Oil and gas output evaluation device and oil and gas output evaluation method for shale

Abstract

The invention discloses an oil and gas output evaluation device and method for shale, and relates to the field of shale oil and gas resource evaluation.The oil and gas output evaluation device comprises a heating assembly, an oil and gas output evaluation device and an oil and gas output evaluation device, the centrifugal assembly is rotatably arranged in the heating cavity, and a limiting groove is formed in the centrifugal assembly; the reaction assembly is arranged in the limiting groove, and a reaction cavity, an air inlet channel and an air outlet channel are formed in the reaction assembly, and the air inlet channel and the air outlet channel communicate with the reaction cavity; the clamping assembly is arranged in the reaction cavity, a fixing cavity is formed in the clamping assembly, the fixing cavity is suitable for containing the rock core, an air inlet hole and an air outlet hole which are communicated with the fixing cavity are formed in the clamping assembly, the air inlet hole is communicated with the air inlet channel, and the air outlet hole is communicated with the air outlet channel. According to the oil and gas output evaluation device provided by the embodiment of the invention, the quantitative evaluation precision can be improved, and accurate exploration and efficient development of shale oil can be realized.

Description

Technical Field

[0001] The present invention relates to the field of shale oil and gas resource evaluation, and in particular to an oil and gas production evaluation device and an oil and gas production evaluation method for shale. Background Art

[0002] In the relevant technology, shale oil, as an important unconventional oil resource, is mainly divided into two types: medium-low maturity shale oil and medium-high maturity shale oil. Medium-low maturity shale oil is mainly composed of unconverted solid organic matter and needs to be heated to 300-600°C before it can be converted into oil and gas products, while medium-high maturity shale oil is mainly liquid oil. Due to the complex geological characteristics and physical and chemical properties of shale and the interaction between the hydrocarbons, only a part of the primary hydrocarbons and secondary hydrocarbons produced by pyrolysis in the core can be recovered, which is the movable oil resources, and the rest cannot be recovered, which is the immovable oil resources. At present, the accurate evaluation of the movable oil resources in shale under different environments is one of the urgent challenges facing shale oil exploration and production.

[0003] Currently, there is a lack of evaluation devices specifically for the production of movable oil and hydrocarbon gas in shale. Existing similar devices have single functions and cannot meet the requirements of accurate quantitative evaluation under in-situ conditions, which restricts the precise exploration and efficient development of shale oil. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide an oil and gas production evaluation device for shale, which can improve the accuracy of quantitative evaluation and help achieve accurate exploration and efficient development of shale oil.

[0005] The present invention also proposes an oil and gas production evaluation method applied to the above-mentioned oil and gas production evaluation device.

[0006] According to an embodiment of the present invention, an oil and gas production evaluation device for shale includes: a heating component, a heating chamber is formed in the heating component; a centrifugal component, the centrifugal component is rotatably arranged in the heating chamber, and a limiting groove is formed on the centrifugal component; a reaction component, the reaction component is arranged in the limiting groove, and a reaction chamber is formed in the reaction component, and an air inlet channel and an air outlet channel connected to the reaction chamber are formed on the reaction component; a clamping component, the clamping component is arranged in the reaction chamber and a fixed chamber is formed inside the clamping component, the fixed chamber is suitable for accommodating a core, and an air inlet hole and an air outlet hole connected to the fixed chamber are formed on the clamping component, the air inlet hole is connected to the air inlet channel, and the air outlet hole is connected to the air outlet channel.

[0007] According to an oil and gas production evaluation device for shale according to an embodiment of the present invention, the oil and gas production evaluation device is provided with a heating component, a centrifugal component, a reaction component and a clamping component. The clamping component can be used to fix the core, the reaction component can pressurize the reaction chamber to simulate the pressure of the shale in the underground, the heating component can heat the core, the centrifugal component can discharge the oil and gas in the core into the reaction chamber, and the reaction component can collect the oil and gas through the gas outlet channel to facilitate the measurement of the oil and gas, thereby more accurately calculating the content of movable oil and hydrocarbon gas in the shale, being closer to the real data in actual production, and the measurement process has higher accuracy and reliability.

[0008] In some embodiments of the present invention, the reaction component includes: a first shell, the first shell is arranged in the limiting groove, a fixing part is arranged in the first shell, the fixing part has a fixed end formed on one side along the first direction, and the fixed end is limitedly matched with one end of the clamping component along the first direction; a second shell, the second shell is arranged on one side of the first shell along the first direction and is sealed with the first shell, the air inlet channel and the air outlet channel are formed on the second shell, and an elastic part connected to the other end of the clamping component along the first direction is formed on the inner wall of the second shell.

[0009] In some embodiments of the present invention, a baffle is provided on a side of the second shell facing the clamping assembly, and a free end of the baffle is connected to the fixing member; wherein the reaction chamber is formed between the baffle, the fixing member and the second shell.

[0010] In some embodiments of the present invention, an air inlet cavity is formed between the outer wall of the baffle and the inner wall of the first shell, the fixing member forms an air ventilation channel and a first through hole and a second through hole connected to the air ventilation channel, the first through hole is connected to the air inlet cavity, and the second through hole is arranged corresponding to the air inlet hole.

