Drilling design and construction of Well Mengsudi-1 in Yingen-Ejinaqi Basin

QIAN Feng; ZHAO Yuangang; HUANG Xiaolin; SHI Shaoyun and LUO Xianliang; ${author.authorNameEn}

doi:10.12143/j.ztgc.2022.05.019

2022 Vol. 49, No. 5

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Article navigation > DRILLING ENGINEERING > 2022 > 49(5): 136-144

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QIAN Feng, ZHAO Yuangang, HUANG Xiaolin, SHI Shaoyun and LUO Xianliang, . 2022. Drilling design and construction of Well Mengsudi-1 in Yingen-Ejinaqi Basin. DRILLING ENGINEERING, 49(5): 136-144. doi: 10.12143/j.ztgc.2022.05.019

Citation:

QIAN Feng, ZHAO Yuangang, HUANG Xiaolin, SHI Shaoyun and LUO Xianliang, . 2022. Drilling design and construction of Well Mengsudi-1 in Yingen-Ejinaqi Basin. DRILLING ENGINEERING, 49(5): 136-144. doi: 10.12143/j.ztgc.2022.05.019

Drilling design and construction of Well Mengsudi-1 in Yingen-Ejinaqi Basin

Institute of Exploration Technology， CAGS， Chengdu Sichuan 611734, China

Received Date: 03 September 2021

Revised Date: 14 May 2022

Abstract

Abstract

The Well Mengsudi-1 is a large-diameter key oil and gas geological survey well deployed by China Geological Survey in the Aaitegle Sag， Yingen-Ejinaqi Basin. In view of the geological conditions and technical difficulties in drilling in this block， optimization has been made for the drilling works of the Well Mengsudi-1 from the aspects of the wellbore structure， the drilling assembly， bit type selection and drilling technology. A drilling technical plan with the combination of “simplified wellbore structure+unconventional drilling assembly+conventional bit selection+strong inhibitory mud” was adopted and eliminated a series of problems such as high hardness， poor drillability， easy well deviation and wellbore instability in fractures in Mesozoic Bayingebi Formation and Upper Permian， leading to the successful completion of the Well Mengsudi-1. Drilling of the well was completed at 2763.66m with the diameter of 215.9mm， and the average drilling rate of 3.51m/h. The well successfully revealed the characteristics of Mesozoic and Carboniferous Permian rock assemblages and oil and gas potential， meeting various objectives and tasks with high quality， high efficiency and zero accidents.
- oil and gas geological survey /
- drilling design /
- drilling tool assembly /
- bit selection /
- strong inhibitory mud /
- Well Mengsudi-1 /
- Yingen-Ejinaqi Basin

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References

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