CN104695947A - Well kick detecting system and method - Google Patents
Well kick detecting system and method Download PDFInfo
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- CN104695947A CN104695947A CN201310656080.1A CN201310656080A CN104695947A CN 104695947 A CN104695947 A CN 104695947A CN 201310656080 A CN201310656080 A CN 201310656080A CN 104695947 A CN104695947 A CN 104695947A
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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
- E21B47/00—Survey of boreholes or wells
- E21B47/10—Locating fluid leaks, intrusions or movements
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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
- E21B47/00—Survey of boreholes or wells
- E21B47/001—Survey of boreholes or wells for underwater installation
Abstract
The invention relates to a well kick detecting system and a method, and in particular, discloses a drilling system. The drilling system comprises a drilling component and a warning system. The drilling component is connected between a platform and a well mouth for drilling a well hole. The warning system is mounted on the drilling component, and comprises a first detecting device and a second detecting device; the first detecting device and the second detecting device are used for detecting at least one parameter signal related to a return fluid from the well hole and determining if the well kick is generated according to the at least one parameter signal. The invention further discloses a well kick detecting method. The drilling system and the well kick detecting method improve the well kick detecting accuracy and speediness.
Description
Technical field
The present invention relates to the method detecting well kick in drilling system and drilling process.
Background technology
Find from subsurface formations (Subsurface Formation) and open spy hydrocarbon (Hydrocarbon) and carried out the several years.Because land-based capacity of oilwell is limited, open spy hydrocarbon from sub-sea drilled wells and just cause concern.Usually, when drilling offshore field, drill string (Drill String) is arranged rotating drill bit (Drill Bit) for drill well bores under sea bed.Surface platform, as surface platform or drilling ship are controlled drill bit by drill string.Meanwhile, drilling assembly is connected between well head (Wellhead) that surface platform and sea bed are formed.This drilling assembly comprises oil pipe oil-cutting device (Lower Marine Riser Package, LMRP) and preventer (Blowout Preventor, BOP) under standpipe (Riser), low level sea, and drill string carrys out pilot bit to well head place through standpipe.
In drilling process, drill string obtains necessary energy drives drill bit rotational from surface platform.Therebetween, the drilling fluid (or drilling mud) from the fluid tank being arranged on surface platform arrives drill bit by drill string, then by being arranged on the annular space Returning fluid tank between drill string and riser package.Drilling fluid maintains certain hydrostatic pressure (Hydrostatic Pressure) and balances the pressure from the fluid of wellhole and cool drill bit.In addition, drilling fluid mixes to carry it mutually with the material produced in wellhole forming process and processes to sea.
In some cases, the pressure entering the fluid in wellhole from stratum is greater than the pressure of drilling fluid, and it can cause invading less desirable fluid in wellhole, and this can be described as well kick in the industry.Usually detector such as flowmeter survey can be adopted to return drilling fluid flow rates, can estimate that well kick likely occurs when the flow returning drilling fluid is greater than the flow of drilling fluid in from fluid tank.In certain circumstances, well kick there are potential risks, it can cause device damage and cause adverse effect to operating personnel and environment.In order to prevent this catastrophic destruction, be necessary that the density of the shutoff valve or adjustment drilling fluid of closing preventer is to alleviate well kick phenomenon.
But if send false alarm signal when detecting well kick, the shutoff valve of preventer, by unnecessary closedown, repeats to carry out to shutoff valve the life-span that operation can reduce preventer.Therefore, it is desirable to adopt a kind of detection method of well kick more accurately to confirm the generation of well kick, only close the shutoff valve of preventer as necessary again.Further, operating personnel pay close attention to the potential risk that the fluid that undesirably occurs causes may and the monitoring continued on sea away from the inflow of the drilling fluid on sea level and outflow.In some cases, the serious consequence brought due to well kick and well kick may occur in before operating personnel notice drilling fluid change, if go the generation of prevention blowout again when observing well kick, day after the fair.
Therefore, be necessary to provide a kind of system and method for improvement to solve above-mentioned technical problem.
Summary of the invention
In view of above mentioned technical problem, an aspect of of the present present invention is to provide a kind of drilling system, and wherein, this drilling system comprises drilling assembly and warning system.This drilling assembly is connected between platform and well head for drill well bores.This warning system is installed on this drilling assembly, this warning system comprises the first checkout gear and second detection device, this first checkout gear and this second detection device, for detecting at least one parameter signal relevant to the Returning fluid from this wellhole, are confirmed whether well kick occurs according to this at least one parameter signal.
Drilling system as above, wherein, this first checkout gear is for detecting first parameter signal relevant to this Returning fluid and generating alarm signal according to this first parameter signal.The alarm signal that this second detection device generates for responding this first checkout gear, detects second parameter signal relevant to this Returning fluid, and is confirmed whether well kick occurs according to this second parameter signal.
