Well Integrity Technical Section

Dear Friends, Greetings.

We're reviewing our business model and have a question related to well handover.

 Could you please confirm as per your Company practice,

Which team is responsible for well preparation for rig entry, particularly killing ad securing part?

Is it production / operation unit, or Drilling Team, or dedicated / standalone "Well Services / Well Operation" team?
feel free to message me directly to ayugay@adnoc.ae

Thanks

Rgds

Drilling team is responsible for rig entry.

Drilling or Workover Team for the killing part.
There will be additional prerequisites when handing over the well to the Drilling Team but in all my years in the industry, I'm yet to come across a practice where it is done differently, offshore or onshore.

------------------------------
Sudeep Roy
CEng MEI Chartered Energy Engineer

Disclaimer: This post reflects a purely personal opinion and not that of the organization with which I am affiliated.
------------------------------

Original Message:
Sent: 12-27-2022 07:58 AM
From: Muhammad Samad
Subject: Well Killing and Securing Prior to Rig Entry

Drilling team is responsible for rig entry.

Hi Andrey, 

In my company, normally it will be handled by Well Services team thru its pumping/slickline unit and collaborate with production operation team. We have internal guideline which required to bleed casing pressure to below 100psi and MOC shall be applied (optional) for active flowing well without killing the well based on risk asessment. However, if under such circumstances e.g. sustained casing pressure and unable to bleed down to below 100psi, well killing will be commenced.

Once all wells at platform achieved below 100psi. Then we will handover to drilling team. For me, it is more to collaborative effort from everyone, and clear demarkation must be established among the stakeholders prior to job execution.

Hope it helps and have a nice day ahead.

regards,
Darren
Well Intervention Engineer


Original Message:
Sent: 12-27-2022 07:58 AM
From: Muhammad Samad
Subject: Well Killing and Securing Prior to Rig Entry

Drilling team is responsible for rig entry.

Usually production team secures the well and handover to the drilling team and drilling team kiss the well is there is no integrity  issue in the well which requires immediately killing operations prior to rig move or there is long wait time for rig to be available for work over. 

Hello,

Within a major independent O&G company I worked for, Well killing prior well intervention & rig move was handled by the drilling & completion department hosting a well intervention entity (pumping and slickline).

The production department, to make it short, was upfront in charge of bleeding off and isolating flow lines downstream the Xmas Tree, as well as isolating certain well monitoring devices, corrosion mitigation systems, WH earthing. Also installing where necessary a well-test separator and associated flaring (H2S wells).
A SIMOPS document was edited upfront detailing responsibilities of each stakeholder.
Season's greetings

Envoy de mon iPhoneRgis STUDER
Cell: +33 6 26 27 19 02 <tel:+33%206%2026%2027%2019%2002>
Mail: rgs.studer@gmail.com

Andrey,

Good subject to discuss. 
In my opinion, several factors has to be considered in establishing that process: 
- Organizational structure (current and potentially planned)
- Well Integrity Accountability at different stages: I have seen cases where Drilling team was assigned responsible and have seen when dedicated Well Intervention team was leading that part 
- Contracts availability and ownership 
- Budget ownership 

Based on your selected process, you may want to run a business consequences assessment and see which model suits more in your case. 

Regards,
Tural

Andrey,

I see that your post being spread between the different technical groups now.

While I already answered in Drilling section, where @Dan Gibson had brought additional insights to which I, personally, fully concur, there are, perhaps, a few words to add for his statements support.

As nowadays the global industry deals mainly with mature fields at one or another state of depletion, the time factor between killing the well and commencement of the workover becomes more critical than in abnormally pressurized reservoirs. As Dan truly notices, a few days too early well killing will result in complete loss of overbalance and possible partial displacement of the kill fluid by the gas, especially in higher GLR wells.
The way around would be to have mechanical barriers on both casing and annulus envelopes, which should be set after the kill, but also allow support for the fluid column to prevent its loss into reservoir.
However, the higher depletion would be, the higher the risks that increased overbalance above the plug may complicate its retrieval.

