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Low-permeability reservoir nitrogen composition huff and puff physical simulation experiment device and method

A technology of physical simulation and experimental device, which is applied in earth-moving drilling, wellbore/well components, production fluid, etc. It can solve the problems of small volume, difficult to achieve process simulation, and inability to inject solution, and achieve the realization of injection and production parameters. Effect

Active Publication Date: 2019-03-29
CHINA PETROLEUM & CHEM CORP +1
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  • Application Information

AI Technical Summary

Problems solved by technology

During the process of injecting water and surfactant solution into the low-permeability core used in the experiment, due to its small volume, it is impossible to simulate the expansion of the formation, so the solution cannot be injected, and it is difficult to realize a comprehensive process simulation

Method used

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  • Low-permeability reservoir nitrogen composition huff and puff physical simulation experiment device and method
  • Low-permeability reservoir nitrogen composition huff and puff physical simulation experiment device and method
  • Low-permeability reservoir nitrogen composition huff and puff physical simulation experiment device and method

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Embodiment Construction

[0035] In order to make the above and other objects, features and advantages of the present invention more comprehensible, the preferred embodiments are listed below and shown in the accompanying drawings in detail as follows.

[0036] Such as figure 1 as shown, figure 1 It is a structural diagram of the low-permeability reservoir nitrogen compound huff and puff physical simulation experiment device of the present invention. The low-permeability reservoir nitrogen compound huff and puff physical simulation experiment device includes a core saturation system, an injection system, a core clamping system, a buffer system, and a recovery metering system.

[0037] Such as figure 2 As shown, the core saturation system saturates the core with formation water and crude oil. It includes formation water intermediate container 1, crude oil intermediate container 2, preheater 13 and first advection pump 4. The formation water intermediate container 1 stores formation water in the tar...

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Abstract

The invention provides a low-permeability reservoir nitrogen composition huff and puff physical simulation experiment device and method. The device comprises a core saturation system, an injection system, a core clamping system and a recovery metering system. The core saturation system is connected to the core clamping system, formation water saturation and crude oil saturation are performed on acore, the injection system is connected to the core clamping system, a certain amount of gas or water or a surface active agent solution is injected into the core, the core clamping system is arrangedinside a constant temperature control cabinet, the balance of the core is maintained, certain confining pressure is applied to the periphery of the core so as to ensure that fluid can only flow inside the core, the recovery metering system is connected to the core clamping system, and gas production and oil production changes in the recovery process are metered. According to the low-permeabilityreservoir nitrogen composition huff and puff physical simulation experiment device and method, the problem that a solution cannot be injected in the injection process is solved, pressure and temperature changes in the simulation process can be monitored in real time, and injection-production parameter optimization can be achieved.

Description

technical field [0001] The invention relates to the technical field of oil field development, in particular to a physical simulation experiment device and method for nitrogen composite huff and puff in low permeability reservoirs. Background technique [0002] At present, low-permeability reservoirs have become an important position for my country's proven reserves and production capacity construction. They are developed by fracturing and water injection. Due to the influence of poor reservoir physical properties and low degree of water flooding control, the problems of rapid energy decline and insufficient energy increase are prominent. At present, The nominal recovery factor is low. Many studies have shown that nitrogen injection is an effective method to improve the development effect of low-permeability reservoirs. It can effectively replenish formation energy and solve problems such as difficult water injection and rapid water cut rise in low-permeability reservoirs. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/16E21B43/22
CPCE21B43/16E21B43/166
Inventor 张丁涌冯庆伟万惠平张江鹿腾张伟李健李兆敏冯虎衣军徐伟凝许新华
Owner CHINA PETROLEUM & CHEM CORP
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