Drilling system as above, wherein, stops at least one drilling operation so that detect this second parameter signal by this second detection device.
Drilling system as above, wherein, this at least one drilling operation comprises drill bit rotational.
Drilling system as above, wherein, this drilling assembly comprises the near-end being connected to this platform and the far-end being connected to this well head, and this first checkout gear and this second detection device are installed between this near-end and this far-end.
Drilling system as above, wherein, this first checkout gear and this second detection device any one to be installed under low level sea on oil pipe oil-cutting device, preventer or riser connecting piece.
Drilling system as above, wherein, when this second detection device detects the mechanical wave signals propagated along Returning fluid, this warning system confirms that well kick occurs.
Drilling system as above, wherein, this second detection device is used for transmit mechanical waves signal to this Returning fluid and from this Returning fluid reception feedback mechanical wave signals.
Drilling system as above, wherein, this second detection device comprises the first detector and the second detector, wherein: this first detector is used for receiving the mechanical wave signals of this Returning fluid at very first time point.This second detector is used for the mechanical wave signals receiving this Returning fluid at the second time point.
Drilling system as above, wherein, by comparing the phase place of this mechanical wave signals of this very first time point and this second time point, frequency or amplitude to confirm that well kick occurs.
Drilling system as above, wherein, this second detection device comprises the first detector and the second detector, wherein: this first detector is used for transmit mechanical waves signal to this Returning fluid.This second detector is used for receiving this mechanical wave signals from this Returning fluid.
Another aspect of the invention is to provide a kind of method for detecting well kick, and wherein, the method at least comprises the steps: to detect first parameter signal relevant to Returning fluid by the first checkout gear.Second parameter signal relevant to this Returning fluid is detected by second detection device.At least occur based on this first and second parameter signal report well kick.
Method as above, wherein, the method comprises the generation alarm signal when this first parameter signal meets the first standard, the step of this second parameter signal of examinations after producing this alarm signal.
Method as above, wherein, the method comprises: when after this alarm signal of generation, stop drilling operation so that detect this second parameter signal.Start this second detection device to detect the mechanical wave signals relevant to this Returning fluid.
Method as above, wherein, the mechanical wave signals that the method comprises this Returning fluid that basis is detected by this second detection device confirms that well kick occurs.
Method as above, wherein, the method comprise according to by the first detector in this second detection device and the second detector at the comparative result of the mechanical wave signals of this Returning fluid that the very first time puts and the second time point detects respectively to confirm that well kick occurs.
Method as above, wherein, the method comprises: the first detector transmit mechanical waves signal in this second detection device is to this Returning fluid.When the second detector in this second detection device detects feedback mechanical wave signals from this Returning fluid, confirm that well kick occurs.
Another aspect of the invention is to provide a kind of offshore drilling system, and this offshore drilling system comprises offshore platform, drilling assembly, the first checkout gear, second detection device and processor.This offshore platform is placed in sea.This drilling assembly is connected between this offshore platform and well head, for drill well bores.This first checkout gear is for detecting the first parameter signal and producing alarm signal according to this first parameter signal.This second detection device is installed on this drilling assembly, produces to stop at least one drilling operation, and detect the second parameter signal for responding this alarm signal.This processor is placed on this offshore platform or this drilling assembly, occurs the common analysis confirmation well kick of this first parameter signal and this second parameter signal for passing through.
Drilling system provided by the invention and well kick detection method are compared with traditional method, by adopting the collaborative work of the first checkout gear and second detection device to detect at least one signal thus to reach the object reaffirming whether well kick occurs, and then the accuracy of well kick detection can be improved.Simultaneously, this first checkout gear and this second detection device are installed on the drilling assembly being connected to platform and well head, because distance sea bed distance is nearer, more quick to the determination and analysis of signal, thus response speed can be accelerated to alleviate or to avoid the harm caused of well kick as early as possible.
Accompanying drawing explanation
Be described for embodiments of the present invention in conjunction with the drawings, the present invention may be better understood, in the accompanying drawings:
Figure 1 shows that a kind of embodiment schematic diagram of drilling system.
Figure 2 shows that a kind of embodiment schematic diagram of the warning system be installed on drilling system.
Figure 3 shows that the another kind of embodiment schematic diagram of the warning system be installed on drilling system.
Figure 4 shows that the another kind of embodiment schematic diagram of the warning system be installed on drilling system.
Figure 5 shows that the another kind of embodiment schematic diagram of the warning system be installed on drilling system.
Figure 6 shows that the another kind of embodiment schematic diagram of the warning system be installed on drilling system.
Fig. 7 be in drilling system as shown in Figure 5 drilling assembly along a kind of schematic cross-section of A-A.
