CN106526126A - Experimental method for simulating comprehensive exploitation of two or more producing formations - Google Patents
Experimental method for simulating comprehensive exploitation of two or more producing formations Download PDFInfo
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- CN106526126A CN106526126A CN201610903650.6A CN201610903650A CN106526126A CN 106526126 A CN106526126 A CN 106526126A CN 201610903650 A CN201610903650 A CN 201610903650A CN 106526126 A CN106526126 A CN 106526126A
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- pressure
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/24—Earth materials
Abstract
The invention discloses an experimental method for simulating the comprehensive exploitation of two or more producing formations. A specific method comprises the following steps of previously making at least two groups of producing formation test samples and simulative fissure test samples, which meet test requirements; mounting each group of producing formation test samples and simulative fissure test samples in parallel in corresponding branches, determining the gas pool pressure of each branch, the confining pressure of each producing formation test sample and the confining pressure of each simulative fissure test sample, and determining all exploitation modes according to the quantity of the producing formations; simulating the energy yield in each exploitation mode within the same time interval in the conditions of equivalent gas pool pressure and confining pressure; comparing the energy yields of all the exploitation modes within the same time interval, and selecting the exploitation mode corresponding to a maximum energy yield as an actual exploration mode. According to the experimental method for simulating the comprehensive exploitation of the two or more producing formations, the exploration mode in which the energy yield is maximum within a unit time is selected as the exploration mode of an actual stratum; the mining efficiency of the stratum is greatly improved; by using a simulative mining method for the stratum, the blank of researching a multi-producing-formation comprehensive exploration production capacity estimating method is filled in; a device is high in reliability; the estimating method is simple and convenient to operate.
Description
Technical field
The present invention relates to petroleum works technical field, more particularly to a kind of experiment of simulation two or more payzone comprehensive exploitation
Method.
Background technology
For the gas well with the different payzone of multiple reservoir properties or with various reservoirs such as coal petrography, shale, sandstone
Individual well, using multilayered reservoir comprehensive exploitation compared with separate zone production, produces tolerance daily, saves recovery time, reduces cost of winning with increasing
The advantages of.
Although multilayered reservoir is also adopted by synthetical development technology in actual exploitation at present, multilayered reservoir exploitation at present is cannot
Precognition, good time difference when exploitation effect is also, stability is poor.
Therefore, multilayered reservoir exploitation gas producing efficiency how is improved, is that the technology urgently to be resolved hurrily of those skilled in that art is asked
Topic.
The content of the invention
For solving above-mentioned technical problem, the present invention provides a kind of experimental technique of simulation two or more payzone comprehensive exploitation,
Concrete grammar is as follows：
At least two groups payzone samples and simulation fracture sample that pre-production Pass Test is required；
Payzone sample described in each group and simulation fracture sample are mounted in parallel in respective branch, and determine the gas reservoir of each branch road
Pressure, the confined pressure of each payzone sample, the confined pressure of the simulation fracture sample and all exploitations are determined according to payzone quantity
Pattern；
Simulate in the case of the equal gas reservoir pressure, the confined pressure, the production capacity in same time period under each development mode
Amount；
Production capacity amount in the comparison same time period under each development mode, chooses the exploitation mould corresponding to maximum production capacity amount
Formula is actual development pattern.
Optionally, when development mode includes N number of development process, the order between each development process can be mutually adjusted；
Throughput sum in each development process is production capacity amount；Wherein N is more than grade unit 2.
Optionally, the outlet end of above-mentioned each branch road is confluxed connection main escape pipe, when in development process work simultaneously
When the quantity on road is more than two, the gas production of the development process is calculated according to the gas flow in the main escape pipe.
Optionally, development mode number determination method is specially：Made in considering payzone quantity and actual exploitation
Winning apparatus type, chooses the development mode matched with the winning apparatus used in actual exploitation.
Optionally, in each development mode simulation process, also payzone sample described in real-time detection each group and simulation fracture examination
Sample inlet pressure and outlet pressure are big with corresponding preset value to the difference of the outlet pressure by the comparison inlet pressure
It is little, judge whether payzone sample described in each group and simulation fracture sample meet requirement of experiment.
