Objective
To improve hydraulic fracturing technology it is important to create new frac fluid polymers with increased thermostability for use in a variety of formations. The scope of this project is the synthesis of new versatile polymers for frac fluid application.
Polymers were synthesized which showed good performance within the temperature range up to 150 deg. C as far as the rheological data were concerned.
The crosslinking reaction of aqueous polymersolutions was carried out by the addition of metal cations yielding macromolecular chelate-complexes, which show desirable viskoelastic properties.
The degradation of the gelled fluids under formation conditions can be performed by breaker systems. New breaker systems are under evaluation.
Continuing the synthesis of new polymers based on the information received so far and testing the properties our present systems will be further optimized.
A more detailed study of our systems under simulated formation conditions will be done at the University of Clausthal.
The studies carried out at the University of Clausthal, showed that fracturing fluids based on the synthesized new watersoluble polymers, performed, performed by far better compared to the present technical state as far as thermostability and tolerance to high saline brines are concerned.
However some formation damage was observed, which could possibly be avoided by changing the molecular weight of the polymer. Development into this directions is going on.
New oilbased fracturing fluids were developed, based on novel polymer-tenside systems. The rheological properties at different conditions are under evaluation.
Patent applications are presently filed.
More detailed information will be given in the next report.
A number of suitable monomer compounds were selected and model homopolymers synthesized. The thermostability of aqueous solutions of these homopolymers was tested under various conditions.
According to the results of these measurements model-copolymers were synthesized. The thermostability and rheologic behaviour of aqueous solutions were tested. The synthesis of co-polymers of different chemical composition and structure was carried out according to different polymerisation processes and initiator systems which were found to be suitable.
The polymers were characterized by measuring: molecular weight, residual monomer content, molecular weight distribution, rheological data at different temperatures and crosslinking behaviour to viscoelastic fluids.
Shear stability, pumpability and break-out under formation conditions were also tested.
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Programme(s)
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Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Topic(s)
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Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
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Funding Scheme
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Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
Coordinator
6000 FRANKFURT/MAIN 61
Germany
The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.