CN205982211U - Experimental device for be used for testing pressure transmission between drilling fluid and rock - Google Patents
Experimental device for be used for testing pressure transmission between drilling fluid and rock Download PDFInfo
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- CN205982211U CN205982211U CN201620578047.0U CN201620578047U CN205982211U CN 205982211 U CN205982211 U CN 205982211U CN 201620578047 U CN201620578047 U CN 201620578047U CN 205982211 U CN205982211 U CN 205982211U
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Abstract
The utility model discloses an experimental device for be used for testing pressure transmission between drilling fluid and rock, including connect gradually drilling fluid circulating device, core clamping device and data acquiring and processing device together. The utility model discloses an experimental apparatus drilling fluid dynamic circulation process under can the simulation well, simultaneously, can also be in succession carry out the pressure transmission test to same core sample, avoid the experimental error that core sample difference arouses, additionally, the utility model discloses a multi -point test has still been realized to the experimental apparatus, has improved the feasibility of growing the test of rock specimen pressure transmission to the crack at to a great extent.
Description
Technical field
The utility model is related to field of petroleum exploitation and in particular to one kind is used for testing pressure transmission between drilling fluid and rock
Experimental provision.
Background technology
The complex situations such as the cave-in, undergauge and the formation breakdown that occur in drilling well or Completion Operations are referred to as the borehole wall and lose
Surely, it mostly occurs in mud shale stratum.Borehole well instability not only has a strong impact on geological logging, extends drilling period and increase brill
Well cost, but also reservoir can be polluted, cause heavy economic losses.The reason cause borehole well instability, nothing more than inevitable
The acquired disposition that innate factor and wellbore construction cause.Innate factor mainly includes：The composition of formation rock and physical chemistry
Matter, geological structure type, In-situ stress, the power of degree of consolidation between stratigraphic dip, and lithosphere, rock strength
Size and bearing capacity size etc..Acquired disposition mainly includes：Bore completion mode, the collision to the borehole wall of well track and drilling tool
Deng, but focus more on property of drilling fluid aspect, the such as depth of drilling fluid filtrate invaded formation, the inhibition of drilling fluid and seal-off effect
Etc. aspect.
Before opening stratum, the rock being embedded in stratum depths is subject to overlying rock pressure, maximum horizontal crustal stress simultaneously
Effect with minimum level crustal stress and be in mechanical balance state.When rock is crushed by drill bit, drilling fluid is contacted with stratum, well
The stress of wall country rock just there occurs change, without the support to the borehole wall for the rock in former well, the substitute is drilling well
The support to the borehole wall for the liquid liquid column hydrostatic pressure.Under this new mechanical condition, wellbore stress redistributes, and makes to produce around the borehole wall
High stress concentration, if now rock strength is not enough or drilling fluid liquid column hydrostatic pressure underbraced, arises that the borehole wall
Unstable phenomenon.
Can be solved by improving the inhibition of drilling fluid currently for intumescent stratum borehole well instability, and for hard
The borehole well instability problem containing crack mud shale stratum of fragility, reduces drilling fluid often through adding plugging material in drilling fluid
Filter loss, slow down the pressure transmission between drilling fluid and borehole wall surrounding rock, that is, reduce the changing of horizontal stress of pit shaft country rock
Variable, the measure extending collapse cycle means is solving.It is commonly used in the reality of pressure transmission between test drilling fluid and rock
Experiment device is shale hydration-Coupling with Mechanics (SHM) analogue means researched and developed by China Petroleum Univ. (East-China).The base of this device
Present principles are to set up initial differential pressure in rock sample upper and lower ends to be measured, in the case of keeping an end pressure constant, are passed by pressure reduction
Sensor detects the dynamic differential pressure change at rock sample two ends, when differential pressure pickup display result is zero, that is, regards rock sample breakdown, now
It is the pressure penetration moment.However, this device can only carry out pressure transmission test to single rock sample.The rock sample no matter test uses
It is natural core or artificial core, same core all cannot be realized with second test, especially instant pressure cannot be punctured
Core carry out pressure transmission test；Secondly, this device does not have drilling fluid entrance tubing string in simulation actual well drilled construction and sprays
Afterwards, flow through tubing string and the annular space that the borehole wall (or sleeve pipe) is formed flows up into the cyclic process of mud pit, for suspension
For the drilling fluid of less stable, the high density solid fraction in drilling fluid easily falls to overlaying on rock sample surface, thus affecting to survey
The accuracy of test result.
Utility model content
The utility model be directed to the deficiencies in the prior art in place of it is proposed that one kind is used for testing pressure between drilling fluid and rock
The experimental provision of transmission, it can simulate down-hole drilling fluids dynamic circulation process.
