... Abstract The continuing use of combined cross linked polymer, propellant and acid fracturing treatment technologies has resulted in additional reserve development in a mature waterflood field in Wyoming. These three technologies have been used in combination on over 40 wells during 1996...

... drilling fluid leaking off into the formation, as well as filter-cake impairment, must be eliminated to realize the full potential of horizontal completions. A common approach to minimizing such damage is the application of acids or strong oxidative breaker systems to dissolve filter-cake solids...

... Abstract Acidizing deviated wells is a technical challenge because the primary cementing is not always of high quality. Large communicating channels can develop behind the casing. Under such conditions, conventional selective acidizing is ineffective since the acid leaks off...

... Abstract Well stimulation treatments require adequate cleaning of the tubular prior to pumping any stimulation fluids. Current known methods of designing an iron scale removal tube clean treatment employ a. "Rule of Thumb" approach for estimating a sufficient volume of acid and the pump rates...

... Abstract Heavy oils are known to contain relatively high proportions of native carboxylic acids. Thus, in alkaline waterflooding, the acids react with the alkalis present in the water forming surfactant soap anions that subsequently adsorb at the interface and thereby lower the interfacial...

... Abstract Widespread belief in the positive effects of Hel acid on sandstone reservoirpermeability needs to be challenged. Results from this study show a variety ofresponses in the Cardium Formation ranging from large improvements in liquidpermeability to destruction of good reservoir rock...

... Abstract This paper describes the mechanics and operation of a new selective acid washing tool and its application in successfully stimulating the Arcs member of the Nisku formation in the Youngstown Field of Alberta. Case histories and recommendations are provided as to the wide ranging...

... Abstract Several disturbing results have been observed during recent studies into the compatibility of iron-contaminated acid with conventional additives and formation crudes. Along with the traditional problems of gellatinous iron hydroxide precipitation on acid spending, several additional...

... Abstract A unique diverting aid has been successfully used to reduce the incidence of acidizing into water in limestone and dolomite reservoirs. Proper application of this diverting aid has allowed excellent stimulation of hydro-carbon bearing formations previously only receiving very limited...

... Abstract A new chemical treatment has been developed to stimulate problem sandstone formations. This treatment is designed to overcome a commonly observed problem in which wells initially respond to matrix acidizing but show rapid production declines following treatment. These rapid declines...

... Abstract Matrix acidization has long been an important completion and stimulation tool. This paper discusses underlying concepts, treatment techniques, and results of acidizing both carbonates and sandstones. Introduction Acidization has been a useful process in initiating and promoting...

... Abstract Since its introduction to the Petroleum Industry in Canada in 1970, the Endless Tubing Unit is finding increasing application in oil, gas and injection well workovers. Gaseous nitrogen as well as various fluids including water, acid and cement have been pumped through the tubing...

... Abstract While acidizing has been an accepted and successful method of well stimulation for four decades, only recently has a truly engineered approach to acidizing begun to develop. Although most of thebasic data involved in acid treatment design still hold true, time and experience have...