CN105804701A - Automatic control method of intermittent production of coal-bed gas well - Google Patents
Automatic control method of intermittent production of coal-bed gas well Download PDFInfo
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- CN105804701A CN105804701A CN201610154841.7A CN201610154841A CN105804701A CN 105804701 A CN105804701 A CN 105804701A CN 201610154841 A CN201610154841 A CN 201610154841A CN 105804701 A CN105804701 A CN 105804701A
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- well
- bed gas
- opened
- autocontrol method
- coal bed
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- 238000004519 manufacturing process Methods 0.000 title abstract description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 34
- 239000003245 coal Substances 0.000 claims description 34
- 238000004458 analytical method Methods 0.000 claims description 6
- 230000001276 controlling effect Effects 0.000 claims description 6
- 230000001360 synchronised Effects 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 4
- 230000000875 corresponding Effects 0.000 claims description 4
- 238000010205 computational analysis Methods 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 abstract description 9
- 230000002159 abnormal effect Effects 0.000 abstract description 3
- 230000005611 electricity Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 17
- 230000036039 immunity Effects 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006011 modification reaction Methods 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/006—Production of coal-bed methane
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
- G05B19/058—Safety, monitoring
Abstract
The invention provides an automatic control method of intermittent production of a coal-bed gas well, and belongs to field of coal-bed gas development. According to the method, an intermittent production technology of the coal-bed gas well is used as the theoretical basis; an automatic system is used; and the intermittent production time or the flowing bottomhole pressure critical value is set in an automatic monitoring interface, and the automatic starting and stop of an oil sucking machine can be realized. The problem of how to realize the automatic control in the intermittent production process, the problem of flowing pressure rise due to electricity failure in the intermittent production process, and the problem of flowing bottomhole pressure abnormal fluctuation caused by pressure abnormality are solved. The automatic control method has the advantages that the work intensity is reduced; the work efficiency is improved; and the new ideal is provided for the automatic control of the intermittent production of the coal-bed gas well.
Description
Technical field
The invention belongs to cbm development engineering field, relate to the autocontrol method opened between a kind of coal bed gas well.
Background technology
The automatic control technology core opened between coal bed gas well is PLC control technology, and present stage PLC technology is widely used at commercial production automation field, comparative maturity, has simple in construction, programs feature convenient, highly reliable, strong interference immunity.Therefore, this autocontrol method is with PLC control for core, to open technology for theoretical model, forms, by studying, the autocontrol method opened between a set of coal bed gas well.
" taking out automatic control technology between oil pumper " discloses a kind of automatic control technology, it is with single-chip microcomputer for core, stability and logicality are poor, also not pair between open procedure occur that the problems such as power failure propose a solution, the present invention and " taking out automatic control technology between oil pumper " are different in that: the control core opened between 1, mentioning in paper is single-chip microcomputer, and the control core of the present invention is PLC；PLC has stability relative to single-chip microcomputer, programs the features such as convenient, strong interference immunity.2, opinion the article pointed out, what realize taking out between oil pumper automatically controls and need to install automatically controlled gas pulse device at well head.And the present invention is without additionally increasing control device.3, paper also not pair between open procedure occur that the problems such as power failure propose a solution.The present invention and " between oil well open procedure auto-control energy-saving demonstration " are different in that: 1, automatically controlling of opening between how realizing is not described by paper.2, this paper not pair between the thinking that automatically controls opened be specifically described.
Open between these two sections of papers pair and automatic control process runs into all not clear and definite specific practice of problem such as power failure, flowing bottomhole pressure (FBHP) unusual fluctuations, also not pair between the thinking that automatically controls opened do detailed narration, it is impossible to ensure that coal bed gas well is opening the even running in automatic control process.
Based on above technical problem, the invention provides the autocontrol method opened between a kind of coal bed gas well, it is by opening technical know-how research between coal bed gas well, and manufacturing parameter analysis in open procedure between coal bed gas well, the automatic control program principle opened between proposition, establish the autocontrol method opened between a set of coal bed gas well, and for the power cut problem occurred in an open procedure, flowing bottomhole pressure (FBHP) unusual fluctuations problem proposes resolving ideas, it is ensured that coal bed gas well is opening the even running in automatic control process.
