CN206233918U - Oil/gas Well cement sheath sealing integrity test device - Google Patents
Oil/gas Well cement sheath sealing integrity test device Download PDFInfo
- Publication number
- CN206233918U CN206233918U CN201621206382.4U CN201621206382U CN206233918U CN 206233918 U CN206233918 U CN 206233918U CN 201621206382 U CN201621206382 U CN 201621206382U CN 206233918 U CN206233918 U CN 206233918U
- Authority
- CN
- China
- Prior art keywords
- pressure
- stop valve
- cement sheath
- branch line
- kettle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The utility model is related to a kind of Oil/gas Well cement sheath sealing integrity test device, simulation wellbore hole including autoclave pressure and inside autoclave pressure, test device also includes control pressurer system, temperature control system, channelling detecting system, strain measurement system and mud cake simulation system；Simulation wellbore hole includes sleeve pipe and the rock core positioned at sleeve pipe periphery, and annular gap is formed between sleeve pipe and rock core, and cement sheath is formed in annular gap；The upper and lower ends of sleeve pipe and rock core are respectively equipped with upper end cover and bottom end cover.The utility model can be realized to cement sheath institute's bearing temperature under the difference working condition of underground and the true simulation from sleeve pipe, complex formation load, processing range covers Oil/gas Well and bores completion phase cementing well, and pressure testing, pilot production in production process, circulation note are adopted and the transformation operating mode such as pressure break.The utility model can be by changing the factors such as cement thickness, mud cake property, curing temperature, to evaluate its affecting laws to cement sheath sealing integrity.
Description
Technical field
The utility model belongs to petrol resources exploitation field, and in particular to water under the conditions of can simulating underground working to one kind
Sleeve pipe, complex formation load that mud ring is born, and the device of sealing integrity test is carried out to cement sheath.
Background technology
In each stage in Oil/gas Well life cycle, the control to fluid in pit shaft and stratum is all top priority.Such as
There is uncontrolled flowing in fruit fluid, Oil/gas Well does not just possess integrality in physics and functionally, it is possible to cause serious
, even catastrophic consequence.Cement sheath as oil gas well shaft important component, its major function is exactly to prevent
Formation fluid channelling during drilling well, production and transformation, and effectively fixed and supporting sleeve.In recent years, as exploration is opened
Hair process is carried out in a deep going way, and most oil field developments enter the storey increase design measures such as middle and later periods, fluid injection, acidifying, pressure break and obtain
Extensive use, increasing well but occurs in that the problem of the cement sheath sealing integrities such as annular space with pressure, crossflow failure, special
It is not that the annular pressure anomaly in production process is very universal, and sealing property is complete as cement sheath for high-pressure gas well
How the direct Measure Indexes of whole property, realize evaluating most important to its accurate quantitative analysis.Therefore, cement sheath sealing integrity is carried out
Evaluation study, the extension of determination and life cycle to Oil/gas Well production measure is significant.
At present, for the method for testing of cement sheath sealing integrity, logger, such as sound wave are mainly utilized in Oil Field
Well logging (CBL), variable density (VDL) etc. are judged well cementation interface, and also having directly interlayer alter using preforation tunnel logical
Aptitude tests, but this test may pressure break or block stratum, or even to well cementation interface damage.And in laboratory
Tester mainly has with method：Shearing cementing strength evaluating apparatus, cementing waterpower and permeability values device, Behavior of Hardened Cement Paste resistance to compression
Strength detection method, well cementation second interface packing ability simulation evaluation device and cementing concrete ring mechanical integrity test device etc.,
Above tester majority is that only a few instrument is with cement with interface shear strength and Behavior of Hardened Cement Paste compression strength as evaluation index
The actual sealing of ring and sealing are used as evaluation index.Even so, due to the limitation of experiment condition, above method is to reality
Underground working has carried out substantial amounts of simplification, or is directly reduced to equivalent Physical Experiment, leads to not simulation cement sheath in well
Under actual forced status.Therefore, currently either laboratory experiment test, or field engineering application is difficult to be realized to underground work
Cement sheath sealing integrity carries out accurate evaluation under the conditions of condition.
Chinese patent CN 104153760A Oil/gas Wells cement sheath sealing characteristics simulating test devices and experimental technique, it is open
A kind of Oil/gas Well cement sheath sealing characteristics simulating test device, including kettle, upper kettle cover, lower kettle cover, heating mantle, booster pump,
Pressure release pump and liquid measure and tolerance recorder and it is connected to for controlling and testing a plurality of pipe such as confined pressure, pressure release and casing pressure
Road, but from the point of view of this seminar practical operation situation, the sealing property of the present apparatus is not good enough, is primarily due to coordinate different size
Attachment structure can not bear too big pressure difference between pressing plate that sleeve pipe is used and upper kettle cover, therefore can only realize to a certain extent pre-
Set the goal.Furthermore, this device is only capable of realizing the measure of cement sheath loading and the influence of cement sheath sealing characteristics, and the water under real well
Mud ring needs to bear multi-party pressure, the characteristic of cement sheath sealing is only determined by being loaded to cement sheath, it is impossible to meet and determine comprehensively
The need for.
Utility model content
According to above-mentioned weak point, the purpose of this utility model is to provide one kind and can simulate cement under the conditions of underground working
Sleeve pipe, complex formation load that ring is born, and the device of sealing integrity test is carried out to cement sheath.
