CN109736772A - It is a kind of to return out the simple pressure control drilling method monitored and system based on annular space - Google Patents
It is a kind of to return out the simple pressure control drilling method monitored and system based on annular space Download PDFInfo
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Abstract
It is a kind of to return out the simple pressure control drilling system monitored based on annular space, pipeline, slurry tank are returned out including pit shaft, drill string, density sensor, flow sensor, the industrial control computer for pressure control drilling annular pressure analysis and control software, pressure sensor, automatic throttle, injection pipeline, annular space；In injection pipeline one end connection drill string upper end, other end insertion slurry tank, the bottom end of drill string is inserted into pit shaft, and annular space returns out pipeline one end and is connected with the outlet of pit shaft upper end and in other end insertion slurry tank；Density sensor, flow sensor, pressure sensor and automatic throttle return out pipeline sequence along annular space and are arranged, density sensor, flow sensor, pressure sensor and automatic throttle signal output end be connected with the signal input part of industrial control computer.This system structure is simple and convenient to operate, and can accurately be controlled the annular pressure section in drilling process, be avoided or mitigate Underwell leakage or flooded conditions.
Description
Technical field
The present invention relates to petroleum engineering drilling technology field more particularly to it is a kind of returned out based on annular space monitor it is simple
Pressure control drilling method and system.
Background technique
In recent years, being growing with petroleum natural gas exploration scale, narrow Density Window bad ground is increasingly
It is more, it is careless slightly in drilling process just to will appear leakage, overflow phenomena, or even leakage occur and deposit cash as serious shadow together with overflow
Underground construction safety and construction efficiency are rung.Therefore, it is accurately controlled in real time for the annular pressure in drilling process, for
Improving narrow Density Window strata drilling construction safety and construction efficiency has important practical significance.
In recent years, many petroleum units also develop managed pressure drilling system, but the scale of construction is larger mostly, and manufacturing cost is higher,
It is not easy to large-scale promotion application.
Summary of the invention
In view of the deficiencies of the prior art, it and in order to real-time and accurately control the annular pressure section in drilling process, avoids
Or mitigate Underwell leakage or flooded conditions, the invention proposes it is a kind of returned out based on annular space the simple pressure control drilling system monitored and
Method.
To achieve the above object, the present invention provides technical solution below:
It is a kind of to return out the simple pressure control drilling system monitored based on annular space, including pit shaft, drill string, the first automatic flat-plate valve,
Second automatic flat-plate valve, density sensor, flow sensor, creeps into annular pressure analysis for pressure control at third automatic flat-plate valve
Pipeline, mud are returned out with industrial control computer, pressure sensor, automatic throttle, injection pipeline, the annular space of control software
Tank；Described injection pipeline one end is connected in drill string upper end and other end insertion slurry tank, and the bottom end of the drill string is inserted into pit shaft
Interior, the annular space returns out pipeline one end and is connected with the outlet of pit shaft upper end, and the other end is inserted into slurry tank；The density sensing
Device, flow sensor, pressure sensor and automatic throttle return out pipeline sequence along annular space and are arranged, the density sensor, stream
The signal output end of quantity sensor, pressure sensor and automatic throttle with the signal input part phase of industrial control computer
Even, the first automatic flat-plate valve, the second automatic flat-plate valve, third automatic flat-plate valve, automatic throttle signal input part with
The signal output end of industrial control computer is connected.
In the present invention, described a kind of the simple pressure control drilling system monitored, the density sensing to be returned out based on annular space
Device is connected to annular space after being connected with the first automatic flat-plate valve, the second automatic flat-plate valve, third automatic flat-plate valve by pipeline and returns
Out on pipeline.
In the present invention, described a kind of the simple pressure control drilling system monitored, the drilling circulation to be returned out based on annular space
Injection pipeline, drilling circulation annular space return out and are connected separately with slush pump, automatic throttle on pipeline.