[0011] In some embodiments of the present invention, the clamping assembly includes: a base plate, which is arranged on the fixing member and cooperates with the fixing end, a portion of the base plate is arranged corresponding to the second through hole, and the air inlet is formed on the base plate; a side plate, which is arranged on the side of the base plate away from the fixing member and extends along the first direction, and the air outlet is formed on the side plate; a top plate, which is arranged at the free end of the side plate and cooperates with the side plate, and the top plate is connected to the elastic member; wherein the base plate, the side plate and the top plate define the fixing cavity.

[0012] In some embodiments of the present invention, the oil and gas production evaluation device also includes: a sealing member, which is accommodated in the reaction chamber and is arranged around the outer peripheral wall of the side plate, and along the first direction, one end of the sealing member abuts against the fixed end, and the other end of the sealing member abuts against the top plate.

[0013] In some embodiments of the present invention, the centrifugal component includes: a centrifugal generator, which is arranged on the heating component; a rotating shaft, which is dynamically connected to the centrifugal generator; an outer shell, the bottom end of which is connected to the free end of the rotating shaft, and the outer shell is provided with the limiting groove; and a flip cover, which is movably arranged on the outer shell and is suitable for fixing the reaction component in the limiting groove.

[0014] In some embodiments of the present invention, there are multiple shells, the bottom ends of the multiple shells are connected to the rotating shaft, and the multiple shells are symmetrically arranged along the axis of the rotating shaft.

[0015] In some embodiments of the present invention, the heating assembly includes: a base, the top of which is provided with a mounting groove suitable for mounting the centrifugal generator; a heating element, which is arranged at the top of the base and extends along a first direction; and a top cover, which is arranged at the free end of the heating element; wherein the base, the heating element and the top cover define the heating chamber.

[0016] The following describes an oil and gas production evaluation method for shale according to an embodiment of the present invention.

[0017] According to an embodiment of the present invention, an oil and gas production evaluation method for shale is applied to the above-mentioned oil and gas production evaluation device, and the oil and gas production evaluation method includes: controlling the reaction component to make the reaction chamber reach a simulated environment, the simulated environment includes the reaction chamber being filled with inert gas and the reaction chamber reaching a preset pressure; controlling the heating component to heat the reaction chamber for a first preset time; controlling the centrifugal component to centrifuge the core for a second preset time; and controlling the reaction component to open an air inlet channel and an air outlet channel to collect the oil and gas products in the reaction chamber.

[0018] According to the oil and gas production evaluation method for shale according to the embodiment of the present invention, since the oil and gas production evaluation method is applied to the oil and gas production evaluation device of the above-mentioned embodiment, the oil and gas production evaluation method can more accurately calculate the content of movable oil and hydrocarbon gas in shale, is closer to the real data in actual production, and the measurement process has higher accuracy and reliability.

[0019] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which: Figure 1 is a schematic structural diagram of an oil and gas production evaluation device for shale according to an embodiment of the present invention; Figure 2 yes Figure 1 Schematic diagram of the structure of the reaction component and the clamping component; Figure 3 yes Figure 2 Schematic diagram of the structure of the reaction assembly and the clamping assembly after the cylindrical core is filled; Figure 4 yes Figure 2 Schematic diagram of the structure of the reaction assembly and the clamping assembly after the block core is filled; Figure 5 yes Figure 3 Schematic diagram of gas flow after inert gas is injected into the reaction component and the clamping component; Figure 6 is a schematic diagram of a structure in which a plurality of cores are loaded into an oil and gas production evaluation device according to an embodiment of the present invention; Figure 7 2 is a schematic diagram of the structure of the oil and gas production evaluation device filled with cores and counterweights according to an embodiment of the present invention; Figure 8 It is a flow chart of a method for evaluating oil and gas production of shale according to an embodiment of the present invention.

[0021] Reference numerals: 10. Oil and gas production evaluation device; 11. Heating assembly; 111. Heating chamber; 112. Base; 1121. Mounting slot; 113. Heating element; 114. Top cover; 12. Centrifugal assembly; 121. Centrifugal generator; 122. Rotating shaft; 123. Housing; 1231. Limiting groove; 124. Flip cover; 125. Spring hinge; 13. Reaction assembly; 131. Reaction chamber; 132. Air inlet channel; 1321. First control valve; 133. Air outlet channel; 1331. Second control valve; 134. First shell; 135. Second shell; 1351. Baffle; 136. Fixing member; 1361. Fixing end; 1362. Air vent channel; 1363. First through hole; 1364. Second through hole; 137. Elastic member; 138. Air inlet chamber; 14. Clamping assembly; 141. Fixing cavity; 142. Bottom plate; 1421. Air inlet; 143. Side plate; 1431. Air outlet; 144. Top plate; 15. Packing component; 16. Control component; 20. Core; 30. Counterweight. DETAILED DESCRIPTION

[0022] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0023] Reference below Figure 1-Figure 7 An oil and gas production evaluation device 10 for shale according to an embodiment of the present invention is described. The oil and gas production evaluation device 10 includes a heating component 11, a centrifugal component 12, a reaction component 13 and a clamping component 14.

