Research and Application of the Water Isolation Technology for Casing Damage in Jiyuan Oilfield

doi:10.11885/j.issn.1674-5086.2019.11.22.02

Abstract

Abstract: With the development of the Jiyuan Oilfield for many years, the comprehensive water of the oilfield has gradually increased, the wellbore corrosion has become serious, and the number of the casing damage well has increased year by year. Because of the well casing damaging, the injection-extraction well pattern is out of control、the use of water drive degree is reducing, and the remaining oil is not producted effectively. The wells is not mined normally and oil fields is also not mined stablely, which causes huge economic losses in the Jiyuan oilfield. Therefore, how to govern the wells effectively, has become an important task in Jiyuan Oilfield. In this paper, on the one hand, the principle analysis and the effect comparison for field application of Y211, Y341 and bridge plug are firstly obtained, and aslo the defect of field application is got. On the other hand, the LEP long-term isolation packer and the soft metal casing subsidy tool are carried out for solving the problem of the conventional isolation tools. Through the advantages and disadvantages and practical range of different types of mechanical isolation tools are summarized, the effective measures for treating casing loss wells with mechanical isolation tools under different working conditions are obtained. It provides a direction for governing casing damage wells in Jiyuan Oilfield.

Key words: Jiyuan Oilfield, casing damage well, packer, mechanical isolation tool, down and seal the packer

CLC Number:

TE358

GOU Lipeng, ZHANG Jinke, YANG Jinfeng, WEI Jiangwei, ZHANG Qian. Research and Application of the Water Isolation Technology for Casing Damage in Jiyuan Oilfield[J]. 西南石油大学学报(自然科学版), 2020, 42(3): 107-114.

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