Fig. 8 be in drilling system as shown in Figure 5 drilling assembly along the another kind of schematic cross-section of A-A.
Fig. 9 is the control block diagram of a kind of embodiment detecting well kick.And
Figure 10 is the flow chart of a kind of embodiment detecting well kick.
Detailed description of the invention
Below will describe detailed description of the invention of the present utility model, and it is pointed out that in the specific descriptions process of these embodiments, in order to carry out brief and concise description, this manual can not all do detailed description to all features of the embodiment of reality.Should be understandable that; in the actual implementation process of any one embodiment; as in the process of any one object of construction production or design object; in order to realize the objectives of developer; in order to meet that system is correlated with or that business is relevant restriction; usually can make various concrete decision-making, and this also can change to another kind of embodiment from a kind of embodiment.In addition, it will also be appreciated that, although effort done in this development process may be complicated and tediously long, but for those of ordinary skill in the art relevant to content disclosed in the utility model, some designs that the basis of the technology contents of disclosure exposure is carried out, manufacture or production etc. changes just conventional technological means, not should be understood to content of the present disclosure insufficient.
Unless otherwise defined, the technical term used in claims and manual or scientific terminology should be the ordinary meaning that the personage that has general technical ability in the utility model art understands." first ", " second " that use in the utility model patent application specification and claims and similar word do not represent any order, quantity or importance, and are only used to distinguish different ingredients.The similar word such as " one " or " one " does not represent that quantity limits, but represents to there is at least one." comprise " or the similar word such as " comprising " mean to appear at " comprising " or " comprising " before element or object contain the element or object and equivalent element thereof that appear at " comprising " or " comprising " presented hereinafter, do not get rid of other elements or object." setting ", " connection " or " being connected " etc. similar word be not defined in physics or the connection of machinery, be also not limited to direct or indirectly connect.
Please refer to Fig. 1, is the schematic diagram of an embodiment of drilling system 100 of the present invention.In embodiments of the present invention, drilling system 100 can be used to drill well bores to open spy hydrocarbon.In non-restrictive example, wellhole comprises land wellhole (Onshore Well) and offshore wellhole (Offshore Well).In one example, drilling system 100 is used for out visiting offshore wellhole.
As shown in Figure 1, drilling system 100 drilling assembly 103 that generally includes the platform 101 on sea and be connected between this platform 101 and well head 105.This platform 101 can comprise probing ship or marine pylon.
This drilling assembly 103 comprises the far-end 104 that the near-end 102 being connected to this platform 101 is connected to this well head 105.More specifically, this drilling assembly 103 is connected to the bottom of this platform 101 and is immersed in seawater at least partly.This drilling assembly 103 is for drill well bores 132.In some embodiments, this drilling assembly 103 comprises drill string 110, drill bit 114, standpipe 111, preventer (Blowout Preventor, BOP) 115, oil pipe oil-cutting device (Lower Marine Riser Package, LMRP) 113 and other assemblies do not illustrated under low level sea.
In one embodiment, this drill string 110 comprises drilling rod (Drill Pipe), and it comprises multiple end to end pipeline with certain length.This drill bit 114 is arranged on the end of this drill string 110.This drill string 110 can be used to drive this drill bit 114 to rotate to carry out drilling and then formed this wellhole 132 in sea bed 107 times formation.
This standpipe 111 extends to this well head 105 from this platform 101 is substantially vertical.This standpipe 111 can comprise multiple standpipe section, and the plurality of standpipe section is linked together by multiple riser connecting piece 1111.This drill string 110 can be arranged in this standpipe 111 and along the length direction of this standpipe 111 and extend in this standpipe 111.
In drilling process, this drill string 110 drives this drill bit 114 to rotate and by this drill string 110, this drill bit 114 is connected to this platform 101.Simultaneously, drilling fluid 112 from the fluid tank (not shown) of this platform 101 arrives this drill bit 114 by this drill string 110, then returns platform 101 by the annular space 122 be formed between this drill string 110 and this standpipe 111 inner surface with the form returning drilling fluid.
This drilling fluid 112(drilling mud) maintain certain hydrostatic pressing (Hydrostatic Pressure) with the pressure of layer fluid evenly, cool this drill bit 114, the mixtures of materials that drilling process produces can be carried simultaneously.The rock debris that this mixtures of materials is formed when can comprise this wellhole 132 of probing.This drilling fluid 112 injected from this platform 101 comprises water, oil and/or other drilling fluid compositions.
This returns drilling fluid at least can comprise the mixtures of materials produced in the process of drilling fluid 112 and this wellhole 132 of probing.This platform 101 processing returning drilling fluid, such as this being returned to drilling fluid and filters with the operation of the materials such as filtering rock debris wherein, the drilling fluid that returns after process can be used as this drilling fluid 112 and re-starts circulation.