To achieve the above object, the technical solution of the utility model is：A kind of Oil/gas Well cement sheath sealing integrity is surveyed
Trial assembly is put, including autoclave pressure and the simulation wellbore hole inside autoclave pressure, and test device also includes control pressurer system, temperature control
System processed, channelling detecting system, strain measurement system and mud cake simulation system；
Simulation wellbore hole includes sleeve pipe and the rock core positioned at sleeve pipe periphery, between forming annular between described sleeve pipe and rock core
Gap, forms cement sheath in annular gap；The upper and lower ends of sleeve pipe and rock core are respectively equipped with upper end cover and bottom end cover；
Autoclave pressure includes kettle and the kettle cover being engaged with kettle；Kettle be provided with cement sheath top together with cement sheath pressure
Power mouthful and testing of being connected with cement sheath bottom alter mouth；Kettle is provided with and the rock core periphery upper end confined pressure that connect mouthful and peripheral with rock core
The pressure relief opening of lower end connection；Kettle is provided with the thermocouple port for installing heating galvanic couple；Kettle is provided with what is connected with inside pipe casing
It is arranged on the casing pressure mouthful of kettle lower end；Kettle cover is provided with the connection for connecting displacement measuring device or drill-in fluid storage barrel
Mouthful；
Control pressurer system includes the pipeline two and set that the pipeline one being connected with confined pressure mouth is connected with cement sheath pressure port
The connected pipeline four of pipe pressure mouthful and the pipeline five being connected with pressure relief opening；
Stop valve one, pressure sensor one, pressure regulator valve one, gas boosting pump, Stress control instrument are connected with pipeline one
And source nitrogen, gas boosting pump is connected with compressed air source；
Stop valve two, stop valve four, pressure sensor two, pressure regulator valve two and stop valve seven are connected with pipeline two；
Pressure sensor four, liquid booster pump and water source, liquid booster pump and compressed air source phase are connected with pipeline four
Even；
Stop valve eight and drainpipe are connected with pipeline five；
Temperature control system includes the thermocouple being arranged on inside kettle that is connected with thermocouple port, thermocouple also with temperature
Control instrument is connected, and kettle outside is wound with cooling tube, and cooling tube is connected with water source；
Channelling detecting system includes altering the pipeline three that mouth is connected with testing, and stop valve six, pressure sensing is connected with pipeline three
Device three, stop valve ten and channelling monitoring device；
Strain measurement system gos deep into inside pipe casing for measuring internal surface of sleeve pipe radial displacement by the connected entrance on kettle cover
Displacement measuring device；
Mud cake simulation system includes drilling fluid storage barrel and rock core filter screen, and the upper and lower ends of drilling fluid storage barrel are respectively equipped with
Stop valve 12 and stop valve 13, the upper end of drilling fluid storage barrel are connected by wireway with nitrogen cylinder, drilling fluid storage barrel
It is connected with kettle cover；Rock core filter screen is nested in the outer wall of rock core.
Preferably：Branch line six is connected with pipeline one and pipeline two, stop valve five is connected with branch line six,
The tie point of branch line six and pipeline two is located between cement sheath pressure port and stop valve two, branch line six and pipeline one
Tie point is located between confined pressure mouthful and stop valve one.
Preferably：Branch line seven is connected with pipeline two and branch line six, cut-off is provided with branch line seven
The tie point of valve three and dehydration bucket, branch line seven and pipeline two is located between stop valve two and pressure regulator valve two, branch line seven
And the tie point of branch line six is located between cement sheath pressure port and stop valve two.
Preferably：Branch line eight is connected with pipeline three, counterbalance valve one and stop valve are provided with branch line eight
11, the end of branch line eight is connected with drainpipe.
Preferably：Branch line nine is connected with pipeline five, counterbalance valve two, branch line are provided with branch line nine
Nine and pipeline five tie point be located between liquid booster pump and pressure sensor four, end and the drainpipe phase of branch line nine
Even.
Preferably：Branch line ten is connected with pipeline five, stop valve nine, branch line are provided with branch line ten
Ten and the tie point of pipeline five be located between pressure sensor four and casing pressure mouthful, end and the drainpipe phase of branch line ten
Even.
Preferably：The inner bottom surface of kettle is provided with positioning boss.
Preferably：The lower end of cement sheath is provided with filter screen.
Preferably：Between kettle and kettle cover, between the connected entrance and displacement measuring device of kettle cover and kettle cover connected entrance
Connecting elements is provided between drill-in fluid storage barrel.
The utility model also provides a kind of method evaluated using Oil/gas Well cement sheath sealing integrity test device,
Including following process：
(1) cement sheath sealing integrity test
The formation of a rock core inwall mud cakes
By rock core filter screen set in the circular cylindrical rock core periphery made, it is put on the positioning boss of kettle bottom surface, uses kettle
Lid compresses sealing, and drilling fluid is configured according to requirement of experiment, closes drilling fluid storage barrel lower end stop valve 13, opens upper end cut-off
Valve 12, during drilling fluid poured into drilling fluid bucket, the volume of drilling fluid can close stop valve ten depending on testing and needing
Two, drilling fluid storage barrel is screwed in the connected entrance of kettle cover, the wireway drawn from nitrogen cylinder is connected to drilling fluid storage barrel
Top, closes stop valve one, stop valve five, stop valve six and stop valve nine, opens stop valve eight, stop valve 12 and stop valve
13, regulation nitrogen cylinder output pressure is 0.5-1.0MPa, opens nitrogen cylinder pressure regulation threshold switch output nitrogen, records time 15-
30 minutes, after the time required to reaching experiment, mud cake is formed under the effect of rock core inside and outside differential pressure, close nitrogen cylinder switch, closed
Stop valve 12 and stop valve 13, dismantle drilling fluid storage barrel and kettle cover, and removal of core is rinsed out with the clear water for slowly flowing
False filter cake on mud cake, and actual cake thickness is measured by Special caliper；
B simulates mine water mud maintenance processes
Cement mortar maintenance in b1 simulation wellbore holes under the conditions of equipressure
After mud cake is formed, rock core and sleeve pipe are embedded on bottom end cover, and cement of different nature is configured according to requirement of experiment
Slurry, is compressed with upper end cover by cement mortar annular space slowly between sprue bushing and rock core, after filling and sealed, by what is assembled
Simulation wellbore hole is inserted in kettle, it is ensured that good seal between bottom end cover and kettle, then screws kettle cover, and displacement measuring device is revolved
Enter the connected entrance at the top of kettle cover, connection system data acquisition software opens stop valve three, stop valve five, treats to have been intake in kettle
Bi Hou, the temperature that kettle is set according to demand is 75-150 DEG C, and the pressure value for setting sleeve pipe, cement annular space and confined pressure is equal, institute
The casing pressure value upper limit is stated for 40MPa, the cement sheath and the confined pressure pressure value upper limit are 30MPa, open liquid booster pump gentle
Body booster pump, and thermocouple is powered work, realize the cement mortar maintenance under the conditions of equipressure in simulation wellbore hole；
The cement mortar that b2 analog casings build the pressure under operating mode is conserved
The operation of b1 is repeated, the pressure value of sleeve pipe, cement annular space and confined pressure is set so that sleeve pipe internal pressure value is more than outside sleeve pipe
The pressure value of cement annular space and confined pressure；
Cement sheath sealing integrity test under c difference operating modes
C1 carries out cement sheath sealing integrity test by adjusting cement sheath top bottom pressure differential
After cement mortar maintenance is finished, stop valve three is closed, open stop valve two, close stop valve five, open stop valve
Nine, now test alter end cement sheath back-pressure will rise to it is identical with cement ring compression, afterwards close stop valve nine, open cut
Only valve 11, adjust counterbalance valve one, cement sheath bottom are tested after altering pressure reduction and cement sheath top formation pressure difference, close cut-off
Valve 11, will test channeling water case and fills water, open stop valve ten and stop valve six, and the cement sheath sealing under test current working is complete
Property；Different pressure difference intervals can be chosen in test, such as selection 2MPa, i.e. cement sheath back pressure often reduces 2MPa and just carry out channelling survey
Examination.
