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Title: Formation fracturing kills Indonesian blowout

Abstract

Dynamic killing methods without fracturing could not be applied in killing PT-29 blowout, due to the reservoir rock properties (shaley sand formation). A special fracturing and acidizing technique was required in order to allow the calculated kill rate of 40 bbl/ min. A low injection rate of 0.5 bbl/min with high injection pressure of 1,250 psi occurred due to a degree of formation damage and the mud cake covering the sand face. The calculated formation fracture pressure of 1,393 psi was a reliable value compared to actual fracture pressure of 1,400 psi. The designed killing rate of 40 bbl/ min could not reach the blowout well due to some leak-off of the injected fluid in unexpected directions of the induced fractures. Clearing PT-29 of all debris was very important for immediate well capping. The capping operation was done after the fire was extinguished; although the well was still flowing gas and water, no hazard of explosion was detected. The exact subsurface position of the blowout well of PT-29 was uncertain due to the lack of directional survey data. This problem reduced the effectiveness of the killing operation. A reliable water supply is important to the success of the killing job.more » Once the fracture had been induced, kill fluid had to be pumped continuously; any interruption might cause the fracture to heal. Deviation and directional survey data on every vertical or directional well are absolutely important for accurate relief well drilling purposes in case it is required.« less

Authors:
; ;
Publication Date:
Research Org.:
Pertamina, Jakarta
OSTI Identifier:
6329012
Resource Type:
Journal Article
Journal Name:
Oil Gas J.; (United States)
Additional Journal Information:
Journal Volume: 80:46
Country of Publication:
United States
Language:
English
Subject:
02 PETROLEUM; 03 NATURAL GAS; BLOWOUTS; CONTROL; OIL WELLS; WELL DRILLING; ACIDIZATION; FLUID INJECTION; FRACTURING; INDONESIA; RESERVOIR ROCK; ROCK MECHANICS; SAND; WATER SUPPLY; ACCIDENTS; ASIA; COMMINUTION; DEVELOPING COUNTRIES; DRILLING; ISLANDS; MECHANICS; WELLS; 020300* - Petroleum- Drilling & Production; 030300 - Natural Gas- Drilling, Production, & Processing

Citation Formats

Wizyodiazjo, S, Salech, M, and Sumanta, K. Formation fracturing kills Indonesian blowout. United States: N. p., 1982. Web.
Wizyodiazjo, S, Salech, M, & Sumanta, K. Formation fracturing kills Indonesian blowout. United States.
Wizyodiazjo, S, Salech, M, and Sumanta, K. Mon . "Formation fracturing kills Indonesian blowout". United States.
@article{osti_6329012,
title = {Formation fracturing kills Indonesian blowout},
author = {Wizyodiazjo, S and Salech, M and Sumanta, K},
abstractNote = {Dynamic killing methods without fracturing could not be applied in killing PT-29 blowout, due to the reservoir rock properties (shaley sand formation). A special fracturing and acidizing technique was required in order to allow the calculated kill rate of 40 bbl/ min. A low injection rate of 0.5 bbl/min with high injection pressure of 1,250 psi occurred due to a degree of formation damage and the mud cake covering the sand face. The calculated formation fracture pressure of 1,393 psi was a reliable value compared to actual fracture pressure of 1,400 psi. The designed killing rate of 40 bbl/ min could not reach the blowout well due to some leak-off of the injected fluid in unexpected directions of the induced fractures. Clearing PT-29 of all debris was very important for immediate well capping. The capping operation was done after the fire was extinguished; although the well was still flowing gas and water, no hazard of explosion was detected. The exact subsurface position of the blowout well of PT-29 was uncertain due to the lack of directional survey data. This problem reduced the effectiveness of the killing operation. A reliable water supply is important to the success of the killing job. Once the fracture had been induced, kill fluid had to be pumped continuously; any interruption might cause the fracture to heal. Deviation and directional survey data on every vertical or directional well are absolutely important for accurate relief well drilling purposes in case it is required.},
doi = {},
journal = {Oil Gas J.; (United States)},
number = ,
volume = 80:46,
place = {United States},
year = {1982},
month = {11}
}