As mentioned above, in certain application, the pressure entering the fluid in this wellhole 132 from stratum can be greater than the pressure of this drilling fluid 112, and this can cause the generation of well kick (Kick).When well kick occurs, formation fluid 117, typically comprises gas mixture, together to enter in this wellhole 132 in company with returning drilling fluid thus to produce larger Returning fluid 116.If it is improper to control, this Returning fluid 116 from this wellhole 132 flows and erupts from this drilling assembly 103 after this platform 101 of arrival and go out and then cause blowout (Blowout) in this annular space 122.Terminology used here " Returning fluid " can refer to and return drilling fluid towards this of this platform 101 flowing in this annular space 122, and this returns the mixture of drilling fluid and this formation fluid 117, or this formation fluid 117.
As shown in Figure 1, under this low level sea, oil pipe oil-cutting device 113 is placed in the end of this standpipe 111 and adjacent with this preventer 115.Under this low level sea, oil pipe oil-cutting device 113 comprises connector 127 and is connected to this standpipe 111 for by oil pipe oil-cutting device 113 under this low level sea.Adopt oil pipe oil-cutting device 113 under this low level sea, by being separated this connector 127, this platform 101 can be separated with this wellhole 132.
This preventer 115 to be placed under this low level sea between oil pipe oil-cutting device 113 and this well head 105.This preventer 115 comprises one or more shutoff valve 125 and is stacked for the generation of detection well kick and/or seals this well head 105.When suspection has well kick to occur, in some cases, the shutoff valve of this preventer 115 is closed to seal this annular space 122 thus to stop this Returning fluid 116 to be upwards delivered to this platform 101 by part.Like this, by the circulation of this drilling fluid 112 in this standpipe 111, this hydrostatic pressing can recapture balance.In some cases, by closing the shutoff valve of this preventer 115 completely to seal this well head 105 completely, namely the passage of this drilling fluid 112 and the passage of this Returning fluid 116 are all cut off, and this wellhole 132 is completely sealed.
For extending the life-span of this preventer 115 and/or preventing from carrying out to this preventer 115 massive losses that maloperation brings because of false alarm, be necessary the generation confirming well kick before this preventer 115 is operated.Therefore, desirable to provide the loss that a kind of method detecting well kick is more accurately brought to alleviate or to avoid the harm caused of well kick or false alarm.
In one embodiment, the present invention proposes a kind of warning system 129 for the generation accurately detecting well kick.As shown in Figure 1, this warning system 129 comprises the first checkout gear 109 between this near-end 102 and this far-end 104 and second detection device 119 that are installed on this drilling assembly 103.This warning system 129 is for detecting at least one parameter signal relevant to this Returning fluid 116 and based on this at least one parameter signal to confirm the generation of well kick.More specifically, this first checkout gear 109 is carrying out or imminent well kick for identifying, this second detection device 119, for confirming the generation of well kick, operates the loss alleviating or avoid the harm caused of well kick or false alarm to bring after confirming well kick generation to this preventer 115.Below with reference to Fig. 2 to Fig. 6, this warning system 129 is further expalined and is illustrated.
Please refer to Fig. 2, for being installed on a kind of embodiment schematic diagram of the warning system 229 on this drilling system 100.In the present embodiment, this first checkout gear 109 is placed under this low level sea on oil pipe oil-cutting device 113, and this second detection device 119 can be placed on this preventer 115.In some embodiments, any one in this first checkout gear 109 and this second detection device 119 can be placed in any part of oil pipe oil-cutting device 113, this preventer 115 or this standpipe 111 under this low level sea as on this riser connecting piece 1111.In other embodiments, this first checkout gear 109 can be placed on this platform 101, and this second detection device 109 can be placed in any part of oil pipe oil-cutting device 113, this preventer 115 or this standpipe 111 under this low level sea as on this riser connecting piece 1111.
This first checkout gear 109 is for detecting the density of the first parameter signal as this Returning fluid of this Returning fluid 116, SVEL, flow velocity and/or pressure etc. to be further analyzed.In some embodiments, this warning system 129 comprises processor further, and in some embodiments, this processor can be placed on this platform 101.In some embodiments, this processor can be placed in this drilling system 100 other assemblies on as on this drilling assembly 103.The first parameter signal that this processor is used for detecting according to this produces alarm signal.
This alarm signal shows that well kick is carrying out or is being about to occur.Such as, when the flow of this Returning fluid 116 detected is much larger than the flow preset value of this drilling fluid 112, this alarm signal is produced.In some embodiments, the change by monitoring the fluid flow of this fluid tank can produce this alarm signal.More specifically, when the fluid level of this fluid tank rises rapidly, the flow namely flowing into this Returning fluid 116 of this fluid tank, much larger than when flowing out the flow of this drilling fluid 112 of this fluid tank, produces this alarm signal.