C2 carries out cement sheath sealing integrity test by adjusting sleeve overpressure
Stop valve nine is opened, stop valve 11 is opened, counterbalance valve one is adjusted, makes to form solid between the top and bottom ends of cement sheath
Sizing pressure difference and after pressure difference stabilization after, close stop valve 11；Adjustment counterbalance valve two, sleeve pipe internal pressure is unloaded with fixed intervals
Power, until sleeve pipe internal pressure is zero；Period sleeve pipe internal pressure is often unloaded and once just carry out channelling test, if do not altered
Stream, continues to adjust counterbalance valve two；After sleeve pipe internal pressure is adjusted into former pressure, sleeve pipe is pressurizeed with fixed intervals, and every time
Above-mentioned casing pressure uninstall process is repeated after sleeve pipe pressurization and channelling test is carried out, until cement sheath sealing integrity fails；
Will be using right more than carrying out channelling test under the conditions of external pressure and being carried out with former test result to sleeve pipe internal pressure in test
Than come judge well cementation one interface or second interface generate seal failure problem；Using the monitoring result of displacement measuring device
To judge the size of one interface microannulus of well cementation；
(2) the channelling experiment of different size microannulus
During b2, analog casing builds the pressure after the cement mortar maintenance under operating mode, closes stop valve three, opens stop valve
Two, channelling pattern is selected, stop valve five is closed, stop valve nine is opened, cement sheath top bottom is formed fixed size pressure difference and steady
After fixed, stop valve 11 is closed, adjust counterbalance valve two, with fixed intervals unloader sleeve overpressure, until sleeve pipe internal pressure is zero, the phase
Between sleeve pipe internal pressure often unload once just carry out a channelling test, well cementation one is judged using the monitoring result of displacement measuring device
The size of interface microannulus；
(3) different qualities cement mortar pressure-bearing and sealing aptitude tests
Need to configure mortar architecture of different nature according to test and conserved, after maintenance is finished, close stop valve
Three, stop valve two is opened, select channelling pattern；Close stop valve five.Stop valve nine is opened, is now tested and is altered end cement sheath back pressure pressure
Power will rise to it is identical with cement ring compression, afterwards close stop valve nine, open stop valve 11, adjust counterbalance valve one, will
Cement sheath bottom is tested after altering pressure reduction and cement sheath top formation pressure difference, closes stop valve 11, will test channeling water case and fills water,
Open stop valve ten, stop valve six to be tested, cement sheath top bottom pressure difference is gradually increased in test, if monitored in test
If there is rising, current differential pressure is the limit sealing pressure for being considered as this kind of cement mortar to cement sheath bottom back-pressure；
(4) affecting laws analysis of the different factors to cement sheath sealing integrity
A mud cake properties：Different cake thicknesses can be obtained by changing bleed pressure size and time；Different mud cake properties can
Obtained by changing rock core lithology and drilling fluid composition；
B cement thickness：It is right to be carried out by the end cap up and down of selection different size sleeve pipe, and different internal structure size
Than experiment；
C curing temperatures and pressure：By temperature control instrument and Stress control instrument be programmed respectively temperature control and
Pressure control, sets the temperature and pressure change in cement mortar maintenance processes.
The utility model has following Advantageous Effects：
(1) the utility model can realize to underground difference working condition under cement sheath institute's bearing temperature and from sleeve pipe,
The true simulation of complex formation load, processing range covers Oil/gas Well and bores completion phase cementing well, the examination in production process
Pressure, pilot production, circulation note are adopted and the transformation operating mode such as pressure break.
(2) major function of cement sheath is exactly for sealing and the outer annular space of sealing sleeve pipe, to prevent drilling well, production and transformation
During formation fluid channelling, the present apparatus and evaluation method are with cement annular space equivalent permeability as evaluation index, and it is right to realize
The effective evaluation of cement sheath sealing integrity and cement sheath sealing ability.
(3) realize and the simulation of rock core inwall different-thickness and heterogeneity mud cake under borehole condition is formed, more very
The real actual state for simulating well, further reduces cement sheath in the condition residing for underground.
(4) the cement mortar maintenance processes simulation under the conditions of temperature-pressure is realized, sleeve pipe is particularly realized and is built the pressure operating mode
Under the simulation of cement mortar maintenance processes, and then waited to building the pressure and coagulate caused microannulus and be simulated.And by choosing set tubing
The size of material and control sleeve pipe inside and outside differential pressure, simulation forms various sizes of microannulus.
