CN110485999A - Simulation fracture module, slit formation drilling fluid leak stopping test device - Google Patents
Simulation fracture module, slit formation drilling fluid leak stopping test device Download PDFInfo
- Publication number
- CN110485999A CN110485999A CN201910568658.5A CN201910568658A CN110485999A CN 110485999 A CN110485999 A CN 110485999A CN 201910568658 A CN201910568658 A CN 201910568658A CN 110485999 A CN110485999 A CN 110485999A
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- groove
- fracture
- simulation fracture
- drilling fluid
- leak stopping
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Classifications
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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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices, or the like
-
- 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
Abstract
The invention discloses simulation fracture modules, slit formation drilling fluid leak stopping test device.The present invention relates to drilling fluid leak stopping measuring technologies, it include: two blocks of identical semicolumn components, two blocks of semicolumn components are detachably connected, a seal groove is provided between two semicolumn components, the two slat gum sealing strips for sealing are provided in seal groove, the crack section of simulation fracture module is rectangular groove, and groove is deep-shallow gradually transition in depth, and recess edge is provided with the graduation mark of the fracture width for indicating groove different location along the length direction of groove；The bottom of groove is provided with the artificial sand face of the rough surface for simulated formation rock fracture.Its fracture faces roughness that can simulate different lithology, after the completion of leaking stoppage experiment, opens simulation fracture module, can directly observe blocking layer blocking agent distributional pattern, rapidly and accurately measures fracture width and its plugging effect that leak stopping slurry or sealing agent match.
Description
Technical field:
The present invention relates to drilling fluid leak stopping measuring technology, in particular to simulation fracture module, slit formation drilling fluid leak stopping is surveyed
Trial assembly is set.
Background technique
In oil gas well drilling construction, it is frequently run onto the down hole problem of slit formation leakage, consumes expensive drilling fluid, edge
Long drilling period increases drilling cost.The blocking method of usually processing slit formation leakage is that various shape is added in drilling fluid
The inorganic or organic plugging material arranged in pairs or groups with granularity thickness, after leak stopping slurry carrying sealing agent leaks into stratum, wherein thick of rigidity
Grain bridge joint in crack forms blocking layer basis, in it is particles filled, fine grained blocks, and forms colmatation zone, the bentonite in drilling fluid
It is covered under filtration with heavy weight additive particle and forms more fine and close mud cake on colmatation zone, to prevent the leakage of drilling fluid
It loses.And the partial size of bridge formation particle must be matched with fracture width, partial size is excessively slightly meticulous to will cause leak stopping failure.Indoor leak stopping is real
It tests research and plugging effect evaluation is the key technology means for screening sealing agent and the science of field conduct bridge joint blocking construction
Basis.
Currently used slit formation plugging effect evaluation means are using QD-2 plugging material experimental rig.This leak stopping effect
Fruit evaluating apparatus is the crack that the quasi- different in width of man-made fracture seam template die of different slit widths is respectively adopted, because its fracture width is equal
Even, length only 5cm, and the material for simulating drop ply is steel, fracture surface is relatively smooth, with the sandstone of slit formation leakage, glutenite,
Mud stone rough surface differs greatly, cannot simulation fracture leakage well truth, when showing as leaking stoppage experiment, otherwise stifled
Agent forms false blocking in sealing into crack is not gone to, however blocking agent passes through crack and leak stopping fails, blocking agent cannot be reacted in crack
In stopping state, accurate evaluation is difficult to the plugging effect of sealing agent.
For this feature, Pu Xiaolin et al. by lengthen gap module length and inside modules paste different model and
The sand paper or sheet metal of shape change surface roughness, make its closer to practical fracture faces roughness, but its crack module
It is still fixed slit width, there are blocking agent or into crack is not gone to, blocks, or can't stand in crack, block up in crack oral area position vacation
The problem of leakage loses.
Summary of the invention:
The first purpose of this invention is to provide a kind of simulation fracture module, with fracture width gradual change, it is readable and
Roughness is adjustable, close to true crack seam face form the advantages of.
Second object of the present invention is to provide a kind of slit formation drilling fluid leak stopping test device, can simulate difference
The fracture faces roughness of lithology after the completion of leaking stoppage experiment, opens simulation fracture module, can directly observe blocking layer blocking agent distribution shape
State rapidly and accurately measures fracture width and its plugging effect that leak stopping slurry or sealing agent match.
