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Real-time monitoring device for dynamic expansion of carbonate rock acidified wormhole and working method of real-time monitoring device

A carbonate rock, dynamic expansion technology, used in earth-moving drilling, wellbore/well components, etc., can solve the problem of inability to dynamically and dynamically monitor the acidification process, etc., to improve acid utilization, reduce pollution, and solve pore changes. quick effect

Pending Publication Date: 2019-09-27
CHINA UNIV OF PETROLEUM (EAST CHINA)
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Problems solved by technology

By performing non-destructive testing radiography on the test cores before and after acidification, the characteristic pictures of the cracks before and after acidification of the test cores were obtained, and by comparing the characteristic pictures, the morphological characteristics of acid-etched fractures formed under different acid liquid types and different flow velocities were obtained, but There is an inability to dynamically monitor the acidification process

Method used

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  • Real-time monitoring device for dynamic expansion of carbonate rock acidified wormhole and working method of real-time monitoring device
  • Real-time monitoring device for dynamic expansion of carbonate rock acidified wormhole and working method of real-time monitoring device
  • Real-time monitoring device for dynamic expansion of carbonate rock acidified wormhole and working method of real-time monitoring device

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Embodiment 1

[0035] A real-time monitoring device for the dynamic expansion of acidified wormholes in carbonate rocks, such as figure 1 As shown, it includes acid liquid injection system, acid rock reaction system, nuclear magnetic resonance test system, acid liquid recovery and processing system, data acquisition and experiment control system.

[0036]The acid liquid injection system includes a constant-pressure constant-speed advection pump 1 , an intermediate container 3 , a vacuum pump 25 , and an Erlenmeyer flask 26 . The displacement of the advection pump is 0.01-25mL / min, and the maximum pump pressure is 40MPa; the capacity of the intermediate container is 1L, and the pressure resistance is 50MPa; the maximum pump pressure of the vacuum pump is 0.1MPa.

[0037] The acid rock reaction system includes a core holder 9 , an annular pressure tracking pump 10 , a heating device 11 , and a circulation pump 12 . The core holder includes a shell (made of non-magnetic steel), left and right ...

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Abstract

The invention provides a real-time monitoring device for dynamic expansion of a carbonate rock acidified wormhole. The real-time monitoring device comprises an acid liquid injection system, an acid rock reaction system, a nuclear magnetic resonance testing system, an acid liquid recovery treatment system and a data collecting and experimental control system; the acid rock reaction system is used for simulating the formation temperature and pressure; the nuclear magnetic resonance testing system is used for core pore imaging; and the acid liquid recovery treatment system is used for recovering acid liquid and treating waste gas. Dynamic expansion of the carbonate rock acidified wormhole is monitored in real time through the device, the static imaging precision reaches 0.1-100 [mu]m, the shortest dynamic imaging time is 13 s, the requirements of pore accurate description before acidification and wormhole quick imaging during acidification can be met simultaneously, and the problem that as for a reaction fluid displacement experiment, pore change is quick, and consequently imaging is difficult is solved.

Description

technical field [0001] The invention relates to a real-time monitoring device and a working method for the dynamic expansion of acidified wormholes in carbonate rocks, and belongs to the technical field of oil and gas reservoir production increase measures. Background technique [0002] Carbonate reservoirs are rich in oil and gas resources, and their reserves account for about half of the global total. In order to improve the permeability of the formation near the wellbore, acidizing treatment is often carried out in the oil field. In order to determine the optimal acidification parameters, it is usually necessary to carry out simulation experiments in the laboratory. Acidification simulation mainly includes numerical simulation and physical simulation. Numerical simulation is to simulate the acidification process of carbonate rock by means of numerical calculation with the help of electronic computer, which has the advantages of intuitive image and strong repeatability. ...

Claims

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Application Information

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IPC IPC(8): E21B49/00
CPCE21B49/00
Inventor 齐宁陈国彬李振亮任兴华
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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