This second detection device 119 is for detecting the second parameter signal of this Returning fluid 116 and confirming the generation of well kick and then alleviate or avoid the harm caused of well kick.In some embodiments, after producing this alarm signal, this second detection device 119 is activated and carries out testing.In other embodiments, this first checkout gear 109 and this second detection device 119 can work to carry out Real-Time Monitoring to confirm the generation of well kick simultaneously.
In the present embodiment, this second detection device 119 comprises detector 1191 for detecting the mechanical wave signals 131 of this Returning fluid 116 to confirm the generation of well kick.This mechanical wave signals 131 is produced by the mechanical oscillation of this formation fluid 117 and propagates in this Returning fluid 116.
More specifically, in one embodiment, after producing alarm signal according to this first signal parameter, stop at least one drilling operation to provide relatively quietly environment.This drilling operation can comprise the rotation of this drill bit 114 and/or inject this drilling fluid 112.Under this relatively quietly environment, this mechanical wave signals 131 can be detected by this detector 1191 via this Returning fluid 116.In other embodiments, according to this first signal parameter produce alarm signal without the need to stopping drilling operation to detect this mechanical wave new number 131.The type of this mechanical wave signals 131 includes but not limited to compression wave and acoustic signals.
In some embodiments, this processor can be analyzed the phase place of this mechanical wave signals 131, amplitude, frequency or its combination.Such as, the mechanical wave signals 131 of this detection can compare with the default mechanical wave signals of this formation fluid 117, and in one embodiment, this default mechanical wave signals can obtain and be set in advance in the memory of this processor from the well kick of generation before.When the mechanical wave signals 131 of this detection and the default mechanical wave signals of this formation fluid 117 match in phase place, amplitude and/or frequency, this warning system 229 can determine that well kick occurs.Again such as, the real-time detector data of this mechanical wave signals 131 can compare with its historical data, and when the amplitude of the real-time detector data of this mechanical wave signals 131 continues to increase, this warning system 229 can determine that well kick occurs.
Otherwise, in one embodiment, if the phase place of this mechanical wave signals 131 and this default mechanical wave signals, amplitude, frequency complete different time, namely this mechanical wave signals 131 is not that this formation fluid 117 produces, and this warning system 229 will be confirmed to be false alarm.
Please refer to Fig. 3, for being installed on a kind of embodiment schematic diagram of the warning system 329 on drilling system 100.Compared with this warning system 229 as shown in Figure 2, analogously, this warning system 329 comprises this first checkout gear 109 and its working method is identical with its working method in as figure as described in 2, therefore, does not here repeat this first checkout gear 109.
Analogously, detector 1192 is used as this second detection device 119.But the passive type mechanical wave be different from as described in Figure 2 detects, this detector 1192 receives feedback mechanical wave signals 135 after in active transmitter tool ripple signal 133 to this Returning fluid 116 from this Returning fluid 116.
More specifically, invading in this Returning fluid 116 when formation fluid 117 and exist with the form of inner formation fluid 1173, this internally will form interface 1171 in layer fluid 1173 region.Therefore, after the mechanical wave signals 133 of this detector 1192 transmitting arrives this interface 1171, this mechanical wave signals 133 is partially reflected and is detected by this detector 1192 as feedback mechanical wave signals 135.
In some embodiments, this processor can be analyzed the phase place of this feedback mechanical wave signals 135, amplitude, frequency or its combination.In some embodiments, this feedback mechanical wave signals 135 and this transmit mechanical waves signal 133 are compared, when the amplitude of this feedback mechanical wave signals 135 reduces and treated device analysis judges that this amplitude reduces is caused by the interaction of this transmit mechanical waves signal 133 and this internally layer fluid 1173, this warning system 329 can determine that well kick occurs.
Otherwise, in one embodiment, if this detector 1192 do not detect any feedback mechanical wave signals 135 or via processor analyze this feedback mechanical wave signals 135 be not this internally layer fluid 1173 cause, this warning system 329 will be confirmed to be false alarm.
Please refer to Fig. 4, for being installed on a kind of embodiment schematic diagram of the warning system 429 on drilling system 100.Compared with this warning system 229 as shown in Figure 2, analogously, this warning system 429 comprises this first checkout gear 109 and its working method is identical with its working method in as figure as described in 2, therefore, does not here repeat this first checkout gear 109.
But in embodiment as shown in Figure 4, this second detection device 119 comprises the first detector 1193 and the second detector 1195.This first detector 1193 and this second detector 1195 are placed in the differing heights of this drilling assembly 103.In some embodiments, this first detector 1193 and this second detector 1195 flow through the direction at right angle setting of this annular space 122 along this Returning fluid 116.In the present embodiment, under this first detector 1193 and this second detector 1195 are placed in this low level sea respectively, oil pipe oil-cutting device 113 is with on this preventer 115.In other embodiments, any one in this first detector 1193 and this second detector 1195 can be placed on oil pipe oil-cutting device 113 under this low level sea, this preventer 115 or this standpipe 111 as on this riser connecting piece 1111.
