CN120334053B - Oil reservoir porosity measurement method and device - Google Patents
Oil reservoir porosity measurement method and deviceInfo
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- CN120334053B CN120334053B CN202510839905.6A CN202510839905A CN120334053B CN 120334053 B CN120334053 B CN 120334053B CN 202510839905 A CN202510839905 A CN 202510839905A CN 120334053 B CN120334053 B CN 120334053B
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Abstract
The invention relates to the technical field of porosity measurement devices, and particularly discloses a method and a device for measuring oil reservoir porosity, wherein the method and the device comprise a workbench, an L-shaped mounting plate is fixedly arranged at the edge of the rear end of the upper end surface of the workbench, and a rack rod is slidably arranged at the front part of the upper end of the L-shaped mounting plate; the sample main body can be measured under the action of the weight measuring device, then the sample main body can be in a dry state under the action of a subsequent evaporation cavity shell, at the moment, the dried mass of the sample main body can be obtained under the action of the weight measuring device, then the sample main body can be soaked in the water tank under the action of the structures such as a rack rod, a water pump and a support rod, then the weight of the sample main body at the moment can be obtained under the action of the weight measuring device, and then the right aperture of the inside of the sample main body can be calculated by utilizing a formula.
Description
Technical Field
The invention relates to the technical field of porosity measurement devices, in particular to a method and a device for measuring the porosity of an oil reservoir.
Background
The geological core is one of important data for carrying out underground oil reservoir research, the existing method for measuring the porosity of the core mainly comprises the methods of the surface volume, the pore volume, the solid volume and the like of the core, and the core scanning method belongs to a method for measuring the porosity through the surface volume.
Core scanners are very important devices for geologists to collect, image, analyze and properly store precious geological core entities. The porosity can be obtained by scanning the rock core, the permeability can be obtained by analysis according to the porosity, and the basic condition of the oil reservoir can be judged based on the porosity and the permeability.
However, in the current measurement of the porosity of the oil reservoir, most of the oil reservoir needs to use a high-precision scanning device to perform the operation, so that a long waiting time is needed in the measurement process, which is because the long waiting time is needed in the scanning process, so that a lot of time is needed.
Therefore, to save time and improve the efficiency of measurement, we propose a method and apparatus for measuring the porosity of oil reservoir.
Disclosure of Invention
The invention aims to provide a method and a device for measuring the porosity of an oil reservoir, which are used for solving the problems in the background technology.
In order to achieve the aim, the invention provides the technical scheme that the oil reservoir porosity measurement method and device comprises a workbench, wherein an L-shaped mounting plate is fixedly arranged at the edge of the rear end of the upper end surface of the workbench, and a rack rod is slidably arranged at the front part of the upper end of the L-shaped mounting plate;
an upper sealing disc is fixedly arranged at the lower end of the rack bar and positioned at the inner side of the L-shaped mounting plate;
a sample main body is arranged below the upper sealing disc;
a supporting disc is arranged at the lower end of the sample main body, a weight measuring spring is uniformly and fixedly arranged on a lower annular array of the supporting disc, and a weight measuring device is fixedly arranged at the lower end of the weight measuring spring;
The lower part of the weight measuring device is fixedly provided with a water tank at the upper end surface of the workbench, and the sample main body can slide to the inside of the water tank.
Preferably, the supporting legs are symmetrically and fixedly arranged on the left side and the right side of the lower end face of the workbench, the supporting legs are used for enabling the workbench to be far away from the ground, through holes with circular structures are formed in the upper end to the inner side face of the L-shaped mounting plate, and the rack rod is slidably arranged in the through holes.
Preferably, the up end fixed mounting of L shape mounting panel has the first motor of symmetry state, all fixed mounting has first gear on the output shaft of first motor, first gear all meshes with the rack bar each other, and first gear can drive the rack bar and slide from top to bottom in the through-hole inside.
Preferably, the upper end face of the upper sealing disc is fixedly provided with a water pump, the upper end of the water pump is fixedly provided with a water pipe with a U-shaped structure, and the lower end of the water pump is fixedly provided with a water pipe with the same structure outside the lower end of the upper sealing disc.
