Controlled release of colloidal particles and remediation: Experimental investigation and modelling
Proceedings - SPE International Symposium on Oilfield Chemistry, ISSN: 1046-1779, Vol: 1, Page: 192-202
2011
- 5Citations
- 9Captures
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Conference Paper Description
Gas production from gas wells or storage reservoirs is sometimes associated with solid particles eroded from the rock matrix. This phenomenon often called sand production can cause damages to the equipments, leading to choke the wells under their full capacity. Colloid release is often associated as a precursor of larger solid production and clay release can be a forecast of inter-granular cement erosion. Injections of dilute polymer/microgel solutions form a small part of the techniques employed today to deal with sand production in gas and oil wells. Nevertheless they could be used more often as a remedy against starting sand production problems as shown through recent field applications. The paper presents laboratory experiments carried out with model systems to reproduce particle generation and their transport in porous media. The approach consists in following the evolution of the colloidal particle detachment after ionic strength reduction and in defining the key parameters for release rate prediction. A different behaviour is highlighted at short and long time and the model, built to predict the colloid production evolution, is based on the introduction of two different time scales of the eroded rate. The laboratory experiments demonstrate the great efficiency of polymer/microgel treatments. The proportion of fines produced decreases drastically when the surface coverage related to the adsorption rate increases. The use of the model to describe the effect of the chemical treatment helps to show that this one does not modify the mode of production of fines but significantly reduces the quantity of fines likely to be carried away from the pore surface. Copyright 2011, Society of Petroleum Engineers.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=79960279811&origin=inward; http://dx.doi.org/10.2118/140892-ms; http://www.onepetro.org/doi/10.2118/140892-MS; http://www.onepetro.org/google/Papers/SPE/eLibrary_Papers/spe/2011/11OCS/SPE-140892-MS/SPE-140892-MS-P.pdf?id=SPE-140892-MS&soc=SPE; https://onepetro.org/SPEOCC/proceedings/11OCS/11OCS/SPE-140892-MS/150952
Society of Petroleum Engineers (SPE)
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