Summary of the invention
For achieving the above object, the present invention adopts the following technical scheme that the autocontrol method opened between a kind of coal bed gas well, it is characterized in that, this control method adopts the autocontrol method two ways driven a well between the autocontrol method implementing to drive a well between " Time Method " and enforcement " critical value method " to open between carrying out, wherein, the autocontrol method implementing to drive a well between " Time Method " is to control stream pressure for core, to determine an ETAD expected time of arrival and departure by computational analysis；The autocontrol method implementing to drive a well between " critical value method " is the well for lower going-into-well downforce meter, determines the marginal value of start and stop well pressure according to flowing bottomhole pressure (FBHP) decline or rise amplitude, opens between enforcement.
Further, as preferably, the autocontrol method driven a well between described enforcement " Time Method " is specifically: operator are after host computer inputs start and stop well time command, after PLC collects this instruction, return to host computer and carry out time synchronized, when after time synchronized, PLC carries out operational analysis, perform instruction, and this instruction feedback to oil pumper is carried out automatic start-stop, it is achieved that opens automatically controls.
Further, as preferably, the autocontrol method driven a well between described enforcement " critical value method " has: operator are after host computer inputs start and stop well pressure value, after PLC reads the force value that instruction specifies start and stop well, carry out action planning, this instruction feedback to oil pumper is carried out automatic start-stop, it is achieved that opens automatically controls.
Further, as preferably, it specifically includes following steps:
Step one, the ancient 4-120 well in Changzhi coal bed gas branch company producing well opens test between carrying out automatically；
Step 2, to the automatic control program opened between writing of PLC in this well Automated condtrol cabinet；
Step 3, the upper computer software interface opened between establishment automatically；
Step 4, according to opening automatically controlling of opening between classification carries out between corresponding；
Step 5, scene carries out the test that has a power failure, and checks that whether host computer is according to technical scheme execution alarm prompt and emergency safeguard measure；
Step 6, scene carries out piezometer transmission abnormality test, checks that whether host computer is according to the autocontrol method switching opened between technical scheme execution " Time Method ", and makes alarm prompt.
The beneficial effects of the present invention is:
The autocontrol method opened between a kind of coal bed gas well provided by the invention, it is by opening technical know-how research between coal bed gas well, and manufacturing parameter analysis in open procedure between coal bed gas well, the automatic control program principle opened between proposition, establish the autocontrol method opened between a set of coal bed gas well, and for the power cut problem occurred in an open procedure, flowing bottomhole pressure (FBHP) unusual fluctuations problem proposes resolving ideas, it is ensured that coal bed gas well is opening the even running in automatic control process.
Accompanying drawing explanation
Fig. 1 is the theory structure schematic diagram of the autocontrol method opened between a kind of coal bed gas well of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is carried out detailed description.It should be appreciated, however, that being provided only of accompanying drawing is more fully understood that the present invention, they should not be interpreted as limitation of the present invention.
As shown in Figure 1, the present invention provides the autocontrol method opened between a kind of coal bed gas well, this control method adopts the autocontrol method two ways driven a well between the autocontrol method implementing to drive a well between " Time Method " and enforcement " critical value method " to open between carrying out, wherein, the autocontrol method implementing to drive a well between " Time Method " is to control stream pressure for core, to determine an ETAD expected time of arrival and departure by computational analysis；The autocontrol method implementing to drive a well between " critical value method " is the well for lower going-into-well downforce meter, determines the marginal value of start and stop well pressure according to flowing bottomhole pressure (FBHP) decline or rise amplitude, opens between enforcement.
In the present embodiment, the autocontrol method driven a well between described enforcement " Time Method " is specifically: operator are after host computer inputs start and stop well time command, after PLC collects this instruction, return to host computer and carry out time synchronized, when, after time synchronized, PLC carries out operational analysis, perform instruction, and this instruction feedback to oil pumper is carried out automatic start-stop, it is achieved that opens automatically controls.The autocontrol method implementing to drive a well between " critical value method " has: operator are after host computer inputs start and stop well pressure value, after PLC reads the force value that instruction specifies start and stop well, carry out action planning, this instruction feedback to oil pumper is carried out automatic start-stop, it is achieved that opens automatically controls.
The method specifically includes following steps:
Step one, the ancient 4-120 well in Changzhi coal bed gas branch company producing well opens test between carrying out automatically；
Step 2, to the automatic control program opened between writing of PLC in this well Automated condtrol cabinet；
Step 3, the upper computer software interface opened between establishment automatically；
Step 4, according to opening automatically controlling of opening between classification carries out between corresponding；
Step 5, scene carries out the test that has a power failure, and checks that whether host computer is according to technical scheme execution alarm prompt and emergency safeguard measure；
Step 6, scene carries out piezometer transmission abnormality test, checks that whether host computer is according to the autocontrol method switching opened between technical scheme execution " Time Method ", and makes alarm prompt.
