Multifunctional Sustained Annulus Pressure Ground Diagnosis Method and Device

doi:10.11885/j.issn.1674-5086.2022.03.09.01

Abstract

Abstract: In order to break through foreign technology blockade, solve the problems of less functions of domestic technology and the problem of inconvenience in transportation due to large size and heavy mass of the existing devices, we put forward a kind of multi-functional sustained annulus pressure ground diagnosis method, design a set of modular and integration processing plan, and develop a portable device system. The system includes gas-liquid separation and solid phase filtration module, temperature pressure and flow monitoring module, gas phase parameter monitoring module, liquid phase parameter monitoring module and liquid level height monitoring module, which can form an integrated combination scheme with different functions, combined with wireless data transmission technology and supporting analysis software. It has diagnostic analysis functions, such as cause analysis of sustained annulus pressure, calculation of leakage point position, leakage degree assessment and risk degree judgment. The field test results show that the reason for the increase in annulus pressure in the case well is a certain defect in cement ring bonding, the leak point depth is about 3 120 m and a leak rate of 0.012 m³/min. The results measured by the system coincide with the actual situation, which verifies the rationality of the diagnosis method and the reliability of the device.

Key words: sustained annulus pressure, wireless transmission, ground diagnosis, leakage rate, degree of risk

CLC Number:

TE281

YANG Shunhui, HE Hanping, ZHANG Zhi, DOU Xuefeng, YIN Xilu. Multifunctional Sustained Annulus Pressure Ground Diagnosis Method and Device[J]. Journal of Southwest Petroleum University(Science & Technology Edition), 2023, 45(5): 131-139.

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URL: http://journal15.magtechjournal.com/Jwk_xnzk/EN/10.11885/j.issn.1674-5086.2022.03.09.01

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