CN203287373U - Long-core simulation water injection testing system - Google Patents
Long-core simulation water injection testing system Download PDFInfo
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- CN203287373U CN203287373U CN2013201936024U CN201320193602U CN203287373U CN 203287373 U CN203287373 U CN 203287373U CN 2013201936024 U CN2013201936024 U CN 2013201936024U CN 201320193602 U CN201320193602 U CN 201320193602U CN 203287373 U CN203287373 U CN 203287373U
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Abstract
The utility model provides a long-core simulation water injection testing system, which comprises a long-core clamp holder, a pressure pump connected with and applying confining pressure and axial pressure for the long-core clamp holder, and a displacement pump, a manometer, and a back pressure pump connected with the long-core clamp holder respectively, wherein the long-core clamp holder comprises a clamp holder cylinder body (1) and a high pressure resistant rubber sleeve (2) sleeved in the clamp holder cylinder body (1); the high pressure resistant rubber sleeve (2) comprises a cylinder wall (21), an inner chamber (23) in the cylinder wall (21), and cylinder openings positioned at two ends of the inner chamber (34), the inner chamber (23) is vertically cylindrical, and inside diameters of the cylinder openings at two ends are equal to the inside diameter of the middle of the inner chamber (23). The system can conduct multi-pressure detecting point detection in the axial direction for a long-core, and therefore, the end face effect is low, the dead volume is small, the static confining pressure is high, and the measurement error is small.
Description
Technical field
The utility model relates to the petroleum prospecting detection field, is specifically related to a kind of long rock core simulation flood-pot-test system.
Background technology
Rock core simulation water filling device commonly used mainly divides short rock core and two kinds of systems of long rock core at present; although adopt the sensitivity characteristic that conventional short rock core can the Fast Evaluation reservoir; and can effectively carry out the preferred and research of reservoir protection technology in the injecting process; but because the length of the short rock core of routine is too short, the hydration and expansion of clay in can't accurate response reservoir the injecting process and process and the feature of migration.In order further to study the reservoir damage mechanism in the injecting process; on the basis of the dynamically anti-swollen experiment of the short rock core of routine; set up the experimental technique of long rock core analogue means and long rock core simulation water filling, carried out long rock core simulation water filling reservoir damage and Protection research.But there is following defect in the conventional long rock core device of multipoint pressure measure: 1, clean confined pressure is low, and the rock core specification of long rock core device commonly used is Φ 25mm*300mm, can carry out two pressure tap tests.But the bearing capacity of its gum cover is low, requires less than 4MPa, the burden pressure under can't simulation stratum condition.2, dead volume is large, dead volume (or dead volume) is to export to clamper from the clamper entrance, the volume that all interface channels occupy, the connected volume that mainly comprises pipeline, plug, joint and valve, be distributed in the clamper entrance and export to rock core rear end face and rock core pressure tap to the volume in the connection line of sensor to rock core front end face, clamper.Active volume refers in gum cover hold the volume of long rock core, namely equals the volume of long rock core.
Dead volume be in flow process due to requirements such as mechanical processing technique, mounting process, overload protections, inevitable additional volume.Dead volume has a significant impact the measuring accuracy of system, response time, response speed etc.Due to the length that has increased test point and gum cover and rock core, to compare with the test of short rock core, the dead volume of existing long rock core device has increased several times, and the active volume proportion is less, and for the experiment of accurate measurement, the impact that its error causes is larger.Therefore, existing rock core simulation water filling device needs further improvement and improves.
In addition, existing triaxial core holder, the packing element shape is all columniform, from adding the division of confined pressure mode, two kinds of methods is arranged, and a kind of is axially and radially to pressurize simultaneously, and axially identical with radial pressure, and another kind is axial and radially can adds respectively confined pressure.So to axially and radially can add respectively the core holding unit of confined pressure, the seal form of packing element and rock core end face is all generally that the convex structure (is that the bore at packing element two ends is greater than interlude, perhaps two ends are enlarging), the major defect of this sealing means is: 1. because the gum cover two ends that require of structure and processing technology must convex, this part gum cover of projection has increased the dead volume of clamper front and back end, the response speed of oil-water metering precision and system in the impact experiment.2. because the gum cover jut has flex point, when displacement pressure and confined pressure pressure reduction were large, gum cover, from the inside crimp of flex point, easily leaked, so experiment pressure reduction is not high.
The utility model content
The utility model provides a kind of long rock core simulation flood-pot-test system,, to improve test accuracy, provides the experimental data of accurate measurement.
