CN106840788B - Suspension type salt rock water-soluble testing device and method - Google Patents
Suspension type salt rock water-soluble testing device and method Download PDFInfo
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/36—Embedding or analogous mounting of samples
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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Abstract
The invention provides a suspension type salt rock water-soluble testing device and method. The device comprises a suspension unit and a sample fixing unit; the suspension unit comprises a pull rod, a first screw rod, a second screw rod and a support rod; the top of the first screw rod is connected with one end of the pull rod, and the top of the second screw rod is connected with the other end of the pull rod; the bottom of the first screw rod and the bottom of the second screw rod are respectively connected with the fixing unit; the support rod is positioned between the pull rod and the fixing unit and is connected with the first screw rod and the second screw rod; the supporting rod can move along the rod direction of the first screw rod and the second screw rod. The invention also provides a method for testing the water solubility of the salt rock by using the device. The technical scheme provided by the invention can meet the requirement of the salt cavern storage cavity manufacturing design on cavity manufacturing parameters, and can simulate the actual cavity manufacturing condition of the salt cavern underground storage more accurately and conveniently.
Description
Technical Field
The invention relates to a suspension type salt rock water-soluble testing device and method, and belongs to the field of cavity construction by salt cavern underground reservoir water in petroleum and natural gas.
Background
The salt cavern underground storage is used for storing petroleum and natural gas by utilizing a thicker salt layer or salt dome underground and forming a cavern storage space in the salt layer or salt dome by water dissolution in an artificial mode, and is used for peak regulation and strategic storage. The key technology for building the reservoir in the salt cavern reservoir is salt cavern construction, which is the key for determining the success of reservoir building engineering. The size and shape of the cavity are mainly determined by geological conditions and construction processes, so that the conditions such as the structure, components, water-soluble characteristics and the like of a salt layer must be fully known before the salt cavern reservoir is built, and the research and design on how to build a safe and stable salt cavity in an underground salt layer need to be carried out, so that the indoor simulation experiment research needs to be carried out firstly, and the water-soluble characteristic parameters (corrosion rate, corrosion angle and the like) of salt rock are measured, so that the requirements of predicting and controlling the volume and the shape of the salt cavity are met.
The salt cavern underground gas storage is one of main storage types, has the advantages of high injection and production efficiency, large short-term throughput, recoverable bedding gas and the like, and is generally adopted in developed countries such as Europe and America. The construction of the salt cavern gas storage in China starts late, along with the development of economy in China, the energy underground storage is more and more emphasized in China, the salt cavern gas storage in Jintan has already been constructed at present, and the salt cavern gas storage in Yungying, Huai' an, flat-topped mountain and the like has already completed feasibility argumentations. Different from the construction of foreign salt dome type salt rock warehouses, the warehouse construction is mainly carried out on multi-interlayer salt rocks in China, salt layers in salt-bearing strata are thin, interlayers are multiple, insoluble substances are high in content, difficulty is brought to the shape control of a cavity, and research on the aspect of cavity construction parameter measurement of different strata needs to be further enhanced.
At present, the cavity-making parameter determination of the salt cavern storage is carried out according to salt mining field 'laboratory test method and requirement for water-soluble property of salt ore', the underground salt mining is obviously different from the cavity-making of the salt cavern storage, the requirement for salt mining is low, the requirement for controlling the shape of the salt cavity is not high, and the current experimental method cannot meet the requirements of the cavity-making process and the cavity-making design of the salt cavern storage.
Therefore, it is an urgent technical problem to be solved in the art to provide a method and a device for determining water-soluble parameters of real reaction salt cavity reservoir cavity-making parameters.
Disclosure of Invention
In order to solve the technical problem, the invention provides a suspension type salt rock water solubility testing device and a suspension type salt rock water solubility testing method. The device and the method can meet the requirement of the salt cavern storage cavity manufacturing design on cavity manufacturing parameters, and can simulate the actual cavity manufacturing condition of the salt cavern underground storage more accurately and conveniently.