As @Regis Studer had shared earlier, the organizational aspects he described seem to me being the most common last decade, especially in major companies that have broad support structures.

However, frivolously referring again to post of Mr. Gibson, the approach in mature fields for the well control may (and should) be different from what we are learning in IWCF and IADC Well Control classes. Nevertheless, the importance of such differences is not recognized equally by all and every company and legislators.

I have developed specific course that addresses the methods of well control being complimentary to 'standard" well control practices, and - apart of having in published in 2016 on Petrolessons platform, also teach this class internally with my current and past companies. Should you be interested in more details, send me PM, Andrey.

Cheers, Merry Christmas and Happy Upcoming New Year! ​​

------------------------------
Sergey Chernenkov
I love Completion, Workover, Well Interventions and Integrity Engineering and Operations
------------------------------

This is an excellent topic that also merits re-posting to the Production & Completions Communities, since a lot of Well Intervention, Well Integrity Management and P&A work is carried out with Coiled Tubing, Service Rigs and Snubbing Units under the supervision of the Production Manager.

If the zone is only being temporarily killed and/or will be returned to production and the job cannot be performed under near balance conditions, the selection and removal of the loss circulation control materials and well servicing fluids is fundamentally an issue that merits input from the Production Engineers and Chemists/Flow Assurance Specialists, as well as the Well Engineers and Fluids Specialists and the Reservoir Management Team.

A multi-functional team needs to address the options (Proj. Mgt. Planning Phase 2) as well as the technical, operational and cost management and life of completion NPV risks.

I suspect the answer to the original question will vary between onshore; offshore; deep-water, HPHT or highly depleted reservoirs and the type of operation to be conducted by the rid or CTU unit. A horizontal sidetrack or deepening operation will be very different from the remediation of a gravel pack or leaky cement bond.

But, in my experience, the initial well kill was generally conducted by production and the verified by those managing the rig re-entry.

Thanks for a very interesting question that merits multi-functional discussion.
Regards
Bob


------------------------------
Bob Pearson
Technical Director,
Glynn Resources Ltd.
Calgary, Alberta, Canada
------------------------------

Original Message:
Sent: 12-28-2022 04:39 AM
From: Sergey Chernenkov
Subject: Well Killing and Securing Prior to Rig Entry

Andrey,

I see that your post being spread between the different technical groups now.

While I already answered in Drilling section, where @Dan Gibson had brought additional insights to which I, personally, fully concur, there are, perhaps, a few words to add for his statements support.

As nowadays the global industry deals mainly with mature fields at one or another state of depletion, the time factor between killing the well and commencement of the workover becomes more critical than in abnormally pressurized reservoirs. As Dan truly notices, a few days too early well killing will result in complete loss of overbalance and possible partial displacement of the kill fluid by the gas, especially in higher GLR wells.
The way around would be to have mechanical barriers on both casing and annulus envelopes, which should be set after the kill, but also allow support for the fluid column to prevent its loss into reservoir.
However, the higher depletion would be, the higher the risks that increased overbalance above the plug may complicate its retrieval.

As @Regis Studer had shared earlier, the organizational aspects he described seem to me being the most common last decade, especially in major companies that have broad support structures.

However, frivolously referring again to post of Mr. Gibson, the approach in mature fields for the well control may (and should) be different from what we are learning in IWCF and IADC Well Control classes. Nevertheless, the importance of such differences is not recognized equally by all and every company and legislators.

I have developed specific course that addresses the methods of well control being complimentary to 'standard" well control practices, and - apart of having in published in 2016 on Petrolessons platform, also teach this class internally with my current and past companies. Should you be interested in more details, send me PM, Andrey.