For this reason, the utility model proposes a kind of long rock core simulation flood-pot-test system, described long rock core simulation flood-pot-test system comprises: long core holding unit, the displacement pump, measuring cell and the backpressure pump that are connected with described long core holding unit and described long core holding unit is applied the force (forcing) pump of confined pressure and axle pressure and is connected with described long core holding unit respectively;
Described long core holding unit comprises: clamper cylindrical shell 1 and the high pressure resistant rubber bush 2 that is sheathed within described clamper cylindrical shell 1, and the space between described clamper cylindrical shell 1 and described high pressure resistant rubber bush 2 is the confined pressure chamber; This long core holding unit is triaxial core holder, and radially confined pressure is arranged, and also has axial confined pressure.
Described high pressure resistant rubber bush 2 comprises: barrel 21, the nozzle that is arranged in the inner chamber 23 of described barrel 21 and is positioned at described inner chamber 23 two ends, and described inner chamber 23 is straight tube shape, the internal diameter of the tube port position at described two ends equals the internal diameter of locating in the middle of described inner chamber 23;
Described high pressure resistant rubber bush 2 also comprises:
Skirt shape outer rim 221, be arranged on described sleeve flange 22 end away from this described nozzle; Described skirt shape outer rim 221 acutangulates with the axes intersect of described high pressure resistant rubber bush 2;
The madial wall at described clamper cylindrical shell 1 two ends encircles respectively establishes front end boss 13 and rear end boss 14;
Described skirt shape outer rim 221 compresses mutually with described front end boss 13 and rear end boss 14, upwards seals up described confined pressure chamber from footpath.
Further, described skirt shape outer rim 221 is taper or conical ring.
Further, described skirt shape outer rim 221 compresses with described front end boss 13 and rear end boss 14 mutually by the inwall of skirt shape outer rim 221.
Further, described long core holding unit comprises: the front end plug 3 and the rear end plug 4 that are arranged on respectively the tube port position at described two ends.
Further, described front end plug 3 comprises: the plug connecting portion 32 of connecting on pipeline 31 and pipeline and plug end 33; Described plug end 33 extend in the nozzle of front end, and the external diameter of described plug end 33 equals the internal diameter of the tube port position at described two ends.
Further, the middle shaft position of described rear end plug 4 has the pipeline 41 that flows for gas-liquid, and the middle part of described rear end plug 4 has collar flange 42; Described rear end plug 4 has the insertion section 43 that is positioned at before described collar flange 42, described insertion section 43 extend in the nozzle of rear end, the external diameter of described insertion section 43 equals the internal diameter of the tube port position at described two ends, is provided with seal groove 421 and O-ring seal 422 on described collar flange 42; The external diameter of described collar flange 42 is greater than the external diameter of described insertion section 43.
Further, the thickness of described barrel 21 is 10～10.6mm; Internal diameter is 2.54-3.81cm, and described sleeve flange 22 wall thickness are 14.9～15.3mm, and length is 15.1～15.5mm, and the width of described skirt shape outer rim 221 is 15.1～15.5mm.
Further, the axial length of the front end plug 3 of described long core holding unit is 5-10cm, and the axial length of described rear end plug 4 is 10-15cm.
Further, described long rock core simulation flood-pot-test system also comprises: computer data acquiring control system, described computer data acquiring control system are connected with displacement pump, measuring cell and backpressure pump that described force (forcing) pump, described long core holding unit are connected respectively.
Further, the barrel of described long core holding unit 1 is provided with inlet, liquid outlet, confined pressure entrance 16 and at least two pressure tap joints.
in long rock core simulation flood-pot-test system of the present utility model, high pressure resistant rubber bush is different from conventional gum cover, the internal diameter of the tube port position at conventional gum cover two ends is greater than the internal diameter at place in the middle of inner chamber, because the internal diameter of clamper cylindrical shell 1 is determined, space between clamper cylindrical shell 1 and described high pressure resistant rubber bush 2, the radial dimension that is confined pressure chamber 9 has restriction, in the finite space in confined pressure chamber, limited by the internal diameter of the tube port position at conventional gum cover two ends, the wall thickness of conventional gum cover can only be limited in less scope, and in the utility model, the inner chamber 23 of high pressure resistant rubber bush is straight tube shape, the internal diameter of the tube port position at two ends equals the internal diameter of locating in the middle of described inner chamber 23, therefore, the wall thickness of high pressure resistant rubber bush can be broken through the internal diameter of tube port position at conventional gum cover two ends greater than the restriction of the internal diameter at place in the middle of inner chamber, as long as in the middle of inner chamber 23, the wall thickness at place does not affect the finite space in confined pressure chamber, the wall thickness of high pressure resistant rubber bush can be more more abundant than existing conventional gum cover, can bear larger pressure.And the straight tube shape structure of inner chamber 23 makes sleeve flange 22 become the spirogyrate structure from the concave shaped structure, and like this, the sleeve flange 22 that docks with the plug at sleeve 2 two ends just can occupy less space, thereby gum cover barrel 21 can be thickeied.