A kind of experimental provision for testing pressure transmission between drilling fluid and rock being provided according to the utility model, including
The DFCU that is connected in turn, core clamping device data acquisition processing device.
According to the utility model, the drilling fluid in DFCU flows through core folder through DFCU circulation
Hold device, the diverse location that during circulation of drilling fluid, core is accommodated with the core sample in device produces different pressure, should
Different pressure changes is acquired by data acquisition processing device and exports, thus realizing to down-hole drilling fluids dynamic circulation
The simulation of process.
In some embodiments, DFCU is included by pipeline connection fluid-containing pot together, circulating pump
With simulation drilling tool, simulation drilling tool is connected with core blessing device, so that the drilling fluid in fluid-containing pot is in the effect of circulating pump
Down simulation drilling tool is flowed through successively by pipeline and core accommodates device Posterior circle and returns fluid-containing pot.
In some embodiments, core clamping device is included the first cylinder body being connected with simulation drilling tool and is used for clamping
Second cylinder body of core sample, the first cylinder body and the second cylinder body are interconnected.Preferably, the second cylinder body is mutually vertical with the first cylinder body
Directly.
In some embodiments, the openend of the first cylinder body is provided with the first cylinder cap, and simulation drilling tool passes through the first cylinder cap
It is fixed in the first cylinder body.
In some embodiments, the first cylinder cap is additionally provided with return port, return port is connected with fluid-containing pot.
In some embodiments, the outer wall of the outer wall of the first cylinder body and the second cylinder body is provided with heating mantle.
In some embodiments, between the second cylinder body and core sample button type be provided with bearing plate and increased pressure board so that
Obtain core sample to be surrounded completely by bearing plate and increased pressure board.
In some embodiments, it is additionally provided with rubber sleeve between bearing plate and increased pressure board and core sample.
In some embodiments, the outer wall contacting with bearing plate of the second cylinder body is provided with and extends to core sample
Instrument connection.Preferably, the number of instrument connection is equally distributed multiple along in the axial direction of the second cylinder body.
In some embodiments, data acquisition unit includes the first pressure controller being connected with increased pressure board, with test
The second pressure sensor that hole is connected, and it is arranged on the 3rd pressure sensing on the pipeline between simulation drilling tool and fluid-containing pot
Device, wherein, first pressure controller, second pressure sensor and the 3rd pressure sensor are all connected with computer.
Compared with prior art, the utility model has advantages below：
1) experimental provision of the present utility model is by simulating drilling fluid after fluid-containing pot, simulation drilling tool and core clamping device
Flow back to the process of fluid-containing pot, the cyclic process of drilling fluid during true reappearance site operation, wherein, in core clamping device
Heating mantle achieve the simulation to down-hole formation temperature conditionss；
2) experimental provision of the present utility model continuously can carry out pressure transmission test to same core sample, it is to avoid rock
The experimental error that core sample difference causes；
3) experimental provision of the present utility model achieves multi-point sampler, improves fracture to a great extent and relatively develops rock
The feasibility of sample pressure transmission test.
Brief description
Hereinafter will be based on embodiment and refer to the attached drawing is being described in more detail to the utility model.Wherein：
Fig. 1 is to be shown according to the structure for testing the experimental provision of pressure transmission between drilling fluid and rock of the present utility model
It is intended to；
Fig. 2 is the cross-sectional view of the structure of the core clamping device shown in Fig. 1.
In the accompanying drawings, identical part uses identical reference.Accompanying drawing is not drawn according to actual ratio.
Specific embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
Details described here is exemplary, and is only used for embodiment of the present utility model is illustratively begged for
It is to provide for being considered as most useful and the most readily understood to principle of the present utility model and concept aspect by, the presence of which
Description.With regard to this point, it is not attempted to here exceed this practicality of basic comprehension to CONSTRUCTED SPECIFICATION of the present utility model
The introduction of new required degree, how those skilled in the art is clearly understood that in reality by specification and its accompanying drawing
Trample middle enforcement several forms of the present utility model.
Fig. 1 shows a kind of experiment for testing pressure transmission between drilling fluid and rock providing according to the utility model
The structural representation of device 100.This device 100 includes DFCU, the core clamping device being connected in turn
Data acquisition processing device.
According to the utility model, the drilling fluid in DFCU flows through core folder through DFCU circulation
Hold device, the diverse location that during circulation of drilling fluid, core is accommodated with the core sample 13 in device produces different pressure,
This different pressure change is acquired by data acquisition processing device and exports, thus realizing down-hole drilling fluids are dynamically followed
The simulation of ring process.
