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Leak-off mechanism and pressure prediction for shallow sediments in deepwater drilling
Tan, Qiang1; Deng, Jingen1; Sun, Jin1,2; Liu, Wei1; Yu, Baohua1; Tan, Qiang(China Univ Petr, State Key Lab Petr Resources & Prospecting, Beijing 102249, Peoples R China)
2018-02-01
Source PublicationJOURNAL OF OCEAN UNIVERSITY OF CHINA
Volume17Issue:1Pages:65-71
Contribution Rank第1完成单位 ; 第2完成单位
AbstractDeepwater sediments are prone to loss circulation in drilling due to a low overburden gradient. How to predict the magnitude of leak-off pressure more accurately is an important issue in the protection of drilling safety and the reduction of drilling cost in deep water. Starting from the mechanical properties of a shallow formation and based on the basic theory of rock-soil mechanics, the stress distribution around a borehole was analyzed. It was found that the rock or soil on a borehole is in the plastic yield state before the effective tensile stress is generated, and the effective tangential and vertical stresses increase as the drilling fluid density increases; thus, tensile failure will not occur on the borehole wall. Based on the results of stress calculation, two mechanisms and leak-off pressure prediction models for shallow sediments in deepwater drilling were put forward, and the calculated values of these models were compared with the measured value of shallow leak-off pressure in actual drilling. The results show that the MHPS (minimum horizontal principle stress) model and the FIF (fracturing in formation) model can predict the lower and upper limits of leak-off pressure. The PLC (permeable lost circulation) model can comprehensively analyze the factors influencing permeable leakage and provide a theoretical basis for leak-off prevention and plugging in deepwater drilling.
SubtypeArticle
KeywordDeepwater Drilling Shallow Sediments Leak-off Mechanism Leak-off Pressure
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1007/s11802-018-3493-y
URL查看原文
Indexed BySCI
Language英语
WOS KeywordWELLBORE ; MODEL
WOS SubjectOceanography
WOS IDWOS:000419533800008
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.idsse.ac.cn/handle/183446/5258
Collection深海科学研究部_深海地球物理与资源研究室
Corresponding AuthorTan, Qiang; Tan, Qiang(China Univ Petr, State Key Lab Petr Resources & Prospecting, Beijing 102249, Peoples R China)
Affiliation1.China Univ Petr, State Key Lab Petr Resources & Prospecting, Beijing 102249, Peoples R China
2.Chinese Acad Sci, Inst Deep Sea Sci & Engn, Key Lab Marine Georesources & Prospecting Hainan, Sanya 572000, Peoples R China
Recommended Citation
GB/T 7714
Tan, Qiang,Deng, Jingen,Sun, Jin,et al. Leak-off mechanism and pressure prediction for shallow sediments in deepwater drilling[J]. JOURNAL OF OCEAN UNIVERSITY OF CHINA,2018,17(1):65-71.
APA Tan, Qiang,Deng, Jingen,Sun, Jin,Liu, Wei,Yu, Baohua,&Tan, Qiang.(2018).Leak-off mechanism and pressure prediction for shallow sediments in deepwater drilling.JOURNAL OF OCEAN UNIVERSITY OF CHINA,17(1),65-71.
MLA Tan, Qiang,et al."Leak-off mechanism and pressure prediction for shallow sediments in deepwater drilling".JOURNAL OF OCEAN UNIVERSITY OF CHINA 17.1(2018):65-71.
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