Optionally, the end of each branch road is also preset with flow component, and the flow component is arranged at second folder
The gas outlet of holder；The flow component includes the tie point being arranged in parallel and the second branch road, sets in the tie point
The first check valve and first flowmeter is equipped with, the second check valve and second flowmeter on second branch road, is provided with, described
The conducting direction of one check valve and second check valve is contrary；
In each development mode simulation process, effusion meter described in described first also in real-time monitoring work branch and described
The numerical value of second flowmeter, judges the aerogenesis working condition in respective branch.
Optionally, pressure cylinder is also preset with each branch road, the gas reservoir pressure of the branch road is by relevant pressure gas cylinder
There is provided.
Choose the maximum development mode of gas production in the unit interval herein, as the development mode of actual formation, to greatly improve
The production efficiency on stratum.It is provided in this article that multilayered reservoir comprehensive exploitation evaluating production capacity side has been broken to the method that exploitation is simulated on stratum
The blank of method research, device reliability are strong, and evaluation methodology is easy to operate.
Description of the drawings
Fig. 1 shows for the structure of the experimental provision in an embodiment of the present invention for simulating two or more payzone comprehensive exploitation
It is intended to；
Fig. 2 is the flow chart of the experimental technique of simulation two or more payzone comprehensive exploitation in an embodiment of the present invention.
Wherein, in Fig. 1：
Tie point 10, the first gas cylinder 11, inlet pressure gauge 12, the first clamper 13, the second clamper 14, outlet pressure
Table 15, switch valve 16, the first confining pressure device 17, the second confining pressure device 18；
Second branch road 20, the second gas cylinder 21, inlet pressure gauge 22, the first clamper 23, the second clamper 24, outlet pressure
Table 25, switch valve 26, the first confining pressure device 27, the second confining pressure device 28；
3rd branch road 30, the 3rd gas cylinder 31, inlet pressure gauge 32, the first clamper 33, the second clamper 34, outlet pressure
Table 35, switch valve 36, the first confining pressure device 37, the second confining pressure device 38；
Main escape pipe 40, flow components 41；
First check valve 71, the second check valve 72, first flowmeter 81, second flowmeter 82.
Specific embodiment
In order that those skilled in the art more fully understands technical scheme, it is below in conjunction with the accompanying drawings and concrete real
The present invention is described in further detail to apply example.
Fig. 1 is refer to, Fig. 1 is filled for the experiment for being used for simulating in an embodiment of the present invention two or more payzone comprehensive exploitation
The structural representation put.
The invention provides a kind of experimental provision for simulating two or more payzone comprehensive exploitation, the experimental provision includes
Pressure source, pressure source are preferably gas.The gas reservoir pressure of corresponding payzone in pressure source main analog actual formation.
The experimental provision at least includes two branch roads, and each branch road is arranged parallel, and import connects pressure source, leads to
The pressure for entering each branch road import is the gas reservoir pressure of the payzone.Be additionally provided with each branch road the first clamper, the second clamper,
Confining pressure device.
Wherein, the first clamper has the chamber for holding payzone sample, and the shape of chamber can be with payzone sample
Mating shapes, introduce technical scheme, people's lithogenesis herein by taking payzone sample behaviour lithogenesis stem plug and formation core plunger as an example
Stem plug and formation core plunger can be processed making according to test requirements document.Correspondingly, the first clamper can be post
Body structure, its cross section can be cylinder.The inner surface of chamber is matched with the outer surface of payzone sample.
First clamper outer surface has gas feed, gas outlet and confined pressure import, the gas feed of the first clamper
By the outlet of pipeline connection pressure source.
Second clamper herein also has the chamber for holding simulation fracture sample, the appearance mask of the second clamper
The gas for having gas feed, gas outlet and confined pressure import, gas feed connection first clamper of the second clamper goes out
Mouthful.
The structure of the second clamper can be identical with the structure of the first clamper, it is also possible to different.
The experimental provision of this paper also includes confining pressure device, the confined pressure import of its first clamper of outlet and the second clamping
The confined pressure import of device, the chamber for the chamber to the first clamper and the second clamper provide pressure medium.That is confining pressure device
Inject pressure medium to simulate the overlying strata stressor layer in actual formation suffered by payzone to the first clamper chamber.Confining pressure device is to
Two clamper chambers inject pressure medium to simulate the pressure suffered by the crack rock stratum passed through by gas in actual formation.