As shown in figure 1, DFCU is included by pipeline connection fluid-containing pot 1 together, circulating pump 2 and simulation
Drilling tool 5, simulation drilling tool 5 accommodates device with core and is connected, so that the drilling fluid in fluid-containing pot 1 is in the presence of circulating pump 2
Simulation drilling tool 5 is flowed through successively by pipeline and core accommodates device Posterior circle and returns fluid-containing pot 1.
In the embodiment shown in fig. 1, drilling fluid is put in fluid-containing pot 1, open the circulation pump 2, drilling fluid is distinguished
By feed tube 3, simulation drilling tool 5, simulation drilling tool 5 and the first cylinder body 6 between annular space, the return port 8 on the first cylinder cap 7 and return
Flow tube line 9, flows into fluid-containing pot 1 to realize dynamic circulation.Wherein, the circulating pressure of drilling fluid can pass through the 3rd pressure sensor
4 carry out Accurate Determining；The temperature of drilling fluid can be by being wrapped in the heating mantle 10 of the first cylinder body 6 and the second cylinder body 12 outer surface
It is adjusted, actual temp value is controlled by temperature controller 11, thus simulating the dynamic circulation mistake of wellbore construction scene drilling fluid
Journey.
According to the utility model, as shown in figure 1, core clamping device includes the first cylinder body 6 being connected with simulation drilling tool 5
With the second cylinder body 12 for clamping core sample 13, the first cylinder body 6 and the second cylinder body 12 are interconnected.Preferably, the second cylinder
Body 12 is mutually perpendicular to the first cylinder body 6.The openend of the first cylinder body 6 is provided with the first cylinder cap 7, and simulation drilling tool 5 passes through the first cylinder
Lid 7 is fixed in the first cylinder body 6.Meanwhile, the first cylinder cap 7 is additionally provided with return port 8, return port 8 is connected with fluid-containing pot 1.
It should be noted that the first cylinder body 6 and the second cylinder body 12 can also be integral structures.
According to the utility model, as shown in Fig. 2 button type is provided with bearing plate between the second cylinder body 12 and core sample 13
17 and increased pressure board 18 so that core sample 13 is surrounded completely by bearing plate 17 and increased pressure board 18.Preferably, bearing plate 17 and plus
It is additionally provided with rubber sleeve 14 between pressing plate 18 and core sample 13.
In conjunction with shown in Fig. 1 and Fig. 2, core sample 13 is put in the second cylinder body 12, covers closure 15.Open the first pressure
Force controller 19, controls the direction extruding to bearing plate 17 for the increased pressure board 18, thus giving core sample 13 certain confined pressure.Rubber
Set 14 is wrapped in the outer surface of core sample 13, thus ensureing the stability of confined pressure value.
Return to Fig. 1, the outer wall contacting with bearing plate 17 of the second cylinder body 12 is provided with and extends to core sample 13
Instrument connection 20.Preferably, the number of instrument connection 20 is equally distributed multiple along in the axial direction of the second cylinder body 12.Due to drilling fluid
Dynamic circulation process can cause the pressure value changes of core sample 13 different loci, therefore passes through to arrange multiple instrument connection 20 (figures
In only symbolically marked one) pressure value of the different loci of core sample 13 can be detected.This pressure value is led to
The second pressure sensor 21 crossing connecting test hole 20 is measured.It is preferably located at the end-blocking instrument connection 16 on closure 15
The second pressure sensor 21 connecting can measure pressure and puncture change value of pressure during core sample 13, and its measurement result is passed through
The computer 22 being connected with second pressure sensor 21 is collected and analyzes, it is achieved thereby that pressure passes between drilling fluid and rock
Pass the purpose of test.
It should be noted that foregoing example is only for the purpose of explaining, and it is not construed as limiting the utility model.
Although being described to the utility model according to exemplary embodiment it being understood, however, that used herein is description
Property and illustrative language, rather than restricted language.In the presently described and scope of the following claims of modification,
In the scope without departing from scope and spirit of the present utility model, the utility model can be changed.Although here
According to specific mode, material and embodiment, the utility model is described, but the utility model is not limited in here
Disclosed details；On the contrary, the utility model extends to all identical functions for example within the scope of the appended claims
Structure, methods and applications.