To achieve the goals above, the present invention the following technical schemes are provided:
A kind of simulation fracture module, comprising: two blocks of identical semicolumn components, two blocks of semicolumn components are detachably connected,
It is provided with a seal groove between two semicolumn components, the two slat gum sealing strips for sealing are provided in seal groove, simulates
The crack section of crack module is rectangular groove, and groove is deep-shallow gradually transition in depth, and recess edge is along groove
Length direction is provided with the graduation mark of the fracture width for indicating groove different location；The bottom of groove is provided with for mould
The artificial sand face of the rough surface in quasi- formation rock crack.
Further, the width in crack includes the first gradual-change mode and the second gradual-change mode；
First gradual-change mode includes fracture width by 6mm gradual change to 1mm, and the gradient of groove floor is 0.70-0.75 °；
Second gradual-change mode includes fracture width by 10mm gradual change to 4mm, and the gradient of groove floor is 0.84-0.88 °.
Further, artificial sand face includes the varigrained rock particles Nian Jie with the bottom of groove, rock particles packet
Include one of quartz sand particle and limestone particle or two kinds.
Further, in the optional 20-40 mesh of the granularity of rock particles, 40-60 mesh, 60-100 mesh and 100-200 mesh
It is a kind of.
Further, artificial sand face thickness is 0.8-1.0mm.
Further, two blocks of semicolumn components are connected by positioning pin with screw rod.
A kind of slit formation drilling fluid leak stopping test device, comprising: pedestal, sleeve, socket cover, ball valve and above-mentioned simulation
Crack module；Pedestal is connect with ground, and pedestal is detachably connected with sleeve, and the both ends of sleeve top and bottom are connected to and form use
It is provided with top opening at the top of the formed between framework for accommodating test drilling fluid, sleeve and is detachably connected with socket cover, sleeve
Tops are provided with the shut-off valve being connected to formed between framework, and the shut-off valve other end is connected to by appendix with high pressure gas cylinder, cover
Cylinder bottom is provided with liquid outlet and is detachably connected with ball valve, and the one end of ball valve far from sleeve is connect with simulation fracture module.
Further, pedestal connect with bush whorl and uses screw lock；And/or socket cover and sleeve screw top connect
It connects.
Further, ball valve both ends are respectively arranged with the first internal screw thread and the second internal screw thread, and the outer wall of liquid outlet is provided with
With the first external screw thread of the first screw-internal thread fit and connect with the first internal screw thread, simulation fracture module is provided with and the second internal screw thread
Second external screw thread of cooperation is simultaneously connect with the second internal screw thread, and the second external screw thread and the second internal screw thread are provided with for sealing
Two sealing rings.
Further, further include spillage bucket and collect dress far from the filtrate that one end of ball valve is connect with simulation fracture module
It sets, Filtrate collection device is provided with filtrate collection port far from one end of simulation fracture module, and spillage bucket is as under filtrate collection port
End is for receiving spillage.
The invention has the following advantages that the fracture width gradual change of simulation fracture module provided in an embodiment of the present invention, readable
Adjustable with roughness, close to the seam face form in true crack, slit formation drilling fluid leak stopping test device includes above-mentioned simulation fracture
Module makes the plugging effect and the fracture width that matches of sealing agent of its measurement leak stopping slurry rapidly and accurately, is drilling fluid leak stopping
Agent preferably provides reliable experimental basis with waterproofing design, has highly important desk research and engineer application valence
Value.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of slit formation drilling fluid leak stopping test device of the invention；
Fig. 2 is the structural schematic diagram of simulation fracture module of the invention；
Fig. 3 is the cross-sectional view of simulation fracture module of the invention；
Fig. 4 is the cross-sectional view of simulation fracture module of the invention；
Fig. 5 is the cross-sectional view of simulation fracture module of the invention.
In figure: 100- simulation fracture module；101- sleeve；102- ball valve；103- socket cover；104- shut-off valve；105- high
Air bottle；106- spillage bucket；The second internal screw thread of 107-；108- tests drilling fluid；109- Filtrate collection device；110- rubber seal
Item；111- graduation mark；113- third external screw thread；The second external screw thread of 114-；116- connection component；117- semicolumn component.
Specific embodiment
The present invention will be further described with reference to the accompanying drawing, but protection scope of the present invention is not limited to following institute
It states.