Cheers, Merry Christmas and Happy Upcoming New Year! ​​

------------------------------
Sergey Chernenkov
I love Completion, Workover, Well Interventions and Integrity Engineering and Operations
------------------------------

Dear colleagues, thanks a lot for all your feedback posted here and receive directly. 
rgds
Andrey

------------------------------
rgds
Andrey
------------------------------

Original Message:
Sent: 01-02-2023 01:05 PM
From: Robert Pearson
Subject: Well Killing and Securing Prior to Rig Entry

This is an excellent topic that also merits re-posting to the Production & Completions Communities, since a lot of Well Intervention, Well Integrity Management and P&A work is carried out with Coiled Tubing, Service Rigs and Snubbing Units under the supervision of the Production Manager.

If the zone is only being temporarily killed and/or will be returned to production and the job cannot be performed under near balance conditions, the selection and removal of the loss circulation control materials and well servicing fluids is fundamentally an issue that merits input from the Production Engineers and Chemists/Flow Assurance Specialists, as well as the Well Engineers and Fluids Specialists and the Reservoir Management Team.

A multi-functional team needs to address the options (Proj. Mgt. Planning Phase 2) as well as the technical, operational and cost management and life of completion NPV risks.

I suspect the answer to the original question will vary between onshore; offshore; deep-water, HPHT or highly depleted reservoirs and the type of operation to be conducted by the rid or CTU unit. A horizontal sidetrack or deepening operation will be very different from the remediation of a gravel pack or leaky cement bond.

But, in my experience, the initial well kill was generally conducted by production and the verified by those managing the rig re-entry.

Thanks for a very interesting question that merits multi-functional discussion.
Regards
Bob


------------------------------
Bob Pearson
Technical Director,
Glynn Resources Ltd.
Calgary, Alberta, Canada
------------------------------


Original Message:
Sent: 12-28-2022 04:39 AM
From: Sergey Chernenkov
Subject: Well Killing and Securing Prior to Rig Entry

Andrey,

I see that your post being spread between the different technical groups now.

While I already answered in Drilling section, where @Dan Gibson had brought additional insights to which I, personally, fully concur, there are, perhaps, a few words to add for his statements support.

As nowadays the global industry deals mainly with mature fields at one or another state of depletion, the time factor between killing the well and commencement of the workover becomes more critical than in abnormally pressurized reservoirs. As Dan truly notices, a few days too early well killing will result in complete loss of overbalance and possible partial displacement of the kill fluid by the gas, especially in higher GLR wells.
The way around would be to have mechanical barriers on both casing and annulus envelopes, which should be set after the kill, but also allow support for the fluid column to prevent its loss into reservoir.
However, the higher depletion would be, the higher the risks that increased overbalance above the plug may complicate its retrieval.

As @Regis Studer had shared earlier, the organizational aspects he described seem to me being the most common last decade, especially in major companies that have broad support structures.

However, frivolously referring again to post of Mr. Gibson, the approach in mature fields for the well control may (and should) be different from what we are learning in IWCF and IADC Well Control classes. Nevertheless, the importance of such differences is not recognized equally by all and every company and legislators.

I have developed specific course that addresses the methods of well control being complimentary to 'standard" well control practices, and - apart of having in published in 2016 on Petrolessons platform, also teach this class internally with my current and past companies. Should you be interested in more details, send me PM, Andrey.

Cheers, Merry Christmas and Happy Upcoming New Year! ​​

------------------------------
Sergey Chernenkov
I love Completion, Workover, Well Interventions and Integrity Engineering and Operations

Well, maybe we worked for companies with different skills and training for production hands.  Most of the ones I know personally have no concept of how to properly kill a well, pressure limitations based on the well configuration, the safety concerns--especially dual barriers, and would be hard pressed to do the volume calculations using a wellbore sketch (provided by drilling/completion), etc.

They focus mostly on things from the wing valve onward!  Not wellbore safety below the Christmas Tree.  They are just not trained in this area!  (This isn't a lack of intelligence, just exposure.)

Let a well man do the well work.  And a production hand do things from the wing valve onward!


