Petroleum Reservoir Evaluation and Development >

2021 , Vol. 11 >Issue 2: 256 - 260

DOI: https://doi.org/10.13809/j.cnki.cn32-1825/te.2021.02.017

Comprehensive Research

Plugging technology applied for total loss in shale gas wells of Lower Yangtze Region: Taking Well-WY-1HF as an example

  • Dayong LI ,
  • Chao XIAO ,
  • Shengjian WANG ,
  • Xiaoxiang ZHAO ,
  • Disi ZHU ,
  • Haoya LIU
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  • 1. Oil and Gas Survey Center, China Geological Survey, Beijing 100083, China
    2. Sinopec Research Institute of Petroleum Engineering, Beijing 100101, China

Received date: 2020-09-30

  Online published: 2021-04-30

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Abstract

At present, the leakage of shale gas drilling is quite common in China, and there are few plugging methods suitable for oil-based drilling fluid. The total loss of drilling fluid is still a difficult problem for technicians in the industry. Taking the field operation of Well-WY-1HF as an example, during the drilling of its horizontal well interval by using oil-based drilling fluid, the conventional plugging technology of bridge plug and cement plugging technology of oil well can not work efficiently. Based on the analysis of the characteristics of the loss zones, the effect of different plugging material of oil-base drilling fluid performance have been studied to determine the formula for successful plugging, that is high density （1.89 g/cm3） cement solidified plugging combined with low density （1.17 g/cm3） inorganic gel curing plugging, cooperating with the use of bridge plug with high concentration and large particle. It ensures the subsequent drifting, well logging, the casing and cementing operation smoothly. The successful implementation of this method provides certain reference for the application of shale gas plugging technology in the same area.

Key words： plugging by low density gel; cement plugging; total loss; bridge plugging; horizontal well interval for shale gas; Lower Yangtze Region

Cite this article

Dayong LI , Chao XIAO , Shengjian WANG , Xiaoxiang ZHAO , Disi ZHU , Haoya LIU . Plugging technology applied for total loss in shale gas wells of Lower Yangtze Region: Taking Well-WY-1HF as an example[J]. Petroleum Reservoir Evaluation and Development, 2021 , 11(2) : 256 -260 . DOI: 10.13809/j.cnki.cn32-1825/te.2021.02.017

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