Laboratory tests were conducted to study the effects of using finely ground oil soluble resin as a diverting agent in hydrochloric-hydrofluoric acid treatments. The evaluation was conducted using a wellbore model which simulates varying permeability. These test results indicate that even though an even vertical distribution of fluids occurred when oil soluble resin was added continuously to all fluids, an inadequate ratio of HCl to HCl-HF acid was evident in the high permeability sections. This problem limits the effectiveness of a mixed acid system and may create acid induced inorganic precipitates. Based on results of the continuous diverting tests, a series of staged diverting evaluations were conducted. These results indicate that oil soluble resin may be effectively used in stages between acid stages to divert injected fluids.
Formation damage resulting from the use of unfiltered polymers during gravel pack completion operations has been addressed as it relates to HEC completion fluids. 1-5 However, other filtered polymer systems exhibit properties which, in specific applications, may out perform HEC systems. Thus, the performance characteristics of six commonly used polymer systems, hydroxyethyl cellulose (HEC), clarified xanthan gum (xc), HEC/XC blends, crosslinked carboxymethyl hydroxyet"vl cellulose (CMHEC:, hydroxypropyl guar (HPG), and standard xanthan gum (XCD), required additional evaluation, Fluid modelling was employed using a new two-stage filtration process (gel filtration) In whioh the viscosified fluids were optimally sheared and fine-filtered to improve sand placement efficiency and reduce formation damage. The data obtained from this study establishes uixing and filtration design criteria for optimizing completion techniques such as gravel packing, sand washing, polymer diverting, and lost circulation control. L. R. HOUCHIN, L. M. HUDSON --.. .fi m c mxnmm~mm P nnnnnt?rn r. D Uncutau'r 1 t'ki J.>4UU 0. bnu An J. JJLv, u. undJJnu Lu, u n. L8-0SL44.-*A
Oxide thin films are finding applications in a wide range of energy and information technologies, from ion conductors through photovoltaics and thermoelectrics to dielectrics, multiferroics and capacitors. Each of these technologies requires a thorough understanding of the materials chemistry of the oxide film and its interactions with the environment, substrate etc. Whilst in each technology area there may be materials differences, much of the materials chemistry optimisation may be common. For example, common families of oxides are employed, ABO3 perovskites in particular, and in this there are areas where discussion between user communities can prove mutually beneficial. It is the purpose of this meeting to foster an exchange of ideas between the relevant energy and information themes with the overall aim of provoking extensive discussion of the advances that materials chemistry can make in thin film applications.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.