As Figure 1-Figure 5, a kind of slit formation drilling fluid leak stopping test device, comprising: pedestal, sleeve 101, socket cover
103, ball valve 102 and simulation fracture module 100.A kind of simulation fracture module 100, comprising: two blocks of identical semicolumn components
117, in the present embodiment, 117 material of semicolumn component is that metal can also be plastics in other embodiments of the invention
Or inorganic material is made.In the present embodiment, two blocks of semicolumn components 117 by insertion positioning pin on connection component 116 and
Screw rod connection, in other embodiments of the invention, two blocks of semicolumn components 117 can also be other detachable connection methods into
Row connects, and is provided with a seal groove between two semicolumn components 117, is provided in seal groove close for two slat gums of sealing
Strip of paper used for sealing 110, the crack section of simulation fracture module 100 are rectangular groove, and groove is deep-shallow gradually transition in depth,
Recess edge is provided with the graduation mark 111 of the fracture width for indicating groove different location along the length direction of groove；It splits
Slit die block internal fissure can be divided into smooth metal face and simulate the rough rock degree surface of different lithology, the bottom setting of groove
There are the artificial sand face of the rough surface for simulated formation rock fracture, in better embodiment of the invention, artificial sand face
The bottom of groove is set to using bottom surface system of laying.
The width in crack includes the first gradual-change mode and the second gradual-change mode；First gradual-change mode include fracture width by
6mm gradual change to 1mm, the gradient of groove floor is 0.70-0.75 °；In the present embodiment, in the first gradual-change mode, groove floor
Gradient be 0.72 °, by taking fracture width is gradient to the module of 1mm by 6mm as an example, fracture width corresponding position carve 6mm,
After leaking stoppage experiment, according to blocking layer in the position of graduation mark 111, that is, leak stopping slurry or leak stopping can be read in 5mm, 4mm, 3mm, 2mm, 1mm
The matched fracture width of agent.
Second gradual-change mode includes fracture width by 10mm gradual change to 4mm, and the gradient of groove floor is 0.84-0.88 °, In
In the present embodiment, in the second gradual-change mode, the gradient of groove floor is 0.86 °.
Artificial sand face includes the varigrained rock particles Nian Jie with the bottom of groove, and rock particles includes quartz sand
Grain and one of limestone particle or two kinds.Artificial sand face thickness is 0.8-1.0mm.Rock particles and crack cross section
The combination of bottom portion of groove metal covering be to be bonded by Chemical Felter, specific method is uniformly smeared in bottom portion of groove metal covering
Chemical Felter, the then uniform spreading rock particles on Chemical Felter, and uniformly pressed with Steel Ruler, after its consolidation,
Clear away extra unconsolidated sand grains, this layer of grains of sand coating with a thickness of 1mm.
One of the optional 20-40 mesh of the granularity of rock particles, 40-60 mesh, 60-100 mesh and 100-200 mesh, respectively
Simulate the lithology such as gritstone, medium sandstone, fine sandstone, mud stone and limestone.
A kind of slit formation drilling fluid leak stopping test device, comprising: pedestal, sleeve 101, socket cover 103, ball valve 102 and
Simulation fracture module 100；Pedestal is connect with ground, and pedestal is detachably connected with sleeve 101, and the two of 101 top and bottom of sleeve
End is connected to and is formed 101 accommodating chamber of sleeve for accommodating test drilling fluid 108, is provided with top opening simultaneously at the top of sleeve 101
It is detachably connected with socket cover 103, the shut-off valve 104 being connected to 101 accommodating chamber of sleeve is provided at the top of socket cover 103, ended
104 other end of valve is connected to by appendix with high pressure gas cylinder 105, and 101 bottom of sleeve is provided with liquid outlet and removable with ball valve 102
Connection is unloaded, the one end of ball valve 102 far from sleeve 101 is connect with simulation fracture module 100.
Pedestal is threadedly coupled with sleeve 101 and uses screw lock；And/or socket cover 103 and 101 screw top of sleeve connect
It connects.
102 both ends of ball valve are respectively arranged with the first internal screw thread and the second internal screw thread 107, and the outer wall of liquid outlet is provided with and the
First external screw thread of one screw-internal thread fit is simultaneously connect with the first internal screw thread, and simulation fracture module 100 is provided with and the second internal screw thread
Second external screw thread 114 of 107 cooperations is simultaneously connect with the second internal screw thread 107, and the second external screw thread 114 is set with the second internal screw thread 107
It is equipped with the second sealing ring for sealing.
Further include spillage bucket 106 and is received with simulation fracture module 100 far from the filtrate that the threaded one end of ball valve 102 is connect
Acquisition means 109, Filtrate collection device 109 are provided with filtrate collection port, spillage bucket 106 far from one end of simulation fracture module 100
As for filtrate collection port lower end for receiving spillage.In the present embodiment, the one end of simulation fracture module 100 far from ball valve 102
It is provided with third external screw thread 113 and the internal screw thread realization of Filtrate collection device 109 is detachably connected.