Doug White
Sugar Land!
Original Message:
Sent: 01-03-2023 03:24 AM
From: Andrey Yugay
Subject: Well Killing and Securing Prior to Rig Entry

Dear colleagues, thanks a lot for all your feedback posted here and receive directly.
rgds
Andrey

------------------------------
rgds
Andrey
------------------------------


Original Message:
Sent: 01-02-2023 01:05 PM
From: Robert Pearson
Subject: Well Killing and Securing Prior to Rig Entry

This is an excellent topic that also merits re-posting to the Production & Completions Communities, since a lot of Well Intervention, Well Integrity Management and P&A work is carried out with Coiled Tubing, Service Rigs and Snubbing Units under the supervision of the Production Manager.

If the zone is only being temporarily killed and/or will be returned to production and the job cannot be performed under near balance conditions, the selection and removal of the loss circulation control materials and well servicing fluids is fundamentally an issue that merits input from the Production Engineers and Chemists/Flow Assurance Specialists, as well as the Well Engineers and Fluids Specialists and the Reservoir Management Team.

A multi-functional team needs to address the options (Proj. Mgt. Planning Phase 2) as well as the technical, operational and cost management and life of completion NPV risks.

I suspect the answer to the original question will vary between onshore; offshore; deep-water, HPHT or highly depleted reservoirs and the type of operation to be conducted by the rid or CTU unit. A horizontal sidetrack or deepening operation will be very different from the remediation of a gravel pack or leaky cement bond.

But, in my experience, the initial well kill was generally conducted by production and the verified by those managing the rig re-entry.

Thanks for a very interesting question that merits multi-functional discussion.
Regards
Bob


------------------------------
Bob Pearson
Technical Director,
Glynn Resources Ltd.
Calgary, Alberta, Canada


Original Message:
Sent: 12-28-2022 04:39 AM
From: Sergey Chernenkov
Subject: Well Killing and Securing Prior to Rig Entry

Andrey,

I see that your post being spread between the different technical groups now.

While I already answered in Drilling section, where @Dan Gibson had brought additional insights to which I, personally, fully concur, there are, perhaps, a few words to add for his statements support.

As nowadays the global industry deals mainly with mature fields at one or another state of depletion, the time factor between killing the well and commencement of the workover becomes more critical than in abnormally pressurized reservoirs. As Dan truly notices, a few days too early well killing will result in complete loss of overbalance and possible partial displacement of the kill fluid by the gas, especially in higher GLR wells.
The way around would be to have mechanical barriers on both casing and annulus envelopes, which should be set after the kill, but also allow support for the fluid column to prevent its loss into reservoir.
However, the higher depletion would be, the higher the risks that increased overbalance above the plug may complicate its retrieval.

As @Regis Studer had shared earlier, the organizational aspects he described seem to me being the most common last decade, especially in major companies that have broad support structures.

However, frivolously referring again to post of Mr. Gibson, the approach in mature fields for the well control may (and should) be different from what we are learning in IWCF and IADC Well Control classes. Nevertheless, the importance of such differences is not recognized equally by all and every company and legislators.

I have developed specific course that addresses the methods of well control being complimentary to 'standard" well control practices, and - apart of having in published in 2016 on Petrolessons platform, also teach this class internally with my current and past companies. Should you be interested in more details, send me PM, Andrey.

Cheers, Merry Christmas and Happy Upcoming New Year! ​​

------------------------------
Sergey Chernenkov
I love Completion, Workover, Well Interventions and Integrity Engineering and Operations

Bob,

In my 43 years in the industry on 5 continents including onshore, platform, JU, and Deepwater, the key was 'always' to make the drilling and completions organization under one leadership.  I have taken over organizations where they were separate and distinct (and rarely talked except maybe in the beer joint).  I was always successful getting the two engineering skills under one leadership and talking "professionally" during the well planning process.  Even on the rig (offshore) the completions foreman would/may come onboard but the drilling foreman (who had been there from the start) would be in overall charge (and in Deepwater, it was one and the same guy-no specialty foreman).  If we were going to do a distinct well repair/recompletion, the completions guy would normally be in charge from the start.

I have seen organizations in other companies where the completions foreman would even be in charge of running the production string/liner and cementing!  This is a waste of time and not necessarily in the completion guys skill set.

In the planning process (and execution), the drilling engineer doing the planning needs to understand what type of wellbore is desired and often times negotiating with the completions/production folks on what "is economic and can be done".  Then the well plan is for the purposes of effecting a completion that will produce the well as best as possible and economic.  The completion engineer then designs the procedures, tools, fluids, and completion required for the best result based on the agreed well organized with the drilling engineer!

Segregating and isolating duties and skills too much can cause confusion, lead to mistakes, miscommunication, and a "not my problem" attitude!

Happy New Year

Doug White
Sugar Land
Original Message:
Sent: 01-02-2023 01:05 PM
From: Robert Pearson
Subject: Well Killing and Securing Prior to Rig Entry

This is an excellent topic that also merits re-posting to the Production & Completions Communities, since a lot of Well Intervention, Well Integrity Management and P&A work is carried out with Coiled Tubing, Service Rigs and Snubbing Units under the supervision of the Production Manager.

If the zone is only being temporarily killed and/or will be returned to production and the job cannot be performed under near balance conditions, the selection and removal of the loss circulation control materials and well servicing fluids is fundamentally an issue that merits input from the Production Engineers and Chemists/Flow Assurance Specialists, as well as the Well Engineers and Fluids Specialists and the Reservoir Management Team.

A multi-functional team needs to address the options (Proj. Mgt. Planning Phase 2) as well as the technical, operational and cost management and life of completion NPV risks.

I suspect the answer to the original question will vary between onshore; offshore; deep-water, HPHT or highly depleted reservoirs and the type of operation to be conducted by the rid or CTU unit. A horizontal sidetrack or deepening operation will be very different from the remediation of a gravel pack or leaky cement bond.

But, in my experience, the initial well kill was generally conducted by production and the verified by those managing the rig re-entry.

Thanks for a very interesting question that merits multi-functional discussion.
Regards
Bob


------------------------------
Bob Pearson
Technical Director,
Glynn Resources Ltd.
Calgary, Alberta, Canada
------------------------------


Original Message:
Sent: 12-28-2022 04:39 AM
From: Sergey Chernenkov
Subject: Well Killing and Securing Prior to Rig Entry

Andrey,

I see that your post being spread between the different technical groups now.

While I already answered in Drilling section, where @Dan Gibson had brought additional insights to which I, personally, fully concur, there are, perhaps, a few words to add for his statements support.

As nowadays the global industry deals mainly with mature fields at one or another state of depletion, the time factor between killing the well and commencement of the workover becomes more critical than in abnormally pressurized reservoirs. As Dan truly notices, a few days too early well killing will result in complete loss of overbalance and possible partial displacement of the kill fluid by the gas, especially in higher GLR wells.
The way around would be to have mechanical barriers on both casing and annulus envelopes, which should be set after the kill, but also allow support for the fluid column to prevent its loss into reservoir.
However, the higher depletion would be, the higher the risks that increased overbalance above the plug may complicate its retrieval.

As @Regis Studer had shared earlier, the organizational aspects he described seem to me being the most common last decade, especially in major companies that have broad support structures.

However, frivolously referring again to post of Mr. Gibson, the approach in mature fields for the well control may (and should) be different from what we are learning in IWCF and IADC Well Control classes. Nevertheless, the importance of such differences is not recognized equally by all and every company and legislators.

I have developed specific course that addresses the methods of well control being complimentary to 'standard" well control practices, and - apart of having in published in 2016 on Petrolessons platform, also teach this class internally with my current and past companies. Should you be interested in more details, send me PM, Andrey.

Cheers, Merry Christmas and Happy Upcoming New Year! ​​

------------------------------
Sergey Chernenkov
I love Completion, Workover, Well Interventions and Integrity Engineering and Operations