The utility model improves on hermetically-sealed construction, make the clamper dead volume little, and experiment pressure reduction is high.Gum cover seal face of the present utility model place does not have projection, inner chamber is straight tube shape, the internal diameter of the tube port position at described two ends equals the internal diameter of locating in the middle of described inner chamber, there do not is flex point of the prior art, when even displacement pressure and confined pressure pressure reduction are large, not there will be the inside crimp of gum cover yet, do not allow leakiness, experiment pressure reduction thereby can improve.
And then the front end plug 3 of long core holding unit and rear end plug 4 all extend in the nozzle of high pressure resistant rubber bush 2, and the axial and radial dimension of front end plug 3 and rear end plug 4 can be reduced.Like this, the more conventional long core holding unit in the aperture of front end plug 3 and rear end plug 4 has reduced 60%, clamper total length thereby shortened 15%.This gum cover can bear pressure 60MPa, differential static pressure 20MPa.Simultaneously, the more conventional gum cover nozzle of the nozzle length length of gum cover is short, makes the total length of gum cover shorten 10%, thereby has reduced dead volume.
Long rock core simulation flood-pot-test system of the present utility model is used for the reservoir damage mechanism of research the injecting process, effectively disclose in long rock core the injecting process along the journey damage character, and for the anti-swollen radius of sensitive reservoir and prevent the swollen cycle determine to provide theory and experimental basis.This system can long rock core vertically many pressure taps detect, effect of end surface is low, dead volume is little, quiet confined pressure is large, error in dipping is little.
Description of drawings
Fig. 1 is that in figure, dotted line represents the connection of computer data acquiring control system according to the one-piece construction schematic diagram of the long rock core simulation flood-pot-test system of the utility model embodiment, and solid line represents the connection of displacement system;
Fig. 2 is the longitudinal profile structural representation according to the long core holding unit of the utility model embodiment;
Fig. 3 a is the structural representation according to the front end plug of the long core holding unit of the utility model embodiment;
Fig. 3 b is the structural representation according to the front end set collar of the long core holding unit of the utility model embodiment;
Fig. 3 c is the structural representation according to the front end cylindrical shell of the long core holding unit of the utility model embodiment;
Fig. 4 is sectional structure schematic diagram vertical according to the high pressure resistant rubber bush of the utility model embodiment;
Fig. 5 is the structure according to the sleeve flange of the utility model embodiment and skirt shape outer rim;
Fig. 6 a is the structural representation according to the rear end cylindrical shell of the long core holding unit of the utility model embodiment;
Fig. 6 b is the structural representation according to rear end first set collar of the long core holding unit of the utility model embodiment;
Fig. 6 c is the structural representation according to the rear end plug of the long core holding unit of the utility model embodiment;
Fig. 6 d is the structural representation according to rear end second set collar of the long core holding unit of the utility model embodiment;
Fig. 7 is the high pressure resistant rubber bush structural representation that existing routine is used for long core holding unit.
Embodiment
Understand for technical characterictic of the present utility model, purpose and effect being had more clearly, now contrast description of drawings embodiment of the present utility model.
As shown in Figure 1, long rock core simulation flood-pot-test system comprises: long core holding unit I, the displacement pump III (displacement pump III forms the displacement system by connection) that is connected with described long core holding unit I and described long core holding unit is applied the force (forcing) pump II of confined pressure and axle pressure and is connected with described long core holding unit I respectively, backpressure pump IV and measuring cell V;
As shown in Figure 2, described long core holding unit comprises: clamper cylindrical shell 1 and the high pressure resistant rubber bush 2 that is sheathed within described clamper cylindrical shell 1, space between described clamper cylindrical shell 1 and described high pressure resistant rubber bush 2 is the confined pressure chamber, particularly, clamper cylindrical shell 1 inwall, front end boss 13, rear end boss 14 and high pressure resistant rubber bush 2 outer walls form ring-type confined pressure chamber 9;