Preferably, the left and right sides of the upper end of the L-shaped mounting plate are fixedly provided with second motors, the output shafts of the second motors are fixedly provided with first rotating rods, the outer sides of one ends of the first rotating rods, which are far away from the second motors, are fixedly provided with second rotating rods, one ends of the second rotating rods, which are far away from the first rotating rods, are fixedly provided with evaporation cavity shells, and the evaporation cavity shells can be combined into a cylindrical structure.
Preferably, a third motor is arranged below the workbench, a main gear is fixedly arranged on an output shaft of the third motor, a plurality of auxiliary gears are uniformly arranged on a lower annular array of the workbench, and the number of the auxiliary gears is four, and the auxiliary gears are meshed with the main gear on the inner side.
Preferably, the center position of the upper end face of the pinion is fixedly provided with a reciprocating screw, the upper end of the reciprocating screw penetrates through the workbench to extend into the water tank, the inner circumferential surface of the water tank is provided with a second chute in an annular array, and the reciprocating screw is rotatably arranged in the second chute.
Preferably, the first sliding table is installed in the equal screw thread rotation on the periphery of reciprocal screw rod, first sliding table slidable mounting is in the inside of second spout, the outside one end that first sliding table is located the second spout all rotates and installs the bracing piece, the one end that first sliding table was kept away from to the bracing piece is connected with the lower terminal surface rotation of weight-measuring device.
Preferably, the even deposit-removal evil of supporting disk up end annular array has first spout, the inside of first spout is rotated to the outside and is installed adjusting screw, screw thread rotation is installed on adjusting screw's the periphery and is fixed the arc board, fixed arc board slidable mounting is in the inside of first spout, and the inner wall can laminate with the sample lateral surface, the up end of supporting disk is located between two adjacent first spouts to the lower terminal surface and has offered the water drain hole.
A method for measuring porosity of an oil reservoir, comprising the steps of:
Placing a sample main body on the upper end surface of a supporting disc, rotating an adjusting screw, fixing the sample main body by a fixing arc plate 26, and measuring the current mass of the sample main body through a weight measuring device;
starting a second motor, wherein an output shaft of the second motor rotates with a first rotating rod, the first rotating rod rotates with a second rotating rod, the second rotating rod synchronously rotates with an evaporation cavity shell, the evaporation cavity shell wraps a sample main body, and drying operation is carried out on the sample main body;
The second motor reversely operates to enable the evaporation cavity shell to be far away from the sample main body, the first motor is started, the first motor drives the first gear to rotate, the first gear drives the rack rod to descend, and the rack rod drives the lower end face of the upper sealing disc to be attached to the upper end face of the sample main body;
Starting a third motor, wherein an output shaft of the third motor rotates with a main gear, the main gear rotates with a pinion gear, the pinion gear rotates with a reciprocating screw rod, and when the reciprocating screw rod rotates, a first sliding table slides in a second sliding groove, and the first sliding table moves downwards with a supporting rod;
Step five, the supporting rod moves downwards to synchronously move with the weight measuring device, the weight measuring device carries a weight measuring spring, the weight measuring spring carries a supporting disc, the supporting disc carries a sample main body, and at the moment, the rack rod synchronously moves downwards;
starting a water pump, injecting water into the sample main body through a water pipe to enable the sample main body to float out of the water tank, enabling water on the surface of the supporting disc to flow out of the water outlet hole, at the moment, weighing the sample main body through a weight measuring device,
And seventhly, calculating the porosity of the sample main body by using a formula, wherein the calculation formula is as follows:
(1) Measuring and calculating different masses of the sample main body 27, and drying the sample mass M1 and saturated water sample mass M2;
(2) The mass difference is the mass of water in the pores, and the mass formula is as follows:
;
(3) Pore volume was calculated:
;
Wherein V is the pore volume, For the quality of the water, the water is in a state of being,Is the density of water;
(4) Porosity calculation formula:
;
R is the porosity, V is the pore volume, and S is the sample volume.
Compared with the prior art, the invention has the beneficial effects that:
1. According to the invention, the initial mass of the sample main body can be measured under the action of the weight measuring device, then the sample main body can be in a dry state under the action of the subsequent evaporation cavity shell, at the moment, the dried mass of the sample main body can be obtained under the action of the weight measuring device, then the sample main body can be soaked in the water tank under the action of the structures such as the rack rod, the water pump and the support rod, then the weight of the sample main body can be obtained under the action of the weight measuring device, and then the right aperture of the inside of the sample main body can be calculated by utilizing a formula.