Claims (8)
1. a kind of experimental provision for testing pressure transmission between drilling fluid and rock is it is characterised in that include：It is connected in turn
DFCU together, core clamping device data acquisition processing device,
Described DFCU is included by pipeline connection fluid-containing pot together, circulating pump and simulation drilling tool, described mould
Intend drilling tool to be connected with described core blessing device, so that the drilling fluid in described fluid-containing pot is in the presence of described circulating pump
Described simulation drilling tool is flowed through successively by described pipeline and described core accommodates device Posterior circle and returns described fluid-containing pot,
Described core clamping device includes and described simulation the first cylinder body of being connected of drilling tool and for clamping core sample the
Two cylinder bodies, described first cylinder body and described second cylinder body are interconnected.
2. the experimental provision for testing pressure transmission between drilling fluid and rock according to claim 1 it is characterised in that
The openend of described first cylinder body is provided with the first cylinder cap, and described simulation drilling tool is fixed on described first by described first cylinder cap
In cylinder body.
3. the experimental provision for testing pressure transmission between drilling fluid and rock according to claim 2 it is characterised in that
It is additionally provided with return port, described return port is connected with described fluid-containing pot on described first cylinder cap.
4. the experimental provision for testing pressure transmission between drilling fluid and rock according to any one of claim 1 to 3,
It is characterized in that, the outer wall of the outer wall of described first cylinder body and described second cylinder body is provided with heating mantle.
5. the experimental provision for testing pressure transmission between drilling fluid and rock according to any one of claim 1 to 3,
It is characterized in that, between described second cylinder body and described core sample, button type is provided with bearing plate and increased pressure board so that described
Core sample is surrounded completely by described bearing plate and described increased pressure board.
6. the experimental provision for testing pressure transmission between drilling fluid and rock according to claim 5 it is characterised in that
It is additionally provided with rubber sleeve between described bearing plate and described increased pressure board and described core sample.
7. the experimental provision for testing pressure transmission between drilling fluid and rock according to claim 5 it is characterised in that
It is provided with, on the outer wall contacting with described bearing plate of described second cylinder body, the instrument connection extending to described core sample.
8. the experimental provision for testing pressure transmission between drilling fluid and rock according to claim 5 it is characterised in that
Described data acquisition unit includes the first pressure controller being connected with described increased pressure board, the second pressure being connected with described instrument connection
Force snesor, and it is arranged on the 3rd pressure sensor on the pipeline between described simulation drilling tool and described fluid-containing pot, its
In, described first pressure controller, described second pressure sensor are all connected with computer with described 3rd pressure sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620578047.0U CN205982211U (en) | 2016-06-13 | 2016-06-13 | Experimental device for be used for testing pressure transmission between drilling fluid and rock |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620578047.0U CN205982211U (en) | 2016-06-13 | 2016-06-13 | Experimental device for be used for testing pressure transmission between drilling fluid and rock |
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| Publication Number | Publication Date |
|---|---|
| CN205982211U true CN205982211U (en) | 2017-02-22 |
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| CN201620578047.0U Active CN205982211U (en) | 2016-06-13 | 2016-06-13 | Experimental device for be used for testing pressure transmission between drilling fluid and rock |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107965310A (en) * | 2018-01-11 | 2018-04-27 | 中国海洋石油集团有限公司 | A kind of mud filtrate invasion depth test device and test method |
| CN108661626A (en) * | 2018-08-02 | 2018-10-16 | 西南石油大学 | Borehole wall water enchroachment (invasion) analogue experiment installation under a kind of high temperature and pressure |
| CN112730741A (en) * | 2020-12-18 | 2021-04-30 | 南通华兴石油仪器有限公司 | Simulation experiment system for rock fluid acting in reservoir |
| WO2022199701A1 (en) * | 2021-03-26 | 2022-09-29 | 中联煤层气国家工程研究中心有限责任公司 | Experimental apparatus for simulating substance exchange between wellbore and formation |
-
2016
- 2016-06-13 CN CN201620578047.0U patent/CN205982211U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107965310A (en) * | 2018-01-11 | 2018-04-27 | 中国海洋石油集团有限公司 | A kind of mud filtrate invasion depth test device and test method |
| CN108661626A (en) * | 2018-08-02 | 2018-10-16 | 西南石油大学 | Borehole wall water enchroachment (invasion) analogue experiment installation under a kind of high temperature and pressure |
| CN108661626B (en) * | 2018-08-02 | 2023-11-21 | 西南石油大学 | High-temperature high-pressure well wall water invasion simulation experiment device |
| CN112730741A (en) * | 2020-12-18 | 2021-04-30 | 南通华兴石油仪器有限公司 | Simulation experiment system for rock fluid acting in reservoir |
| WO2022199701A1 (en) * | 2021-03-26 | 2022-09-29 | 中联煤层气国家工程研究中心有限责任公司 | Experimental apparatus for simulating substance exchange between wellbore and formation |
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