This experimental provision also includes flow components and the switch valve being arranged on each branch road, and flow components are used for detection by each
The flow of the branch road eluting gas.Switch valve be used for connect/disconnect respective branch.Switch valve on a certain branch road is opened
When, the branch road is in connected state, and the gas in pressure source can sequentially flow through the chamber of the first clamper arranged on the branch road
Room, the chamber of the second clamper, can finally flow out the branch road；During closing switch valve, branch road is off, in pressure source
Gas is disconnected with branch road.
Fig. 2 is refer to, Fig. 2 is the experimental technique of simulation two or more payzone comprehensive exploitation in an embodiment of the present invention
Flow chart.
On the basis of above-mentioned experimental provision, a kind of experiment of simulation two or more payzone comprehensive exploitation is also provided herein
Method, concrete grammar are as follows：
At least two groups payzone samples and simulation fracture sample that S1, pre-production Pass Test are required；
The payzone sample and simulation fracture sample that are installed on same branch road are defined as into one group herein.
S2, payzone sample described in each group and simulation fracture sample are mounted in parallel in respective branch, and determine each branch road
Gas reservoir pressure, the confined pressure of each payzone sample, the confined pressure of the simulation fracture sample and determined according to payzone quantity all
Development mode；
To arrange three branch roads, i.e., as a example by the scene exploited with three payzones by simulation, for description technique scheme
It is succinct, three branch roads are respectively defined as into tie point 10, the second branch road 20 and the 3rd branch road 30, wherein tie point herein
Payzone sample and simulating crack sample on 10 is respectively defined as the first payzone sample and the first simulating crack sample, in the same manner, the
The second payzone sample and the second simulating crack sample is provided with two branch roads 20, is provided with the 3rd payzone sample on the 3rd branch road 30
With the 3rd simulating crack sample.
When it is determined that during development mode, three payzones can be carried out combination in any, the development mode of three payzones is specially：
The first：Respectively the payzone on tie point 10, the second branch road 20 and the 3rd branch road 30 is individually exploited；
Second：The payzone of tie point 10 and the second branch road 20 is exploited together, and the payzone on the 3rd branch road 30 is individually opened
Adopt；
The third：The payzone of tie point 10 and the 3rd branch road 30 is exploited together, and the payzone of the second branch road 20 is individually exploited；
4th kind is：The payzone of the second branch road 20 and the 3rd branch road 30 is exploited together, and the payzone of tie point 10 is individually opened
Adopt；
5th kind is：Tie point 10, the second branch road 20 and 30 three's payzone of the 3rd branch road are exploited together.
S3, simulation in the case of the equal gas reservoir pressure, the confined pressure, the product in same time period under each development mode
Energy；
Or so that above-mentioned tertiary industry layer is exploited as an example, need five kinds of development modes to more than to be simulated production capacity amount, tool
Body ground, when testing to the first development mode, the first development mode is divided into three recovery process：10 payzone of tie point
Aerogenesis simulation, the aerogenesis simulation of 20 payzone of the second branch road and the aerogenesis simulation of 30 payzone of the 3rd branch road, i.e., open three branch roads successively
The switch valve of middle one of which, and remaining both switch valve is closed, obtain tie point 10, the second branch road 20 in the scheduled time
With the 3rd branch road 30.The confined pressure of each payzone sample, results of fracture simulation wherein in tie point 10, the second branch road 20 and the 3rd branch road 30
The confined pressure of sample is set according to test requirements document, corresponding with the confined pressure of actual payzone, formation fractures confined pressure in corresponding stratum.
Second development mode includes two recovery process, and a recovery process is：Tie point 10 and the second branch road 20
Payzone exploit together；Another recovery process is：Payzone on 3rd branch road 30 is individually exploited.The two recovery process orders
Can mutually adjust.The order of i.e. each recovery process is not specifically limited.That is, when development mode includes N number of exploitation
During process, the order between each development process can be mutually adjusted；Throughput sum in each development process is production capacity amount；Its
Middle N is more than grade unit 2.