Wherein, between the automatic control program principle opened, as shown in Figure 1: opening between coal bed gas well is according to coal bed gas well flowing bottomhole pressure (FBHP) Changing Pattern, based on " Time Method " and " critical value method " two kinds of control methods, the marginal value of oil pumper start-stop time or oil pumper start and stop pressure is calculated by geological personnel, after PLC reads the instruction that host computer sets, carry out action planning, and feed back to oil pumper, make its timing node good according to the rules or pressure threshold automatic start-stop, thus that opens between realizing automatically controls.
The present invention solves in an open procedure causes stream to push back a liter problem because having a power failure；Flowing bottomhole pressure (FBHP) unusual fluctuations problem is caused, it is proposed to following solution because piezometer is abnormal:
1. power cut problem
When host computer continuous half time gather the passed major parameter of PLC such as jig frequency, frequency, electric current are " 0 " time, it is judged that this well is power down mode.Now host computer can make alarm prompt, reminds operator to resubmit work order.When again sending a telegram here, PLC is by automatically controlling of opening between carrying out according to new work order.
2. flowing bottomhole pressure (FBHP) unusual fluctuations problem
For the well of lower going-into-well downforce meter, when continuous two hours of host computer or above collection PLC are spreaded pressure numerical value for " 0 ", automatically switch to the autocontrol method opened between " Time Method ", and remind operator to carry out time restriction at host computer；When piezometer gathers numeral appearance fluctuation beyond normal range, temporarily keep oil pumper previous status, and remind operator that piezometer is checked, the start-stop time is set simultaneously.
The present invention is by opening technical know-how research between coal bed gas well, and manufacturing parameter analysis in open procedure between coal bed gas well, the automatic control program principle opened between proposition, establish the autocontrol method opened between a set of coal bed gas well, and for the power cut problem occurred in an open procedure, flowing bottomhole pressure (FBHP) unusual fluctuations problem proposes resolving ideas, it is ensured that coal bed gas well is opening the even running in automatic control process.
The major significance of the present invention is in that that opens between coal bed gas well automatically controls, and solves the problem such as the power failure in an open procedure, flowing bottomhole pressure (FBHP) unusual fluctuations.Reduce working strength, improve work efficiency, provide new approaches for automatically controlling of opening between coal bed gas well.
Case study on implementation
Between Changzhi coal bed gas branch company ancient city production capacity well Gu 4-120 well in open procedure, use the method automatically controlled opened between the present invention:
First, PLC in this well Automated condtrol cabinet is programmed so that it is between having, open automatic control function.Secondly, it is judged that open classification between this well for " Time Method ".Then, perform according to corresponding autocontrol method.In ready-made upper computer software input service instruction, that opens between carrying out automatically controls.Finally, carry out scene and carry out problem tests such as having a power failure, pressure transmission is abnormal, and carry out one-week observation, the feasibility of assessment the method.So far, the control automatically that this well is opened between implementing is respond well, and in well opening time, interval is dripped, and produces tolerance 1200m3 daily.
The invention described above embodiment sequence number, just to describing, does not represent the quality of embodiment.
Embodiment of above is merely to illustrate the present invention; and it is not limitation of the present invention; those of ordinary skill about technical field; without departing from the spirit and scope of the present invention; can also make a variety of changes and modification; therefore all equivalent technical schemes fall within scope of the invention, and the scope of patent protection of the present invention should be defined by the claims.
Claims (4)
1. the autocontrol method opened between a coal bed gas well, it is characterized in that, this control method adopts the autocontrol method two ways driven a well between the autocontrol method implementing to drive a well between " Time Method " and enforcement " critical value method " to open between carrying out, wherein, the autocontrol method implementing to drive a well between " Time Method " is to control stream pressure for core, to determine an ETAD expected time of arrival and departure by computational analysis；The autocontrol method implementing to drive a well between " critical value method " is the well for lower going-into-well downforce meter, determines the marginal value of start and stop well pressure according to flowing bottomhole pressure (FBHP) decline or rise amplitude, opens between enforcement.
2. the autocontrol method opened between a kind of coal bed gas well according to claim 1, it is characterized in that, the autocontrol method driven a well between described enforcement " Time Method " is specifically: operator are after host computer inputs start and stop well time command, after PLC collects this instruction, return to host computer and carry out time synchronized, when after time synchronized, PLC carries out operational analysis, perform instruction, and this instruction feedback to oil pumper is carried out automatic start-stop, it is achieved that opens automatically controls.