It is a kind of to return out the simple pressure control drilling method monitored based on annular space, include the following steps:
The simple pressure control drilling system monitored is returned out in S1, foundation based on annular space；
S2, it opens and opens in time drilling process later two, m depth point, the serial number i of depth point are chosen in Open-Hole Section
It indicates, vertical depth DiIt indicates, i=1 ... .m, if different depth point DiThe pore pressure P at placepi, different depth DiThe fracture pressure at place
Pfi, drilling fluid density ρd, actual well drilled depth be D, actual well drilled circulation discharge capacity be Q, circulation discharge capacity testing standard point be Qij、
Drill bit is in DiEach circulation discharge capacity testing standard point Q when depthijCorresponding PWD bottom pressure value is Ppij, in different depth point Di
Place, by Qi1→Qi2→....QijDischarge capacity is recycled respectively, and maximum pump discharge is no more than the drilling well largest loop discharge capacity allowed,
Middle j is a numerical value of discharge capacity, records corresponding PWD bottom pressure value P under each circulation discharge capacitypi1→Ppi2→....Ppij；
S3, it is directed to protective casing, bit location is calculated in different depth point D by industrial control computeriSentence difference
Recycle discharge capacity QijBottom pressure value when being recycled, depth point value and circulation discharge capacity value are identical as in step S2, if
Each circulation discharge capacity standard point QijUnder corresponding bottom pressure value Pcij, by Qi1→Qi2→....QijDischarge capacity is recycled respectively,
Wherein j is a numerical value of discharge capacity, records corresponding bottom pressure value P under each circulation discharge capacityci1→Pci2→....Pcij；
Assume that wellbore is the smooth hole of rule when S4, calculating bottom pressure, excludes practical irregular borehole and roughness
Influence, therefore software model needs to correct, and calculates corresponding inventionannulus flow pressure drop amendment system under different depth point i different displacements
Number: (Ppi1-Ppi-1,1-0.00981*ρd*Di)/(Pci1-Pci-1,1-0.00981*ρd*Di)→(Ppi2-Ppi-1,2-0.00981*ρd*
Di)/(Pci2-Pci-1,2-0.00981*ρd*Di)→....(Ppij-Ppi-1,j-0.00981*ρd*Di)/(Pcij-Pci-1,j-
0.00981*ρd*Di), wherein Pp0,1,Pp0,2....Pp0,jFor the observed pressure under different displacements at well head, Pc0,1,Pc0, 2....Pc0,jFor the calculating pressure under different displacements at well head, since well head is depth zero point, so Pp0,1,Pp0,2....Pp0,j,
Pc0,1,Pc0,2....Pc0,jIt is equal to 0；
S5, production correction factor plate draw the inventionannulus flow pressure drop amendment system under the conditions of different depth point different displacements
Number curve, for actual well drilled depth D and actual cycle discharge capacity Q different from above-mentioned drilling depth DiWith circulation discharge capacity QijStandard point
When, inventionannulus flow pressure drop correction factor, and the pressure correction that will be converted into should be obtained by the way of Lagrangian linear interpolation
Coefficient typing industrial control computer；
During S6, wellbore construction, when the pressure that pressure sensor is monitored is lower than the specified pressure-bearing energy of density sensor
When power, the first automatic flat-plate valve and third automatic flat-plate valve are opened by industrial control computer, close the second automatic flat-plate valve,
The initial opening state of automatic throttle is 50%；It is held when the pressure that pressure sensor is monitored is higher than the specified of density sensor
It when pressure energy power, is controlled by industrial control computer and opens the second automatic flat-plate valve, close the first automatic flat-plate valve and third certainly
Dynamic flap type, the initial opening state of automatic throttle are 50%；
S7, starting slush pump start the cycle over, if annular space returns out monitoring flow Qi, density pi, pressure Pi, current depth DiUnder
Bottom pressure be Pdi；System monitoring to annular space return out monitoring flow Qi, density pi, pressure PiIt is directly entered Industry Control meter
Calculation machine carries out calculating analysis, obtains current depth DiUnder bottom pressure Pdi, while with depth point DiThe pore pressure P at placepi
With leakage pressure PfiIt is compared；
If Ppi<Pdi<Pfi, system only makees monitoring processing；
If Ppi>Pdi, system can control automatic throttle and reduce aperture, until Ppi<PdiUntil；
If Pdi>Pfi, system can control automatic throttle and increase aperture, until Pdi<PfiUntil.
In the present invention, it is described it is a kind of return out the simple pressure control drilling method monitored based on annular space, in the step S2,
Depth point i value includes upper layer casing shoe depth and shaft bottom, and casing shoe depth point i value is 1.
The beneficial effects of the present invention are: the annular pressure that can real-time and accurately control in drilling process through the invention cuts open
Face avoids or mitigates Underwell leakage or flooded conditions, and the structure of system is simple and convenient to operate, convenient for popularization.