described high pressure resistant rubber bush 2 comprises: barrel 21, the nozzle that is arranged in the inner chamber 23 of described barrel 21 and is positioned at described inner chamber 23 two ends, described inner chamber 23 is straight tube shape, rock core 8 is arranged in inner chamber 23, the nozzle at two ends is blocked rock core 8 with plug respectively, and the internal diameter of the tube port position at described two ends equals the internal diameter of locating in the middle of described inner chamber 23, high pressure resistant rubber bush of the present utility model is different from conventional gum cover, as Fig. 7, the internal diameter of the tube port position at conventional gum cover 200 two ends is greater than the internal diameter at place in the middle of inner chamber 230, be that conventional gum cover two ends have enlarging 280, because the internal diameter of clamper cylindrical shell is determined, space between clamper cylindrical shell and described high pressure resistant rubber bush, the radial dimension that is the confined pressure chamber has restriction, in the finite space in confined pressure chamber, limited by the internal diameter of the tube port position at conventional gum cover two ends, sidewall 210 wall thickness of conventional gum cover can only be limited in less scope, and in the utility model, the inner chamber 23 of high pressure resistant rubber bush is straight tube shape, the internal diameter of the tube port position at two ends equals the internal diameter of locating in the middle of described inner chamber 23, therefore, the wall thickness of high pressure resistant rubber bush can be broken through the internal diameter of tube port position at conventional gum cover two ends greater than the restriction of the internal diameter at place in the middle of inner chamber, as long as in the middle of inner chamber 23, the wall thickness at place does not affect the finite space in confined pressure chamber, the wall thickness of high pressure resistant rubber bush can be more more abundant than existing conventional gum cover, can bear larger pressure.Simultaneously, the more conventional gum cover nozzle of the nozzle length length of gum cover is short, the total length of gum cover is shortened, thereby reduced dead volume;
Described high pressure resistant rubber bush 2 also comprises:
As shown in Figure 2 and Figure 4, skirt shape outer rim 221, be arranged on described sleeve flange 22 end away from this described nozzle; Described skirt shape outer rim 221 acutangulates with the axes intersect of described high pressure resistant rubber bush 2, perhaps, the opening direction of skirt shape outer rim 221 and this end nozzle towards the opposite, the two ends of high pressure resistant rubber bush 2 are not always the case; For example, in Fig. 2, the opening direction of the skirt shape outer rim 221 of left end is towards right (visible Fig. 4 and Fig. 5); And the nozzle of left end towards being towards a left side; The opening direction of the skirt shape outer rim 221 of right-hand member is towards left (visible Fig. 4 and Fig. 5); And the nozzle of right-hand member towards being towards the right side; The both Packed effects of this structure of skirt shape outer rim 221, positioning action is arranged again, and sealing effectiveness is better;
As Fig. 3 c, the madial wall at described clamper cylindrical shell 1 two ends encircles respectively establishes front end boss 13 and rear end boss 14, and front end boss 13 and rear end boss 14 are all radially inwardly outstanding;
Described skirt shape outer rim 221 compresses mutually with described front end boss 13 and rear end boss 14, upwards seals up described confined pressure chamber from footpath.Clamper cylindrical shell 1 inwall, front end boss 13, rear end boss 14 and high pressure resistant rubber bush 2 outer walls form ring-type confined pressure chamber 9, and while adding confined pressure, skirt shape outer rim 221 is close to front end boss 13 and rear end boss 14 under pressure, has strengthened sealing function.Further, described skirt shape outer rim 221 is taper or conical ring, so that better sealing.
And then, gum cover seal face of the present utility model place does not have projection, in other words, the gum cover seal face is flat, and inner chamber is straight tube shape, the internal diameter of the tube port position at described two ends equals the internal diameter of locating in the middle of described inner chamber, there do not is flex point of the prior art,, even when displacement pressure and confined pressure pressure reduction are large, not there will be the inside crimp of gum cover yet, do not allow leakiness, experiment pressure reduction thereby can improve.
Further, described skirt shape outer rim 221 compresses with described front end boss 13 and rear end boss 14 mutually by the inwall of skirt shape outer rim 221, and sealing effectiveness is better.Further, the width of described skirt shape outer rim 221 is 15.1～15.5mm, can realize reducing dead volume under the condition that keeps better sealing effectiveness.
Further, as Fig. 2, described long core holding unit comprises: be arranged on respectively front end plug 3 and the rear end plug 4 of the tube port position at described two ends, to realize the sealing at rock core 8 two ends.The front end plug 3 of long core holding unit and rear end plug 4 all extend in the nozzle of high pressure resistant rubber bush 2, and the axial and radial dimension of front end plug 3 and rear end plug 4 can be reduced.Like this, the more conventional long core holding unit in the aperture of front end plug 3 and rear end plug 4 has reduced 60%, clamper total length thereby shortened 15%.
Further, as Fig. 3 a, described front end plug 3 comprises: the plug connecting portion 32 of connecting on pipeline 31 and pipeline and plug end 33; Described plug end 33 extend in the nozzle of front end, and the external diameter of described plug end 33 equals the internal diameter of the tube port position at described two ends.Pipeline 31 is communicated to the left side of rock core, is inlet and outlet piping or the displacement passage of displacement.The shape of the outer shape of plug end 33 and high pressure resistant rubber bush 2 inner chambers 23 is coincide, and it inserts in inner chamber 23 and its end face is supported on the end face of rock core 8.Like this, can reduce the axial and radial dimension of front end plug 3.
