Control Placement Of Scale Inhibitors In The Formation

By: venynx
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Diethylenetriaminepentatakis (methylene phosphonic acid) (DTPMP) is commonly used in oilfield for scale inhibition. In this study, Ca-DTPMP submicron-sized particles were prepared directly by chemical precipitation with the assistance of phosphino-polycarboxylic acid (PPCA). The influences of adsorbed PPCA, KC1 concentration and sonication on the transport and deposition kinetics of Ca-DTPMP particle suspensions in calcite and sandstone matrix were investigated. Adsorption of PPCA to Ca-DTPMP particles increases their negative surface charge and decreases particles deposition in a porous media. diethylenetriamine penta methylene phosphonic acid The mobility of PPCA-coated Ca-DTPMP particles decreases with increasing KC1 concentrations. Using sonication treatments the mobility of Ca-DTPMP particles at high KC1 concentration in porous media increased significantly. The retention and long term flow back performance of Ca-DTPMP particles were tested in Frio sandstone columns after 18 hours shut-in time to allow deposition. The results show that enhanced retention of Ca-DTPMP particles and slow dissolution of DTPMP are highly advantageous in slowing the phosphonate release from porous media, and ensuring successful inhibitor treatments in oil fields.

Control Placement Of Scale Inhibitors In The Formation With Stable Ca-DTPMP Nanoparticle Suspension And Its Transport In Porous Medium | Request PDF. Available from:

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