[0024] A heating chamber 111 is formed in the heating assembly 11. The centrifugal assembly 12 is rotatably disposed in the heating chamber 111, and a limiting groove 1231 is formed on the centrifugal assembly 12. The reaction assembly 13 is disposed in the limiting groove 1231, and a reaction chamber 131 is formed in the reaction assembly 13, and an air inlet channel 132 and an air outlet channel 133 communicating with the reaction chamber 131 are formed on the reaction assembly 13. The clamping assembly 14 is disposed in the reaction chamber 131, and a fixed chamber 141 is formed inside the clamping assembly 14, and the fixed chamber 141 is suitable for accommodating the core 20, and an air inlet hole 1421 and an air outlet hole 1431 communicating with the fixed chamber 141 are formed on the clamping assembly 14, and the air inlet hole 1421 is communicated with the air inlet channel 132, and the air outlet hole 1431 is communicated with the air outlet channel 133.

[0025] At present, there is a lack of evaluation equipment for the production of movable oil and hydrocarbon gas in shale, and existing similar equipment has single functions and cannot meet the requirements of accurate quantitative evaluation under in-situ conditions, which restricts the precise exploration and efficient development of shale oil.

[0026] like Figure 1 and Figure 2 As shown, specifically, the oil and gas production evaluation device 10 may include a heating component 11, a centrifugal component 12, a reaction component 13 and a clamping component 14. A heating chamber 111 may be formed in the heating component 11. The heating component 11 may play a heating role, so that the temperature in the heating chamber 111 reaches a desired temperature, and the heating component 11 may also adjust the temperature to achieve heating or constant temperature, etc., to meet actual measurement requirements. The centrifugal component 12 may be arranged in the heating chamber 111, and the centrifugal component 12 may rotate in the heating chamber 111 to achieve a centrifugal effect, and a limiting groove 1231 may be formed on the centrifugal component 12.

[0027] The reaction component 13 can be arranged in the limiting groove 1231. Optionally, the reaction component 13 and the limiting groove 1231 are detachably connected by screws or bolts, or the reaction component 13 and the limiting groove 1231 are detachably connected by snapping or plugging. A reaction chamber 131 can be formed in the reaction component 13. An air inlet channel 132 and an air outlet channel 133 are also formed on the reaction component 13. The air inlet channel 132 and the air outlet channel 133 can be connected to the reaction chamber 131. A first control valve 1321 can be arranged at the air inlet channel 132, and a second control valve 1331 can be arranged at the air outlet channel 133. The first control valve 1321 and the second control valve 1331 can control the air flow of the air inlet channel 132 and the air outlet channel 133 respectively. In some embodiments, the number of the air inlet channels 132 can be multiple, and the multiple air inlet channels 132 can be symmetrically distributed with the air outlet channel 133 as the center.

[0028] Further, the clamping assembly 14 can be arranged in the reaction chamber 131, and a fixed cavity 141 can be formed inside the clamping assembly 14, and the fixed cavity 141 can be used to accommodate the core 20, and the core 20 can be a shale sample, and the core 20 can be columnar or block-shaped, and an air inlet 1421 and an air outlet 1431 can be formed on the clamping assembly 14, and the air inlet 1421 and the air outlet 1431 can be communicated with the fixed cavity 141 respectively, and the air inlet 1421 can be communicated with the air inlet channel 132, and the air outlet 1431 can be communicated with the air outlet channel 133, as shown in FIG. Figure 3 and Figure 5 As shown, when the inert gas is guided to the inlet hole 1421 through the inlet channel 132, it enters the core 20 in the fixed cavity 141 through the inlet hole 1421, and then is guided from the inside of the core 20 to the outlet hole 1431, and finally is guided from the outlet hole 1431 to the outlet channel 133 and discharged.

[0029] It should be noted that the reaction component 13 can introduce a certain flow of inert gas such as nitrogen or carbon dioxide into the reaction chamber 131 through the air inlet channel 132 to discharge the oxygen in the reaction chamber 131, thereby avoiding affecting the evaluation result. The reaction component 13 can also increase the air pressure in the reaction chamber 131 by continuously injecting inert gas to simulate the pressure of shale in the ground. The heating component 11 can heat the core 20 in the reaction chamber 131 to pyrolyze the organic matter in the core to produce oil and gas, and gasify the produced movable oil and hydrocarbon gas. The centrifugal component 12 discharges the oil and gas in the core 20 into the reaction chamber 131 through centrifugal action, so as to facilitate the staff to conduct The oil and gas production evaluation device 10 can be used to collect oil and gas, thereby more accurately measuring the content of movable oil and hydrocarbon gas in the core 20 to determine whether the shale oil here meets the development conditions, improve the accuracy of quantitative evaluation, and promote the precise exploration and efficient development of shale oil. The oil and gas production evaluation device 10 can be applied to the determination of movable oil and hydrocarbon gas in various unconventional oil and gas resources such as medium-low maturity shale oil, medium-high maturity shale oil, shale gas, tight oil, oil shale and oil-rich coal. It has a wide range of applications and can realize on-demand adjustment and automatic control of pyrolysis temperature, ambient pressure, centrifugal speed, experimental time and sample quantity, and can perform simulation tests in various inert atmosphere environments and under different mining processes. It has comprehensive functions and strong practicality.

