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Abstract

Summary

Tanggulangin oil and gas field is located in Northeast Java Basin, is one of the important operation area in East Java, was firstly explored through drilling operation in 2001, and has already produced significant oil and gas for PT.Lapindo Brantas. Production optimization through additional drilling campaign and more detailed geomechanical analysis is needed to increase the production and avoid undesirable cost. Wellbore stability became the most important aspect to be analysed as most of the wells in Tanggulangin encountered significant wellbore problems. Some of the problems were gas kick, stuck pipe, mud losses, sloughing shale, ballooning effect, and mud flowing, are very common in this overpressured area. We find several factors that influence wellbore stability in Tanggulangin field, they are: shallow gas potential, swelling clay (shown by smectite-illite content in the rock sample), accuracy of LOT measurement, mud management and soft sediment which shown by low rock strength value (5–10 MPa). Accurate of pore pressure prediction and LOT measurement will reduce wellbore stability risk.TGA-5 was drilled without any significant problem, ensure us that the drilling campaign in Tanggulangin can be improved effectively.

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/content/papers/10.3997/2214-4609.201602359
2016-10-24
2024-04-20

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http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.201602359
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Wellbore Stability in Soft Sediment and Overpressured Environment, Study Case in Tanggulangin, Northeast Java Basin
Conference Proceedings 2016, 1 (2016); https://doi.org/10.3997/2214-4609.201602359
/content/papers/10.3997/2214-4609.201602359
/content/papers/10.3997/2214-4609.201602359
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