Large physical modeling experiment device for simulating hydraulic fracturing and casing damage under in-situ condition, and method

Abstract

The invention relates to the field of petroleum and natural gas engineering, in particular to a large physical modeling experiment device for simulating well spacing and in-situ injection and production. The large physical modeling experiment device comprises a physical modeling body unit, an axial pressure loading unit, a radial pressure loading unit, a high-pressure injection unit, a temperatureloading unit, a monitoring unit and a data processing unit. The invention further discloses a method for conducting experiments through the experiment device. The large physical modeling experiment device and the method have the advantages of being suitable for carrying out the various physical simulation experiments of hydraulic fracturing, rock water swelling to cause casing deformation, rock slipping to cause casing damage and the like, and capable of quickly and effectively completing the various casing damage physical simulation experiments.

Description

technical field [0001] The invention relates to the field of petroleum and natural gas engineering, in particular to a large-scale physical model experimental device and method for simulating hydraulic fracturing and casing damage under in-situ conditions. Background technique [0002] With the development of oilfield development, casing damage is a common problem in various oilfields. At present, the speed of casing damage is increasing year by year, which has seriously affected the production of major oil fields and caused huge losses in manpower, material and financial resources. [0003] In many projects, before the fracturing operation, the well was passed smoothly. After the fracturing, the drill plug could not pass through, or the lower bridge plug could not pass through. The deformation of the casing occurred during the hydraulic fracturing process. This shows that fracturing is the casing. Engineering factors of deformation. The fracturing factors related to casin...

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Problems solved by technology

[0004] Nowadays, the experimental devices and methods for studying hydraulic fracturing and casing damage are still limited. Patents CN 108104786A, CN 108240942 A, and CN 103993867 B all only publish experimental systems and methods for fracturing, and do not involve casing damage; 107941621 A discloses a rock true triaxial hydraulic fracturing strain characteristic testing device, although the strain in the hydraulic fracturing process is monitored, it cannot be tested with larger-sized rocks; patent CN106285586 A discloses a simulation The device and method of the casing damage process, but it does not provide a method for simulating in-situ conditions; and when a simulated shear test is required, the prefabricated cracks must meet the loading direction along a uniform direction when making rock samples

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