[0030] In short, the oil and gas production evaluation device 10 of the embodiment of the present invention is provided with a heating component 11, a centrifugal component 12, a reaction component 13 and a clamping component 14. The clamping component 14 can be used to fix the core 20, the reaction component 13 can pressurize the reaction chamber 131 to simulate the pressure of shale in the underground, the heating component 11 can heat the core 20, the centrifugal component 12 can discharge the oil and gas in the core 20 into the reaction chamber 131, and the reaction component 13 can collect the oil and gas through the gas outlet channel 133 to facilitate the measurement of the oil and gas, thereby more accurately calculating the content of movable oil and hydrocarbon gas in the shale, which is close to the real data in actual production, and the measurement process has higher accuracy and reliability.

[0031] like Figures 2 to 4As shown, in some embodiments of the present invention, the reaction component 13 may include a first shell 134 and a second shell 135. The first shell 134 may be arranged in the limiting groove 1231, and a fixing member 136 may be arranged in the first shell 134. The fixing member 136 may abut against the inner wall of the first shell 134 to fix the fixing member 136. Optionally, the fixing member 136 and the inner wall of the first shell 134 may be interference fit. A fixing end 1361 may be formed on one side of the fixing member 136 along the first direction, and the fixing end 1361 may be used to fix the clamping component 14. Specifically, the fixing end 1361 is limitedly fitted with one end of the clamping component 14 along the first direction. The second shell 135 may be arranged on one side of the first shell 134 along the first direction, and the second shell 135 can be sealed and connected to the first shell 134.

[0032] In some embodiments, an extension portion extending toward the first shell 134 is formed on the second shell 135, and the extension portion can extend into the first shell 134 and cooperate with the inner wall of the first shell 134. Optionally, the extension portion and the first shell 134 can be connected by a thread, or a seal is provided between the extension portion and the first shell 134, and the extension portion and the first shell 134 are interfered with. An air inlet channel 132 and an air outlet channel 133 may be formed on the second shell 135. The air inlet channel 132 and the air outlet channel 133 may be arranged through the second shell 135 along the first direction. An elastic member 137 may be arranged on the inner wall of the second shell 135. The elastic member 137 may be connected to the other end of the clamping assembly 14 along the first direction. The elastic member 137 may apply a thrust toward the fixing member to the clamping assembly 14 so as to fix the clamping assembly 14 at the fixing end 1361. It can be understood that the fixing end 1361 and the elastic member 137 may respectively fix the two ends of the clamping assembly 14 along the first direction, thereby improving the stability of the clamping assembly 14.

[0033] like Figure 1 and Figure 2 As shown, in some embodiments of the present invention, a baffle 1351 may be provided on the side of the second shell 135 facing the clamping assembly 14, the baffle 1351 can extend toward the fixing member 136, and the free end of the baffle 1351 can be connected to the fixing member 136, wherein a reaction chamber 131 may be formed between the baffle 1351, the fixing member 136 and the second shell 135, the baffle 1351 may be located at the periphery of the clamping assembly 14, when the centrifugal assembly 12 is working, the oil and gas in the core 20 are guided to the baffle 1351 under the influence of centrifugal force, ensuring that the oil and gas can be discharged after the subsequent gas outlet channel 133 is opened, and under some working conditions, part of the oil and gas will liquefy and adhere to the baffle 1351 and the sealing member 15 for subsequent collection.

[0034] like Figure 3and Figure 5 As shown, in some embodiments of the present invention, an air inlet cavity 138 may be formed between the outer wall of the baffle 1351 and the inner wall of the first shell 134, and the air inlet cavity 138 can be communicated with the air inlet channel 132. The fixing member 136 may be formed with an air vent channel 1362 and a first through hole 1363 and a second through hole 1364 communicated with the air vent channel 1362, the first through hole 1363 can be directly opposite to and communicated with the air inlet cavity 138, and the second through hole 1364 can be arranged corresponding to and communicate with the air inlet hole 1421. Connected, under actual working conditions, the inert gas can enter into the air inlet chamber 138 through the air inlet channel 132, and then be guided to the air vent channel 1362 through the first through hole 1363, and then be guided to the air inlet hole 1421 through the second through hole 1364. Therefore, the fixing member 136 can limit the clamping assembly 14 and guide the gas. The fixing member 136 and the baffle 1351 can also separate the air inlet chamber 138 from the reaction chamber 131, thereby facilitating the collection and measurement of oil and gas.