Detailed description of the invention
Fig. 1 is that the present invention is based on annular spaces to return out the simple pressure control drilling system schematic diagram monitored；
Fig. 2 is inventionannulus flow pressure drop correction coefficient curves figure of the present invention；
In figure: 1- pit shaft, 2- drill string, the first automatic flat-plate of 3- valve, 4- density sensor, the second automatic flat-plate of 5- valve, 6-
Third automatic flat-plate valve, 7- flow sensor, 8- industrial control computer, 9- pressure sensor, 10- automatic throttle, 11- note
Enter pipeline, 12- annular space returns out pipeline, 13- slush pump, 14- slurry tank.
Specific embodiment
Below in conjunction with the attached drawing in inventive embodiments, technical solution in the embodiment of the present invention carries out clear, complete
Ground description.
It is as shown in Figure 1 a kind of the simple pressure control drilling system monitored, including pit shaft 1, drill string 2, to be returned out based on annular space
One automatic flat-plate valve 3, the second automatic flat-plate valve 5, third automatic flat-plate valve 6, density sensor 4, flow sensor 7, for controlling
Industrial control computer 8, pressure sensor 9, the automatic throttle 10, injection pipe of the pressure analysis of drilling annular pressure and control software
Line 11, annular space return out pipeline 12, slurry tank 14；Described 11 one end of injection pipeline is connected to 2 upper end of drill string and the other end is inserted into mud
In tank 14, the bottom end of the drill string 2 is inserted into pit shaft 1, and the annular space returns out the outlet phase of 12 one end of pipeline with 1 upper end of pit shaft
Even, the other end is inserted into slurry tank 14；The density sensor 4, flow sensor 7, pressure sensor 9 and automatic throttle 10
It returns out pipeline 12 along annular space to be sequentially arranged, the density sensor 4, flow sensor 7, pressure sensor 9 and automatic throttle
10 signal output end is connected with the signal input part of industrial control computer 8, and the first automatic flat-plate valve 3, second is certainly
The signal output of dynamic flap type 5, third automatic flat-plate valve 6, the signal input part of automatic throttle 10 and industrial control computer 8
End is connected.
Further, the density sensor 4 is put down automatically with the first automatic flat-plate valve 3, the second automatic flat-plate valve 5, third
Plate valve 6 is connected to annular space after being connected by pipeline and returns out on pipeline 12.
Further, the drilling circulation injection pipeline 11, drilling circulation annular space return out and are connected separately with mud on pipeline 12
Stock pump 13, automatic throttle 10.
It is a kind of to return out the simple pressure control drilling method monitored based on annular space, include the following steps:
The simple pressure control drilling system monitored is returned out in S1, foundation based on annular space；
S2, it opens and opens in time drilling process later two, m depth point, the serial number i of depth point are chosen in Open-Hole Section
It indicates, vertical depth DiIt indicates, i=1 ... .m.If different depth point DiThe pore pressure P at placepi, different depth DiThe fracture pressure at place
Pfi, drilling fluid density ρd, actual well drilled depth be D, actual well drilled circulation discharge capacity be Q, circulation discharge capacity testing standard point be Qij、
Drill bit is in DiEach circulation discharge capacity testing standard point Q when depthijCorresponding PWD bottom pressure value is Ppij, in different depth point Di
Place, by Qi1→Qi2→....QijDischarge capacity is recycled respectively, and maximum pump discharge is no more than the drilling well largest loop discharge capacity allowed,
Middle j is a numerical value of discharge capacity, records corresponding PWD bottom pressure value P under each circulation discharge capacitypi1→Ppi2→....Ppij；
S3, it is directed to protective casing, bit location is calculated in different depth point D by industrial control computer 8iSentence difference
Recycle discharge capacity QijBottom pressure value when being recycled, depth point value and circulation discharge capacity value are identical as in step S2, if
Each circulation discharge capacity testing standard point QijUnder corresponding bottom pressure value Pcij, by Qi1→Qi2→....QijDischarge capacity is followed respectively
Ring, wherein j is a numerical value of discharge capacity, records corresponding bottom pressure value P under each circulation discharge capacityci1→Pci2→....Pcij；
