A New Methodology to Define Net Pay Zone in Gas Reservoirs

Publish Year: 1399
نوع سند: مقاله ژورنالی
زبان: English
View: 508

This Paper With 18 Page And PDF Format Ready To Download

  • Certificate
  • من نویسنده این مقاله هستم

استخراج به نرم افزارهای پژوهشی:

لینک ثابت به این Paper:

شناسه ملی سند علمی:

JR_IJOGST-9-2_002

تاریخ نمایه سازی: 7 مرداد 1399

Abstract:

Net pay thickness is defined as that portion of a reservoir which contains economically producible hydrocarbons with today’s technology, prices, and costs. This thickness is a key parameter of the volumetric calculation of in-place hydrocarbons, well test interpretation, and reservoir characterization. A reservoir interval is considered as net pay when it contains hydrocarbons that can flow at an economic rate. Therefore, to define net pay, cutoffs of hydrocarbon storage properties besides flow properties of reservoir rock are necessary. Frequently, petrophysical log-derived rock storage properties like porosity and water saturation are linked to core measured properties like permeability to find a relation between them. Then, by use of a fixed limiting value for permeability, log-derived properties cutoffs are determined. The basic problem of these methods is related to permeability cutoff, since in most cases there is no knowledge about it, and the permeability cutoff can differ from field to field or even well to well. A new methodology has been developed to find a logical permeability cutoff for gas reservoirs which can differ for different wells and/or fields. This technique is based on gas flow through porous media in tight rocks. Accordingly, a relationship between porosity and permeability is derived as a cutoff value at reservoir pressure and temperature, which is considered as a discriminator plot. Then, the core data of the specified reservoir are added to this plot and the data points reflecting net pay zone are identified. This technique has been applied to four real gas reservoirs in Iran and indicated acceptable results confirmed by the drill stem test (DST) and production data. The results show that the proposed procedure is less dependent on experts’ experiences and acts as a straightforward and powerful tool for the refinement of net pays. In addition, the cutoff values calculated from this method contain a scientific base supporting the main procedure.

Keywords:

Knudsen Number , Net Pay Zone , Porosity and Permeability Cutoff , Tight Gas Reservoirs

Authors

Mehdi Qassamipour

Ph.D. Student, Faculty of Petroleum and Natural Gas Engineering, Sahand University of Technology, Tabriz, Iran

Elnaz Khodapanah

Associate Professor, Faculty of Petroleum and Natural Gas Engineering, Sahand University of Technology, Tabriz, Iran

Seyyed Alireza Tabatabaei-Nezhad

Professor, Faculty of Petroleum and Natural Gas Engineering, Sahand University of Technology, Tabriz, Iran

مراجع و منابع این Paper:

لیست زیر مراجع و منابع استفاده شده در این Paper را نمایش می دهد. این مراجع به صورت کاملا ماشینی و بر اساس هوش مصنوعی استخراج شده اند و لذا ممکن است دارای اشکالاتی باشند که به مرور زمان دقت استخراج این محتوا افزایش می یابد. مراجعی که مقالات مربوط به آنها در سیویلیکا نمایه شده و پیدا شده اند، به خود Paper لینک شده اند :
  • Abbasi, S., Singh, T.N., and Pritchard, T., Error and Impact ...
  • Boyer, R.C., Geologic Description of East Velmawest Block, Sims Sand ...
  • Desbrandes R., Encyclopedia of Well Logging, Editions Technip, Paris 584 ...
  • Harfoushian, J.H. and Suriyanto, O., Net Pay Cutoff Determination Using ...
  • Lala, A. S. and Nahla, A.A., Controls of Pore Throat ...
  • Li, D. and Dria, M.A., Cutoff or Separation A New ...
  • Mahbaz, S., Sardar, H., Namjouyan, M., and Mirzaahmadian, Y., Optimization ...
  • Masoudi, P., Tokhmechi, B., Zahedi, A., and Jafari, M.A., Developing ...
  • Masoudi, P., Tokhmechi, B., and Ansari Jafari, M., Application of ...
  • Masoudi, P., Identifying Net Pay Zones in Oil Wells by ...
  • Masoudi, P., Arbab, B., and Mohammadrezaei, H., Net Pay Determination ...
  • Saboorian-Jooybari, H., A Structured Mobility-based Methodology for Quantification of Net-pay ...
  • Serway, R., Physics for Scientists and Engineers with Modern Physics, ...
  • Shi, J., Zhang, L., Li, Y., Yu, W., He, X., ...
  • Shi, X., Lv, H., Li, X., Cui, Y.J, and Li, ...
  • Skalinski, M., Mallan, R., Edwards, M., Sun, B., Toumelin, E., ...
  • Worthington, P.F. and Cosentino, L., The Role of Cutoffs in ...
  • Worthington, P.F., The Application of Cutoffs in Integrated Reservoir Studies, ...
  • Worthington, P.F. and Majid, A.A., The Use of Net-pay Concepts ...
  • Xu, W., Zhang, X., Shang, F., Fang, L., Liu, J., ...
  • Yang, T., Cao, Y., Wang, Y., Liu, K., He, C., ...
  • نمایش کامل مراجع