After producing this alarm signal according to the first parameter signal of this detection, this first detector 1193 and this second detector 1195 are respectively used to detect the mechanical wave signals 137 relevant to this Returning fluid 116 in different time points.More specifically, this mechanical wave signals 137 produced by this formation fluid 117 is propagated along this Returning fluid 116 direction.This mechanical wave signals 137 arrives this first detector 1193 at very first time point, arrives this second detector 1195 at the second time point.
If this formation fluid 117 to invade in this Returning fluid 116 and after existing with the form of inner formation fluid 1173, this mechanical wave signals 137 can partial penetration this internally layer fluid 1173 and the energy of this mechanical wave signals 137 can be decayed.Namely, when this mechanical wave signals 137 arrives this second detector 1195 at this second time point, this first detector 1193 is different with the amplitude of this mechanical wave signals 137 that this second detector 1195 detects.
In some embodiments, in this processor, this mechanical wave signals 137 is analyzed in the phase place of the one the second time points and frequency, such as, when both are phase place and/or frequency are different and when showing that this is not both that internally layer fluid 1173 causes by this via processor analysis, this warning system 429 can determine that well kick occurs.
Otherwise in one embodiment, this mechanical wave signals 137 is identical with frequency in the phase place of the one the second time points, and this warning system 429 will be confirmed to be false alarm.
Please refer to Fig. 5, for being installed on a kind of embodiment schematic diagram of the warning system 529 on drilling system 100.Compared with this warning system 229 as shown in Figure 2, analogously, this warning system 529 comprises this first checkout gear 109 and its working method is identical with its working method in as figure as described in 2, therefore, does not here repeat this first checkout gear 109.
But in embodiment as shown in Figure 5, this second detection device 119 comprises the first detector 1197 and the second detector 1199.In some embodiments, as shown in Figure 5, this first detector 1197 and this second detector 1199 are placed in the phase co-altitude of this drilling assembly 103.In other embodiments, as shown in Figure 6, this first detector 1197 and this second detector 1199 are placed in the differing heights of this drilling assembly 103.
When the first detector 1197 and this second detector 1199 are placed in the phase co-altitude of this drilling assembly 103, in some embodiments, between this first detector 1197 and this second detector 1199 along this drilling assembly 103(such as, preventer 115) circular arc distance 177 equal as shown in Figure 7 semi arch.One of them detector is used for transmit mechanical waves signal 138, and such as, this first detector 1197 is for launching this mechanical wave signals 138 to this Returning fluid 116.Then this mechanical wave signals 138 passes this Returning fluid 116 and arrives this second detector 1199.
In some embodiments, for preventing this drill string 110 from hindering this mechanical wave signals 138 to arrive this second detector 1199, the circular arc distance 188 along this drilling assembly 103 between this first detector 1197 and this second detector 1199 is less than semi arch as shown in Figure 8.This mechanical wave signals 138 can pass this Returning fluid 116 and be detected by this second detector 1199.
Please referring again to Fig. 5, after producing this alarm signal according to the first parameter signal of this detection, this first detector 1197 is for launching this mechanical wave signals 138 to this Returning fluid 116.This second detector 1199 is for receiving this mechanical wave signals 138.
More specifically, if this formation fluid 117 to invade in this Returning fluid 116 and after existing with the form of inner formation fluid 1173, this mechanical wave signals 138 can partial penetration this internally layer fluid 1173 and the energy of this mechanical wave signals 138 can be decayed.Namely, when this mechanical wave signals 138 arrives this second detector 1199, the amplitude that this mechanical wave signals 138 received with this second detector 1199 launched by this first detector 1197 is different.
In some embodiments, phase place and the frequency of this mechanical wave signals 138 that this processor is launched this first detector 1197 and this second detector 1199 detects are analyzed, such as, if when both phase place and/or frequency different and via this processor analysis draw this be not both due to this internally layer fluid 1173 cause, this warning system 529 can determine that well kick occurs.
Otherwise in one embodiment, the phase place of this mechanical wave signals 138 that this mechanical wave signals 138 that this first detector 1197 is launched detects with this second detector is identical with frequency, and this warning system 529 will be confirmed to be false alarm.
In as can be seen from Fig. 1 to Fig. 8, due to this first checkout gear 109 and this second detection device 119 comparatively near apart from this formation fluid 117, this warning system 129 is conducive to detecting fast first parameter signal and the second parameter signal and responds with the harm caused alleviating or avoid well kick fast.
