مقالههای Ahmad Lak
توجه: محتویات این صفحه به صورت خودکار پردازش شده و مقالههای نویسندگانی با تشابه اسمی، همگی در بخش یکسان نمایش داده میشوند.
نویسنده(ها): Mohmmad Hossein Heidari Sureshjani، Reza Azin، Ahmad Lak، Shahriar Osfouri، Robab Chahshoori، Foroozan Sadeghi، Marziyeh Lali، Shahab Gerami
اطلاعات انتشار: Iranian Journal of Chemistry and Chemical Engineering (IJCCE)، سي و پنجم،شماره۲(پياپي ۷۸)، ۲۰۱۶، سال ۰
تعداد صفحات: ۱۵
Production data analysis techniques have been widely used for estimating reservoir properties such as gas in place and average pressure. Knowledge of this information is crucial for proper reservoir management. The present study discusses the roadmap, challenges and uncertainties for analyzing production data in an Iranian gas–condensate offshore field. This work is an integrated study involving the quality check of production data, platform process simulation, orifice simulation, modeling choke performance, well modeling, and Rate Transient Analysis (RTA). The study is an inverse analysis which starts from production platform and continues down to the reservoir. To perform data analysis, we propose five general steps which are: Data gathering\extraction\quality check, well rate determination, well bottom hole pressure estimation, layer rate allocation, and reservoir property estimation. In this study, these steps are discussed elaborately. Furthermore, challenges of each step are presented and discussed. In addition, the required input and also missing data for each step is mentioned. Also, to cope with lack and\or uncertainties of data, feasible solutions are proposed for the current field situation as well as future developments. This paper can help petroleum engineers to know where to start and how to proceed to get to the final step of the analysis, i.e. estimating field gas in place. It also provides insights into challenges and uncertainties of the production analysis in gas–condensate.
۲Integrated Analysis of Choke Performance and Flow Behaviour in High–Rate, Deviated Gas–Condensate Wells
نویسنده(ها): Reza Azin *، Robab Chahshoori، Shahriar Osfouri، Ahmad Lak، Mohammad Hossein Heidari Sureshjani، Shahab Gerami
اطلاعات انتشار: Gas Processing Journal، دوم،شماره۱، ۲۰۱۴، سال ۰
تعداد صفحات: ۱۱
Understanding the flow behaviour in a gas well is crucial for future production strategies, obtaining bottomhole conditions from wellhead production data, analyzing production data and estimating reservoir properties. In this work, the pressure profile and flow regime are studied on four wells of a multi–well, multi–layer gas–condensate reservoir, producing at high rate. The wells are deviated and cased–holes, with the gas flowing through tubing to the wellhead. Here, a comprehensive quality assessment of data is presented. An algorithm is proposed to model wellhead chokes and determine production rates of individual wells from overall, commingled daily flow rates. The pressure profile and flow regime were determined in each well through back–calculation and nodal analysis. The bottomhole pressure is predicted. The best correlations are selected by comparing the model results with reported production logging tool (PLT) data. The rates of produced condensate and water (equivalent to gas) and their PVT properties, e.g. API of condensate, had little impact on choke calculations, which is due to high flow rate gas. The flow is shown to be gas–like at the bottom, which turns to mist flow near the wellhead. Liquid holdup is subject to the wellhead pressure and well flow rate. It decreases with an increase in wellhead pressure and gas flow rate. The findings here can be extended to other wells in the same reservoir, which can introduce guidelines for gascondensate well modeling.
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