Further, as Fig. 6 c, the middle shaft position of described rear end plug 4 has the pipeline 41 that flows for gas-liquid, and pipeline 41 is communicated to the right side of rock core, is inlet and outlet piping or the displacement passage of displacement; The middle part of described rear end plug 4 has collar flange 42; Described rear end plug 4 has the insertion section 43 that is positioned at before described collar flange 42, described insertion section 43 extend in the nozzle of rear end, the external diameter of described insertion section 43 equals the internal diameter of the tube port position at described two ends, is provided with seal groove 421 and O-ring seal 422 on described collar flange 42; The external diameter of described collar flange 42 is greater than the external diameter of described insertion section 43.The internal diameter shape of the set collar link 62 of collar flange 42 outer shape and the first set collar is coincide.The outer shape of rear end plug 4 front portions (being insertion section 43) and the inner chamber of high pressure resistant rubber bush 2 23 coincide.Like this, can reduce the axial and radial dimension of rear end plug 4, be convenient to sealing.
Further, the axial length of high pressure resistant rubber bush 2 is 25.0～35.0cm, because inner chamber 23 is straight tube shape, so the axial length of inner chamber 23 is 25.0～35.0cm; The thickness of described barrel 21 is 10～10.6mm; Internal diameter is 2.54-3.81cm, and described sleeve flange 22 wall thickness are 14.9～15.3mm, and length is 15.1～15.5mm, and the width of described skirt shape outer rim 221 is 15.1～15.5mm.Further, the axial length of front end plug 3 is 5-10cm, and the axial length of described rear end plug 4 is 10-15cm, and the diameter of the pipeline 31 of front end plug 3 is 0.5-2mm, and the diameter of the pipeline 41 of described rear end plug 4 is 0.5-2mm.This gum cover can bear pressure 60MPa, differential static pressure 20MPa.Simultaneously, the more conventional gum cover nozzle of the nozzle length length of gum cover is short, makes the total length of gum cover shorten 10%, clamper total length thereby shortened 15%, the plug of clamper rear and front end and the aperture of joint are more conventional has reduced 60%, has further reduced dead volume.
Further, as Fig. 1, described long rock core simulation flood-pot-test system also comprises: computer data acquiring control system VI (abbreviation data acquisition system (DAS)), described computer data acquiring control system VI is connected with displacement pump, measuring cell and backpressure pump that described force (forcing) pump, described long core holding unit are connected respectively.By computer data acquiring control system VI can long rock core vertically many pressure taps detect, measure accurately, fast, data are comprehensive, error in dipping is little.
Further, as Fig. 1 and Fig. 2, the barrel of described long core holding unit 1 is provided with inlet, liquid outlet, confined pressure entrance 16 and at least two pressure tap joints (for example being pressure tap joint 151 and pressure tap joint 152).Also be provided with axle pressure entrance 63 on the barrel of long core holding unit 1.Confined pressure entrance 16 is connected and all with force (forcing) pump II, is connected with the axle pressure entrance, to realize axle pressure and confined pressure, by same pump, is loaded; Inlet, liquid outlet and confined pressure entrance 16 arrange respectively measuring cell V, to measure.
Below introduce more specifically syndeton and principle of work and the process of the embodiment of a long rock core simulation flood-pot-test system:
As shown in Figure 1, long rock core simulation flood-pot-test system comprises long core holding unit I, force (forcing) pump II, displacement pump III, backpressure pump IV, measuring cell V, and computer data acquiring control system VI.The chief component of its equipment and performance parameter are in Table 1.
Table 1
As shown in Figure 2, long core holding unit comprises clamper cylindrical shell 1, high pressure resistant rubber bush 2, front end plug 3, rear end plug 4, front end set collar 5, rear end the first set collar 6 and rear end the second set collar 7.
As shown in Fig. 2, Fig. 3 a, Fig. 3 b, Fig. 3 c and Fig. 6 a, Fig. 6 b, Fig. 6 c and Fig. 6 d, clamper cylindrical shell 1 is cylindrical shape, and wherein flange is established apart from 3.0cm place, nozzle edge ring in left end barrel inboard, is front end boss 13; Flange is established apart from 3.0cm place, nozzle edge ring in right-hand member barrel inboard, is rear end boss 14; As Fig. 3 c, this front end boss 13 to nozzle marginal portion is front plug interface 11, and as Fig. 6 a, rear end boss 13 to nozzle marginal portion is rear plug interface 12; The barrel inboard of front plug interface 11 and rear plug interface 12 parts arranges respectively internal thread 111 and internal thread 121; Confined pressure entrance 16 and at least two pressure tap joints are set on the barrel of clamper cylindrical shell 1, are respectively pressure tap joint 151 and pressure tap joint 152.
As Fig. 2, shown in Figure 4 and Figure 5, high pressure resistant rubber bush 2 is cylinders that rubber is made, the thickness of barrel 21 is 10.6mm, encircle respectively on the outer wall of two ends nozzle and establish sleeve flange 22 (being called for short flange 22), the barrel thickness at flange 22 places is 15.15mm, and the axial length of flange portion is 15.5mm.Establish skirt shape outer rim 221 at this flange away from an end ring of nozzle, the opening direction of this outer rim 221 and this flange 22 towards the opposite, the width of skirt shape outer rim 221 is 15.5mm.At least two pressure measurement interfaces, pressure measurement interface 211 and pressure measurement interface 212 are set on barrel 21; Hold rock core 8 in inner chamber 23; The axial length of this inner chamber 23 is 34.94cm, and internal diameter is 2.57cm.
