CN106639993B - The oil/gas well multi-stage perforator method of ignition based on rapid pressure detection - Google Patents
The oil/gas well multi-stage perforator method of ignition based on rapid pressure detection Download PDFInfo
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- CN106639993B CN106639993B CN201710043975.6A CN201710043975A CN106639993B CN 106639993 B CN106639993 B CN 106639993B CN 201710043975 A CN201710043975 A CN 201710043975A CN 106639993 B CN106639993 B CN 106639993B
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- 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
- E21B43/11—Perforators; Permeators
- E21B43/116—Gun or shaped-charge perforators
- E21B43/1185—Ignition systems
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- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Control Of Fluid Pressure (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The invention discloses the oil/gas well multi-stage perforator methods of ignition detected based on rapid pressure, are specifically implemented according to the following steps: step 1: input direct-current voltage；Step 2: voltage transformation control is carried out to the DC voltage inputted in step 1.The present invention carries out threshold pressure differential detection to pressure using Fixed Time Interval, can effectively shorten detection time, and effectively prevent being repeatedly detected.
Description
Technical field
The invention belongs to oil/gas well detonating technique fields, and in particular to a kind of oil/gas well based on rapid pressure detection is multistage
Exploding perforating hole method.
Background technique
Oilfield old well, which refers to, has been put into life normally producing, within this period to take measures again to it
Produce well.New well refers to need the oil well for going into operation to oil field progress modification scenario to extend stable production period and improve recovery ratio.?
In perforating oil gas well operating process using pressure coding, it is directed to new well and suppresses that effect is good, pressure amplitude variation is obvious, perforation
Success rate is higher, close to absolutely；In contrast, bigger for the newer well of exploitation difficulty of old well, hole condition condition is more multiple
Miscellaneous, the pressure holding effect for being mainly reflected in old well is poor, it is smaller to suppress rear down-hole pressure variation, and perforation success rate is very low or even pressure
The coding method of ignition cannot use.
Multistage pressure detonation mode based on similarity principle, solved the problems, such as interlayer, while also solving common
The problem of pressure blasting mode single value pressure detecting, substantially increase the accuracy rate of detonation；But this method is only applicable to pressure
Change greatly, the new well that pressure holding effect is good, it is slow there are pressure change due to the old well in oil field the problems such as, be easy to cause and suppress not
Successfully as a result, for the old well of down-hole pressure variation unobvious (gas leakage, leakage pressure), it can not effectively distinguish and be previously set
Pressure coding, causes engineering accident, construction delay and property loss.
Using the method for detecting pressure pulse number in the time at equal intervals, accurately identifies certain grade of priming device and carries out perforation,
Improve the success rate of the detonation of multistage detonation device.This method is suitable for operating for the complex hole condition exploding perforating hole of old well, can
Effectively to carry out detection and accurate judgement to underground each pressure change stage in lesser pressure range, overcome down
Interference effect during well ensure that the accurate safety of detonation carries out.But the pressure detection method wherein used is initial
Point slope detection method, be easy to cause pressure detecting repeatedly in this way, and detection time is longer, and to suppressing on well, equipment requirement is higher,
Improve the labor intensity for suppressing operator.
In conclusion to solve the above-mentioned problems, needing to shorten the pressure detecting time using a kind of new method avoiding instead
Reinspection is surveyed, and the labor intensity for suppressing operator is reduced, to achieve the purpose that improve equipment service efficiency.
Summary of the invention
The object of the present invention is to provide a kind of oil/gas well multi-stage perforator methods of ignition based on rapid pressure detection, solve
Existing detonation mode be easy to cause pressure detecting repeatedly the problem of.
The technical scheme adopted by the invention is that the present invention is based on the oil/gas well multi-stage perforator detonation sides of rapid pressure detection
Method is specifically implemented according to the following steps:
Step 1: input direct-current voltage, DC voltage are 12V~16V；
Step 2: voltage transformation control being carried out to the DC voltage inputted in step 1, step includes:
Step 2.1: the pressure signal that digitial controller obtains pressure sensor detects, and whether judges pressure signal
Meet ascent stage Rule of judgment, if conditions are not met, continuing to acquire pressure signal；Otherwise, it is sequentially completed pressure maintaining section, descending branch is sentenced
It is disconnected, static pressure force value is then measured, step 2.2 is transferred to；
Step 2.2: digitial controller carries out the detection of pulse number, the pulse number and the pulse number phase of setting of detection
Meanwhile starting ignition exports after the set time set before going into the well by host computer, is transferred to step 2.3；Otherwise, it is transferred to step
2.1；
Step 2.3: after the completion of ignition duration, close power switch tube MOSFETQ1, power switch tube MOSFETQ2,
Power switch tube MOSFETQ3 and power switch tube MOSFETQ4 completes the detonation of oil/gas well multi-stage perforator；
Wherein, in step 2.1 ascent stage judgement specifically:
A significant figure strong point is sampled, the pressure value p1 ' of a-th point of pressure value p4 ' and first point are made the difference, if
Pressure difference is greater than given threshold w1, then digitial controller is determined as the ascent stage, is then transferred to the judgement of pressure maintaining section；Otherwise, continue to turn
Enter the judgement of ascent stage.