In order to achieve the aim, the invention provides a suspension type salt rock water-soluble testing device, which comprises a suspension unit and a sample fixing unit;
the suspension unit comprises a pull rod, a first screw rod, a second screw rod and a support rod; the first screw rod and the second screw rod are respectively positioned on two sides of the pull rod, the top of the first screw rod is connected with one end of the pull rod, and the top of the second screw rod is connected with the other end of the pull rod; the bottom of the first screw rod and the bottom of the second screw rod are respectively connected with the fixing unit; the support rod is positioned between the pull rod and the fixing unit and is connected with the first screw rod and the second screw rod;
the fixing unit comprises a sample fixing ring; or, the fixing unit comprises a sample top fixing disc and a sample tray; wherein the sample top fixed disk is positioned above the sample tray;
the two ends of the supporting rod extend out of the first screw rod and the second screw rod, and the supporting rod can move along the rod directions of the first screw rod and the second screw rod.
In the above-described device, preferably, in the suspension unit, the first lead screw and the second lead screw are perpendicular to the tie rod, respectively.
In the above device, preferably, when the fixing unit is a fixing ring, the pull rod, the support rod and the ring surface of the sample fixing ring are parallel to each other.
In the above apparatus, preferably, when the fixing unit includes a sample top holding disk and a sample tray, the pull rod, the support rod, the disk surface of the sample top holding disk and the disk surface of the sample tray are parallel to each other.
In the above device, preferably, the support rod is movably connected with the first lead screw and the second lead screw.
In the above device, preferably, the joints of the strut and the first and second screws are respectively provided with a first fastening nut group and a second fastening nut group; more preferably, the first set of fastening nuts comprises a first top nut and a first bottom nut, and the second set of fastening nuts comprises a second top nut and a second bottom nut; further preferably, the first fastening nut set is sleeved on the first screw rod, and the second fastening nut set is sleeved on the second screw rod.
In the above device, preferably, the strut is located between the first top nut and the first bottom nut, and between the second top nut and the second bottom nut.
In the above device, preferably, a threaded connection is adopted between the first screw rod and the first fastening nut group, and a threaded connection is adopted between the second screw rod and the second fastening nut group; more preferably, the surfaces of the first screw rod and the second screw rod are respectively provided with an external thread, and the interiors of the first fastening nut group and the second fastening nut group are provided with an internal thread matched with the external thread; the external thread of the surface of the first screw rod is matched with the internal thread of the first fastening nut group, and the external thread of the second screw rod is matched with the internal thread of the second fastening nut group.
The fastening nut group is loosened, the supporting rod can move along the direction of the screw rod, when the screw rod moves to a required position, the fastening nut group is screwed, the supporting rod can be fixed on the screw rod, and the depth of the sample fixing unit at the bottom of the screw rod, which is immersed into the container, can be changed by moving the position of the supporting rod.
In the above device, preferably, the pull rod is provided with an arc-shaped notch, and the notch enables the device to be stably hung on a hook (for example, a hook at the lower end of a spring-type mass meter).
The invention also provides a suspension type salt rock water-soluble testing method which utilizes the device and mainly comprises an upward dissolution test and/or a lateral dissolution test, wherein,
the up-dissolution test comprises the following steps:
flattening the upper end and the lower end of the core to be detected to obtain two opposite sections, and wrapping the rest parts of the core except the two opposite sections with paraffin as a sample for later use;
fixing a section of the sample on a sample fixing ring, immersing the sample in water for corrosion until the aqueous solution reaches a saturated state, and completing the upper dissolution test of the sample;
the lateral dissolution test comprises the following steps:
flattening the upper end and the lower end of the core to be detected to obtain two opposite sections, and wrapping the paraffin on the two opposite sections to be used as a sample for later use;
and placing the sample on a sample tray, wherein one section of the sample is contacted with the sample tray when the sample is placed, the other section of the sample is tightly pressed and fixed through a fixed disc at the top of the sample, and the sample is immersed in water for corrosion until the aqueous solution reaches a saturated state, so that the side dissolution test of the sample is completed.
In the above method, preferably, the water is distilled water.
The technical scheme provided by the invention adopts the paraffin to seal the insoluble surface of the sample, so that the insoluble surface can be prevented from being corroded, meanwhile, because the paraffin has low relative density, the weighing load cannot be increased when the paraffin is sealed on the insoluble surface of the sample, and in the corrosion process, the device can effectively protect the sample and prevent the sample from being damaged.