High pressure resistant rubber bush 2 is positioned in clamper cylindrical shell 1, and the outer wall of its two end boss 22 fits tightly with the front end boss 13 of clamper cylindrical shell and the medial surface of rear end boss 14 respectively; Both sides skirt shape outer rim 221 is stretched in respectively this front end boss 13 and rear end boss 14 side towards the clamper inner barrel; Form ring-type confined pressure chamber 9 by clamper cylindrical shell 1 inwall, front end boss 13, rear end boss 14 and high pressure resistant rubber bush 2 outer walls.
As shown in Fig. 3 a, front end plug 3 comprises plug connecting portion 32 and the plug end 33 of connecting on pipeline 31 and pipeline; On plug connecting portion 32 outer walls, external thread 321 is set.As shown in Figure 2, the shape of the outer shape of plug end 33 and high pressure resistant rubber bush 2 inner chambers 23 is coincide, and it inserts in inner chamber 23 and its end face (right side of plug end 33) is supported on the end face of rock core 8.The axial length of front end plug 3 is 6.1cm.The diameter of pipeline 31 (internal diameter) is 1.5mm.
As shown in Fig. 3 b, front end set collar 5 comprises plug link 51 and front end cylindrical shell link 52; Internal thread 511 is set on the inwall of this plug link 51, with the external thread 321 on plug connecting portion 32, is spirally connected.As shown in Figure 2, on the outer wall of front end cylindrical shell link 52, external thread 521 is set, with the internal thread 111 on front plug interface 11, is spirally connected; The end face of this front end cylindrical shell link 52 is supported on the end face of high pressure resistant rubber bush 2.
As shown in Figure 6 b, rear end the first set collar 6 comprises rear end cylindrical shell link 61 and set collar link 62, is used for fixedly front end plug 3 and rear end plug 4; On the outer wall of this rear end cylindrical shell link 61, external thread 611 is set, with the internal thread 121 on rear plug interface 12, is spirally connected.Axle pressure entrance 63 is set on the outer wall of set collar link 62; At least three screws 621 are set on the end face of set collar link 62.As shown in Figure 2, the end face of rear end cylindrical shell link 61 is supported on the end face of high pressure resistant rubber bush 2.
As shown in Fig. 6 c, the axis of rear end plug 4 has the pipeline 41 that flows for gas-liquid, and the diameter of pipeline 41 is 0.15cm.The middle part of rear end plug 4 has collar flange 42, and collar flange 42 pressed on rings are established seal groove 421.The internal diameter shape of the set collar link 62 of collar flange 42 outer shape and the first set collar is coincide.The outer shape of rear end plug 4 front portions 43 and the inner chamber of high pressure resistant rubber bush 2 23 coincide, and with the internal diameter shape of the rear end cylindrical shell link 61 of the first set collar, coincide.As shown in Figure 2, rear end plug 4 passes rear end the first set collar 6, the end face of its front portion 43 is supported on the end face of rock core 8, and the outer wall of its front portion 43 and collar flange 42 fits tightly with the rear end cylindrical shell link 61 of the first set collar 6 and the inwall of set collar link 62 respectively; As Fig. 2, the interior O-ring seal 422 that arranges of the seal groove 421 on collar flange 42.The axial length of rear end plug 4 is 15cm.
As shown in Fig. 6 d, the internal diameter shape of rear end the second set collar 7 and rear portion 44 outer shape of rear end plug are coincide; At least three screws 72 are set on the end face of rear end the second set collar 7, and its position is corresponding with the screw 621 on the first set collar of rear end respectively.As shown in Figure 2, rear end the second set collar 7 is set in the periphery of rear end plug 4, and O-ring seal 73 is set between the two.The screw 72 that is located in 621 of screw 72 on the second set collar of rear end and the screws on the set collar link is fixed on rear end the second set collar 7 on the first set collar 6 of rear end.Form section roller to pressure chamber 10 between outer wall, collar flange 42 and rear end second set collar 7 at the rear portion 44 of the inwall of clamper cylindrical shell 1, rear end plug.
The front and back ends plug is taken out from long core holding unit, and be full of water in the passage that the front and back ends plug is shared, the volume of measuring water is the dead volume of front and back ends plug.The long core holding unit front end of measurement result dead volume is 400mm
3, the rear end dead volume is 370mm
3, be only 20% of conventional long core holding unit.The highest quiet confined pressure is 20MPa, and working pressure is 0-60MPa.
The long rock core that this long core holding unit can hold Φ 25mm*300mm carries out various simulation flood-pot-tests, and it can carry out many pressure taps detections vertically, and effect of end surface is low, dead volume is little, quiet confined pressure is large, and error in dipping is little.