(5) realized in whole test process, different pressures load-up condition setting of casing is radially using strain measurement system
The real-time measurement of deformation quantity, therefore can further realize monitoring and dimensional measurement to an interface microannulus of cementing the well.
(6) the utility model can be right to evaluate its by changing the factors such as cement thickness, mud cake property, curing temperature
The affecting laws of cement sheath sealing integrity.And pressure-bearing and envelope can be carried out to different qualities cement mortar by changing cement-slurry method
Gu aptitude tests, for the selection of Oil/gas Well slurry design, thin interlayer fracturing technology and Staged Fracturing Technique In Horizontal Wells is provided
Foundation.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model；
Fig. 2 is structural representation of the present utility model two；
Fig. 3 is the structural representation of the utility model autoclave pressure and simulation wellbore hole.
In figure, 1- displacement measuring devices；2- connecting elements；3- kettle covers；4- upper end covers；5- confined pressures mouthful；6- sleeve pipes；7- rocks
The heart；8- cement sheaths；9- kettlies；10- is tested and is altered mouth；11- bottom end covers；12- casing pressures mouthful；13- seals；14- pressure relief openings；15-
Thermocouple port；16- cooling tubes；17- cement sheath pressure ports；18- connected entrances；19- positioning boss；20- rock core filter screens；21- ends
Valve two；22- stop valves four；23- stop valves three；24- pressure sensors two；25- pressure regulator valves two；26- stop valves five；27- ends
Valve one；28- pressure sensors one；29- pressure regulator valves one；30- gas boosting pumps；31- stop valves seven；32- Stress control instrument；
33- compressed air sources；34- source nitrogens；35- stop valves six；36- pressure sensors three；37- stop valves ten；38- water tanks；39- liquid
Flowmeter body；40- counterbalance valves one；41- stop valves 11；42- drainpipes；43- pressure sensors four；44- stop valves nine；45-
Counterbalance valve two；46- liquid booster pumps；47- water sources；48- stop valves eight；49- temperature control instruments；50- dehydrations bucket；51- filter screens；
52- connecting elements；53- stop valves 13；54- drill-in fluid storage barrels；55- stop valves 12；56- nitrogen cylinders.
Specific embodiment
Utility model is described further with reference to specific embodiment.
A kind of Oil/gas Well cement sheath sealing integrity test device as Figure 1-3, including autoclave pressure and positioned at pressure
Simulation wellbore hole inside kettle, described test device also include control pressurer system, temperature control system, channelling detecting system,
Strain measurement system and mud cake simulation system；Wherein, simulation wellbore hole includes sleeve pipe 6 and the rock core 7 positioned at the periphery of sleeve pipe 6, sleeve pipe 6
Annular gap is formed and rock core 7 between, cement sheath 8 is formed in annular gap；The upper and lower ends of sleeve pipe 6 and rock core 7 are respectively equipped with
Upper end cover 4 and bottom end cover 11；Autoclave pressure includes kettle 9 and the kettle cover 3 being engaged with kettle 9；Kettle 9 is provided with and is pushed up with cement sheath 8
Hold together with cement sheath pressure port 17 and testing of connecting with the bottom of cement sheath 8 alter mouth 10；Kettle 9 is provided with and the peripheral upper end of rock core 7
The confined pressure mouthful 5 of connection and the pressure relief opening 14 connected with the peripheral lower end of rock core 7；Kettle 9 is provided with the thermoelectricity for installing heating galvanic couple
Even mouth 15；Kettle 9 is provided with the casing pressure for being arranged on the lower end of kettle 9 mouthful 12 connected with the inside of sleeve pipe 6；Kettle cover 3 be provided with for
The connected entrance 18 of connection displacement measuring device 1 or drill-in fluid storage barrel 54；Control pressurer system includes the pipe being connected with confined pressure mouthful 5
Pipeline four and be connected with pressure relief opening 14 that the pipeline two that Lu Yi is connected with cement sheath pressure port 17 is connected with casing pressure mouthful 12
Pipeline five；Stop valve 1, pressure sensor 1, pressure regulator valve 1, gas boosting pump 30, pressure are connected with pipeline one
Control instrument 32 and source nitrogen 34, gas boosting pump 30 are connected with compressed air source 33；Be connected with pipeline two stop valve 2 21,
Stop valve 4 22, pressure sensor 2 24, pressure regulator valve 2 25 and stop valve 7 31；Pressure sensor four is connected with pipeline four
43rd, liquid booster pump 46 and water source 47, liquid booster pump 46 are connected with compressed air source 33；Stop valve eight is connected with pipeline five
48 and drainpipe 42；Temperature control system includes the thermocouple being arranged on inside kettle 9 being connected with thermocouple port 15, thermocouple
Also it is connected with temperature control instrument 49, the outside of kettle 9 is wound with cooling tube 16, and cooling tube 16 is connected with water source 47；Channelling is detected
System includes altering the pipeline three that mouth 10 is connected with testing, and stop valve 6 35, pressure sensor 3 36, stop valve are connected with pipeline three
10 and channelling monitoring device；Strain measurement system gos deep into the inside of sleeve pipe 6 for measuring sleeve pipe by the connected entrance 18 on kettle cover 3
The displacement measuring device 1 of 6 inwall radial displacements；Mud cake simulation system includes drilling fluid storage barrel 54 and rock core filter screen 20, drilling well
The upper and lower ends of liquid storage barrel 54 are respectively equipped with stop valve 12 and stop valve 13, and the upper end of drilling fluid storage barrel 54 leads to
Cross wireway to be connected with nitrogen cylinder 56, drilling fluid storage barrel 54 is connected with kettle cover 3；Rock core filter screen 20 is nested in the outer wall of rock core 7.