3. the autocontrol method opened between a kind of coal bed gas well according to claim 2, it is characterized in that, the autocontrol method driven a well between described enforcement " critical value method " has: operator are after host computer inputs start and stop well pressure value, after PLC reads the force value that instruction specifies start and stop well, carry out action planning, this instruction feedback to oil pumper is carried out automatic start-stop, it is achieved that opens automatically controls.
4. the autocontrol method opened between a kind of coal bed gas well according to claim 1-3 any one, it is characterised in that
Described autocontrol method specifically includes following steps:
Step one, the well in coal bed gas company producing well opens test between carrying out automatically；
Step 2, to the automatic control program opened between writing of PLC in this well Automated condtrol cabinet；
Step 3, the upper computer software interface opened between establishment automatically；
Step 4, according to opening automatically controlling of opening between classification carries out between corresponding；
Step 5, scene carries out the test that has a power failure, and checks that whether host computer is according to technical scheme execution alarm prompt and emergency safeguard measure；
Step 6, scene carries out piezometer transmission abnormality test, checks that whether host computer is according to the autocontrol method switching opened between technical scheme execution " Time Method ", and makes alarm prompt.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610154841.7A CN105804701B (en) | 2016-03-18 | 2016-03-18 | A kind of autocontrol method opened between coal bed gas well |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610154841.7A CN105804701B (en) | 2016-03-18 | 2016-03-18 | A kind of autocontrol method opened between coal bed gas well |
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| CN105804701A true CN105804701A (en) | 2016-07-27 |
| CN105804701B CN105804701B (en) | 2018-03-23 |
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| CN201610154841.7A Active CN105804701B (en) | 2016-03-18 | 2016-03-18 | A kind of autocontrol method opened between coal bed gas well |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107339083A (en) * | 2017-07-28 | 2017-11-10 | 中国石油天然气股份有限公司 | A kind of flowing bottomhole pressure (FBHP) control method of coal bed gas well |
| CN109209303A (en) * | 2017-06-29 | 2019-01-15 | 中国石油天然气股份有限公司 | A kind of mining control method of coal bed gas well |
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| CN2476641Y (en) * | 2001-04-10 | 2002-02-13 | 石油大学(北京) | Automatic control device for beam-pumping unit |
| CN201236680Y (en) * | 2008-07-29 | 2009-05-13 | 北京康达永宜科技有限公司 | Automatic intermittent oil pumping control device |
| US20090255670A1 (en) * | 2005-08-10 | 2009-10-15 | The Kansai Electric Power Co., Inc. | Method of Monitoring Underground Diffusion of Carbon Dioxide |
| CN102122161A (en) * | 2010-12-31 | 2011-07-13 | 中国石油天然气股份有限公司 | System and method for controlling interval pumping of oil well |
| CN105239967A (en) * | 2015-10-20 | 2016-01-13 | 中国石油天然气股份有限公司 | Automatic control method of plunger gas-lift liquid drainage production of oil-gas well |
-
2016
- 2016-03-18 CN CN201610154841.7A patent/CN105804701B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2476641Y (en) * | 2001-04-10 | 2002-02-13 | 石油大学(北京) | Automatic control device for beam-pumping unit |
| US20090255670A1 (en) * | 2005-08-10 | 2009-10-15 | The Kansai Electric Power Co., Inc. | Method of Monitoring Underground Diffusion of Carbon Dioxide |
| CN201236680Y (en) * | 2008-07-29 | 2009-05-13 | 北京康达永宜科技有限公司 | Automatic intermittent oil pumping control device |
| CN102122161A (en) * | 2010-12-31 | 2011-07-13 | 中国石油天然气股份有限公司 | System and method for controlling interval pumping of oil well |
| CN105239967A (en) * | 2015-10-20 | 2016-01-13 | 中国石油天然气股份有限公司 | Automatic control method of plunger gas-lift liquid drainage production of oil-gas well |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109209303A (en) * | 2017-06-29 | 2019-01-15 | 中国石油天然气股份有限公司 | A kind of mining control method of coal bed gas well |
| CN107339083A (en) * | 2017-07-28 | 2017-11-10 | 中国石油天然气股份有限公司 | A kind of flowing bottomhole pressure (FBHP) control method of coal bed gas well |
| CN107339083B (en) * | 2017-07-28 | 2019-08-02 | 中国石油天然气股份有限公司 | A kind of flowing bottomhole pressure (FBHP) control method of coal bed gas well |
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