阅读说明：本技术 支撑剂抗破碎能力的确定方法、支撑剂破碎装置及系统 (Determination method for anti-crushing capacity of proppant, proppant crushing device and system ) 是由 彭欢 马辉运 彭钧亮 高新平 秦毅 黄玲 杨毅 张晓芳 肖勇军 于 2019-01-31 设计创作，主要内容包括：本发明公开了一种支撑剂抗破碎能力的确定方法、支撑剂破碎装置及系统,涉及油气田开发技术领域,该方法包括确定支撑剂样品的第一平均直径；将第一质量的支撑剂样品浸泡在第一液体中,并获取第一液体的第一浊度；对第二质量的支撑剂样品进行破碎处理得到目标支撑剂样品；将目标支撑剂样品浸泡在第二液体中,并获取第二液体的第二浊度；确定烘干后的目标支撑剂样品的第二平均直径；根据第一平均直径与第二平均直径,确定破碎后的支撑剂样品的平均直径；根据第一浊度与第二浊度,确定破碎后的支撑剂样品对浊度的影响程度,进而确定支撑剂样品的抗破碎能力。该方法模拟了实际的地层环境,有效提高了确定出的支撑剂抗破碎能力的准确性。(The invention discloses a method for determining the anti-crushing capacity of a proppant, a proppant crushing device and a proppant crushing system, and relates to the technical field of oil and gas field development; soaking a first mass of a proppant sample in a first liquid and obtaining a first turbidity of the first liquid; crushing the proppant sample with the second mass to obtain a target proppant sample; soaking the target proppant sample in a second liquid and obtaining a second turbidity of the second liquid; determining a second average diameter of the dried target proppant sample; determining the average diameter of the crushed proppant sample according to the first average diameter and the second average diameter; and determining the influence degree of the crushed proppant sample on the turbidity according to the first turbidity and the second turbidity, and further determining the crushing resistance of the proppant sample. The method simulates the actual formation environment and effectively improves the accuracy of the determined anti-crushing capacity of the proppant.)

1. A method of determining the fracture resistance of a proppant, the method comprising:

determining a first average diameter of the proppant sample;

soaking a first mass of the proppant sample in a first liquid and obtaining a first turbidity of the first liquid soaked with the first mass of the proppant sample;

performing crushing treatment on the proppant sample with the second mass to obtain a target proppant sample, wherein the crushing treatment comprises: heating the second mass of proppant sample and applying axial pressure and pore pressure;

soaking the target proppant sample in a second liquid and obtaining a second turbidity of the second liquid soaked with the target proppant sample, the first liquid and the second liquid being of the same type;

determining a second average diameter of the dried target proppant sample;

determining the average diameter of the crushed proppant sample according to the first average diameter and the second average diameter;

determining the influence degree of the crushed proppant sample on turbidity according to the first turbidity and the second turbidity;

and determining the crushing resistance of the proppant sample according to the average diameter of the crushed proppant sample and the influence degree of the crushed proppant sample on turbidity.

2. The method for determining the fracture resistance of a proppant as set forth in claim 1, wherein said determining the average diameter of the fractured proppant sample from the first average diameter and the second average diameter comprises:

determining the average diameter of the crushed proppant sample according to the first average diameter, the second average diameter and a first evaluation formula,

the first evaluation formula is as follows: p_Average＝(D₁-D₂)/D₁，

Wherein, D is₁Represents the first mean diameter, D₂Represents the second average diameter, the P_AverageThe mean diameter is indicated.

3. The method for determining the fracture resistance of a proppant as set forth in claim 1, wherein said determining the effect of the fractured proppant sample on the turbidity from the first turbidity and the second turbidity comprises:

determining the influence degree of the crushed proppant sample on the turbidity according to the first turbidity, the second turbidity and a second evaluation formula,

the second evaluation formula is: p_{Turbid urine}＝(Z₂-Z₁)/Z₁，

Wherein, Z is₁Represents the first turbidity, the Z₂Represents the second turbidity, the P_{Turbid urine}Represents the average turbidity.

4. The method for determining the fracture resistance of a proppant as set forth in claim 1, wherein said determining a first average diameter of a proppant sample comprises:

obtaining n kinds of screens with different screen meshes, wherein n is a positive integer;

screening the proppant samples through the n kinds of screens according to the ascending order of the mesh number of the screens to obtain n kinds of proppant particles which are in one-to-one correspondence with the n kinds of screens;

obtaining a mass of each proppant particle of the n proppant particles;

determining the average diameter of the pore diameter of each two adjacent screens in the n screens according to the ascending order of the mesh number of the screens;

determining a first average diameter D of the proppant sample according to the mass of each proppant particle in the n proppant particles, the average diameter of the pore diameters of each two adjacent screens and a first average diameter calculation formula₁；

The first mean diameter calculation formula is:

wherein fi is the proportion of the mass of one proppant particle screened by the ith screen to the mass of the proppant sample, and Ci is the average value of the aperture of the ith-1 screen and the aperture of the ith screen.