Assume that wellbore is the smooth hole of rule when S4, calculating bottom pressure, excludes practical irregular borehole and roughness
Influence, therefore software model needs to correct, and calculates corresponding inventionannulus flow pressure drop amendment system under different depth point i different displacements
Number: (Ppi1-Ppi-1,1-0.00981*ρd*Di)/(Pci1-Pci-1,1-0.00981*ρd*Di)→(Ppi2-Ppi-1,2-0.00981*ρd*
Di)/(Pci2-Pci-1,2-0.00981*ρd*Di)→....(Ppij-Ppi-1,j-0.00981*ρd*Di)/(Pcij-Pci-1,j-
0.00981*ρd*Di).Wherein Pp0,1,Pp0,2....Pp0,jFor the observed pressure under different displacements at well head, Pc0,1,Pc0, 2....Pc0,jFor the calculating pressure under different displacements at well head, since well head is depth zero point, so Pp0,1,Pp0,2....Pp0,j,
Pc0,1,Pc0,2....Pc0,jIt is equal to 0；
S5, production correction factor plate draw the inventionannulus flow pressure drop amendment system under the conditions of different depth point different displacements
Number curve, for actual well drilled depth D and actual cycle discharge capacity Q different from above-mentioned drilling depth DiWith circulation discharge capacity QijStandard point
When, inventionannulus flow pressure drop correction factor, and the pressure correction that will be converted into should be obtained by the way of Lagrangian linear interpolation
Coefficient typing industrial control computer 8, convenient in subsequent calculating different depth point and bottom pressure under the conditions of different displacements
Accurate inventionannulus flow pressure drop correction factor is obtained with preceding method；
During S6, wellbore construction, when the monitored pressure of pressure sensor 9 is lower and specified lower than density sensor 4
When bearing capacity, the first automatic flat-plate valve 3 and third automatic flat-plate valve 6 are opened by industrial control computer 8, close second certainly
Dynamic flap type 5, the initial opening state of automatic throttle 10 are 50%；When the monitored pressure of pressure sensor 9 is higher and is higher than
It when the specified bearing capacity of density sensor 4, is controlled by industrial control computer 8 and opens the second automatic flat-plate valve 5, close the
One automatic flat-plate valve 3 and third automatic flat-plate valve 6, the initial opening state of automatic throttle 10 are 50%；
S7, starting slush pump 13 start the cycle over, if annular space returns out monitoring flow Qi, density pi, pressure Pi, current depth Di
Under bottom pressure be Pdi；System monitoring to annular space return out monitoring flow Qi, density pi, pressure PiIt is directly entered Industry Control
Computer 8 carries out calculating analysis, obtains current depth DiUnder bottom pressure Pdi, while with depth point DiThe pore pressure at place
PpiWith leakage pressure PfiIt is compared；
If Ppi<Pdi<Pfi, system only makees monitoring processing；
If Ppi>Pdi, system can control automatic throttle 10 and reduce aperture, until Ppi<PdiUntil；
If Pdi>Pfi, system can control automatic throttle 10 and increase aperture, until Pdi<PfiUntil.
Further, in step s 2, i value in depth point includes upper layer casing shoe depth and shaft bottom, depth point i value packet
Upper layer casing shoe depth is included, casing shoe depth point i value is 1, and depth point value is closeer more advantageous for annular pressure calculating；PWD
Pressure tester is mounted near drill bit, and test pressure is the annular space bottom pressure at bit depth.
Need to do following preparation before normal wellbore construction: injection 11 one end of pipeline connection 2 upper end of drill string, other end insertion
In slurry tank 14, the bottom end of drill string 2 is inserted into pit shaft 1, and annular space returns out 12 one end of pipeline and is connected with the outlet of 1 upper end of pit shaft,
The other end is inserted into slurry tank 14；Density sensor 4, flow sensor 7, pressure sensor 9 and automatic throttle 10 are set to
Annular space returns out on pipeline 12, the signal output of density sensor 4, flow sensor 7, pressure sensor 9 and automatic throttle 10
End is connected with the signal input part of industrial control computer 8, and the first automatic flat-plate valve 3, the second automatic flat-plate valve 5, third are certainly
Move flap type 6, the signal input part of automatic throttle 10 is connected with the signal output end of industrial control computer 8.Density sensing
Device 4 is connected to ring after being connected with the first automatic flat-plate valve 3, the second automatic flat-plate valve 5, third automatic flat-plate valve 6 by pipeline
Sky returns out on pipeline 12.