2. According to the invention, under the mutual matching of the weight measuring spring and the rack rod, the mass measurement of the sample main body in different states is realized, and compared with the traditional static measurement, the dynamic measurement mode is more accurate, and the physical characteristics of the sample main body can be reflected more truly. Meanwhile, the sample main body can be conveniently soaked in water through the cooperation of the water pump and the water tank, so that the actual situation in an oil reservoir is simulated, and the accuracy and the practicability of measurement are improved.
3. The device has the advantages of compact structure, simple and convenient operation, greatly improved measurement efficiency, reduced measurement cost, and provision of a new solution for measuring the porosity of the oil reservoir. Through optimizing the overall arrangement and the cooperation of each part for whole device is more smooth in the operation in-process, has reduced fault rate and maintenance cost, simultaneously, the device still has higher degree of automation, can reduce manual operation's error, has improved measuring precision and repeatability.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a main block diagram of the present invention;
FIG. 2 is a block diagram of a work table and L-shaped mounting plate of the present invention;
FIG. 3 is a front view of the present invention;
fig. 4 is a view showing a construction of a rack bar and a first gear according to the present invention;
FIG. 5 is a bottom view of the present invention;
FIG. 6 is a schematic view of a water tank and sample body of the present invention;
FIG. 7 is a diagram of a support plate structure of the present invention;
fig. 8 is a schematic view of the main gear and the pinion gear of the present invention.
Reference numerals illustrate:
1. the device comprises a workbench, 2 supporting legs, 3L-shaped mounting plates, 301 through holes, 4 first motors, 5 first gears, 6 rack bars, 7 upper sealing plates, 8 water pumps, 9 water pipes;
10. A second motor; 11, a first rotating rod, 12, a second rotating rod, 13, an evaporation cavity shell, 14, a third motor, 15, a main gear, 16, a pinion, 17, a reciprocating screw, 18, a first sliding table, 19 and a supporting rod;
20. A weight measuring device; 21 parts of weight measuring spring, 22 parts of supporting disk, 23 parts of water draining hole, 24 parts of first chute, 25 parts of adjusting screw, 26 parts of fixed arc plate, 27 parts of sample main body, 28 parts of water tank, 281 parts of second chute.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1 to 8, the present invention provides a technical solution:
The utility model provides a method and device for measuring porosity of oil reservoir, includes workstation 1, and the symmetry of lower terminal surface left and right sides of workstation 1 is equipped with supporting leg 2, can let workstation 1 keep away from ground under supporting leg 2's effect, and secondly, the position fixed mounting who is equipped with the L shape mounting panel 3 of vertical state at the up end rear portion edge of workstation 1, and it is to be noted that, the top of L shape mounting panel 3 is forward outstanding, as shown in fig. 1.
A through hole 301 having a circular structure is formed in the center of the top end of the L-shaped mounting plate 3 from the upper end face to the lower end face, and a first motor 4 having a symmetrical state is fixedly mounted on the top of the L-shaped mounting plate 3 at the edge of the through hole 301, and a first gear 5 is fixedly mounted on the output shaft of the first motor 4, as shown in fig. 3.
The first gear 5 is slidably mounted in the through hole 301, and the first gears 5 on the left and right sides of the first gear 5 are in a mutually meshed state, so that in the use process, the first motor 4 is started, the output shaft of the first motor 4 drives the first gear 5 to rotate, the first gear 5 can drive the rack bar 6 to slide in the through hole 301 in the rotating process, and the height of the subsequent rack bar 6 can be changed.
An upper seal disk 7 having a circular structure is fixedly mounted at the lower end of the rack bar 6, and the upper seal disk 7 can move up and down along with the movement of the rack bar 6.
The left and right sides of the upper part of the L-shaped mounting plate 3 are symmetrically and fixedly provided with a second motor 10, the output shaft of the second motor 10 is fixedly provided with a first rotating rod 11, and the outer side of one end of the first rotating rod 11 far away from the second motor 10 is fixedly provided with a second rotating rod 12, as shown in fig. 3.