Further, branch line six is connected with pipeline one and pipeline two, stop valve five is connected with branch line six
26, the tie point of branch line six and pipeline two is located between cement sheath pressure port 17 and stop valve 2 21, branch line six with
The tie point of pipeline one is located between confined pressure mouthful 5 and stop valve 1.
Further, branch line seven is connected with pipeline two and branch line six, cut-off is provided with branch line seven
The tie point of valve 3 23 and dehydration bucket 50, branch line seven and pipeline two is located between stop valve 2 21 and pressure regulator valve 2 25, point
The tie point of bye-pass seven and branch line six is located between cement sheath pressure port 17 and stop valve 2 21.
Further, branch line eight is connected with pipeline three, counterbalance valve 1 and cut-off is provided with branch line eight
Valve 11, the end of branch line eight is connected with drainpipe 42.
Further, branch line nine is connected with pipeline five, counterbalance valve 2 45, branched pipe is provided with branch line nine
The tie point of road nine and pipeline five is located between liquid booster pump 46 and pressure sensor 4 43, end and the row of branch line nine
Water pipe 42 is connected.
Further, branch line ten is connected with pipeline five, stop valve 9 44, branched pipe is provided with branch line ten
The tie point of road ten and pipeline five is located between pressure sensor 4 43 and casing pressure mouthful 12, end and the row of branch line ten
Water pipe 42 is connected.
Further, the inner bottom surface of kettle 9 is provided with positioning boss 19.
Further, the lower end of cement sheath 8 is provided with filter screen 51.
Further, between kettle 9 and kettle cover 3, between the connected entrance 18 and displacement measuring device 1 of kettle cover and kettle cover company
Connecting elements 2 is provided between port 18 and drill-in fluid storage barrel 54.
Further, between kettle 9 and kettle cover 3, sleeve pipe 6, rock core 7 and upper end cover 4 and between, bottom end cover 11 and kettle
Seal 13 is provided between 9.
Using the present apparatus for the method that Oil/gas Well cement sheath sealing integrity carries out test evaluation, with reference to Fig. 1-2, specifically
It is described as follows：
1st, cement sheath sealing integrity test
The formation of a rock core inwall mud cakes
As shown in Fig. 2 rock core filter screen 20 to be enclosed within the periphery of circular cylindrical rock core 7 made first, then rock core 7 is put
Enter in kettle 9, be placed on the positioning boss 19 of the bottom surface of kettle 9, compressed with kettle cover 3 and sealed.Drilling well is configured according to requirement of experiment
Liquid, closes the lower end stop valve 13 of drilling fluid storage barrel 54, and opens upper end stop valve 12, and at top, the mouth of pipe places leakage
Bucket water conservancy diversion, drilling fluid storage barrel 54 is poured into by drilling fluid, and the volume of drilling fluid can need to determine according to experiment, typically can coring content
Long-pending 2-3 times.Stop valve 12 is closed, drilling fluid storage barrel 54 is screwed in into kettle cover connected entrance 18, will drawn from nitrogen cylinder 56
Wireway be connected to the top of drilling fluid storage barrel 54.Close stop valve 1, stop valve 5 26, stop valve 6 35 and cut-off
Valve 9 44, opens stop valve 8 48, opens stop valve 12 and stop valve 13.Adjusting the output pressure of nitrogen cylinder 56 is
0.5-1.0MPa, opens the pressure regulation threshold switch of nitrogen cylinder 56 output nitrogen, records the time, and the time is generally 15-30 minutes, is reaching
After the time required to experiment, close nitrogen cylinder 56 and switch.Close stop valve 12 and stop valve 13, dismounting drilling fluid storage
Bucket 54 and kettle cover 3, removal of core 7, the false filter cake on mud cake are rinsed out with the clear water for slowly flowing, and measure by Special caliper
Actual cake thickness.In method formed above, different cake thicknesses can be obtained by changing bleed pressure size and time；It is different
Mud cake property can be obtained by changing rock core lithology and drilling fluid composition.
B simulates mine water mud maintenance processes
Cement mortar maintenance in b1 simulation wellbore holes under the conditions of equipressure
After mud cake is formed, rock core 7 and sleeve pipe 6 are embedded on bottom end cover 11, and configure of different nature according to requirement of experiment
Cement mortar, by cement mortar annular space slowly between sprue bushing 6 and rock core 7, sealing is compressed after filling with upper end cover 4.Will
The simulation wellbore hole for assembling is inserted in kettle 9, it is ensured that good seal between bottom end cover 11 and kettle 9, then screws kettle cover 3.Will
Displacement measuring device 1 screws in the top connected entrance 18 of kettle cover 3, connection system data acquisition software.Open stop valve 3 23, stop valve
5 26, after water inlet is finished in the kettle 9, set the temperature value of kettle 9 according to demand, usually 75-150 DEG C, set sleeve pipe 6,
The pressure value of cement annular space and confined pressure is equal, and (the casing pressure value upper limit is 40MPa, and cement sheath and the confined pressure pressure value upper limit are
30MPa), liquid booster pump 46 and gas booster pump 30 are opened, and thermocouple is powered work, realize waiting press strip in simulation wellbore hole
Cement mortar maintenance under part.
The cement mortar that b2 analog casings build the pressure under operating mode is conserved
The difference of the cement mortar maintenance processes in the method and above-mentioned pit shaft under the conditions of equipressure is, initial setting up sleeve pipe internal pressure
Value such as can be set 40MPa in sleeve pipe, cement sheath pressure and confined pressure 20MPa more than the outer cement annular space of sleeve pipe and the pressure value of confined pressure, its
Its step is same as mentioned above.
