# مقالههای m dadvar

**توجه:**محتویات این صفحه به صورت خودکار پردازش شده و مقالههای نویسندگانی با تشابه اسمی، همگی در بخش یکسان نمایش داده میشوند.

##### ۱the effect of preparation conditions on nano scale gold based catalyst supported on Au\Fe2o3

اطلاعات انتشار:
چهاردهمین کنگره ملی مهندسی شیمی ایران،
سال ۱۳۹۱

تعداد صفحات:
۵

in has been established that the gold containing catalysts such as Au\Fe2o3 display high catalytic activity in a series of important reactions the paper concerns the preparation of nano scale Au\Fe2o3 catalyst by a deposition –precipitation method in order to optimize experimental conditions and find out the effective factor in preparing Au\Fe2o3 catalyst taguchi design method was used the effects of the calcination temperature reaction time and the HAuCl4 .3H2O concentratin on particle size and gold loading and specific surface area of the catalyst particles are investigated throw XRD X–ray diffraction bet bruuner –emmett–teller SEM scanning electron micriscopy techniques.<\div>

##### ۲Determining Reservoir Parameters from Two Phase Naturally Fractured Reservoirs Well Test Analysis, Unsteady State Flow Regime, Considering Wellbore Storage Effect–TDS Technique

اطلاعات انتشار:
چهاردهمین کنگره ملی مهندسی شیمی ایران،
سال ۱۳۹۱

تعداد صفحات:
۱۱

The main objective of this paper is to present a practical interpretation of the pressure behavior of two phase oil and water naturally fractured reservoirs. Well test estimates the reservoir parameters bystudying flow regimes which are observed during production. From starting of production first radialflow regime, transient period and secondary radial flow regime will be observed. But by existing of well–Bore–Storage effect during production, the first radial flow regime will be disappeared, soconventional and type curve methods which are based on using all flow regimes are useless. Synthesis Direct method is a new technique that solves the problem by developing simple equations. This technique couples the characteristic points and lines from log–log plot of pressure and pressurederivative data resulting in simple equations to solve for the desired reservoir parameters. In thistechnique there is no need to observing all flow regimes. On the other part the matrix–to–fracture interporosity parameter (l ), and fracture storativity (w ), aresubject to changes during the life of an oil field. This depends entirely on the nature of saturationcondition both in fractures and matrix blocks. Failure to consider two phase flow parameters will result in inaccurate estimation of reservoir parameters. Because of the high amount of this type ofbehavior in many reservoirs worldwide, developing appropriate method is very important. In this paper the effect of wellbore storage is analyzed on log log pressure and pressure derivative curve vs. time for a single well in the two phase oil and water naturally fractured reservoirs with unsteady stateflow regime. Application of direct synthesis technique is presented for this case and several correlations is offered for calculation of reservoir parameters. Finally the capability of technique and the accuracy of the equations is studied through simulated test example<\div>

##### ۳Application of TDS Technique in the Well Testing of Twophase,Oil and Water Naturally Fractured Reservoirs with Unsteady State Flow Regime

اطلاعات انتشار:
هفتمین کنگره ملی مهندسی شیمی،
سال ۱۳۹۰

تعداد صفحات:
۱۰

Well test is one of the most important methods for getting information about well and reservoir condition. Up to now different methods of well testing consist of conventional method, type curves method and direct synthesis method are developed by researchers. The direct synthesis technique couples the characteristic points and lines from log–log plot of pressure and pressure derivative data resulting in simple equations to solve for the desired reservoir parameters. This method is used for naturally fractured reservoirs, multi rate testing in naturally fractured reservoirs and many other conditions.Under two phase flow condition, two phase flow parameters will affect on pressure pattern. Without proper consideration of two phase flow, the estimated values for λ and ω by using single phase methods are subject to errors. As many reservoirs in Iran are naturally fractured reservoirs, and water injection is one of the most important EOR projects using in this reservoirs, sometimes will be observed that water reaches from injection well to the production well and causes error.So in this project we use direct synthesis technique in two phase naturally fractured reservoirs for the first time. the flow from matrix to fracture is unsteady state and by using of relative permeability and viscosity, develop new equations to calculating reservoir parameters<\div>

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