Mud is pumped into pit shaft 1 by slush pump 13 by injecting pipeline 11, and is returned out pipeline 12 by annular space and be back to mud
It starches in tank 14, at this point, density sensor 4, flow sensor 7, pressure sensor 9, automatic throttle 10 will inject pipeline respectively
The density signal of mud, flow signal, pressure signal, throttle valve opening signal pass to industrial control computer 8 in 11.
Further, pressure control drilling annular pressure analysis and control software are installed, based on industrial control computer 8
The bottom pressure value that bit location is calculated when being recycled at different depth point with different circulation discharge capacities.
The principle that the present invention is implemented is explained below in conjunction with an example:
The simple pressure control drilling system monitored is returned out in S1, foundation based on annular space；
S2, land oil field well one open casing setting depth 1050m, spud in two into the process, in order to calculate simplicity in naked eye
3 depth points are chosen in section, vertical depth is respectively D1=1050m, D2=1100m, D3=1150m, the Pore Pressure at different depth point
Power Pp1=11.12MPa, Pp2=11.65MPa, Pp3=12.18MPa, the fracture pressure P at different depth pointf1=14.42MPa,
Pf2=15.11MPa, Pf3=15.79MPa, drilling fluid density ρd=1.14g/cm3, circulation discharge capacity standard point is Qij=10,
15,20,25,30L/s, drill bit are in D1、D2、D3Each circulation discharge capacity standard point Q when depthijCorresponding PWD bottom pressure value Ppij
As shown in table 1；
Bottom pressure test data table at 1 different depth point of table
S3, it is directed to protective casing, bit location is calculated in different depth point D by industrial control computer 81=1050m,
D2=1100m, D3With different circulation discharge capacity Q at=1150mij=10,15,20,25, bottom pressure when 30L/s is recycled
It is as shown in table 2 to calculate data for value；
Bottom-hole pressure tables of data at 2 different depth point of table
S4, assume that wellbore is the smooth hole of rule when calculating bottom pressure, do not consider practical irregular borehole and coarse
The influence of degree, therefore software model needs to correct, and calculates different depth point D1=1050m, D2=1100m, D3=1150m is different
Discharge capacity Qij=10,15,20,25, corresponding inventionannulus flow pressure drop correction factor is as shown in table 3 under 30L/s；
Inventionannulus flow pressure drop correction factor table under 3 different depth different displacements of table
S5, production correction factor plate draw the inventionannulus flow pressure drop amendment system under the conditions of different depth point different displacements
Number curve, as shown in Figure 2；
A well other for same block, casing programme, well track, drilling tool structure, property of drilling fluid all with this well
It is identical, D=1080 meters of actual well drilled depth, actual cycle discharge capacity Q=22L/s, different from above-mentioned drilling depth D1、D2、D3And circulation
Discharge capacity Qij=10,15,20,25,30L/s standard point, obtained first by the way of Lagrangian linear interpolation 1050m and
The corresponding inventionannulus flow pressure drop correction factor of discharge capacity 22L/s is recycled under 1100m depth, then interpolation obtains following under 1080m depth
The corresponding inventionannulus flow pressure drop correction factor of ring discharge capacity 22L/s.It calculates as follows:
The corresponding inventionannulus flow pressure drop correction factor of discharge capacity 22L/s is recycled under 1050m depth to calculate:
The corresponding inventionannulus flow pressure drop correction factor of discharge capacity 22L/s is recycled under 1100m depth to calculate:
The corresponding inventionannulus flow pressure drop correction factor of discharge capacity 22L/s is recycled under 1080m depth to calculate:
The 1.1625 typing industrial control computer 8 of inventionannulus flow pressure drop correction factor that will be converted into, it is practical convenient for calculating
D=1080 meters of drilling depth, the bottom pressure under the conditions of actual cycle discharge capacity Q=22L/s；
During S6, wellbore construction, the monitored pressure of pressure sensor 9 is lower and holds lower than the specified of density sensor 4
Pressure energy power opens the first automatic flat-plate valve 3 and third automatic flat-plate valve 6 by industrial control computer 8, it is automatically flat to close second
Plate valve 5, the initial opening state of automatic throttle 10 are 50%；
S7, starting slush pump 13 start the cycle over, and annular space returns out monitoring flow Qi=22L/s, density pi=1.18g/cm3, pressure
Power Pi=0.1MPa, the bottom pressure for calculate at analysis current depth 1080m through industrial control computer 8 is Pdi=
12.95MPa；The pore pressure P at 1080m is obtained by way of Lagrangian linear interpolation simultaneouslypi=11.44MPa, leakage
Pressure Pfi=14.83MPa, by PdiWith PpiAnd PfiIt is compared discovery: Ppi<Pdi<Pfi, system only makees monitoring processing, without adjusting
Save the aperture of automatic throttle 10.