Cement sheath sealing integrity test under c difference operating modes
C1 carries out cement sheath sealing integrity test by adjusting cement sheath top bottom pressure differential
Gas or water can be chosen to test cement sheath sealing integrity as medium.Said by taking has channeling as an example
It is bright：
After cement mortar maintenance is finished, stop valve 3 23 is closed, open stop valve 2 21, select Breakthrough Pattern.Close and cut
Only valve 5 26.Open stop valve 9 44, now test alter end cement sheath back-pressure will rise to it is identical with cement ring compression, it
Stop valve 9 44 is closed afterwards.Stop valve 11 is opened, counterbalance valve 1 is adjusted, cement sheath bottom is tested and is altered pressure reduction and water
After mud ring top forms pressure difference, stop valve 11 is closed.Channeling water case 38 will be tested and fill water, open stop valve 10, stop valve
6 35, the cement sheath sealing integrity under test current working.Different pressure difference intervals can be chosen in test, 2MPa is such as selected, i.e.,
Cement sheath back pressure often reduces 2MPa and just carries out channelling test.
C2 carries out cement sheath sealing integrity test by adjusting sleeve overpressure
There is no the problem of cement sheath sealing integrity failure in whole test as described above, can proceed with sleeve pipe internal pressure
The alternately cement sheath sealing integrity test under change condition.
Stop valve 9 44 is opened, stop valve 11 is opened, counterbalance valve 1 is adjusted, cement sheath top bottom is formed fixation
After big small pressure difference and stabilization, stop valve 11 is closed.Adjustment counterbalance valve 2 45, with fixed intervals unloader sleeve overpressure, directly
It is zero to the internal pressure of sleeve pipe 6.The internal pressure of period sleeve pipe 6 is often unloaded and once just carry out channelling test, if not there is channelling, after
Continuous adjustment counterbalance valve 2 45, after the internal pressure of sleeve pipe 6 is adjusted into former pressure, is pressurizeed with fixed intervals to sleeve pipe, is such as added every time
Above-mentioned casing pressure uninstall process is repeated after 5MPa, and each sleeve pipe pressurization and carry out channelling test, until cement sheath has been sealed
Whole property failure.
Will be using right more than carrying out channelling test under the conditions of external pressure and being carried out with former test result to sleeve pipe internal pressure in test
Than come judge well cementation one interface or second interface generate seal failure problem.In addition, using the monitoring of displacement measuring device
Result come judge cement the well an interface microannulus size.
2nd, the gas channelling experiment of different size microannulus
In method b2, analog casing builds the pressure after the cement mortar maintenance under operating mode, closes stop valve 3 23, opens stop valve
2 21, select Breakthrough Pattern.Close stop valve 5 26.Stop valve 9 44 is opened, cement sheath top bottom is formed fixed size pressure
After difference and stabilization, stop valve 11 is closed.Adjustment counterbalance valve 2 45, with fixed intervals unloader sleeve overpressure, until sleeve pipe
Internal pressure is zero, and period sleeve pipe internal pressure is often unloaded and once just carry out channelling test.Using the monitoring result of displacement measuring device
To judge the size of one interface microannulus of well cementation.
3rd, different qualities cement mortar pressure-bearing and sealing aptitude tests
Need to configure mortar architecture of different nature according to test and conserved, after maintenance is finished, close stop valve
3 23, stop valve 2 21 is opened, select Breakthrough Pattern.Close stop valve 5 26.Stop valve 9 44 is opened, is now tested and is altered end cement
Ring back-pressure will rise to it is identical with cement ring compression, afterwards close stop valve 9 44.Open stop valve 11, adjustment
Counterbalance valve 1, cement sheath bottom is tested after altering pressure reduction and cement sheath top formation pressure difference, closes stop valve 11.Will
Test channeling water case 38 and fill water, open stop valve 10, stop valve 6 35 and tested, cement sheath top bottom is gradually increased in test
Pressure difference.If monitoring cement sheath bottom back-pressure if there is rising in test, current differential pressure is to be considered as this kind of cement mortar
Limit sealing pressure.
4th, affecting laws analysis of the different factors to cement sheath sealing integrity
A mud cake properties：Different cake thicknesses can be obtained by changing bleed pressure size and time；Different mud cake properties can
Obtained by changing rock core lithology and drilling fluid composition；
B cement thickness：It is right to be carried out by the end cap up and down of selection different size sleeve pipe, and different internal structure size
Than experiment.
C curing temperatures and pressure：Temperature control and pressure control are programmed by temperature control instrument and Stress control instrument respectively,
Temperature and pressure change in cement mortar maintenance processes is set.