In the above method, preferably, after the sample is immersed in the water, the method further comprises controlling the depth of immersion of the sample into the water surface by the positions of the support rods on the first lead screw and the second lead screw.
In the above method, when the up-dissolution test and the side-dissolution test are performed on the sample, the amount of water is not particularly limited, and the added water can submerge the surface to be eroded of the sample, for example, for a core with a diameter of 10cm, a 5000mL beaker is used, and 3000-3500mL of water (3000 mL of water is added in the up-dissolution test and 3500mL of water is added in the side-dissolution test).
The invention discovers that the following defects mainly exist when the existing testing method is researched:
1) the method comprises the steps of adopting the existing testing method, wrapping asphalt on the outside of an insoluble surface of a side-soluble sample and an upper-soluble sample to form a shell with a certain thickness, binding the shell by using a rope to suspend the sample in water for testing, wherein the shell has low hardness and is extremely easy to damage in the binding process, so that the experiment fails; moreover, in the corrosion process, the shell can also affect the corrosion speed of the sample, particularly the corrosion speed of the lateral bottom, and can also affect the formation of a corrosion angle;
2) in the existing testing method, the side face with the width of 7cm of a sample cut off is required to be used as an erosion face when side dissolution is carried out, so that the operation is complicated, and only the side face is used as the erosion face, so that the erosion effect is not ideal;
3) the existing test method only focuses on researching how much salt is dissolved in water, and the content of residues in brine and brine components cannot meet the measurement requirement of salt cavern cavity-making parameters, because the measurement requirement of the salt cavern cavity-making parameters focuses more on researching the form of the salt after corrosion and the accumulation form of insoluble substance residues after corrosion and researching the influence of the insoluble substance on the salt rock corrosion form, which cannot be realized by the existing test method.
The invention has the beneficial effects that:
(1) the device provided by the invention can change the depth of the sample entering the solution through the change of the position of the supporting rod, and meet the test of different samples corresponding to different solutions; the pull rod can be used for conveniently placing and taking a sample, and can be conveniently hung on the spring type mass meter, so that the mass change condition of the sample can be measured and recorded at any time without contacting the sample in the dissolving process;
(2) the device provided by the invention is safe, stable and reliable, and in the testing process, except that the measurer can contact the sample when measuring the erosion footage, other processes avoid unnecessary touch of the sample, thereby protecting the experimental sample to the maximum extent;
(3) the conventional test method needs to cut the side surface of a side soluble sample with the width of 7cm as an erosion surface, coat the mixture of asphalt and paraffin on the outside of the insoluble surface of the side soluble sample and an upper soluble sample, form a shell with a certain thickness by the mixture of asphalt and paraffin, and the shell is bound and suspended in an aqueous solution by ropes for test; the technical scheme provided by the invention has the advantages that the test sample is simple to process, only two end faces of the sample are required to be cut flat, the insoluble surface is sealed by wax, the test can be carried out by placing the sample on the device, and the operation is simple and convenient;
(4) according to the conventional test method, the asphalt paraffin shell outside the sample has low hardness and also bears a load of binding and fixing, and once the sample touches and damages the aqueous solution in the experimental process, the sample can invade from the damaged part to cause experimental failure; the wax seal of the insoluble surface of the sample provided by the technical scheme of the invention does not bear the weight, so that the insoluble surface can be prevented from being corroded, and the sample is effectively protected from being damaged;
(5) in the conventional test method, the coating shell of the asphalt and paraffin mixture can affect the sample dissolution speed, particularly the dissolution speed of a side-dissolving bottom part, and can also affect the formation of a dissolution angle; the technical scheme provided by the invention has no any barrier to the erosion surface, ensures that the core sample is fully contacted with water, truly and intuitively simulates the cavity-making shape change process of the underground reservoir, can obtain the erosion angle of the side-dissolving full angle, and is clearer and more accurate;
(6) the conventional test method focuses on researching how much salt is dissolved in water, the content of residues in brine and the components of brine, but has no way to correspondingly research the form of the salt after corrosion, the accumulation form of insoluble residues after corrosion and the influence of the insoluble residues on the corrosion form of salt rocks; on the other hand, due to the existence of the asphalt shell, insoluble residues cannot fall off from the rock core and are accumulated, and only can be retained in the asphalt shell, so that how the insoluble residues falling off from the rock core are accumulated and the accumulation form is not known, and the salt cavern is not comprehensively and accurately embodied; the technical scheme provided by the invention can clearly understand the form change of the rock core after salt corrosion, and insoluble residues can freely fall and accumulate from the rock core in the corrosion process, so that researchers can conveniently research the accumulation form of the insoluble residues.