[0035] like Figure 2 and Figure 3 As shown, in some embodiments of the present invention, the clamping assembly 14 may include a bottom plate 142, a side plate 143 and a top plate 144, the bottom plate 142 may be disposed on the fixing member 136, and the bottom plate 142 may be limitedly matched with the fixing end 1361, optionally, the outer peripheral wall of the bottom plate 142 and the fixing end 1361 may be interference-fitted, a portion of the bottom plate 142 may be disposed corresponding to the second through hole 1364, and an air inlet hole 1421 may be formed on the bottom plate 142, and the number of the air inlet holes 1421 may be The number of air inlet holes 1421 can be multiple, and the multiple air inlet holes 1421 can be spaced apart on the bottom plate 142. The side plate 143 can be arranged on the side of the bottom plate 142 away from the fixing member 136, and the side plate 143 can extend along the first direction. The side plate 143 can be formed with air outlet holes 1431. The number of air outlet holes 1431 can be multiple, and the multiple air outlet holes 1431 can be spaced apart on the side plate 143. The top plate 144 can be arranged at the free end of the side plate 143, and the top plate 144 can cooperate with the side plate 143.

[0036] Optionally, the top plate 144 and the side plate 143 can be connected by threads, or the top plate 144 and the side plate 143 can be connected by interference fit, and the side of the top plate 144 away from the side plate 143 can be connected to the elastic member 137. In actual operation, the top plate 144 can be removed from the side plate 143 first, and then the core 20 can be placed in the fixing cavity 141, and then the top plate 144 can be connected to the side plate 143, so as to limit the core 20, wherein a fixing cavity 141 can be defined between the bottom plate 142, the side plate 143 and the top plate 144.

[0037] like Figure 2 and Figure 3As shown, in some embodiments of the present invention, the oil and gas production evaluation device 10 may include a packing 15, which may be accommodated in the reaction chamber 131, and the packing 15 may be arranged around the outer peripheral wall of the side plate 143. Along the first direction, one end of the packing 15 can abut against the fixed end 1361, and the other end of the packing 15 can abut against the top plate 144, ensuring that the packing 15 can completely cover the gas outlet 1431. Specifically, the packing 15 can be constructed as a packing net, and the packing 15 has an extremely small aperture. Therefore, the packing 15 can pass through the oil and gas and block the core 20 debris from passing through. When the centrifugal assembly 12 centrifuges the core 20, the oil and gas in the core 20 can be discharged through the gas outlet 1431 and the packing 15, and the core 20 debris can be blocked by the packing 15 in the fixed chamber 141, which is helpful to measure the weight of the core 20 debris and improves the accuracy and reliability of the measurement.

[0038] like Figure 1 As shown, in some embodiments of the present invention, the centrifugal assembly 12 may include a centrifugal generator 121, a rotating shaft 122, a shell 123 and a flap 124. The centrifugal generator 121 may be arranged on the heating assembly 11, and the centrifugal generator 121 may be used as a driving device, such as a motor used in a traditional centrifuge, or a vibrator used in a vibrating screen, etc. The rotating shaft 122 may be connected to the centrifugal generator 121 by power, and the centrifugal generator 121 may drive the rotating shaft 122 to rotate. The shell 123 may be connected to the free end of the rotating shaft 122. When the rotating shaft 122 rotates, the shell 123 can rotate synchronously with the rotating shaft 122, and a limiting groove 1231 may be formed on the shell 123. The flap 124 may be movably arranged on the shell 123, and the flap 124 may be used to fix the reaction assembly 13 in the limiting groove 1231. Optionally, the flap 124 and the shell 123 may be connected by a spring hinge 125, and the flap 124 may be rotated to limit the reaction assembly 13 along the first direction. The oil and gas production evaluation device 10 may further include a control component 16, which may be disposed at the centrifugal generator 121. The control component 16 is used to control the centrifugal assembly 12 and the heating assembly 11 to achieve functions such as programmed temperature increase, constant temperature, different rotation speeds, and centrifugal time.

[0039] like Figure 6 and Figure 7As shown, in some embodiments of the present invention, there can be multiple shells 123, the bottom ends of the multiple shells 123 can be connected to the rotating shaft 122, and the multiple shells 123 can be symmetrically arranged along the axis of the rotating shaft 122, so as to ensure that the center of gravity of the multiple shells 123 is located at the center of gravity of the rotating shaft 122, and the stability of the multiple shells 123 during the centrifugation process is ensured, and multiple shells 123 can be used to test multiple cores 20, thereby improving the measurement accuracy. When the number of cores 20 to be measured is less than the number of shells 123, the excess shells 123 can add counterweights 30 to the fixed cavity 141 to balance the weight. The counterweight 30 can be a specially made cylinder with an adjustable mass whose outer diameter and height match the fixed cavity 141.

[0040] like Figure 1 As shown, in some embodiments of the present invention, the heating component 11 may include a base 112, a heating element 113 and a top cover 114. A mounting groove 1121 may be formed at the top of the base 112. The mounting groove 1121 may be used to install the centrifugal generator 121 to limit the position of the centrifugal generator 121. The heating element 113 may be arranged at the top of the base 112, and the heating element 113 may extend along a first direction. In some embodiments, the heating element 113 may be a heating ring to achieve heating of the central area. The top cover 114 may be arranged at the free end of the heating element 113. The top cover 114 is detachably connected to the heating element 113 to facilitate the placement or removal of the reaction component 13, wherein the base 112, the heating element 113 and the top cover 114 define a heating chamber 111.

[0041] The following describes an oil and gas production evaluation method according to an embodiment of the present invention.