In the present embodiment, with the simulation fracture module 100 of different roughness fracture faces, (gradual change width is gradient to by 6mm
Illustrate testing procedure for 1mm): the coke granule and rubber powder of experimental selection different meshes are plugging material, prepare leak stopping drilling well
Liquid；Simulation fracture module 100 is installed blending bolt to fix, one end of simulation fracture module 100 is connect with ball valve 102, separately
One end is connect with Filtrate collection device 109, and ball valve 102 is closed, and configured plugging drilling fluid is added, and covers socket cover 103,
Connection high pressure gas cylinder 105 is forced into 0.7MPa, and spillage bucket 106 is placed in filtrate collection port lower end, and in the present embodiment, pressure increases
Gradual pressurization, filtrate volume when follow-on test pressure increases to 6MPa from 0.7MPa are added as, detection parameters include instantaneous leakage
Amount, leakage total amount, blocking layer bearing capacity, blocking layer disruptive pressure and sealing agent match fracture width.
Wherein instantaneous wastage refers under 0.7MPa pressure, opens the mud amount of 102 moment of ball valve leakage, evaluates leak stopping
Starch the Forming ability of instantaneous blocking layer.
Leakage total amount starts timing after referring to opening ball valve 102, increases pressure to 6MPa (5min) according to 1MPa/min, tires out
The wastage of meter evaluates the compactness of blocking layer.
Blocking layer bearing capacity is finger pressure from during the pressure stabilizing of the boost process and 6MPa of 0.7MPa~6MPa, is not leaked
The case where vector amplifies suddenly, then it is assumed that bearing capacity >=6MPa evaluates the compression strength of blocking layer.
Blocking layer disruptive pressure refers in boost process, amplifies suddenly to some pressure wastage, then it is assumed that the pressure is stifled
The disruptive pressure of layer.In this case, the bearing capacity < disruptive pressure of blocking layer.
After sealing agent matching fracture width refers to leaking stoppage experiment, simulation fracture module 100 is opened, reads colmatation zone most
The average slit width that the width scale reading of front end, the as sealing agent can block.Test result is as follows shown in table one.Mould in table
Block type is crack module inner wall smooth degree, and smooth type is smooth metal wall surface, and 1 type is using 40-60 mesh rigidity rock
Grain simulation rock gap face, 2 types are 60-100 mesh rigidity rock particles simulation rock gap face.Block-up position is leak stopping material in table
Expect that colmatation zone caudal end is arrived that is, from gradual change simulation fracture width compared with big end in the position that colmatation zone is formed in simulation gap respectively
With the distance of front end.
The formula of above-mentioned plugging material are as follows: 3% coke A+2% coke B+2% coke C+2% coke D+2% coke E+3%
Rubber powder, wherein coke mesh number are as follows: A (4-6 mesh), B (6-10 mesh), C (10-20 mesh), D (20-40 mesh) and E (40-100 mesh).
One drilling fluid crack of table blocks performance test
It is above-mentioned the experimental results showed that, under the conditions of uniform pressure, crack roughness difference is affected to experiment effect, crack
The blocking layer analysis that inside is formed, which can be seen that smooth type and be formed by plugged zone fine particle content, to be decreased obviously, and is because stifled
Plug layer is not close in conjunction with smooth fracture surface, and fine grained penetrates colmatation zone, and accumulative wastage is caused to obviously increase.It is opposite coarse
Fracture surface can tangle many fine particles, keep leak stopping layer in connection close, blocking layer is finer and close, and plugging effect is more preferable.It can be more
Sealing characteristics of the true reaction sealing agent to formation fracture.The simulation fracture module 100 for using gradual change type simultaneously, can be clear
Reaction test plugging material System forming bridge blinding fracture width, can be achieved with a simulation fracture module 100 from 1mm-
The measurement of 6mm (or 4mm-10mm) fracture width range, without frequently replacing leak stopping as traditional leak stopping test device
Module, it is also cost-saved while improving working efficiency.
The invention has the following advantages that the fracture width gradual change of simulation fracture module 100 provided in an embodiment of the present invention, can
It reads and roughness is adjustable, close to the seam face form in true crack, slit formation drilling fluid leak stopping test device includes that above-mentioned simulation is split
Slit die block 100 makes the plugging effect and the fracture width that matches of sealing agent of its measurement leak stopping slurry rapidly and accurately, is drilling well
Liquid sealing agent preferably provides reliable experimental basis with waterproofing design, and there is highly important desk research to answer with engineering
With value.