Claims (9)
1. a kind of Oil/gas Well cement sheath sealing integrity test device, it is characterised in that：Including autoclave pressure and in autoclave pressure
The simulation wellbore hole in portion, described test device also includes control pressurer system, temperature control system, channelling detecting system, strain
Measuring system and mud cake simulation system；
Described simulation wellbore hole includes sleeve pipe (6) and the rock core (7) positioned at sleeve pipe (6) periphery, described sleeve pipe (6) and rock core
(7) annular gap is formed between, cement sheath (8) is formed in described annular gap；Described sleeve pipe (6) and rock core (7) it is upper and lower
It is respectively arranged at two ends with upper end cover (4) and bottom end cover (11)；
Described autoclave pressure includes kettle (9) and the kettle cover (3) being engaged with kettle (9)；Described kettle (9) is provided with and cement
Ring (8) top together with cement sheath pressure port (17) and testing of connecting with cement sheath (8) bottom alter mouth (10)；Described kettle
(9) confined pressure mouthful (5) connected with rock core (7) periphery upper end and the pressure relief opening (14) connected with rock core (7) periphery lower end are provided with；Institute
The kettle (9) stated is provided with the thermocouple port (15) for installing heating galvanic couple；Described kettle (9) is provided with internal with sleeve pipe (6)
The casing pressure for being arranged on kettle (9) lower end mouthful (12) of connection；Described kettle cover (3) is provided with for connecting displacement measuring device
(1) or drill-in fluid storage barrel (54) connected entrance (18)；
Described control pressurer system includes the pipe that the pipeline one being connected with confined pressure mouthful (5) is connected with cement sheath pressure port (17)
Pipeline four that road two and casing pressure mouthful (12) are connected and the pipeline five being connected with pressure relief opening (14)；
Stop valve one (27), pressure sensor one (28), pressure regulator valve one (29), gas boosting pump are connected with described pipeline one
(30), Stress control instrument (32) and source nitrogen (34), described gas boosting pump (30) are connected with compressed air source (33)；
Stop valve two (21), stop valve four (22), pressure sensor two (24), pressure regulator valve two are connected with described pipeline two
And stop valve seven (31) (25)；
Pressure sensor four (43), liquid booster pump (46) and water source (47), described liquid are connected with described pipeline four
Booster pump (46) is connected with compressed air source (33)；
Stop valve eight (48) and drainpipe (42) are connected with described pipeline five；
Described temperature control system includes that what is be connected with thermocouple port (15) is arranged on the thermocouple of kettle (9) inside, described
Thermocouple be also connected with temperature control instrument (49), described kettle (9) outside is wound with cooling tube (16), described cooling
Pipe (16) is connected with water source (47)；
Described channelling detecting system includes altering the pipeline three that mouth (10) is connected with testing, and stop valve is connected with described pipeline three
Six (35), pressure sensor three (36), stop valve ten (37) and channelling monitoring device；
Described strain measurement system is goed deep into inside sleeve pipe (6) for measuring sleeve pipe (6) by the connected entrance (18) on kettle cover (3)
The displacement measuring device (1) of inwall radial displacement；
Described mud cake simulation system includes drilling fluid storage barrel (54) and rock core filter screen (20), the drilling fluid storage barrel (54)
Upper and lower ends be respectively equipped with stop valve ten two (55) and stop valve ten three (53), the upper end of the drilling fluid storage barrel (54) leads to
Cross wireway to be connected with nitrogen cylinder (56), the drilling fluid storage barrel (54) is connected with kettle cover (3)；Described rock core filter screen (20)
It is nested in the outer wall of rock core (7).
2. Oil/gas Well cement sheath sealing integrity test device according to claim 1, it is characterised in that：The pipeline one
With branch line six is connected with pipeline two, stop valve five (26), described branched pipe are connected with described branch line six
The tie point of Lu Liuyu pipelines two be located between cement sheath pressure port (17) and stop valve two (21), the branch line six with manage
The tie point on road one is located between confined pressure mouthful (5) and stop valve one (27).
3. Oil/gas Well cement sheath sealing integrity test device according to claim 1, it is characterised in that：The pipeline two
With branch line seven is connected with branch line six, be provided with described branch line seven stop valve three (23) and dehydration bucket
(50), described branch line seven and the tie point of pipeline two are located between stop valve two (21) and pressure regulator valve two (25), described
Branch line seven and branch line six tie point be located between cement sheath pressure port (17) and stop valve two (21).
4. Oil/gas Well cement sheath sealing integrity test device according to claim 1, it is characterised in that：Described pipeline
Branch line eight is connected with three, counterbalance valve one (40) and stop valve ten one (41), institute are provided with described branch line eight
The end for stating branch line eight is connected with drainpipe (42).
5. Oil/gas Well cement sheath sealing integrity test device according to claim 1, it is characterised in that：Described pipeline
Branch line nine is connected with five, counterbalance valve two (45), the branch line nine and pipe are provided with described branch line nine
The tie point on road five is located between liquid booster pump (46) and pressure sensor four (43), end and the row of the branch line nine
Water pipe (42) is connected.
6. Oil/gas Well cement sheath sealing integrity test device according to claim 1, it is characterised in that：Described pipeline
Branch line ten is connected with five, stop valve nine (44), the branch line ten and pipe are provided with described branch line ten
The tie point on road five is located between pressure sensor four (43) and casing pressure mouthful (12), end and the row of the branch line ten
Water pipe (42) is connected.
7. Oil/gas Well cement sheath sealing integrity test device according to claim 1, it is characterised in that：The kettle
(9) inner bottom surface is provided with positioning boss (19).
8. Oil/gas Well cement sheath sealing integrity test device according to claim 1, it is characterised in that：The cement sheath
(8) lower end is provided with filter screen (51).
9. Oil/gas Well cement sheath sealing integrity test device according to claim 1, it is characterised in that：The kettle
(9) and kettle cover (3) between, between the connected entrance (18) and displacement measuring device (1) of kettle cover and kettle cover connected entrance (18) with bore