[0042] like Figure 8 As shown, the oil and gas production evaluation method for shale according to an embodiment of the present invention is applied to the oil and gas production evaluation device of the above embodiment, and the oil and gas production evaluation method includes: S1. Control the reaction assembly so that the reaction chamber reaches the simulated environment. The simulated environment includes that the reaction chamber is filled with inert gas and the reaction chamber reaches the preset pressure. First, weigh the core of a specific size. The initial mass of the core can be recorded as M0. Then place the core in the fixed cavity. After tightening the top plate, wrap the sealing member around the outer periphery of the side plate and place it in the reaction chamber. After installing the elastic member, tighten the second shell with the first shell. Then place the reaction assembly in the limit groove and fix it. Then inject inert gas into the reaction chamber through the air inlet channel. The inert gas passes through the air inlet channel, the air inlet cavity, the first through hole, the ventilation channel, the second through hole and the air inlet hole in turn into the core, and purges the core evenly and stably. Then, pass through the sealing member from the air outlet to enter another part of the reaction chamber. It should be noted that during the gas injection process, the gas pressure change inside the reaction chamber should be detected in real time until the preset pressure P0 is reached inside the reaction chamber. P0 satisfies the relationship: 0<P0≤30MPa, thereby simulating the pressure environment of the core underground.

[0043] S2, control the heating component to heat the reaction chamber for a first preset time. After the preset pressure P0 is reached in the reaction chamber, turn on the heating component to heat the core to a preset temperature T0 at a specific heating rate, and then maintain the core at the preset temperature T0 for a first preset time t1 to ensure that the core can fully react. In this process, the second control valve can be used to control the opening of the gas outlet channel to release part of the gas to adjust the internal gas pressure of the reaction chamber and stabilize it at the preset pressure P0, wherein the preset temperature T0 satisfies the relationship: 30℃≤T0≤600℃, and the first preset time t1 satisfies the relationship: 0<t1≤10h.

[0044] S3, control the centrifugal assembly to centrifuge the core and continue for the second preset time. After the heating assembly continues for the first preset time t1, turn on the centrifugal assembly, and set the preset speed r0 and the second preset time t2, so that the movable oil inside the core is thrown out and thrown to the baffle through the vent and the packing. Due to the obstruction of the packing, the core is still bound in the fixed cavity. Among them, the preset speed r0 satisfies the relationship: 0<r0≤10000r / min, and the second preset time t2 satisfies the relationship: 0<t2≤2h.

[0045] S4, control the reaction component to open the air inlet channel and the air outlet channel to collect the oil and gas products in the reaction chamber. After the centrifugal component is opened for the second preset time t2, control the second control valve to open the air outlet channel, and cool and collect the oil and gas in real time outside. After the pressure is released, control the first control valve to open the air inlet channel and pass a certain flow of nitrogen or carbon dioxide and other inert gases through the air inlet channel to purge the oil and gas products inside the core and the reaction chamber, so that they are released from the air outlet channel to the greatest extent, and record the collected oil mass as m1 and the water mass as m2. After the third preset purge time t3, stop the gas injection and turn off the heating component , the third preset time satisfies the relationship: 0.5≤t3≤1h. After cooling to room temperature, the core is taken out and weighed here, and the mass is recorded as M1. At the same time, the residual oil in the sealing part and the reaction chamber is collected by organic solvent and weighed and recorded as m3. The calculation method of the mass and proportion of each product in the shale is as follows: the amount of movable oil produced: m1+m3, the proportion of movable oil produced: (m1+m3) / M0, the amount of shale gas produced: M0-M1-m1-m2-m3, the proportion of shale gas produced: (M0-M1-m1-m2-m3) / M0.

[0046] According to the oil and gas production evaluation method for shale according to the embodiment of the present invention, since the oil and gas production evaluation method is applied to the oil and gas production evaluation device of the above-mentioned embodiment, the oil and gas production evaluation method can more accurately calculate the content of movable oil and hydrocarbon gas in shale, is closer to the real data in actual production, and the measurement process has higher accuracy and reliability.

[0047] In the first implementation case of the present invention, the sample is low-middle-mature shale with a columnar shape, an initial mass M0 of 100 g, one shell, a reaction chamber filled with a columnar core, a nitrogen injection heating process, a preset pressure P0 of 10 MPa, a preset temperature T0 of 350°C, a heating rate of 10°C / min, a first preset time t1 of 2h, a preset rotation speed r0 of 2500r / min, a second preset time t2 of 1h, and a third preset time t3 of 30min.

[0048] Before use, a single columnar core is weighed with an initial mass of 100 g. The core is then placed in a fixed cavity. After tightening the top plate, the sealing member is wrapped around the outer periphery of the side plate and placed in the reaction chamber. After installing the elastic member, the second shell is tightened with the first shell. The reaction assembly is then placed in the limit groove and fixed. Nitrogen is then injected into the reaction chamber through the air inlet channel. During the gas injection process, the gas pressure change inside the reaction chamber is detected in real time until the preset pressure of 10 MPa is reached inside the reaction chamber. The heating assembly is turned on to heat the core to a preset temperature of 350°C at a heating rate of 10°C / min. The core is then maintained at the preset temperature of 350°C for the first preset time of 2 hours to allow the core to react fully. During this process, the second control valve can be used to control the opening of the gas outlet channel to release part of the gas to adjust the gas pressure inside the reaction chamber and stabilize it at a preset pressure of 10 MPa.