5. The method for determining the fracture resistance of the proppant as set forth in claim 1, wherein the determining a second average diameter of the dried target proppant sample comprises:

obtaining n kinds of screens with different screen meshes, wherein n is a positive integer;

screening the dried target proppant sample through the n kinds of screens according to the ascending order of the mesh number of the screens to obtain n kinds of proppant particles which are in one-to-one correspondence with the n kinds of screens;

obtaining a mass of each proppant particle of the n proppant particles;

determining the average diameter of the pore diameter of each two adjacent screens in the n screens according to the ascending order of the mesh number of the screens;

determining a second average diameter D of the dried target proppant sample according to a calculation formula of the mass of each proppant particle in the n proppant particles, the average diameter of the pore diameters of every two adjacent screens and the second average diameter₂；

The second average diameter calculation formula is as follows:

wherein gi is the ratio of the mass of one proppant particle screened by the ith screen to the mass of the proppant sample, and Di is the average of the pore diameter of the ith-1 screen and the pore diameter of the ith screen.

6. A method for determining the fracture resistance of a proppant as set forth in any one of claims 1 to 5, wherein said soaking said target proppant sample in a second liquid is preceded by:

sequentially relieving the axial pressure and the pore pressure exerted on the target proppant sample.

7. A proppant breaking device, comprising: a container, an axial pressure structure, a pore pressure structure and a heating structure,

wherein the container is used for accommodating a proppant sample;

at least a portion of the axial pressure structure disposed within the container, the axial pressure structure configured to apply an axial pressure to a proppant sample within the container;

the pore pressure structure in communication with the container, the pore pressure structure configured to output a pressure transmission medium to a proppant sample within the container to apply a pore pressure to the proppant sample through the pressure transmission medium;

the heating structure is configured to heat a proppant sample within the container.

8. The proppant breaking device of claim 7, wherein the axial pressure structure comprises first and second oppositely disposed pressure members,

the first pressure piece is fixedly arranged in the container, the second pressure piece is configured to move towards or away from the first pressure piece, and the first pressure piece, the second pressure piece and the side wall of the container form a closed containing cavity which is used for filling a proppant sample.

9. The proppant breaking device of claim 8, wherein the container is open at one end, the second pressure member comprising: the pressing piece is configured to move towards or away from the first pressure piece through the opening under the driving of the driving piece.

10. The proppant breaking device of claim 9, wherein the other end of the container is open, the first pressure member comprises a pressure-bearing member and a base which are fixedly connected, the pressure-bearing member is clamped in the container through the opening, and the base is located outside the container.

11. The proppant breaking device according to claim 10, wherein the container is a tubular container, the pressing member and the pressure-bearing member are cylindrical structures, the outer diameters of the pressing member and the pressure-bearing member are matched with the inner diameter of the container, the first pressure member is provided with a medium channel, one end of the medium channel is communicated with the containing cavity, and the other end of the medium channel is connected with the pore pressure structure, and the medium channel is used for the pressure transmission medium to pass through.

12. A proppant breaking apparatus according to any one of claims 7 to 10 wherein the pore pressure structure is a pore pressure booster pump.

13. A proppant breaking apparatus as set forth in any one of claims 7 to 10 wherein said heating structure is an electrically heated jacket sleeved over the outer wall of said container.

14. A proppant fracturing system, comprising a proppant fracturing device and a control assembly,

the proppant breaking device of any one of claims 7 to 13, the control assembly being electrically connected to an axial pressure structure, a pore pressure structure, and a heating structure in the proppant breaking device,

the control assembly is used for controlling the axial pressure structure to apply axial pressure to the proppant sample, controlling the pore pressure structure to apply pore pressure to the proppant sample, and controlling the heating structure to heat the proppant sample;

the control assembly is further configured to:

determining a first average diameter of the proppant sample;

after immersing the first mass of the proppant sample in a first liquid, obtaining a first turbidity of the first liquid in which the first mass of the proppant sample is immersed;

obtaining a second turbidity of the second liquid soaked with a target proppant sample, the first liquid and the second liquid being of the same type, the target proppant sample being a proppant sample obtained by crushing a second mass of the proppant sample, the crushing comprising: heating the second mass of proppant sample and applying axial pressure and pore pressure;

determining a second average diameter of the dried target proppant sample;

determining the average diameter of the crushed proppant sample according to the first average diameter and the second average diameter;

determining the influence degree of the crushed proppant sample on turbidity according to the first turbidity and the second turbidity;

and determining the crushing resistance of the proppant sample according to the average diameter of the crushed proppant sample and the influence degree of the crushed proppant sample on turbidity.