In the use process, the second motor 10 is started, the output shaft of the second motor 10 drives the first rotating rod 11 to rotate, the first rotating rod 11 drives the second rotating rod 12 to synchronously rotate in the rotating process, and the second rotating rod 12 can be finally changed into a horizontal straight line state from an inclined state in the rotating process, as shown in fig. 3.
The second bull stick 12 keeps away from the one end fixed mounting who first bull stick 11 has evaporation chamber shell 13, and after second bull stick 12 rotates to horizontal rectilinear state, can let two left and right sides evaporation chamber shell 13 closely laminate together to this can let two evaporation chamber shells 13 make up into cylindrical structure, and then can carry out evaporation drying operation to sample main part 27 in subsequent operation.
The left and right evaporation chamber shells 13 are close to each other and finally attached together to form a complete evaporation chamber. The inner wall of evaporating chamber shell 13 all is provided with the zone of heating, heats the evaporating chamber through the zone of heating for the oil reservoir sample in the evaporating chamber can evaporate fast. Meanwhile, the outer side of the evaporation cavity shell 13 is further provided with an insulating layer, and the insulating layer can effectively reduce heat loss and improve heating efficiency. After the evaporation cavity shells 13 are mutually attached to form an evaporation cavity, the upper sealing disc 7 descends and is in close contact with the upper end face of the evaporation cavity shells 13, so that the evaporation cavity is sealed, and steam leakage in the evaporation process is prevented.
The upper end face of the workbench 1 is fixedly provided with a water tank 28, the top of the water tank 28 is of a cavity structure, the lower end face of the workbench 1 is provided with a third motor 14, an output shaft of the third motor 14 is fixedly provided with a main gear 15, then, the lower end face of the workbench 1 is positioned on the outer side of the main gear 15, an annular array is uniformly provided with four auxiliary gears 16, and the auxiliary gears 16 are all meshed with the main gear 15, as shown in fig. 8.
The center of the upper end surface of the pinion 16 is fixedly provided with a reciprocating screw 17, the upper end of the reciprocating screw 17 passes through the workbench 1 and is positioned in the water tank 28, four second sliding grooves 281 are formed on the inner circumferential surface of the water tank 28, and the reciprocating screw 17 is rotatably arranged in the second sliding grooves 281, as shown in fig. 6.
In the use process, the third motor 14 is started, the output shaft of the third motor 14 drives the main gear 15 to rotate, the main gear 15 drives the auxiliary gear 16 to synchronously rotate in the rotating process, and at the moment, the auxiliary gear 16 can synchronously rotate with the reciprocating screw 17 in the rotating process.
The first sliding table 18 is rotatably mounted on the circumferential surface of the reciprocating screw 17, and the first sliding table 18 is slidably mounted in the second sliding groove 281, so that the first sliding table 18 can slide up and down in the second sliding groove 281 when the reciprocating screw 17 rotates during use.
Then, the supporting rods 19 are fixedly mounted at one end of the inner side of the first sliding table 18, and one ends of the four supporting rods 19, which are far away from the first sliding table 18, are fixedly mounted at the lower end face of the weight measuring device 20, as shown in fig. 8.
Therefore, in the use process, along with the up-and-down movement of the first sliding table 18, the supporting rod 19 can be made to slide up and down synchronously with the weight measuring device 20.
The upper end face annular array of the weight measuring device 20 is uniformly and fixedly provided with a plurality of weight measuring springs 21, the tops of the weight measuring springs 21 are fixedly provided with a supporting plate 22 together, the annular array is uniformly provided with four first sliding grooves 24 from the upper end of the supporting plate 22 to the outer circumferential face, the inner wall face of the first sliding grooves 24 is rotatably provided with an adjusting screw 25 to the outer side of the supporting plate 22, the circumferential face of the adjusting screw 25 is rotatably provided with a fixed arc plate 26 in a threaded mode, and the fixed arc plate 26 is slidably arranged in the first sliding grooves 24.
Wherein, weight-measuring device 20 and weight-measuring spring 21 can cooperate each other, support supporting disk 22, and simultaneously, weight-measuring spring 21 has certain elasticity, can produce deformation when receiving external force effect to weight-measuring spring 21 selects the pressure sensor spring for with the quality conversion pressure signal of sample main part 27.