Connecting elements (2) is provided between feed liquor storage barrel (54).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621206382.4U CN206233918U (en) | 2016-11-09 | 2016-11-09 | Oil/gas Well cement sheath sealing integrity test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621206382.4U CN206233918U (en) | 2016-11-09 | 2016-11-09 | Oil/gas Well cement sheath sealing integrity test device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206233918U true CN206233918U (en) | 2017-06-09 |
Family
ID=58990828
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621206382.4U Expired - Fee Related CN206233918U (en) | 2016-11-09 | 2016-11-09 | Oil/gas Well cement sheath sealing integrity test device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206233918U (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106522923A (en) * | 2016-11-09 | 2017-03-22 | 中国石油大学(华东) | Oil/gas well cement sheath sealing integrity testing device and method for carrying out evaluation through device |
| CN110318735A (en) * | 2018-03-27 | 2019-10-11 | 中国石油化工股份有限公司 | Well cementation set cement damage monitoring device and data collection method |
| CN110424947A (en) * | 2019-07-31 | 2019-11-08 | 长江大学 | A method of measurement the first interface microannulus size of well cementation |
| CN111141644A (en) * | 2020-02-28 | 2020-05-12 | 贝士德仪器科技(北京)有限公司 | Filter membrane aperture analyzer with liquid sealing pressure relief protection device |
| CN111307690A (en) * | 2020-04-13 | 2020-06-19 | 西南石油大学 | Packing performance testing device and method for annular cement ring of oil-gas well cylinder |
| CN111537439A (en) * | 2020-05-09 | 2020-08-14 | 广东省特种设备检测研究院 | System and method for automatically identifying and evaluating defects of pressure-bearing equipment |
| CN111622743A (en) * | 2018-12-19 | 2020-09-04 | 中国地质大学（北京） | Tiltable and eccentric cementing second interface cementing quality evaluation method |
| CN111693455A (en) * | 2020-05-14 | 2020-09-22 | 中国石油大学(北京) | Drilling fluid mud cake generation test method |
| CN112065364A (en) * | 2019-06-10 | 2020-12-11 | 中国石油天然气股份有限公司 | Well cementation performance determining device |
| CN112443288A (en) * | 2019-08-12 | 2021-03-05 | 中国石油化工股份有限公司 | Experimental device for evaluating sealing capability of two interfaces of well cementation cement sheath |
| CN115788403A (en) * | 2022-12-02 | 2023-03-14 | 中海石油(中国)有限公司湛江分公司 | Underwater Christmas tree testing system and method |
-
2016
- 2016-11-09 CN CN201621206382.4U patent/CN206233918U/en not_active Expired - Fee Related
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106522923A (en) * | 2016-11-09 | 2017-03-22 | 中国石油大学(华东) | Oil/gas well cement sheath sealing integrity testing device and method for carrying out evaluation through device |
| CN110318735A (en) * | 2018-03-27 | 2019-10-11 | 中国石油化工股份有限公司 | Well cementation set cement damage monitoring device and data collection method |
| CN111622743B (en) * | 2018-12-19 | 2022-01-25 | 中国地质大学（北京） | Tiltable and eccentric cementing second interface cementing quality evaluation method |
| CN111622743A (en) * | 2018-12-19 | 2020-09-04 | 中国地质大学（北京） | Tiltable and eccentric cementing second interface cementing quality evaluation method |
| CN112065364A (en) * | 2019-06-10 | 2020-12-11 | 中国石油天然气股份有限公司 | Well cementation performance determining device |
| CN112065364B (en) * | 2019-06-10 | 2023-11-28 | 中国石油天然气股份有限公司 | Well cementation performance determining device |
| CN110424947A (en) * | 2019-07-31 | 2019-11-08 | 长江大学 | A method of measurement the first interface microannulus size of well cementation |
| CN112443288A (en) * | 2019-08-12 | 2021-03-05 | 中国石油化工股份有限公司 | Experimental device for evaluating sealing capability of two interfaces of well cementation cement sheath |
| CN111141644A (en) * | 2020-02-28 | 2020-05-12 | 贝士德仪器科技(北京)有限公司 | Filter membrane aperture analyzer with liquid sealing pressure relief protection device |
| CN111307690A (en) * | 2020-04-13 | 2020-06-19 | 西南石油大学 | Packing performance testing device and method for annular cement ring of oil-gas well cylinder |
| CN111307690B (en) * | 2020-04-13 | 2022-05-06 | 西南石油大学 | Packing performance testing device and method for annular cement ring of oil-gas well cylinder |
| CN111537439A (en) * | 2020-05-09 | 2020-08-14 | 广东省特种设备检测研究院 | System and method for automatically identifying and evaluating defects of pressure-bearing equipment |
| CN111693455A (en) * | 2020-05-14 | 2020-09-22 | 中国石油大学(北京) | Drilling fluid mud cake generation test method |
| CN115788403A (en) * | 2022-12-02 | 2023-03-14 | 中海石油(中国)有限公司湛江分公司 | Underwater Christmas tree testing system and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206233918U (en) | Oil/gas Well cement sheath sealing integrity test device | |
| CN106522923A (en) | Oil/gas well cement sheath sealing integrity testing device and method for carrying out evaluation through device | |
| CN104153760B (en) | Oil/gas Well cement sheath sealing characteristics simulating test device and experimental technique | |
| CN111997589B (en) | Full-size cement sheath packing capacity and bonding strength testing device and testing method thereof | |
| CN209875145U (en) | Oil gas well cement sheath sealing integrity testing arrangement | |
| CN107167396A (en) | Evaluating apparatus and method that working solution temperature shock influences on pit shaft mechanical integrity | |
| US7296927B2 (en) | Laboratory apparatus and method for evaluating cement performance for a wellbore | |
| CN204024635U (en) | A kind of Oil/gas Well cement ring sealing characteristics simulating test device | |
| CN112145155A (en) | Experimental method of evaluation device capable of eccentrically testing cementing quality of first interface of well cementation | |
| CN106771096A (en) | A kind of cementing concrete ring seal is every ability dynamic checkout unit and experimental technique | |
| CN201273190Y (en) | Triaxial-stress multi-pressure test point rock core reservoir simulation device | |
| CN104405366A (en) | Device and method for testing mechanical integrity of high-temperature high-pressure well cementation cement sheath | |
| CN109001438A (en) | A kind of joint seal gas shutoff experimental simulation device and test method | |
| CN203756119U (en) | Sleeve subassembly for simulated cementation test | |
| CN104406910A (en) | Apparatus and method for testing cementation capability of well cementation first and second interfaces under high-temperature high-pressure conditions | |
| CN101109281A (en) | High-temperature high-pressure clay cake interface agglutination simulating-estimating device | |
| Opedal et al. | Laboratory test on cement plug integrity | |
| CN103808652B (en) | A kind of analog temperature change causes the method for cementing inefficacy of cementing the well | |
| CN107991165B (en) | Cement sheath air tightness failure judgment method | |
| CN114033360B (en) | Full life cycle shaft seal integrity evaluation device and method | |
| CN108571313A (en) | A kind of down-hole casing deformation simulator and method | |
| CN203756155U (en) | Well cementation failure evaluation device | |
| CN110593811A (en) | Cement sheath initial stress state monitoring experiment method | |
| CN112832743A (en) | Rapid-measurement type cement sheath integrity experimental device and evaluation method | |
| CN105804738A (en) | Visualization evaluation device for stability and integrity of clay shale borehole wall |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170609 Termination date: 20171109 |