4 replies to this topic

[VikingUK]

I have a sour gas well, H2S >600ppm.
I'm starting to get black deposits in the in line separator which is causing blockages of transmitters.
The well is only 6 month old and I'm thinking these deposits could be Iron Sulphide.
Anyone have any ideas ? Am I right or what else could they be ?

[mbeychok]

VikingUK:

It would be a simple job to have a sample analyzed in a laboratory. If it is iron sulfide, be aware that iron sulfide is extremely pyrophoric and, in the event of removal of the iron sulfide during a shutdown, the sulfide must be kept wet to prevent spontaneous combustion.

[Qalander (Chem)]

VikingUK:

It would be a simple job to have a sample analyzed in a laboratory. If it is iron sulfide, be aware that iron sulfide is extremely pyrophoric and, in the event of removal of the iron sulfide during a shutdown, the sulfide must be kept wet to prevent spontaneous combustion.

Dear VikingUK,Hello/Good Afternoon, may I add a very minor thing to what has been accurately advised by our "mbeychok" .Keeping wet with water.

[VikingUK]

I have had an analyis taken and it is NOT Iron based. I have checked the completion data for the well and no drilling fluids were added that could account for this substance. It appears to be more soluble in the condensate phase and insoluble in the produced water phase. I have also added acid to it to see if this dissolves it or breaks it down and it has no effect.

[Qalander (Chem)]

I have had an analyis taken and it is NOT Iron based. I have checked the completion data for the well and no drilling fluids were added that could account for this substance. It appears to be more soluble in the condensate phase and insoluble in the produced water phase. I have also added acid to it to see if this dissolves it or breaks it down and it has no effect.

Dear I wonder about its carbon contents and sulfur contents as these are important to know its chemistry and possible hazards associated if any at all!.
However since as envisaged by me it might have a fine powdery appearance(occasionally) encountered in the Gas pipelines, then 'dust explosion related' risks should not be ignored.