In the same manner, the third development mode, the 4th kind of development mode also include two recovery process.
5th kind of development mode includes a recovery process：Three payzones are exploited simultaneously.
It should be noted that the production capacity amount of a certain development mode refers to each development process aerogenesis in the identical predetermined amount of time
The summation of amount,Wherein, flows of the Q for the unit time, t is predetermined amount of time.
The selection principle of t is generally source of the gas output pressure and maintains a certain concrete pressure value constant time period, a kind of concrete
Simulation experiment in, typically choose 2 hours or so, that is, calculate the gas production of the development process in 2 hours.In certain hour,
The total flow of the development process, was within the time period, the wink per 5min time intervals with mass flow meters in the time interval
The accumulation of the product of Shi Liuliang and.In 2h, the total flow of each development process in a certain development mode is added, the exploitation is
Total simulation yield under pattern.
In order to improve certainty of measurement, when in development process, the quantity of the branch road of work is more than two simultaneously, according to described
Gas flow in main escape pipe calculates the gas production of the development process.
Production capacity amount in same time period described in S4, comparison under each development mode, chooses opening corresponding to maximum production capacity amount
The pattern of sending out is actual development pattern.
Experimental provision presented herein can realize multilayered reservoir exploitation simulation, be conducive to research worker in formation production
Capacity efficiency under front evaluation study difference exploitation pattern.And the maximum development mode of gas production in the unit interval is chosen herein
As the development mode of actual formation, the production efficiency on stratum is greatly improved.The side for simulating exploitation to stratum provided in this article
Method has broken the blank of multilayered reservoir comprehensive exploitation evaluating production capacity technique study, and device reliability is strong, and evaluation methodology is easy to operate.
As described above, the pressure source in experimental provision can be pressure cylinder, pressure cylinder can be corresponded with branch road,
Respectively the corresponding branch road is supplied；As shown in figure 1, the first gas cylinder 11 in tie point 10, is provided with, the second branch road 20
On be provided with the second gas cylinder 21, be provided with the 3rd gas cylinder 31 on the 3rd branch road 30, wherein the first gas cylinder 11, the second gas cylinder 21,
The outlet pressure of three gas cylinders 31 is set according to the gas reservoir pressure of the first payzone, the second payzone, the 3rd payzone.
In addition, the quantity of pressure source can also be one, voltage regulation part on each branch road, is provided with, pressure source outlet passes through
Corresponding voltage regulation part connects the gas feed of the first clamper.Voltage regulation part can be pressure regulator valve, the gas Jing pressure regulation of pressure source
Part is adjusted to the pressure (gas reservoir pressure) required for branch road.
The each branch road of the experimental provision is also equipped with inlet pressure gauge and delivery gauge, inlet pressure gauge and the outlet pressure
Power table is respectively arranged at the gas outlet of the gas feed of the first clamper and the second clamper.As shown in figure 1, tie point 10
On be provided with inlet pressure gauge 12 and delivery gauge 15,20 inlet pressure gauge 22 of the second branch road and delivery gauge 25, the 3rd
Inlet pressure gauge 32 and delivery gauge 35 is provided with branch road 30.
Carry out in exploitation simulation process in the branch road, experimenter can be according to the inlet pressure gauge arranged on same branch road
With the numerical value of delivery gauge, permeability of the current state gas after payzone sample and simulation fracture sample is judged, and then
May determine that whether stages of labor sample and simulation fracture sample meet requirement.
That is, in each development mode simulation process, also payzone sample described in real-time detection each group and simulation fracture sample enter
Mouthful pressure and outlet pressure, by comparing inlet pressure and the size of the difference for stating outlet pressure and corresponding preset value, judge each
Whether group payzone sample and simulation fracture sample meet requirement of experiment.
Wherein, preset value is determined by pre-simulated payzone.
Confining pressure device in the various embodiments described above can specifically include the first confining pressure device and the second confining pressure device, and first encloses
Pressure device provides pressure medium for the chamber to the first clamper；Second confining pressure device is for carrying to the chamber of the second clamper
For pressure medium.Arrange two independent confining pressure devices to press the first clamper and the second clamper chamber respectively, two
Confining pressure device is not disturbed each other, is conducive to the first confining pressure device and the second confining pressure device quick pressure releasing after the completion of experiment.