The above description is only an embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalent structure or equivalent flow shift made by bright description is applied directly or indirectly in other relevant technology necks
Domain is included within the scope of the present invention.
Claims (5)
1. a kind of return out the simple pressure control drilling system monitored based on annular space, it is characterised in that: including pit shaft (1), drill string (2),
First automatic flat-plate valve (3), the second automatic flat-plate valve (5), third automatic flat-plate valve (6), density sensor (4), flow sensing
Device (7), for pressure control drilling annular pressure analysis and the control industrial control computer (8) of software, pressure sensor (9), from
Dynamic throttle valve (10), injection pipeline (11), annular space return out pipeline (12), slurry tank (14)；The injection pipeline (11) one end connects
In logical drill string (2) upper end, other end insertion slurry tank (14), the bottom end of the drill string (2) is inserted into pit shaft (1), the ring
Sky returns out pipeline (12) one end and is connected with the outlet of pit shaft (1) upper end and in other end insertion slurry tank (14)；The density passes
Sensor (4), flow sensor (7), pressure sensor (9) and automatic throttle (10) return out pipeline (12) along annular space and sequentially set
Set, the density sensor (4), flow sensor (7), pressure sensor (9) and automatic throttle (10) signal output end
It is connected with the signal input part of industrial control computer (8), the first automatic flat-plate valve (3), the second automatic flat-plate valve
(5), third automatic flat-plate valve (6), the signal input part of automatic throttle (10) are defeated with the signal of industrial control computer (8)
Outlet is connected.
A kind of the simple pressure control drilling system monitored is returned out based on annular space 2. according to claim 1, it is characterised in that: institute
It states density sensor (4) and the first automatic flat-plate valve (3), the second automatic flat-plate valve (5), third automatic flat-plate valve (6) passes through pipe
Line is connected to annular space after being connected and returns out on pipeline (12).
A kind of the simple pressure control drilling system monitored is returned out based on annular space 3. according to claim 1, it is characterised in that: institute
State injection pipeline (11), annular space returns out and is connected separately with slush pump (13), automatic throttle (10) on pipeline (12).
4. a kind of return out the simple pressure control drilling method monitored based on annular space, characterized by the following steps:
The simple pressure control drilling system monitored is returned out in S1, foundation based on annular space；
S2, it opens and opens in time drilling process later two, m depth point, the serial number i table of depth point are chosen in Open-Hole Section
Show, vertical depth DiIt indicates, i=1 ... .m, if different depth point DiThe pore pressure P at placepi, different depth DiThe fracture pressure at place
Pfi, drilling fluid density ρd, actual well drilled depth be D, actual well drilled circulation discharge capacity be Q, circulation discharge capacity testing standard point be Qij、
Drill bit is in DiEach circulation discharge capacity testing standard point Q when depthijCorresponding PWD bottom pressure value is Ppij, in different depth point Di
Place, by Qi1→Qi2→….QijDischarge capacity is recycled respectively, and maximum pump discharge is no more than the drilling well largest loop discharge capacity allowed, wherein
J is a numerical value of discharge capacity, records corresponding PWD bottom pressure value P under each circulation discharge capacitypi1→Ppi2→….Ppij；
S3, it is directed to protective casing, calculates bit location in different depth point D by industrial control computer (8)iDifference is sentenced to follow
Ring discharge capacity QijBottom pressure value when being recycled, depth point value and circulation discharge capacity value are identical as in step S2, if often
A circulation discharge capacity testing standard point QijUnder corresponding bottom pressure value Pcij, by Qi1→Qi2→….QijDischarge capacity is recycled respectively,
