Coring drilling technology of coral-reef Quaternary overburden in South China Sea

Song Jiwei; Jiang Guosheng; Li Yong; Ban Jinpeng; Hao Haiyang

doi:10.19509/j.cnki.dzkq.2020.0323

Volume 39 Issue 3

May 2020

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Article Navigation > Bulletin of Geological Science and Technology > 2020 > 39(3): 211-215

Song Jiwei, Jiang Guosheng, Li Yong, Ban Jinpeng, Hao Haiyang. Coring drilling technology of coral-reef Quaternary overburden in South China Sea[J]. Bulletin of Geological Science and Technology, 2020, 39(3): 211-215. doi: 10.19509/j.cnki.dzkq.2020.0323

Citation:

Song Jiwei, Jiang Guosheng, Li Yong, Ban Jinpeng, Hao Haiyang. Coring drilling technology of coral-reef Quaternary overburden in South China Sea[J]. Bulletin of Geological Science and Technology, 2020, 39(3): 211-215. doi: 10.19509/j.cnki.dzkq.2020.0323

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Coring drilling technology of coral-reef Quaternary overburden in South China Sea

doi: 10.19509/j.cnki.dzkq.2020.0323

Received Date: 22 Mar 2019

Abstract

Abstract

The coral-reefs in the South China Sea own huge resource potential and scientific research value.Coral-reef's Quaternary overburden is composed of the loose accumulation of coral skeleton and coral sand.The poor cementation coral-reef covering layer makes coring and well completion much difficult.Based on the construction practice of hundreds of drilling holes in South China Sea Islands, the technology of "casing continuous follow-up dry coring drilling technnology" is summarized. The key point of this technology is the four-step cycle operation, which can be called "four-step method".It can ensure that core recovery rate of the coral-reef Quaternary overburden can reach above 95% with basically guaranteeing core original state.Also it can safely drill into the formation without using mud protection wellbore in the Quaternary overburden of coral-reef and achieve the goal of avoiding blockage of formation water passage and meeting the requirements of pumping tests.The present research results have significant reference for coral reef drilling.
- coral-reef,
- quaternary overburden,
- dry coring drilling technology,
- casing continuous fellow-up,
- four-step method

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References

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Coring drilling technology of coral-reef Quaternary overburden in South China Sea

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Coring drilling technology of coral-reef Quaternary overburden in South China Sea

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