(3) System Working Principle
The three suffered 3-D stree fields of axial hydrostatic confined pressure simulation reservoir that this system utilizes force (forcing) pump II to provide, endpiece adds back pressure, simulated formation pressure.The employing of simulation flood-pot experiment is found time saturated online, according to different long rock core features, determines different displacement working fluids.Concrete implementation procedure is as follows:
(1) normal temperature constant weight after the rock core drying, take dry weight, calculates each endpiece dead volume of clamper;
(2) the filling rock core, survey air permeability;
(3) the operate in saturation liquid (different rock core characteristics adopt different operating liquid) of finding time online, and calculate the volume of voids Vp of long rock core;
(4) carry out liquid with working fluid and survey the permeability test;
(5) carry out water filling dynamic experiment (comprising water-sensitive experiment, anti-swollen experiment and anti-swollen cycle experiment etc.) according to different long core experiment schemes;
(6) weigh the rock core weight in wet base after having tested, and the related experiment data are processed and analyzed.
The utility model is used for the reservoir damage mechanism of research the injecting process, effectively disclose in long rock core the injecting process along the journey damage character, and for the anti-swollen radius of sensitive reservoir and prevent the swollen cycle determine to provide theory and experimental basis.The utility model can long rock core vertically many pressure taps detect, effect of end surface is low, dead volume is little, quiet confined pressure is large, error in dipping is little.
The foregoing is only the schematic embodiment of the utility model, not in order to limit scope of the present utility model.For each ingredient of the present utility model can make up mutually under the condition of not conflicting; any those skilled in the art; the equivalent variations of having done under the prerequisite that does not break away from design of the present utility model and principle and modification, all should belong to the scope that the utility model is protected.
Claims (10)
1. one kind long rock core is simulated the flood-pot-test system, it is characterized in that, described long rock core simulation flood-pot-test system comprises: long core holding unit, the displacement pump, measuring cell and the backpressure pump that are connected with described long core holding unit and described long core holding unit is applied the force (forcing) pump of confined pressure and axle pressure and is connected with described long core holding unit respectively;
Described long core holding unit comprises: clamper cylindrical shell (1) and be sheathed on high pressure resistant rubber bush (2) within described clamper cylindrical shell (1), and the space between described clamper cylindrical shell (1) and described high pressure resistant rubber bush (2) is the confined pressure chamber;
Described high pressure resistant rubber bush (2) comprising: barrel (21), be arranged in the inner chamber (23) of described barrel (21) and the nozzle that is positioned at described inner chamber (23) two ends, described inner chamber (23) is straight tube shape, and the internal diameter of the tube port position at described two ends equals the internal diameter of locating in the middle of described inner chamber (23);
Described high pressure resistant rubber bush (2) also comprises:
Sleeve flange (22), give prominence to the barrel (21) in the outside of the nozzle that is arranged on each end and locate;
Skirt shape outer rim (221), be arranged on the upper end away from this described nozzle of described sleeve flange (22); Described skirt shape outer rim (221) acutangulates with the axes intersect of described high pressure resistant rubber bush (2);
The madial wall at described clamper cylindrical shell (1) two ends encircles respectively establishes front end boss (13) and rear end boss (14);
Described skirt shape outer rim (221) compresses mutually with described front end boss (13) and rear end boss (14), upwards seals up described confined pressure chamber from footpath.
2. long rock core simulation flood-pot-test system as claimed in claim 1, is characterized in that, described skirt shape outer rim (221) is taper or conical ring.
3. long rock core simulation flood-pot-test system as claimed in claim 2, is characterized in that, described skirt shape outer rim (221) compresses with described front end boss (13) and rear end boss (14) mutually by the inwall of skirt shape outer rim (221).
4. long rock core simulation flood-pot-test system as claimed in claim 1, is characterized in that, described long core holding unit comprises: the front end plug (3) and the rear end plug (4) that are arranged on respectively the tube port position at described two ends.
5. long rock core simulation flood-pot-test system as claimed in claim 4, is characterized in that, described front end plug (3) comprising: the plug connecting portion (32) of connecting on pipeline (31) and pipeline and plug end (33); Described plug end (33) extend in the nozzle of front end, and the external diameter of described plug end (33) equals the internal diameter of the tube port position at described two ends.
6. long rock core as claimed in claim 4 is simulated the flood-pot-test system, it is characterized in that, the middle shaft position of described rear end plug (4) has the pipeline (41) that flows for gas-liquid, and the middle part of described rear end plug (4) has collar flange (42); Described rear end plug (4) has and is positioned at described collar flange (42) insertion section (43) before, described insertion section (43) extend in the nozzle of rear end, the external diameter of described insertion section (43) equals the internal diameter of the tube port position at described two ends, is provided with seal groove (421 and O-ring seal (422) on described collar flange (42); The external diameter of described collar flange (42) is greater than the external diameter of described insertion section (43).