First confining pressure device and the preferred compression pump of the second confining pressure device.Referring again to Fig. 1, tie point 10 is provided with
One confining pressure device 17 and the second confining pressure device 18, the first clamper 13 and the second clamper 14 that both are respectively on the branch road are carried
For confined pressure.In the same manner, the confining pressure device for arranging on the second branch road 20 and the 3rd branch road 30 distinguishes the first confining pressure device 27, the second confined pressure
Device 28, the first confining pressure device 37 and the second confining pressure device 38.
In view of two or more payzone is carried out while when exploiting, the air pressure between two branch roads may be unequal, both collections
Gas flows out to have and interferes, and in order to improve the accuracy of experimental simulation, is also add with lower component herein.
In the various embodiments described above, flow component on each branch road, is additionally provided with, flow component is arranged at the gas of the second clamper
Body is exported；Flow component includes the first branch being arranged in parallel and the second branch, is provided with the first check valve 71 in the first branch
With first flowmeter 81, the second check valve 72 and second flowmeter 82, the first check valve 71 and second in the second branch, is provided with
The conducting direction of check valve 72 is contrary.First flowmeter 81 and first flowmeter 82 are respectively used to measure the stream of pipeline residing for which
Amount.
On branch road, in flow component, parallel arrangement of first check valve 71 and the second check valve 72 can form microcirculation stream
Road, is available for gas circulating flow, with influencing each other between eliminating when multiple branch circuit is exploited jointly.With tie point 10 and second
As a example by 20 common exploitation of road, when the pressure of the second clamper gas outlet in tie point 10 is more than the second folder in the second branch road 20
During the pressure of holder gas outlet, in tie point 10, the gas of the second clampers of Jing 14 is complete by flow component the first check valve 71
Flow to full main escape pipe 40, and the gas part of the second clampers of Jing 24 flow to main escape pipe 40 in the second branch road 20, partly by
Second check valve 72 is returned, in the microcirculation passage interior circulation that the first check valve 71 and the second check valve 72 are formed.
In each development mode simulation process, effusion meter 81 and institute described in described first also in real-time monitoring work branch
The numerical value of second flowmeter 82 is stated, the aerogenesis working condition in respective branch is judged.
Above-mentioned, first flowmeter 81 and the second flowmeter 82 can be soap film flowmeter, soap film flowmeter measurement
Precision comparison is high.
In the various embodiments described above, switch valve is arranged between flow component and the second clamper.
Limited by situ extraction equipment, and not all development mode is all adapted to actual winning apparatus, therefore development mode number
Method for determination of amount is specifically as follows：Consider payzone quantity and the winning apparatus type used in actual exploitation, choose
The development mode matched with the winning apparatus used in actual exploitation.
On the basis of above-mentioned experiment stout man, further tie point 10 and 20 payzone of the second branch road are combined out herein
Adopting has carried out physical simulation, and 2 for being simulated payzone formation parameter is as shown in table 1.
1 payzone formation parameter of table
Wherein, the confined pressure in same branch road in the first clamper and the second clamper is equal, the confined pressure being in upper table.
Concretely comprise the following steps：
(1) in arranging tie point 10,11 pressure of the first gas cylinder is 15.66MPa, arranges the first folder in tie point 10
Confined pressure in holder 13 and the second clamper 14 is 18.00MPa.By the simulation of the rock core plunger and diameter 25mm of diameter 25mm
Crack is respectively charged into the first clamper 13 and the second clamper 14.
(2) in arranging the second branch road 20,21 pressure of the second gas cylinder is 14.67MPa, arranges the first folder in the second branch road 20
Confined pressure in holder 23 and the second clamper 24 is 18.50MPa.The simulation of the rock core plunger and diameter 25mm of diameter 25mm is split
Seam is respectively charged into the first clamper 23 and the second clamper 24.