Please refer to Fig. 9, is the control block diagram adopting warning system 129 to detect a kind of embodiment of well kick.As shown in Figure 9, this warning system 129 comprises processor 910.This processor 910 comprises the first analytic unit 905 and the second analytic unit 907, and this processor can the mode that combines of software, hardware or software and hardware be implemented.
This first analytic unit 905 is analyzed for the first parameter signal 901 detected this first checkout gear 109.This first detection signal 901 can comprise the parameter signal relevant to this Returning fluid as the density of this Returning fluid, flow velocity or pressure.Then in this first analytic unit 905, comparison procedure is processed.In some embodiments, the flow of this Returning fluid is used as this first parameter signal 901, and the flow of this drilling fluid is used as this first parameter signal preset value 902.By observing fluid tank, when flowing into the flow of this Returning fluid of this fluid tank much larger than when flowing out the flow 902 of drilling fluid of this fluid tank, produce this alarm signal 911.
In some embodiments, when after this alarm signal 911 of generation, stop at least one drilling operation to provide relatively quietly environment.This alarm signal 911 is for starting this second detection device 119.This second detection device 119 is for detecting the second parameter signal 903 and being delivered to this second analytic unit 907.This second parameter signal 903 can comprise the mechanical wave signals of the parameter signal relevant to this Returning fluid as this formation fluid.After the phase place to this mechanical wave signals 903, amplitude and/or frequency are analyzed, this warning system 129 can determine that the generation of this well kick is to carry out alleviating or stoping the operation of well kick.
In some embodiments, this second parameter signal 903 can compare with the second parameter signal preset value 904.Such as, as shown in Figure 5 or Figure 6, this mechanical wave signals 138 that this first detector 1197 is launched can be used as this second parameter signal preset value 904, and this mechanical wave signals 138 that this second detector 1199 detects is used as this second parameter signal 903.When this mechanical wave signals 138 that this second detector 1199 detects and this amplitude different with amplitude of this mechanical wave signals 138 that this first detector 1197 is launched different via analyze be this internally layer fluid 1173 produces time, generation well kick signal 913
In some embodiments, after analyzing this first parameter signal 901 and this second parameter signal 903, this processor 910 is for confirming the generation of well kick simultaneously.Namely this first checkout gear 109 and this second detection device 119 work simultaneously.More specifically, when this first analytic unit 905 and this second analytic unit 907 produce this alarm signal 911 and this well kick signal 913 respectively simultaneously, this warning system 129 can determine that the generation of this well kick is to carry out alleviating or stoping the operation of well kick.
Please refer to Figure 10, for detecting the flow chart of a kind of embodiment of well kick.In step 1001, the first checkout gear is for detecting first parameter relevant to Returning fluid, and wherein, this Returning fluid flows through the annular space that drilling assembly defines.This first parameter signal can comprise the parameter signal relevant to this Returning fluid as the density of this Returning fluid, flow velocity or pressure.Produce alarm signal when the first parameter signal of this detection meets the first standard, this alarm signal shows that well kick is carrying out or is being about to occur.Such as, the fluid level of this fluid tank rises rapidly, when the flow namely flowing into this this Returning fluid of fluid tank is much larger than the flow of the drilling fluid of this this fluid tank of outflow, produces this alarm signal.
In step 1003, second detection device is for detecting this second parameter signal relevant to this Returning fluid.In some embodiments, after producing this alarm signal, the process of this second parameter signal of examinations.Usually, for ease of detecting this second parameter signal, first stop at least one drilling operation to provide relatively quietly environment, then under this quiet environment, this second detection device is activated to detect the mechanical wave signals relevant to this Returning fluid.In other embodiments, this second detection device and this first checkout gear can carry out Real-Time Monitoring to this first parameter signal and this second parameter signal simultaneously.
In step 1005, at least based on this first signal parameter and this second parameter signal to report the generation of well kick.By various ways, undertaken of well kick is confirmed.
In some embodiments, the mechanical wave signals that base area layer fluid mechanical oscillation produce, adopts the detector in this second detection device to confirm the generation of well kick.In some embodiments, according to the comparative result of mechanical wave signals of the formation fluid at very first time point and the detection of the second time point to confirm the generation of well kick.In some embodiments, the first detector in this second detection device is used for transmit mechanical waves signal to this Returning fluid, when the second detector in this second detection device detects the feedback mechanical wave signals produced by the acting in conjunction of the internally layer fluid in this transmit mechanical waves signal and this Returning fluid of inflow, confirm that well kick occurs.Describe in detail in the embodiment of concrete grammar above, therefore here repeat no more.
Although describe the present invention in conjunction with specific embodiment, those skilled in the art will appreciate that and can make many amendments and modification to the present invention.Therefore, recognize, the intention of claims is to be encompassed in all such modifications in true spirit of the present invention and scope and modification.