Wherein j is a numerical value of discharge capacity, records corresponding bottom pressure value P under each circulation discharge capacityci1→Pci2→….Pcij；
Assume that wellbore is the smooth hole of rule when S4, calculating bottom pressure, excludes the shadow of practical irregular borehole and roughness
It rings, therefore software model needs to correct, calculates corresponding inventionannulus flow pressure drop correction factor under different depth point i different displacements:
(Ppi1-Ppi-1,1-0.00981*ρd*Di)/(Pci1-Pci-1,1-0.00981*ρd*Di)→(Ppi2-Ppi-1,2-0.00981*ρd*Di)/
(Pci2-Pci-1,2-0.00981*ρd*Di)→….(Ppij-Ppi-1,j-0.00981*ρd*Di)/(Pcij-Pci-1,j-0.00981*ρd*
Di), wherein Pp0,1,Pp0,2….Pp0,jFor the observed pressure under different displacements at well head, Pc0,1,Pc0,2….Pc0,jFor at well head not
With the calculating pressure under discharge capacity, since well head is depth zero point, so Pp0,1,Pp0,2….Pp0,j, Pc0,1,Pc0,2….Pc0,jIt is impartial
In 0；
S5, production correction factor plate draw the inventionannulus flow pressure drop correction factor song under the conditions of different depth point different displacements
Line, for actual well drilled depth D and actual cycle discharge capacity Q different from above-mentioned drilling depth DiWith circulation discharge capacity QijPoint hours is answered
Inventionannulus flow pressure drop correction factor is obtained by the way of Lagrangian linear interpolation, and the pressure correcting coefficient being converted into is recorded
Enter industrial control computer (8)；
During S6, wellbore construction, when the pressure that pressure sensor (9) is monitored is lower than the specified pressure-bearing of density sensor (4)
When ability, the first automatic flat-plate valve (3) and third automatic flat-plate valve (6) are opened by industrial control computer (8), closes second
Automatic flat-plate valve (5), the initial opening state of automatic throttle (10) are 50%；When the pressure that pressure sensor (9) is monitored
Higher than density sensor (4) specified bearing capacity when, pass through industrial control computer (8) control open the second automatic flat-plate valve
(5), it closes the first automatic flat-plate valve (3) and third automatic flat-plate valve (6), the initial opening state of automatic throttle (10) is
50%；
S7, starting slush pump (13) start the cycle over, if annular space returns out monitoring flow Qi, density pi, pressure Pi, current depth DiUnder
Bottom pressure is Pdi, system monitoring to annular space return out monitoring flow Qi, density pi, pressure PiIt is directly entered Industry Control calculating
Machine (8) carries out calculating analysis, obtains current depth DiUnder bottom pressure Pdi, while with depth point DiThe pore pressure P at placepi
With leakage pressure PfiIt is compared；
If Ppi<Pdi<Pfi, system only makees monitoring processing；
If Ppi>Pdi, system can control automatic throttle (10) and reduce aperture, until Ppi<PdiUntil；
If Pdi>Pfi, system can control automatic throttle (10) and increase aperture, until Pdi<PfiUntil.
A kind of the simple pressure control drilling method monitored is returned out based on annular space 5. according to claim 1, it is characterised in that: institute
It states in step S2, depth point i value includes upper layer casing shoe depth and shaft bottom, and casing shoe depth point i value is 1.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111396025A (en) * | 2020-03-19 | 2020-07-10 | 成都维泰油气能源技术有限公司 | Pressure-controlled drilling intelligent drilling control and drilling abnormity identification and processing method and system |
| CN112228047A (en) * | 2020-11-18 | 2021-01-15 | 中国石油天然气集团有限公司 | Method for judging drilling overflow and leakage |
| CN113047776A (en) * | 2020-12-01 | 2021-06-29 | 中国石油天然气股份有限公司 | Bottom hole pressure control system used in casing running process and casing running method |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201593387U (en) * | 2010-02-03 | 2010-09-29 | 中国石油天然气集团公司 | Drilling annulus pressure precise control system |
| CN101852076A (en) * | 2010-03-31 | 2010-10-06 | 中国石油天然气集团公司 | Underground working condition simulation method for controlled pressure drilling experiment and test |