The features of the present invention also characterized in that:
The judgement of pressure maintaining section in step 2.1 specifically:
B significant figure strong point of continuous acquisition, compared with the pressure value p1 ' at the first of the ascent stage significant figure strong point, such as
Fruit is greater than default starting pressure, is pressure maintaining section, is transferred to the judgement of descending branch；Otherwise, it is transferred to the judgement of ascent stage.
The judgement of descending branch in step 2.1 specifically:
C significant figure strong point is sampled, by the pressure of the pressure value p2 ' at c-th of significant figure strong point and first significant figure strong point
Force value p3 ' compares, if pressure difference is less than given threshold w2, digitial controller is judged as descending branch, and it is quiet to be then transferred to measurement
Pressure value；Otherwise, it is transferred to the judgement of ascent stage.
Step 2.1 measures static pressure force value specifically:
After postponing 30s, the one significant figure strong point of acquisition in each second, d significant figure strong point of continuous acquisition, and seek that d is a to be had
The average value of effect data point obtains static pressure force value.
Step 2.2 specifically:
Quick pressing, pressure maintaining and pressure release on well after measurement static pressure force value, underground digitial controller continuous acquisition e have
It imitates the pressure value of data point and is made the difference with the static pressure measured in the step 2.1, when e difference is both greater than maximum threshold,
Ascent stage and the pressure maintaining section of pulse, later the pressure value at f significant figure strong point of underground digitial controller continuous acquisition and with institute
It states the static pressure measured in step 2.1 to make the difference, is the descending branch of pulse, underground number when f difference is both less than minimum threshold
Controller repeats aforesaid operations and judge the pulse number suppressed on well in the set time, with go into the well before the pulse that sets of host computer it is a
Number compares, and exports ignition order if number is equal, at the end of the set time that host computer is set before going into the well and completes detonation
Process；Otherwise, ignition order is not exported at the end of the set time that host computer is set before going into the well, is transferred to the judgement of ascent stage.
Significant figure strong point are as follows: acquire a pressure value point every 1s, seek the average value of n point as a valid data
Point.
The beneficial effects of the present invention are: the present invention is based on the oil/gas well multi-stage perforator method of ignition of rapid pressure detection, it is real
The full-digital control for having showed the multistage detonation of the complicated conditions down-hole for complicated conditions down-hole, especially oilfield old well, is adopted
It with the method for detecting pressure pulse number in the set time, accurately identifies certain grade of priming device and carries out perforation, improve multistage rise
The success rate of the detonation of quick-fried device.The method of the present invention is suitable for operating for the complex hole condition exploding perforating hole of old well, can be smaller
Pressure range in effectively to underground each pressure change stage carry out faster detection and accurately judgement, overcome
Interference effect during going into the well ensure that the accurate safety of detonation carries out.Pressure difference is carried out to pressure using Fixed Time Interval
Threshold test, can effectively shorten detection time, and effectively prevent being repeatedly detected.
Detailed description of the invention
Fig. 1 is the control circuit schematic diagram for the multistage detonation device that the method for the present invention uses；
Fig. 2 is the pressure blasting timing diagram that the method for the present invention uses；
Fig. 3 is pressure rapid increase figure during detonation is suppressed；
Fig. 4 is pressure interlude rising figure during detonation is suppressed；
Fig. 5 is the slow rising figure of pressure during detonation is suppressed；
Fig. 6 is the pressure curve threshold test schematic diagram that the method for the present invention uses.
In figure, 1. power supplys, 2. supply voltage supervisions, 3. regulated power supplies, 4. driving circuits, 5. communication interfaces, 6. memories,
7. digitial controller, 8. pressure sensors, 9. temperature sensors, 10. generating positive and negative voltage translation circuits, 11. output ends.