Claims (10)
1. a kind of simulation fracture module, it is characterised in that: include: two blocks of identical semicolumn components, two pieces of semicolumn structures
Part is detachably connected, and is provided with a seal groove between two semicolumn components, is provided in the seal groove for sealing
Two slat gum sealing strips, the crack section of the simulation fracture module is rectangular groove, and the groove is in depth
Deep-shallow gradually transition, the recess edge are provided with along the length direction of the groove for indicating groove difference position
The graduation mark for the fracture width set；The bottom of the groove is provided with the artificial of the rough surface for simulated formation rock fracture
Sand face.
2. a kind of simulation fracture module according to claim 1, which is characterized in that the width in the crack includes first gradually
Change mode and the second gradual-change mode；
First gradual-change mode includes the fracture width by 6mm gradual change to 1mm, and the gradient of the groove floor is 0.70-
0.75°；
Second gradual-change mode includes the fracture width by 10mm gradual change to 4mm, and the gradient of the groove floor is 0.84-
0.88°。
3. a kind of simulation fracture module according to claim 1, which is characterized in that the artificial sand face include with it is described recessed
The varigrained rock particles of the bottom bonding of slot, the rock particles includes in quartz sand particle and limestone particle
It is one or two kinds of.
4. a kind of simulation fracture module according to claim 3, which is characterized in that the granularity of the rock particles is optional
One of 20-40 mesh, 40-60 mesh, 60-100 mesh and 100-200 mesh.
5. a kind of simulation fracture module according to claim 3, which is characterized in that the artificial sand face thickness is 0.8-
1.0mm。
6. a kind of simulation fracture module according to claim 3, which is characterized in that it is fixed that two blocks of semicolumn components pass through
Position pin is connected with screw rod.
7. a kind of slit formation drilling fluid leak stopping test device characterized by comprising pedestal, sleeve, socket cover, ball valve and
Simulation fracture module described in any one of claims 1-6;The pedestal is connect with ground, and the pedestal detachably connects with sleeve
It connects, the both ends of the sleeve top and bottom are connected to and form the formed between framework for accommodating test drilling fluid, the sleeve
Top is provided with top opening and is detachably connected with the socket cover, is provided at the top of the socket cover and accommodates with the sleeve
The shut-off valve of chamber connection, the shut-off valve other end are connected to by appendix with high pressure gas cylinder, and the sleeve bottom is provided with out
Liquid mouth is simultaneously detachably connected with the ball valve, and the one end of the ball valve far from the sleeve is connect with the simulation fracture module.
8. a kind of slit formation drilling fluid leak stopping test device according to claim 7, which is characterized in that the pedestal and institute
Bush whorl is stated to connect and use screw lock；And/or the socket cover is connect with the sleeve screw top.
9. a kind of slit formation drilling fluid leak stopping test device according to claim 7, which is characterized in that the ball valve both ends
It is respectively arranged with the first internal screw thread and the second internal screw thread, the outer wall of the liquid outlet is provided with and first screw-internal thread fit
First external screw thread is simultaneously connect with first internal screw thread, and the simulation fracture module is provided with and second screw-internal thread fit
Second external screw thread is simultaneously connect with second internal screw thread, and second external screw thread is provided with second internal screw thread for close
Second sealing ring of envelope.
10. a kind of slit formation drilling fluid leak stopping test device according to claim 7, which is characterized in that further include spillage
Bucket and the Filtrate collection device being connect with the simulation fracture module far from one end of the ball valve, the Filtrate collection device
One end far from the simulation fracture module is provided with filtrate collection port, and the spillage bucket is used as filtrate collection port lower end
In reception spillage.
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| CN201910568658.5A CN110485999B (en) | 2019-06-27 | 2019-06-27 | Simulation crack module, crack type drilling fluid leaking stoppage testing arrangement |
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| CN201910568658.5A CN110485999B (en) | 2019-06-27 | 2019-06-27 | Simulation crack module, crack type drilling fluid leaking stoppage testing arrangement |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111561281A (en) * | 2020-05-08 | 2020-08-21 | 中国海洋石油集团有限公司 | Drilling fluid leak protection leaking stoppage effect evaluation experiment system |
| CN112326886A (en) * | 2020-11-02 | 2021-02-05 | 四川省地质矿产勘查开发局四0三地质队 | Multi-mode test drilling leak stoppage test device and test method |
| WO2022099785A1 (en) * | 2020-11-11 | 2022-05-19 | 中国石油大学(北京) | Dynamic fracture plugging evaluation experiment apparatus and experiment method therefor |
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