| CN102828712A (en) * | 2012-09-13 | 2012-12-19 | 中国石油大学(华东) | Double-throttle control slurry pump distributing manifold for applying wellhead back pressure and method |
| CN202755927U (en) * | 2012-06-29 | 2013-02-27 | 中国石油天然气集团公司 | Well drilling device using flow monitoring to control bottom hole pressure |
| CN103015973A (en) * | 2012-12-24 | 2013-04-03 | 中国石油化工股份有限公司 | Simulation device for obtaining drilling parameter in pressure-controllable drilling |
| CN203257353U (en) * | 2013-05-08 | 2013-10-30 | 河北华北石油荣盛机械制造有限公司 | Novel pressure control drilled well system |
| CN103510893A (en) * | 2012-06-29 | 2014-01-15 | 中国石油天然气集团公司 | Well drilling device and method for controlling bottom hole pressure by monitoring flow |
| CN203756087U (en) * | 2014-02-19 | 2014-08-06 | 中国石油化工集团公司 | Pressure-balanced drilling pressure controller |
| CN104100219A (en) * | 2013-04-03 | 2014-10-15 | 中国石油天然气集团公司 | Single-throttling-channel pressure control drilling method and device suitable for high-flow change |
| CN104847287A (en) * | 2014-02-19 | 2015-08-19 | 中国石油化工集团公司 | Balanced pressure drilling pressure control device and method |
| CN207144871U (en) * | 2017-08-23 | 2018-03-27 | 中国石油集团西部钻探工程有限公司 | Controlled pressure drilling exports drilling fluid density real-time monitoring device |
| CN207144931U (en) * | 2017-09-19 | 2018-03-27 | 西南石油大学 | A kind of presser sensor stratum controlled pressure drilling monitoring system |
-
2018
- 2018-11-21 CN CN201811388482.7A patent/CN109736772B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201593387U (en) * | 2010-02-03 | 2010-09-29 | 中国石油天然气集团公司 | Drilling annulus pressure precise control system |
| CN101852076A (en) * | 2010-03-31 | 2010-10-06 | 中国石油天然气集团公司 | Underground working condition simulation method for controlled pressure drilling experiment and test |
| CN202755927U (en) * | 2012-06-29 | 2013-02-27 | 中国石油天然气集团公司 | Well drilling device using flow monitoring to control bottom hole pressure |
| CN103510893A (en) * | 2012-06-29 | 2014-01-15 | 中国石油天然气集团公司 | Well drilling device and method for controlling bottom hole pressure by monitoring flow |
| CN102828712A (en) * | 2012-09-13 | 2012-12-19 | 中国石油大学(华东) | Double-throttle control slurry pump distributing manifold for applying wellhead back pressure and method |
| CN103015973A (en) * | 2012-12-24 | 2013-04-03 | 中国石油化工股份有限公司 | Simulation device for obtaining drilling parameter in pressure-controllable drilling |
| CN104100219A (en) * | 2013-04-03 | 2014-10-15 | 中国石油天然气集团公司 | Single-throttling-channel pressure control drilling method and device suitable for high-flow change |
| CN203257353U (en) * | 2013-05-08 | 2013-10-30 | 河北华北石油荣盛机械制造有限公司 | Novel pressure control drilled well system |
| CN203756087U (en) * | 2014-02-19 | 2014-08-06 | 中国石油化工集团公司 | Pressure-balanced drilling pressure controller |
| CN104847287A (en) * | 2014-02-19 | 2015-08-19 | 中国石油化工集团公司 | Balanced pressure drilling pressure control device and method |
| CN207144871U (en) * | 2017-08-23 | 2018-03-27 | 中国石油集团西部钻探工程有限公司 | Controlled pressure drilling exports drilling fluid density real-time monitoring device |
| CN207144931U (en) * | 2017-09-19 | 2018-03-27 | 西南石油大学 | A kind of presser sensor stratum controlled pressure drilling monitoring system |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111396025A (en) * | 2020-03-19 | 2020-07-10 | 成都维泰油气能源技术有限公司 | Pressure-controlled drilling intelligent drilling control and drilling abnormity identification and processing method and system |
| CN112228047A (en) * | 2020-11-18 | 2021-01-15 | 中国石油天然气集团有限公司 | Method for judging drilling overflow and leakage |
| CN112228047B (en) * | 2020-11-18 | 2024-05-17 | 中国石油天然气集团有限公司 | Drilling overflow leakage judging method |
| CN113047776A (en) * | 2020-12-01 | 2021-06-29 | 中国石油天然气股份有限公司 | Bottom hole pressure control system used in casing running process and casing running method |
| CN113047776B (en) * | 2020-12-01 | 2024-03-01 | 中国石油天然气股份有限公司 | Bottom hole pressure control system and casing running method for casing running process |
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|---|---|
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