IRS/2025/6495/PON1

Notification details

Status	Completed
First observed date	14 July 2025
First observed time	10:00
Incident type(s)	Chemical release
Organisations involved	PERENCO UK LIMITED
Installation	Hoton Platform
Installation type	Production installation (including any connected infrastructure)
Field	WEST SOLE
Latitude	53° 48' 12.717'' N
Longitude	1° 12' 27.977'' E

Chemical 1

Chemical product released	CAUSTIC SODA
Total quantity of chemical released	0.004 kg

Chemical 2

Chemical product released	DEFOAM PLUS NS
Total quantity of chemical released	0.007 kg

Chemical 3

Chemical product released	DRILLING STARCH
Total quantity of chemical released	0.057 kg

Chemical 4

Chemical product released	DUO-VIS
Total quantity of chemical released	0.036 kg

Chemical 5

Chemical product released	GLYDRIL MC
Total quantity of chemical released	0.405 kg

Chemical 6

Chemical product released	IDCAP
Total quantity of chemical released	0.086 kg

Chemical 7

Chemical product released	M-I WATE (All Grades)
Total quantity of chemical released	1.498 kg

Chemical 8

Chemical product released	POLYPAC - All Grades
Total quantity of chemical released	0.043 kg

Chemical 9

Chemical product released	POTASSIUM CHLORIDE
Total quantity of chemical released	7.772 kg

Chemical 10

Chemical product released	SAFE-CIDE
Total quantity of chemical released	0.004 kg

Chemical 11

Chemical product released	SODA ASH
Total quantity of chemical released	0.004 kg

Chemical 12

Chemical product released	Soltex® Additive
Total quantity of chemical released	0.086 kg

Formal investigation

Formal investigation ever opened	No

Close off details

Release ever ongoing	No

Source details

Source	Annulus - Thermal expansion