Next, the weight measuring device 20 is built with a pressure sensor, and measures the mass of the sample main body 27 in real time by sensing the pressure change of the weight measuring spring 21.
And, the elastic deformation of the weight measuring spring 21 is combined with the high-sensitivity sensor of the weight measuring device 20, so that milligram-level precision measurement can be realized, the measurement is superior to the traditional static weighing equipment, the multi-spring annular uniform distribution is realized, the uniform stress is ensured, and the influence of sample eccentricity on the measurement result is reduced.
The upper end surface of the support plate 22 is provided with drain holes 23 between two adjacent first sliding grooves 24, and then, a sample main body 27 is placed on the inner side of the fixed arc plate 26, as shown in fig. 7.
In the use process, the different masses of the sample main body 27 need to be measured and calculated, the sample mass M1 after drying and the sample mass M2 after saturation;
the mass difference is the mass of water in the pores, and the mass formula is as follows:
;
Pore volume was calculated:
;
Wherein V is the pore volume, For the quality of the water, the water is in a state of being,Is the density of water;
Porosity calculation formula:
;
R is the porosity, V is the pore volume, and S is the sample volume.
In the process of calculation, an operator is required to measure the volume of the sample main body 27 first, and in the process of operation, the surface of the sample main body 27 after saturated water is required to be wiped, so that the surface is ensured to be dry.
Firstly, placing a sample main body 27 on the upper end surface of a supporting disc 22, rotating an adjusting screw 25, fixing a fixed arc plate 26 to fix the sample main body 27, and measuring the mass of the current sample main body 27 through a weight measuring device 20;
starting a second motor 10, wherein an output shaft of the second motor 10 rotates with a first rotating rod 11, the first rotating rod 11 rotates with a second rotating rod 12, the second rotating rod 12 synchronously rotates with an evaporation cavity shell 13, the evaporation cavity shell 13 wraps a sample main body 27, and the sample main body 27 is dried;
the second motor 10 works reversely, the evaporation cavity shell 13 is far away from the sample main body, the first motor 4 is started, the first motor 4 drives the first gear 5 to rotate, the first gear 5 drives the rack rod 6 to descend, and the rack rod 6 drives the lower end face of the upper sealing disc 7 to be attached to the upper end face of the sample main body 27;
Starting a third motor 14, wherein an output shaft of the third motor 14 rotates with a main gear 15, the main gear 15 rotates with a secondary gear 16, the secondary gear 16 rotates with a reciprocating screw 17, when the reciprocating screw 17 rotates, a first sliding table 18 slides in a second sliding groove 281, and the first sliding table 18 moves downwards with a supporting rod 19;
step five, the support rod 19 moves downwards to synchronously move with the weight measuring device 20, the weight measuring device 20 carries with the weight measuring spring 21, the weight measuring spring 21 carries with the support disc 22, the support disc 22 carries with the sample main body 27, and at the moment, the rack rod 6 synchronously moves downwards;
Step six, starting the water pump 8, injecting water into the sample main body 27 through the water pipe 9 by the water pump 8, enabling the sample main body 27 to float out of the water tank 28, enabling water on the surface of the support disc 22 to flow out of the water outlet hole 23, at the moment, weighing the sample main body 27 through the weighing device 20,
Step seven, calculating the porosity of the sample main body 27 by a formula, wherein the calculation formula is as follows;
in the use process, the different masses of the sample main body 27 need to be measured and calculated, the sample mass M1 after drying and the sample mass M2 after saturation;
the mass difference is the mass of water in the pores, and the mass formula is as follows:
;
Pore volume was calculated:
;
Wherein V is the pore volume, For the quality of the water, the water is in a state of being,Is the density of water;
Porosity calculation formula:
;
R is the porosity, V is the pore volume, and S is the sample volume.
In the process of calculation, an operator is required to measure the volume of the sample main body 27 first, and in the process of operation, the surface of the sample main body 27 after saturated water is required to be wiped, so that the surface is ensured to be dry.
It should be noted that the above embodiments are merely for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that the technical solution described in the above embodiments may be modified or some or all of the technical features may be replaced equally, and these modifications or substitutions do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the present invention.
Claims (9)
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