Drawings
FIG. 1 is a schematic view of a first structure of a suspended salt rock water solubility testing device provided in example 1;
FIG. 2 is a schematic view of a second structure of the suspended type salt rock water solubility testing device provided in embodiment 1;
FIG. 3 is a schematic diagram of the suspended salt rock water solubility testing device provided in example 1;
the main reference numbers illustrate:
1: a pull rod; 2: a first lead screw; 3: a second lead screw; 4: a strut; 5: a sample fixing ring; 6: fixing a sample top fixing disc; 7: a sample tray.
Detailed Description
The technical solutions of the present invention will be described in detail below in order to clearly understand the technical features, objects, and advantages of the present invention, but the present invention is not limited to the practical scope of the present invention.
Example 1
The embodiment provides a suspension type salt rock water solubility testing device, and the structural schematic diagram of the device is shown in fig. 1 and fig. 2.
The device comprises a suspension unit and a fixing unit; wherein,
the suspension unit comprises a pull rod 1, a first screw rod 2, a second screw rod 3 and a support rod 4; the first lead screw 2 and the second lead screw 3 are respectively positioned at two sides of the pull rod 1, the top of the first lead screw 2 is connected with one end of the pull rod 1, and the top of the second lead screw 3 is connected with the other end of the pull rod 1; the first screw rod 2 and the second screw rod 3 are respectively vertical to the pull rod 1;
the bottom of the first screw rod 2 and the bottom of the second screw rod 3 are respectively connected with the fixing unit; the supporting rod 4 is positioned between the pull rod 1 and the fixing unit and connected with the first screw rod 2 and the second screw rod 3, and two ends of the supporting rod 4 extend out of the first screw rod 2 and the second screw rod 3;
a first fastening nut group is sleeved on the first screw rod 2 and comprises a first top nut and a first bottom nut, internal threads are arranged inside the first top nut and the first bottom nut, and the internal threads are matched with external threads on the surface of the first screw rod 2, namely the first fastening nut group can be fixed on the first screw rod 2 through threaded connection;
a second fastening nut group is sleeved on the second screw rod 3 and comprises a second top nut and a second bottom nut, internal threads are arranged inside the second top nut and the second bottom nut, and the internal threads are matched with external threads on the surface of the second screw rod 3, namely the second fastening nut group can be fixed on the second screw rod 3 through threaded connection;
the supporting rod 4 is positioned between the first top nut and the first bottom nut and between the second top nut and the second bottom nut, and the pressure between the top nut and the bottom nut can firmly fix the supporting rod 4 on the first screw rod 2 and the second screw rod 3;
the fixing unit includes a sample fixing ring 5; alternatively, the fixing unit comprises a sample top fixing disk 6 and a sample tray 7; wherein, the sample top fixing disc 6 is positioned above the sample tray 7;
when the fixing unit is a sample fixing ring 5 (as shown in fig. 1), the pull rod 1, the support rod 4 and the ring surface of the sample fixing ring 5 may be parallel to each other;
when the fixing unit includes the sample top fixing disk 6 and the sample tray 7 (as shown in fig. 2), the pull rod 1, the support rod 4, the disk surface of the sample top fixing disk 6, and the disk surface of the sample tray 7 may be parallel to each other;
an arc-shaped gap can be arranged on the pull rod 1, and the gap can enable the device to be stably hung on the hook.