Specific embodiment
The following describes the present invention in detail with reference to the accompanying drawings and specific embodiments.
It is more using oil/gas well shown in FIG. 1 the present invention is based on the oil/gas well multi-stage perforator method of ignition of rapid pressure detection
The controling circuit structure of grade exploding perforating hole device is (referring to the patent " control circuit and controlling party of oil/gas well multi-stage perforator initiator
Method ", the applying date: 2014.5.6, application number: 2014101889681), wherein including power supply 1, supply voltage supervision 2, pressure stabilizing electricity
Source 3, driving circuit 4, communication interface 5, memory 6, digitial controller 7, pressure sensor 8, temperature sensor 9, generating positive and negative voltage
Translation circuit 10, output end 11.
In order to improve the accuracy rate of command recognition, for old well pressure variation slowly, gas leakage the problems such as, propose such as Fig. 2
Shown in pressure blasting timing, to accurately be safely completed multistage detonation.
Since down-hole pressure situation is complicated, it is therefore desirable to which different conditions down-holes is carried out comprehensive analysis, Fig. 3, Fig. 4, Fig. 5
Caused by being the pressure rapid increase being likely to occur during detonation is suppressed, the rising of pressure interlude respectively and being pressed as leakage
The different down-hole pressure situations that pressure slowly rises.
In summary underground situation proposes the oil/gas well multi-stage perforator detonation based on rapid pressure detection of the application
Method.This method will test data transmission to digitial controller 7 by pressure sensor 8, successively carry out phase by digitial controller 7
Judgement is closed, deterministic process is divided into following five stages, corresponding with five stages of Fig. 2 respectively:
Stage 1. (ascent stage, time: 0~t1), as Fig. 2, Fig. 6 stage 1. shown in
During going into the well, a pressure value point is acquired every 1s, ten point filter primary waves (seek being averaged for ten points
Value) it is used as a significant figure strong point, 15 significant figure strong point a1, a2 ... a15 are acquired, which is dynamic sliding data,
I.e. after 15 significant figure strong point acquisitions completely of a1 to a15, (the 16th effectively since filtering acquisition significant figure strong point next time
Data point), it successively replaces, the collected newest valid data of a1=a2, a2=a3 ... a15=, while carrying out operation a15-
A1 (the pressure value p1 ' of a-th point of pressure value p4 ' and first point are made the difference, as Fig. 6 stage 1. shown in), work as a15-a1 >
When 2MPa (given threshold w1, the value can be by being set before going into the well, i.e. p4 '-p1 ' > w1), then digitial controller is determined as
A1 numerical value is saved (deposit a_com), terminates ascent stage, be transferred to the judgement of pressure maintaining section by the ascent stage；Otherwise, continue to turn
Enter the judgement of ascent stage.
Stage 2. (pressure maintaining section, time: t1~t2), as Fig. 2, Fig. 6 stage 2. shown in
Ten significant figure strong points of continuous acquisition, if there is eight significant figure strong points to meet ai-a_com in ten significant figure strong points
(the default starting pressure of setting, the value can have > 2MPa by being set before going into the well with first of the stage 1. (ascent stage)
The pressure value p1 ' of effect data point compares) when, then it is assumed that packing stage successfully identifies, digitial controller 7 thinks 1. stage in stage
2. being to suppress the period at initial stage, it is transferred to the judgement of descending branch；Otherwise, be transferred to the stage 1. (ascent stage) judgement, a1 to a15 data
Continue sliding storage；
Stage 3. (descending branch, time: t2~t3), as Fig. 2, Fig. 6 stage 3. shown in
15 significant figure strong points of continuous acquisition carry out operation ai-a_com (i.e. by the pressure at the 15th significant figure strong point
Force value p2 ' is compared with the pressure value p3 ' at first significant figure strong point), when detecting ai-a_com < 0.5MPa (given threshold
W2, the value can be by being set before going into the well, i.e. p2 '-p3 ' < w2), then digitial controller 7 is judged as descending branch (such as Fig. 6 rank
Section 3. shown in), so that it is determined that 1. 2. 3. the stage was one and suppressed start command the stage stage, digitial controller 7 is transferred to quiet at this time
The pressure measurement stage；If the operation ai-a_com that 15 valid data points carry out is all larger than 1MPa, (setup pressure value, which can
By being set before going into the well), then it is assumed that descending branch identification is invalid, and (digitial controller 7 is considered that priming device is when going into the well
Between section), return stage 1. (ascent stage) judge, a1 to a15 data continue sliding stores；
Stage 4. (measurement static pressure force value, time: t3~t4), as Fig. 2 stage 4. shown in
3. stage judges start command success after, the one significant figure strong point of acquisition in each second, ten significant figures of continuous acquisition
Strong point and the average value for seeking ten significant figure strong points obtain static pressure force value, and (such as Fig. 2 stage is 4. shown, and static pressure average value is