7. long rock core simulation flood-pot-test system as claimed in claim 2, is characterized in that, the thickness of described barrel (21) is 10～10.6mm; Internal diameter is 2.54-3.81cm, and described sleeve flange (22) wall thickness is 14.9～15.3mm, and length is 15.1～15.5mm, and the width of described skirt shape outer rim (221) is 15.1～15.5mm.
8. long rock core simulation flood-pot-test system as claimed in claim 4, is characterized in that, the axial length of the front end plug (3) of described long core holding unit is 5-10cm, and the axial length of described rear end plug (4) is 10-15cm.
9. long rock core as claimed in claim 1 is simulated the flood-pot-test system, it is characterized in that, described long rock core simulation flood-pot-test system also comprises: computer data acquiring control system, described computer data acquiring control system are connected with displacement pump, measuring cell and backpressure pump that described force (forcing) pump, described long core holding unit are connected respectively.
10. long rock core simulation flood-pot-test system as claimed in claim 1, is characterized in that, the barrel of described long core holding unit (1) is provided with inlet, liquid outlet, confined pressure entrance (16) and at least two pressure tap joints.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013201936024U CN203287373U (en) | 2013-04-17 | 2013-04-17 | Long-core simulation water injection testing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013201936024U CN203287373U (en) | 2013-04-17 | 2013-04-17 | Long-core simulation water injection testing system |
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| Publication Number | Publication Date |
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| CN203287373U true CN203287373U (en) | 2013-11-13 |
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| CN2013201936024U Expired - Fee Related CN203287373U (en) | 2013-04-17 | 2013-04-17 | Long-core simulation water injection testing system |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103245769A (en) * | 2013-04-17 | 2013-08-14 | 中国石油天然气股份有限公司 | Long core water injection test simulation system |
| CN103869054A (en) * | 2014-03-25 | 2014-06-18 | 安徽理工大学 | Pressurized grouting test device and method for rock specimens |
| CN104807958A (en) * | 2015-04-02 | 2015-07-29 | 中国石油天然气股份有限公司 | Triaxial self-positioning core holder |
| CN105445270A (en) * | 2014-07-03 | 2016-03-30 | 中国石油化工股份有限公司 | Apparatus for monitoring fluid phase behavior changes in porous medium |
| CN105842425A (en) * | 2016-05-23 | 2016-08-10 | 青岛中瑞泰软控技术有限公司 | Core holding unit and dynamic filtrate loss test unit |
| CN111141889A (en) * | 2018-11-05 | 2020-05-12 | 安徽恩蔓智能科技有限公司 | Intelligent water injection instrument |
| CN112782205A (en) * | 2021-02-07 | 2021-05-11 | 西南石油大学 | High-temperature and high-pressure resistant X-CT scanning long core displacement device for analyzing crude oil distribution of oil-gas reservoir |
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- 2013-04-17 CN CN2013201936024U patent/CN203287373U/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103245769A (en) * | 2013-04-17 | 2013-08-14 | 中国石油天然气股份有限公司 | Long core water injection test simulation system |
| CN103245769B (en) * | 2013-04-17 | 2015-01-21 | 中国石油天然气股份有限公司 | Long core water injection test simulation system |
| CN103869054A (en) * | 2014-03-25 | 2014-06-18 | 安徽理工大学 | Pressurized grouting test device and method for rock specimens |
| CN105445270A (en) * | 2014-07-03 | 2016-03-30 | 中国石油化工股份有限公司 | Apparatus for monitoring fluid phase behavior changes in porous medium |
| CN105445270B (en) * | 2014-07-03 | 2019-04-02 | 中国石油化工股份有限公司 | A kind of device changed for monitoring fluid phase state in porous media |
| CN104807958A (en) * | 2015-04-02 | 2015-07-29 | 中国石油天然气股份有限公司 | Triaxial self-positioning core holder |
| CN104807958B (en) * | 2015-04-02 | 2016-07-06 | 中国石油天然气股份有限公司 | A kind of three axial self-align core holding units |
| CN105842425A (en) * | 2016-05-23 | 2016-08-10 | 青岛中瑞泰软控技术有限公司 | Core holding unit and dynamic filtrate loss test unit |
| CN105842425B (en) * | 2016-05-23 | 2017-12-01 | 青岛中瑞泰软控科技股份有限公司 | A kind of core holding unit and dynamic filtration experimental provision |
| CN111141889A (en) * | 2018-11-05 | 2020-05-12 | 安徽恩蔓智能科技有限公司 | Intelligent water injection instrument |
| CN112782205A (en) * | 2021-02-07 | 2021-05-11 | 西南石油大学 | High-temperature and high-pressure resistant X-CT scanning long core displacement device for analyzing crude oil distribution of oil-gas reservoir |
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