Example 2
The embodiment provides a suspension type salt rock water solubility testing method, which uses the device provided by the embodiment 1 and comprises the following steps:
1) and (3) upward dissolution test:
taking a measured core with the diameter of 10cm, and cutting the upper surface and the lower surface of the core flat to obtain two opposite sections; then, coating wax on the outer side (excluding the two opposite sections) of the core to prevent the side surface of the core sample from being corroded in the test process, and taking the processed core as the sample for later use;
one section of the sample is fixed on the sample fixing ring 5 by adopting a nut, and the fixed section of the sample to be detected and the ring surface of the sample fixing ring 5 can be kept parallel or in the same plane in the fixing process.
After the sample is fixed, the support rod 4 is arranged on a 5000mL beaker (as shown in fig. 3), 3000mL of water is filled in the beaker, at the moment, the device is suspended in the container, when the depth of the sample immersed in the water needs to be adjusted, the first fastening nut group and the second fastening nut group are loosened, the support rod 4 is moved, and the position of the support rod on the first screw rod and the second screw rod is changed.
In the initial stage of testing, the salt concentration of the solution in the container is low, the corrosion speed of the sample is high, at the moment, the corrosion footage and the quality of the sample are measured every 10-15 minutes (when the quality is measured, the pull rod 4 is directly hung on a hook of a spring type mass meter, the sample is prevented from being contacted), and the corrosion shape of the sample is recorded;
after a period of erosion, the salt concentration of the solution in the container gradually increases and the erosion rate of the sample gradually decreases, at which time the erosion footage and mass of the measurement sample can be gradually increased and the time interval for recording the erosion shape of the sample until the salt concentration of the solution in the container reaches saturation.
2) Side dissolution test:
taking a measured core with the diameter of 10cm, cutting the upper surface and the lower surface of the measured core flat, and wrapping paraffin to prevent the upper surface and the lower surface of a core sample from being corroded in a test, wherein the processed core is used as the sample for later use;
the sample is placed on a sample tray 7 with one section of the sample in contact with the sample tray 7 and the other section in contact with the sample top holding disk 6, the sample tray 7 and the sample top holding disk 6 together holding the sample in place.
After the sample is fixed, the support rod 4 is erected on a 5000mL beaker according to a mode in an upper dissolution test, 3500mL water is filled in the beaker, and the depth of the core immersed in the water is controlled by adjusting the positions of the support rod 4 on the first screw rod and the second screw rod so as to ensure the test effect.
In the initial stage of testing, the salt concentration of the solution in the container is low, the corrosion speed of the sample is high, and at the moment, the corrosion footage and the quality of the sample are measured every 10 to 15 minutes and the corrosion shape is recorded;
after a period of erosion, the salt concentration of the solution in the container gradually increases and the erosion rate of the sample gradually decreases, at which time the erosion footage and mass of the above-mentioned measurement sample can be gradually extended and the time interval for recording the erosion shape of the sample until the solution is saturated.
The test method provided by the embodiment adopts the transparent beaker, the outside of the core sample is not coated with asphalt, the whole dissolution process of the core sample is visible, and a person skilled in the art can observe and record the change of the corrosion angle of the core sample in the corrosion process, the migration and distribution conditions of insoluble substances and brine, and the morphological change of the core sample in the corrosion process at a full angle, so as to provide experimental data for simulating the morphological change of the salt cavern in the cavity formation at the later stage.
