (en) * | 2021-07-23 | 2021-10-26 | 中国石油大学(北京) | Edge-bottom water invasion simulation device and method, storage medium and product |
| US20230021874A1 (en) * | 2021-07-23 | 2023-01-26 | China University Of Petroleum-Beijing | Edge and bottom water invasion simulation apparatus and method for gas reservoir, storage medium, and product |
| CN113550746B (en) * | 2021-07-23 | 2023-03-14 | 中国石油大学(北京) | Edge-bottom water invasion simulation device and method, storage medium and product |
| US11873712B2 (en) * | 2021-07-23 | 2024-01-16 | China University of Petroleum—Beijing | Edge and bottom water invasion simulation apparatus and method for gas reservoir, storage medium, and product |
| WO2024099472A1 (en) * | 2022-11-08 | 2024-05-16 | 中国石油天然气股份有限公司 | Method and apparatus for measuring oil and gas breakthrough pressure in compacted rock sample |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104405345B (en) | Permeable boundary layer natural gas hydrate exploitation simulation experiment device | |
| CN112082945A (en) | Prediction device and method for mobility of water layer water body of gas reservoir and controller | |
| CN202560197U (en) | Thick oil steam soak simulation test device | |
| CN104675394B (en) | Heterogeneous bottom-water reservoir three-dimensional physical simulation experimental provision and saturation degree determine method | |
| KR101248531B1 (en) | Apparatus and method for measuring porosity and permeability of dioxide carbon underground storage medium | |
| CN113567315B (en) | Reservoir rock compression coefficient measurement experiment system and experiment method for multi-round injection and production process of gas storage | |
| Morrow et al. | Effective pressure law for permeability of Westerly granite under cyclic loading | |
| SA515360456B1 (en) | Method and system for characterising subsurface reservoirs | |
| CN105239973A (en) | Condensate gas reservoir blockage relieving physical simulation experimental device and condensate gas reservoir blockage relieving physical simulation experimental method | |
| CN104316554A (en) | Method for testing mobility of pore water of reservoir stratum | |
| CN109470570B (en) | Water-oil isolation type soaking triaxial test box and test method | |
| CN109211746B (en) | Device and experimental method for simulating oil and gas migration process under geological condition | |
| WO2009024544A3 (en) | Method for virtual metering of injection wells and allocation and control of multi-zonal injection wells | |
| NO20101314L (en) | Procedure for determining source deposition capacity | |
| MX351081B (en) | Apparatus and method for pulse testing a formation. | |
| CN116050623B (en) | Method for calculating and evaluating gas supply capacity of tight gas reservoir | |
| CN105134149A (en) | Device and method changing injection and production well carbon dioxide driving status | |
| CN109142680A (en) | Coal rock cleat compressed coefficient test device determines method and system | |
| CN104198351A (en) | Three-phase relative permeability curve test method | |
| CN106014365A (en) | Method for predicting water-flooding development oil field output decline rate | |
| CN108119110B (en) | Method for predicting effect of polymer flooding technology | |
| KR101866205B1 (en) | Apparatus and method for supply working fluid of hydraulic supply system | |
| Kitamura et al. | Experimental and numerical study of residual CO2 trapping in porous sandstone | |
| CN105372405A (en) | Detection system of reservoir gas supply capacity and usage method | |
| ATE440786T1 (en) | METHOD AND DEVICE FOR FILLING THE DOSING CHAMBER OF AN INHALER FOR THE FIRST TIME |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |