Alexandra Bech Gjørv, CEO of SINTEF, opened the conference. Photo: SINTEF

Experimental P&A research for the North Sea

21.06.2017

The latest within P&A research and development was presented in Trondheim 20-21 March 2017. DrillWell was well represented with three presentations.

SINTEF Petroleum hosted the conference where the emphasis was on relevant experimental R&D within P&A. Approximately 160 people attended the conference that consisted of 24 presentations, a tour of SINTEF’s laboratory facilities and a panel debate at the very end. The entire program can be found here.

Alexandra Bech Gjørv, CEO of SINTEF, opened the conference. She emphasized the importance of P&A in a national context, as well as the need for more innovative and cost-efficient technologies and solutions. A keynote presentation was given by Pål V. Hemmingsen from Statoil, who described Statoil's views and priorities within P&A research.

Torbjørn Vrålstad from SINTEF and program manager for DrillWell Program 3 gave a presentation entitled "What is the sealing ability of plugs?" The presentation was based upon results from DrillWell-projects "Life cycle cement integrity" and "Improved P&A", and included experimental findings on cement plug integrity as well as long-term durability tests of cement samples.

Sigmund Stokka from IRIS and centre manager of DrillWell. Photo: IRIS

Sigmund Stokka from IRIS and centre manager of DrillWell gave a presentation entitled "Can tubing be left in the hole?” The presentation described full-scale cementing tests performed as a part of DrillWell-project "Improved P&A", and was previously presented at SPE/IADC Drilling Conference 2016 (SPE/IADC 178840).

Dave Gardner from IRIS gave a presentation entitled “Cement barrier evaluation lab”. He talked about how DrillWell is establishing a reference laboratory facility for cement (barrier) logging and evaluation as a part of DrillWell-project "Technologies for barrier evaluation and P&A".

Maria Barrio, who was a part of SINTEF's organizing committee, was pleased with the conference: "We are very pleased that about 160 people from 75 different companies attended the conference. Also, we received genuine positive feedback from the participants at the conference. Participants were particularly pleased to receive a tour of our laboratories and that we included topics such as nuclear waste storage and CO2 in a P&A-setting on the program."

Lab tour
Before the conference dinner, a tour of relevant laboratory facilities at SINTEF was arranged for the participants.

lab-tour1 rs2

Sigurd Bakheim and Jørn Stenebråten presented the laboratory set-up for research on “shale as a barrier”. The objective is to find out which types of shales, and under which circumstances, they collapse and creep towards the casing. Another important aspect is to determine the sealing-ability of the shale barrier.

lab-tour2

Ragnhild Skorpa presented the unique experimental cement sheath integrity set-up that has been developed in DrillWell-project "Life cycle cement integrity". The annular cement is an important barrier during P&A as well as during production, and the down-scaled set-up consisting of casing, cement and real rocks demonstrates how temperature and pressure cycles can damage the cement sheath. In addition, Nils Opedal presented the experimental set-up for cement plug integrity testing, also constructed in DrillWell-project "Life cycle cement integrity".

lab-tour3

Ali Taghipour demonstrated a hole cleaning flow loop that is also used for cementing experiments and casing wash and retrieval tests. Fluid flow and cuttings transport in different angles and wellbore geometries are investigated in this loop, and it was also used for the cement displacement experiments in DrillWell-project "KPN Cementing irregular wellbore geometries".

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