[0049] After the heating component has been heated for 2 hours, the gas injection pipeline is removed, the top cover is closed, and the preset speed is set to 2500r / min. After the second preset time of 1 hour, the centrifugal component is opened to allow the movable oil inside the core to be thrown out and thrown to the baffle through the air outlet and the sealing member.

[0050] After the centrifugal assembly is opened for 1 hour, the outlet valve is opened to release the oil and gas, and the oil and gas are cooled and collected in real time outside. After the pressure is released, the first control valve is controlled to open the air inlet channel and a certain flow of nitrogen is introduced through the air inlet channel to purge the oil and gas products in the core and the reaction chamber, so that it can be released from the outlet valve to the greatest extent. The collected oil mass is recorded as m1 (m1=3.82g), and the water mass is recorded as m2 (m2=1.05g). After purging for 30 minutes, the gas injection is stopped, the heating assembly is turned off, and after the device is cooled to room temperature, the core is taken out and weighed again, and the mass is recorded as M1 (M1=92.28g). At the same time, the residual oil in the packing and the reaction chamber is collected by organic solvent and weighed and recorded as m3 (m3=0.94g). Finally, the entire device is cleaned for next use.

[0051] The calculation method for the mass and proportion of each product in the shale after the experiment is as follows: the amount of movable oil produced: m1+m3=3.82+0.94=4.76g, the proportion of movable oil produced: (m1+m3) / M0=4.76 / 100=4.76%; the amount of shale gas produced: M0-M1-m1-m2-m3=100-92.28-3.82-1.05-0.94=1.91g, the proportion of shale gas produced: (M0-M1-m1-m2-m3) / M0=1.91 / 100=1.91%.

[0052] In the second implementation case of the present invention, the sample is oil shale in the shape of fragments, with an initial mass M0 of 100g, two shells, one reaction chamber filled with columnar oil shale cores, and the other reaction chamber filled with counterweights of equal weight. The carbon dioxide injection heating process is adopted, the preset pressure P0 is 20MPa, the preset temperature T0 is 550°C, the heating rate is 5°C / min, the first preset time t1 is 1h, the preset rotation speed r0 is 5000r / min, the second preset time t2 is 0.5h, and the third preset time t3 is 40min.

[0053] Before use, the broken oil shale core is weighed, with an initial mass of 100g. The core is then placed in a fixed cavity. After tightening the top plate, the sealing member is wrapped around the outer periphery of the side plate and placed in the reaction chamber. After installing the elastic member, the second shell is tightened with the first shell. The reaction assembly is then placed in the limit groove and fixed. Carbon dioxide is then injected into the reaction chamber through the air inlet channel. During the gas injection process, the gas pressure change inside the reaction chamber is detected in real time until the preset pressure of 20MPa is reached inside the reaction chamber. The heating assembly is turned on to heat the core to a preset temperature of 550°C at a heating rate of 5°C / min. The core is then maintained at a preset temperature of 550°C for a first preset time of 1h to allow the core to react fully. During this process, the second control valve can be used to control the opening of the gas outlet channel to release part of the gas to adjust the gas pressure inside the reaction chamber and stabilize it at a preset pressure of 20MPa.

[0054] After the heating component has been heated for 1 hour, the gas injection pipeline is removed, the top cover is closed, and the preset speed is set to 5000r / min. After the second preset time of 0.5h, the centrifugal component is opened to allow the movable oil inside the core to be thrown out and thrown to the baffle through the air outlet and the sealing member.

[0055] After the centrifugal assembly is opened for 0.5h, the outlet valve is opened to release the oil and gas, and the oil and gas are cooled and collected in real time outside. After the pressure is released, the first control valve is controlled to open the air inlet channel and a certain flow of nitrogen is introduced through the air inlet channel to purge the oil and gas products in the core and the reaction chamber, so that it can be released from the outlet valve to the maximum extent. The collected oil mass is recorded as m1 (m1=13.43g), and the water mass is recorded as m2 (m2=4.21g). After purging for 40min, the gas injection is stopped, the heating assembly is turned off, and after the device is cooled to room temperature, the core is taken out and weighed again, and the mass is recorded as M1 (M1=75.74g). At the same time, the residual oil in the packing and the reaction chamber is collected by organic solvent and weighed and recorded as m3 (m3=1.68g). Finally, the entire device is cleaned for next use.

[0056] The calculation method for the mass and proportion of each product in the shale after the experiment is as follows: the amount of movable oil produced: m1+m3=13.43+1.68=15.11g, the proportion of movable oil produced: (m1+m2) / M0=15.11 / 100=15.11%; the amount of shale gas produced: M0-M1-m1-m2-m3=100-75.74-13.43-4.21-1.68=4.94g, the proportion of shale gas produced: (M0-M1-m1-m2-m3) / M0=4.94 / 100=4.94%.