Claims (3)
1. A suspension type salt rock water-soluble testing device comprises a suspension unit and a sample fixing unit;
the suspension unit comprises a pull rod, a first screw rod, a second screw rod and a support rod; the first screw rod and the second screw rod are respectively positioned on two sides of the pull rod, the top of the first screw rod is connected with one end of the pull rod, and the top of the second screw rod is connected with the other end of the pull rod; the bottom of the first screw rod and the bottom of the second screw rod are respectively connected with the fixing unit; the support rod is positioned between the pull rod and the fixing unit and is connected with the first screw rod and the second screw rod;
the fixing unit comprises a sample fixing ring, or the fixing unit comprises a sample top fixing disc and a sample tray; wherein the sample top fixed disk is positioned above the sample tray;
two ends of the supporting rod extend out of the first screw rod and the second screw rod, and the supporting rod can move along the first screw rod and the second screw rod;
in the suspension unit, the first screw rod and the second screw rod are respectively vertical to the pull rod;
when the fixing unit comprises a sample top fixing disc and a sample tray, the pull rod, the support rod, the disc surface of the sample top fixing disc and the disc surface of the sample tray are parallel to each other;
a first fastening nut group and a second fastening nut group are respectively arranged at the joint of the support rod and the first screw rod and the second screw rod; when the fixing unit is a fixing ring, the pull rod, the support rod and the ring surface of the sample fixing ring are parallel to each other;
the first fastening nut set comprises a first top nut and a first bottom nut, and the second fastening nut set comprises a second top nut and a second bottom nut;
the first fastening nut group is sleeved on the first screw rod, and the second fastening nut group is sleeved on the second screw rod;
the support rod is positioned between the first top nut and the first bottom nut and between the second top nut and the second bottom nut;
the surface of the first screw rod and the surface of the second screw rod are respectively provided with an external thread, and the inside of the first fastening nut group and the second fastening nut group is provided with an internal thread matched with the external thread.
2. A suspended salt rock water solubility test method which is completed by the device of claim 1 and comprises an up-dissolution test and/or a side-dissolution test, wherein,
the up-dissolution test comprises the following steps:
cutting two ends of a core to be detected flat to obtain two opposite sections, and wrapping the rest parts of the core except the two sections with paraffin as a sample for later use;
fixing a section of the sample on a sample fixing ring, immersing the sample in water for corrosion until the aqueous solution reaches a saturated state, and completing the upper dissolution test of the sample;
the lateral dissolution test comprises the following steps:
cutting two ends of a core to be detected flat to obtain two opposite sections, and wrapping the two opposite sections with paraffin for later use as a sample;
and placing the sample on a sample tray, wherein one section of the sample is contacted with the sample tray when the sample is placed, the other section of the sample is tightly pressed and fixed through a fixed disc at the top of the sample, and the sample is immersed in water for corrosion until the aqueous solution reaches a saturated state, so that the side dissolution test of the sample is completed.
3. The method of claim 2, wherein the water is distilled water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611182950.6A CN106840788B (en) | 2016-12-20 | 2016-12-20 | Suspension type salt rock water-soluble testing device and method |
Applications Claiming Priority (1)
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103163043A (en) * | 2013-03-26 | 2013-06-19 | 中国科学院武汉岩土力学研究所 | Device and method for testing rock salt dissolution rates |
| CN103399140A (en) * | 2013-08-09 | 2013-11-20 | 中国科学院武汉岩土力学研究所 | Rock and soil disintegration test device as well as using method |
| CN203350150U (en) * | 2013-07-03 | 2013-12-18 | 河北钢铁股份有限公司邯郸分公司 | Device for determining apparent porosity of pellets |
| CN105158439A (en) * | 2015-08-24 | 2015-12-16 | 中国地质科学院岩溶地质研究所 | Carbonate reservoir corrosion process simulation test device |
| CN105675806A (en) * | 2015-12-31 | 2016-06-15 | 中国石油天然气股份有限公司 | Salt cavern storage cavity-making parameter testing device and method |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103163043A (en) * | 2013-03-26 | 2013-06-19 | 中国科学院武汉岩土力学研究所 | Device and method for testing rock salt dissolution rates |
| CN203350150U (en) * | 2013-07-03 | 2013-12-18 | 河北钢铁股份有限公司邯郸分公司 | Device for determining apparent porosity of pellets |
| CN103399140A (en) * | 2013-08-09 | 2013-11-20 | 中国科学院武汉岩土力学研究所 | Rock and soil disintegration test device as well as using method |
| CN105158439A (en) * | 2015-08-24 | 2015-12-16 | 中国地质科学院岩溶地质研究所 | Carbonate reservoir corrosion process simulation test device |
| CN105675806A (en) * | 2015-12-31 | 2016-06-15 | 中国石油天然气股份有限公司 | Salt cavern storage cavity-making parameter testing device and method |
Non-Patent Citations (1)
| Title |
|---|
| 湖北省应城市盐穴地下储气库盐岩溶解性能试验研究;赵桂芳等;《资源环境与工程》;20140430;第209-213页 * |
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