p1)。
Stage 5. (pulse number detection, time: t4~t5), as Fig. 2 stage 5. shown in
The pulse number of set time (being set before going into the well by host computer) detects, the stage 4. after Quick pressing on well,
Pressure maintaining and pressure release, the pressure value at 7 five significant figure strong points of continuous acquisition of underground digitial controller and with measured in the step 2.1
Static pressure make the difference, when five differences are both greater than maximum threshold (host computer setting), system be considered pulse ascent stage and
Pressure maintaining section, later the pressure value at 7 five significant figure strong points of continuous acquisition of underground digitial controller and with measured in the step 2.1
Static pressure make the difference, be the descending branch of pulse, underground number control when five differences are both less than minimum threshold (host computer setting)
System think highly of the pulse number that multiple aforesaid operations judges to suppress on well in the set time, with go into the well before host computer setting pulse number
It compares, ignition order completion is exported if number is equal, at the end of the set time that host computer is set before going into the well and was detonated
Journey；Otherwise, ignition order is not exported at the end of the set time that host computer is set before going into the well, is transferred to the judgement of ascent stage.
Stage 1. the stage 2. the stage 3. the stage 4. the stage 5. in underground work, on well along with by the time provided into
Row suppresses operation, and 1. the stage is process of suppressing, the pressure value that pressure value is played for underground minimum, 2. the stage is stage 1. pressure value
Packing stage, 3. the stage is the pressure release stage on well, 5. 4. it is to play corresponding pulse that the stage such as is at static pressure stage to be measured, the stage
The number stage.
Wherein, the operating parameter of digitial controller 7 is before going into the well by the communication setting with host computer.
The present invention is based on the oil/gas well multi-stage perforator method of ignition of rapid pressure detection, the control electricity in above-mentioned Fig. 1 is relied on
Road is specifically implemented according to the following steps:
Step 1: input direct-current voltage, DC voltage are 12V~16V；
Step 2: voltage transformation control being carried out to the DC voltage inputted in step 1, step includes:
Step 2.1: the pressure signal that digitial controller 7 obtains pressure sensor 8 detects, and judges that pressure signal is
It is no to meet ascent stage (stage is 1.) Rule of judgment, if conditions are not met, continuing to acquire pressure signal；Otherwise, it is sequentially completed pressure maintaining section
The judgement of (stage is 2.), descending branch (stage is 3.) then measures static pressure force value (stage is 4.), is transferred to step 2.2；
Step 2.2: digitial controller carries out the detection (stage is 5.) of pulse number, the pulse number of detection and the arteries and veins of setting
Rush number it is identical when, before going into the well by host computer setting set time after starting ignition export, be transferred to step 2.3；Otherwise,
It is transferred to step 2.1；
Step 2.3: after the completion of ignition duration, close power switch tube MOSFETQ1, power switch tube MOSFETQ2,
Power switch tube MOSFETQ3 and power switch tube MOSFETQ4 completes the detonation of oil/gas well multi-stage perforator.
Claims (6)
1. the oil/gas well multi-stage perforator method of ignition based on rapid pressure detection, which is characterized in that specifically real according to the following steps
It applies:
Step 1: input direct-current voltage, DC voltage are 12V~16V；
Step 2: voltage transformation control being carried out to the DC voltage inputted in step 1, step includes:
Step 2.1: the pressure signal that underground digitial controller obtains pressure sensor detects, and whether judges pressure signal
Meet ascent stage Rule of judgment, if conditions are not met, continuing to acquire pressure signal；Otherwise, it is sequentially completed pressure maintaining section, descending branch is sentenced
It is disconnected, static pressure force value is then measured, step 2.2 is transferred to；
Step 2.2: underground digitial controller carries out the detection of pulse number, the pulse number and the pulse number phase of setting of detection
Meanwhile starting ignition exports after the set time set before going into the well by host computer, is transferred to step 2.3；Otherwise, it is transferred to step
2.1；
Step 2.3: after the completion of ignition duration, closing power switch tube MOSFETQ1, power switch tube MOSFETQ2, power
Switching tube MOSFETQ3 and power switch tube MOSFETQ4 completes the detonation of oil/gas well multi-stage perforator；
Wherein, in step 2.1 ascent stage judgement specifically:
A significant figure strong point is sampled, by the pressure value of the pressure value p4 ' at a-th of significant figure strong point and first significant figure strong point
P1 ' makes the difference, if pressure difference is greater than given threshold w1, underground digitial controller is determined as the ascent stage, is then transferred to pressure maintaining section
Judgement；Otherwise, continue the judgement for being transferred to the ascent stage.