Claims (18)
1. a drilling system, is characterized in that: this drilling system comprises:
Be connected to the drilling assembly between platform and well head, for drill well bores; And
Be installed on the warning system on this drilling assembly, this warning system comprises the first checkout gear and second detection device, this first checkout gear and this second detection device, for detecting at least one parameter signal relevant to the Returning fluid from this wellhole, are confirmed whether well kick occurs according to this at least one parameter signal.
2. drilling system as claimed in claim 1, wherein,
This first checkout gear is for detecting first parameter signal relevant to this Returning fluid and generating alarm signal according to this first parameter signal;
The alarm signal that this second detection device generates for responding this first checkout gear, detects second parameter signal relevant to this Returning fluid, and is confirmed whether well kick occurs according to this second parameter signal.
3. drilling system as claimed in claim 2, wherein, stops at least one drilling operation so that detect this second parameter signal by this second detection device.
4. drilling system as claimed in claim 3, wherein, this at least one drilling operation comprises drill bit rotational.
5. drilling system as claimed in claim 1, wherein, this drilling assembly comprises the near-end being connected to this platform and the far-end being connected to this well head, and this first checkout gear and this second detection device are installed between this near-end and this far-end.
6. drilling system as claimed in claim 5, wherein, this first checkout gear and this second detection device any one to be installed under low level sea on oil pipe oil-cutting device, preventer or riser connecting piece.
7. drilling system as claimed in claim 1, wherein, when this second detection device detects the mechanical wave signals propagated along Returning fluid, this warning system confirms that well kick occurs.
8. drilling system as claimed in claim 1, wherein, this second detection device is used for transmit mechanical waves signal to this Returning fluid and from this Returning fluid reception feedback mechanical wave signals.
9. drilling system as claimed in claim 1, wherein, this second detection device comprises the first detector and the second detector, wherein:
This first detector is used for receiving the mechanical wave signals of this Returning fluid at very first time point; And
This second detector is used for the mechanical wave signals receiving this Returning fluid at the second time point.
10. drilling system as claimed in claim 9, wherein, by comparing the phase place of this mechanical wave signals of this very first time point and this second time point, frequency or amplitude to confirm that well kick occurs.
11. drilling systems as claimed in claim 1, wherein, this second detection device comprises the first detector and the second detector, wherein:
This first detector is used for transmit mechanical waves signal to this Returning fluid; And
This second detector is used for receiving this mechanical wave signals from this Returning fluid.
12. 1 kinds, for detecting the method for well kick, is characterized in that, the method at least comprises the steps:
First parameter signal relevant to Returning fluid is detected by the first checkout gear;
Second parameter signal relevant to this Returning fluid is detected by second detection device; And
At least occur based on this first and second parameter signal report well kick.
13. methods as claimed in claim 12, wherein, the method comprises the generation alarm signal when this first parameter signal meets the first standard, the step of this second parameter signal of examinations after producing this alarm signal.
14. methods as claimed in claim 13, wherein, the method comprises:
When after this alarm signal of generation, stop drilling operation so that detect this second parameter signal; And
Start this second detection device to detect the mechanical wave signals relevant to this Returning fluid.
15. methods as claimed in claim 12, wherein, the mechanical wave signals that the method comprises this Returning fluid that basis is detected by this second detection device confirms that well kick occurs.
16. methods as claimed in claim 12, wherein, the method comprise according to by the first detector in this second detection device and the second detector at the comparative result of the mechanical wave signals of this Returning fluid that the very first time puts and the second time point detects respectively to confirm that well kick occurs.
17. methods as claimed in claim 12, wherein, the method comprises:
The first detector transmit mechanical waves signal in this second detection device is to this Returning fluid; And
When the second detector in this second detection device detects feedback mechanical wave signals from this Returning fluid, confirm that well kick occurs.
18. 1 kinds of offshore drilling systems, is characterized in that: this offshore drilling system comprises:
Be placed in the offshore platform on sea;
Drilling assembly, this drilling assembly is connected between this offshore platform and well head, for drill well bores;
First checkout gear, for detection first parameter signal and according to this first parameter signal generation alarm signal;
Second detection device, is installed on this drilling assembly, produces to stop at least one drilling operation, and detect the second parameter signal for responding this alarm signal; And
Being placed in the processor on this offshore platform or this drilling assembly, for passing through, the common analysis confirmation well kick of this first parameter signal and this second parameter signal being occurred.
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| CN201310656080.1A CN104695947A (en) | 2013-12-06 | 2013-12-06 | Well kick detecting system and method |
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| CN105735976A (en) * | 2014-12-10 | 2016-07-06 | 通用电气公司 | Drilling system and well kick recognizing method |
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