Key technologies for improving deep shale gas horizontal drilling ROP in Luzhou

LI Kui

doi:10.12143/j.ztgc.2022.05.014

2022 Vol. 49, No. 5

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LI Kui. 2022. Key technologies for improving deep shale gas horizontal drilling ROP in Luzhou. DRILLING ENGINEERING, 49(5): 100-105. doi: 10.12143/j.ztgc.2022.05.014

Citation:

LI Kui. 2022. Key technologies for improving deep shale gas horizontal drilling ROP in Luzhou. DRILLING ENGINEERING, 49(5): 100-105. doi: 10.12143/j.ztgc.2022.05.014

Key technologies for improving deep shale gas horizontal drilling ROP in Luzhou

LI Kui¹

No.1 Drilling Company, Sinopec Jianghan Petroleum Engineering Company Ltd., Qianjiang Hubei 433100， China

Received Date: 11 May 2022

Revised Date: 01 August 2022

Abstract

Abstract

Deep shale gas reservoir in Luzhou Block is featured of high formation temperature and pressure， leading to a high failure rate of 50% for the rotary-steering drilling tools and long average drilling time up to 50 days. Also， due to the wellbore trajectory design of “low kick-off point+high buildup rate” and the frequent adjustment of the long horizontal section trajectory， the frictional resistance during tripping of drilling strings and placement of casing was large. To address the above problems， several key technologies have been developed， including low-density-mud-based managed pressure drilling， the surface cooling system， and rotary casing placement. Field application showed that the density of drilling fluid was reduced from 2.20g/cm³ to 1.82g/cm³， the average ROP of the forth well section was 11.44m/h with an increase of 43%， the average drilling period was 27.1 days with a reduction of 51%， and the drilling speed and efficiency were significantly improved. The key technologies have good promotion and reference significance for improving the speed and efficiency of deep shale gas drilling projects in Luzhou.
- deep shale gas /
- MPD /
- rotary-steering drilling /
- surface cooling system /
- rotary casing running /
- Luzhou Block /
- Sichuan Basin

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References

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