[0057] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0058] In the description of the present invention, "first feature" or "second feature" may include one or more of the features.

[0059] In the description of the present invention, "plurality" means two or more.

[0060] In the description of the present invention, a first feature being “on” or “under” a second feature may include that the first and second features are directly in contact with each other, or may include that the first and second features are not in direct contact with each other but are in contact with each other via another feature therebetween.

[0061] In the description of the present invention, “on”, “over” and “above” a first feature from a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0062] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0063] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A device for evaluating oil and gas production in shale, characterized in that: include: A heating component, wherein a heating cavity is formed in the heating component; A centrifugal assembly, the centrifugal assembly is rotatably disposed in the heating chamber, and a limiting groove is formed on the centrifugal assembly; A reaction component, wherein the reaction component is disposed in the limiting groove, a reaction chamber is formed in the reaction component, and an air inlet channel and an air outlet channel communicating with the reaction chamber are formed on the reaction component; A clamping assembly, wherein the clamping assembly is arranged in the reaction chamber and a fixed cavity is formed inside the clamping assembly, the fixed cavity is suitable for accommodating the core, and an air inlet hole and an air outlet hole connected to the fixed cavity are formed on the clamping assembly, the air inlet hole is connected to the air inlet channel, and the air outlet hole is connected to the air outlet channel.

2. The oil and gas production evaluation device for shale according to claim 1, characterized in that: The reaction assembly comprises: A first shell, wherein the first shell is disposed in the limiting groove, a fixing member is disposed in the first shell, a fixing end is formed on one side of the fixing member along the first direction, and the fixing end is limitedly matched with one end of the clamping assembly along the first direction; The second shell is arranged on one side of the first shell along the first direction and is sealed with the first shell, the air inlet channel and the air outlet channel are formed on the second shell, and the inner wall of the second shell is formed with an elastic member connected with the other end of the clamping assembly along the first direction.

3. The oil and gas production evaluation device for shale according to claim 2, characterized in that: A baffle is provided on one side of the second shell facing the clamping assembly, and a free end of the baffle is connected to the fixing member; Wherein, the reaction chamber is formed between the baffle, the fixing member and the second shell.

4. The oil and gas production evaluation device for shale according to claim 3, characterized in that: An air inlet cavity is formed between the outer wall of the baffle and the inner wall of the first shell, and the fixing member forms an air vent and a first through hole and a second through hole connected to the air vent, the first through hole is connected to the air inlet cavity, and the second through hole is arranged corresponding to the air inlet hole.

5. The oil and gas production evaluation device for shale according to claim 4, characterized in that: The clamping assembly comprises: A bottom plate, the bottom plate is arranged on the fixing member and is limitedly matched with the fixing end, a part of the bottom plate is arranged corresponding to the second through hole, and the air inlet hole is formed on the bottom plate; a side plate, the side plate being arranged on a side of the bottom plate away from the fixing member and extending along the first direction, the side plate being formed with the air outlet; A top plate, the top plate is arranged at the free end of the side plate and matched with the side plate, and the top plate is connected to the elastic member; Wherein, the bottom plate, the side plate and the top plate define the fixing cavity.

6. The oil and gas production evaluation device for shale according to claim 5, characterized in that: Also includes: A sealing member is received in the reaction chamber and is disposed around the outer peripheral wall of the side plate. Along the first direction, one end of the sealing member abuts against the fixed end, and the other end of the sealing member abuts against the top plate.

7. The oil and gas production evaluation device for shale according to claim 1, characterized in that: The centrifugal assembly comprises: A centrifugal generator, wherein the centrifugal generator is disposed on the heating component; a rotating shaft, the rotating shaft being dynamically connected to the centrifugal generator; A shell, the bottom end of which is connected to the free end of the rotating shaft, and the limiting groove is formed on the shell; A flip cover is movably disposed on the housing and is suitable for fixing the reaction component in the limiting groove.

8. The oil and gas production evaluation device for shale according to claim 7, characterized in that: There are multiple shells, the bottom ends of the multiple shells are connected to the rotating shaft, and the multiple shells are symmetrically arranged along the axis of the rotating shaft.

9. The oil and gas production evaluation device for shale according to claim 7, characterized in that: The heating assembly comprises: A base, wherein a top of the base is provided with a mounting groove suitable for mounting the centrifugal generator; A heating element, the heating element is disposed on the top of the base and extends along a first direction; A top cover, the top cover being arranged at a free end of the heating element; Wherein, the base, the heating element and the top cover define the heating chamber.

10. A method for evaluating oil and gas production in shale, characterized in that: The oil and gas production evaluation method is applied to the oil and gas production evaluation device according to any one of claims 1 to 9, and the oil and gas production evaluation method comprises: Controlling the reaction assembly to make the reaction chamber reach a simulated environment, wherein the simulated environment includes the reaction chamber being filled with an inert gas and the reaction chamber reaching a preset pressure; Controlling the heating component to heat the reaction chamber for a first preset time; Controlling the centrifugal assembly to centrifuge the core for a second preset time; The reaction component is controlled to open an air inlet channel and an air outlet channel to collect the oil and gas products in the reaction chamber.

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