(3) accompanying drawing Fig. 1 modes to specifications, connect pipeline.Closing switch valve 36, opens switch valve 16, switch valve
26.The first clamper and the second clamper arrival end and the pressure value changes of the port of export in two branch roads are recorded respectively, record first
The reading change of effusion meter 81, second flowmeter 82 and flow components 41, calculates total flow Q in certain hour12Change, simulation the
20 payzone unitized production of one branch road 10 and the second branch road.
As a result it is as shown in table 2.
It should be noted that air-flow in Fig. 1 flows from left to right is defined as positive flow herein, rightabout definition
For reverse flow.
2 pairs of payzones of table develop jointly simulation test data
Above a kind of experimental provision for simulating two or more payzone comprehensive exploitation provided by the present invention is carried out
It is discussed in detail.Specific case used herein is set forth to the principle of the present invention and embodiment, above example
Illustrate that being only intended to help understands the method for the present invention and its core concept.It should be pointed out that for the common skill of the art
For art personnel, under the premise without departing from the principles of the invention, some improvement and modification can also be carried out to the present invention, these change
Enter and modify to also fall in the protection domain of the claims in the present invention.
Claims (7)
1. it is a kind of simulation two or more payzone comprehensive exploitation experimental technique, it is characterised in that concrete grammar is as follows：
At least two groups payzone samples and simulation fracture sample that pre-production Pass Test is required；
Payzone sample described in each group and simulation fracture sample are mounted in parallel in respective branch, and determine the gas reservoir pressure of each branch road
Power, the confined pressure of each payzone sample, the confined pressure of the simulation fracture sample and all exploitation moulds are determined according to payzone quantity
Formula；
Simulate in the case of the equal gas reservoir pressure, the confined pressure, the production capacity amount in same time period under each development mode；
Production capacity amount in the comparison same time period under each development mode, choosing the development mode corresponding to maximum production capacity amount is
Actual development pattern.
2. experimental technique as claimed in claim 1, it is characterised in that when development mode includes N number of development process, respectively open
Order between the process of sending out can be mutually adjusted；Throughput sum in each development process is production capacity amount；Wherein N is first more than waiting
2。
3. experimental technique as claimed in claim 1, it is characterised in that conflux the main outlet of connection for the outlet end of above-mentioned each branch road
Pipe, when in development process, the quantity of the branch road of work is more than two simultaneously, according to the gas flowmeter in the main escape pipe
Calculate the gas production of the development process.
4. experimental technique as claimed in claim 1, it is characterised in that development mode number determination method is specially：It is comprehensive
Consider payzone quantity and the winning apparatus type used in actual exploitation, choose and the winning apparatus used in actual exploitation
The development mode for matching.
5. the experimental technique as described in any one of Claims 1-4, it is characterised in that in each development mode simulation process, also
Payzone sample described in real-time detection each group and simulation fracture sample inlets pressure and outlet pressure, by the comparison inlet pressure
To the size of the difference of the outlet pressure and corresponding preset value, judge whether are payzone sample described in each group and simulation fracture sample
Meet requirement of experiment.
6. the experimental technique as described in any one of Claims 1-4, it is characterised in that the end of each branch road is also preset with
Flow component, the flow component are arranged at the gas outlet of second clamper；The flow component includes being arranged in parallel
Tie point and the second branch road, be provided with the first check valve and first flowmeter, second branch road in the tie point
On be provided with the second check valve and second flowmeter, first check valve and second check valve conducting direction it is contrary；
In each development mode simulation process, effusion meter and described second described in described first also in real-time monitoring work branch
The numerical value of effusion meter, judges the aerogenesis working condition in respective branch.
7. experimental technique as claimed in claim 1, it is characterised in that be also preset with pressure cylinder in each branch road, it is described
The gas reservoir pressure of branch road is provided by relevant pressure gas cylinder.
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| CN201464203U (en) * | 2009-07-30 | 2010-05-12 | 中国石油天然气股份有限公司 | Experimental device for physically simulating commingling production of gas reservoir |
| US8683858B2 (en) * | 2010-12-13 | 2014-04-01 | University Of Wyoming | Recirculating, constant backpressure core flooding apparatus and method |
| CN103674593A (en) * | 2013-12-02 | 2014-03-26 | 中国海洋石油总公司 | Device and method for simulating waterflood test in fracturing vertical shaft of low-permeability reservoir |
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