2. the oil/gas well multi-stage perforator method of ignition according to claim 1 based on rapid pressure detection, which is characterized in that
The judgement of pressure maintaining section in the step 2.1 specifically:
B significant figure strong point of continuous acquisition, the pressure by each significant figure strong point with first significant figure strong point of ascent stage
Force value p1 ' makes the difference respectively, if there is the difference at 80% significant figure strong point to be all larger than default starting pressure in b significant figure strong point
Power is pressure maintaining section, is transferred to the judgement of descending branch；Otherwise, it is transferred to the judgement of ascent stage.
3. the oil/gas well multi-stage perforator method of ignition according to claim 1 based on rapid pressure detection, which is characterized in that
The judgement of descending branch in the step 2.1 specifically:
C significant figure strong point is sampled, the pressure value p2 ' at c-th of significant figure strong point and first in c significant figure strong point are had
The pressure value p3 ' of effect data point compares, if pressure difference is less than given threshold w2, underground digitial controller is judged as decline
Then section is transferred to measurement static pressure force value；Otherwise, it is transferred to the judgement of ascent stage.
4. the oil/gas well multi-stage perforator method of ignition according to claim 1 based on rapid pressure detection, which is characterized in that
The step 2.1 measures static pressure force value specifically:
After postponing 30s, the one significant figure strong point of acquisition in each second, d significant figure strong point of continuous acquisition, and seek d significant figure
The average value at strong point obtains static pressure force value.
5. the oil/gas well multi-stage perforator method of ignition according to claim 1 based on rapid pressure detection, which is characterized in that
The step 2.2 specifically:
Quick pressing, pressure maintaining and pressure release on well, underground e significant figure of digitial controller continuous acquisition after measurement static pressure force value
The pressure value at strong point simultaneously makes the difference with the static pressure measured in the step 2.1, is arteries and veins when e difference is both greater than maximum threshold
The ascent stage of punching and pressure maintaining section, later the pressure value at f significant figure strong point of underground digitial controller continuous acquisition and with the step
The static pressure measured in rapid 2.1 makes the difference, and is the descending branch of pulse when f difference is both less than minimum threshold, underground is digital control
Think highly of the pulse number that multiple aforesaid operations judge to suppress on well in the set time, with go into the well before host computer set pulse number phase
Compare, exports ignition order if number is equal, at the end of the set time that host computer is set before going into the well and complete initiation process；
Otherwise, ignition order is not exported at the end of the set time that host computer is set before going into the well, is transferred to the judgement of ascent stage.
6. the oil/gas well multi-stage perforator method of ignition based on rapid pressure detection described in -5 any one according to claim 1,
It is characterized in that, the significant figure strong point are as follows: acquire a pressure value point every 1s, seek the average value of n point as one
Significant figure strong point.
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| CN108894758B (en) * | 2018-06-05 | 2020-10-27 | 西安物华巨能爆破器材有限责任公司 | Oil-gas well multistage perforation detonation control method based on accelerometer |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4527636A (en) * | 1982-07-02 | 1985-07-09 | Schlumberger Technology Corporation | Single-wire selective perforation system having firing safeguards |
| CN104005740A (en) * | 2014-05-06 | 2014-08-27 | 西安理工大学 | Control circuit and control method for oil gas well multistage perforation detonator |
| CN205260014U (en) * | 2015-10-29 | 2016-05-25 | 西安物华巨能爆破器材有限责任公司 | A multistage pressure code initiating device for oil well perforation |
-
2017
- 2017-01-19 CN CN201710043975.6A patent/CN106639993B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4527636A (en) * | 1982-07-02 | 1985-07-09 | Schlumberger Technology Corporation | Single-wire selective perforation system having firing safeguards |
| CN104005740A (en) * | 2014-05-06 | 2014-08-27 | 西安理工大学 | Control circuit and control method for oil gas well multistage perforation detonator |
| CN205260014U (en) * | 2015-10-29 | 2016-05-25 | 西安物华巨能爆破器材有限责任公司 | A multistage pressure code initiating device for oil well perforation |
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