Large-Section and Multi-Cluster Fracturing Technology for Horizontal Wells in the Jimsar Shale Oil Reservoir Research and application of large-segment multi-cluster fracturing technology in jimsar shale oil horizontal well

WANG Lei; SHENG Zhimin; ZHAO Zhongxiang; SONG Daohai; WANG Lifeng; WANG Gang

doi:10.11911/syztjs.2021091

Volume 49 Issue 4

Jul. 2021

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Petroleum Drilling Techniques > 2021 > 49(4): 106-111. > DOI: 10.11911/syztjs.2021091

WANG Lei, SHENG Zhimin, ZHAO Zhongxiang, SONG Daohai, WANG Lifeng, WANG Gang. Large-Section and Multi-Cluster Fracturing Technology for Horizontal Wells in the Jimsar Shale Oil Reservoir——Research and application of large-segment multi-cluster fracturing technology in jimsar shale oil horizontal well[J]. Petroleum Drilling Techniques, 2021, 49(4): 106-111. DOI: 10.11911/syztjs.2021091

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Large-Section and Multi-Cluster Fracturing Technology for Horizontal Wells in the Jimsar Shale Oil Reservoir——Research and application of large-segment multi-cluster fracturing technology in jimsar shale oil horizontal well

WANG Lei^{1, 2,},
SHENG Zhimin^{1, 2},
ZHAO Zhongxiang³,
SONG Daohai^{1, 2},
WANG Lifeng^{1, 2},
WANG Gang⁴

1.
Downhole Service Company, CNPC XiBu Drilling Engineering Company Limited, Karamay, Xinjiang, 834000, China
2.
Shale Oil Reservoir Stimulation Sub-Laboratory, Key Laboratory of Reservoirs Stimulation, CNPC, Karamay, Xinjiang, 834000, China
3.
Engineering Technology Department, PetroChina Xinjiang Oilfield Company, Karamay, Xinjiang, 834000, China
4.
Jiqing Oilfield Operation Area, PetroChina Xinjiang Oilfield Company, Karamay, Xinjiang, 834000, China

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Received Date: April 14, 2021
Revised Date: July 04, 2021
Available Online: July 27, 2021

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Abstract

Abstract

Reservoirs in the Lucaogou Formation of the Jimsar Sag have poor physical properties, strong heterogeneity, and poor crude oil fluidity. Accordingly, it is difficult to accurately stimulate favorable reservoirs with horizontal wells, and staged fracturing has only a limited positive effect on production. Contradiction is highlighted by the fact that a high investment yields only a low level of output. In order to solve these problems, non-uniform limited-entry perforation was conducted to improve the distribution of fracturing fluid in the fracture clusters in the sections. Temporary plugging at the fracture entrance and in the fracture were adopted to increase the net pressure, so as to generate complex fracture networks. In addition, fracturing parameters were optimized to facilitate the balanced initiation of multiple clusters of fractures in the sections. Finally, the large-section and multi-cluster fracturing technology suitable for the horizontal wells in the Jimsar shale oil reservoir was developed. Field applications showed that the technology can enhance the stimulation and production of shale oil reservoirs, and provide strong support for the economic and effective development of the shale oil reservoir in the Jimsar Sag.
- shale oil,
- large-section and multi-cluster,
- temporary plugging and diverting,
- limited-entry perforation,
- balanced initiation

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References

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Large-Section and Multi-Cluster Fracturing Technology for Horizontal Wells in the Jimsar Shale Oil Reservoir——Research and application of large-segment multi-cluster fracturing technology in jimsar shale oil horizontal well

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Large-Section and Multi-Cluster Fracturing Technology for Horizontal Wells in the Jimsar Shale Oil Reservoir——Research and application of large-segment multi-cluster fracturing technology in jimsar shale oil horizontal well

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