Comparison of Decline Curve Analysis and Material Balance Method as Procedure for Estimating Reserve

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[14] Taha,Y., Naguib, A., Abdelhafiz, M., Hegazy, G. & Mahmoud, O. (2023). Probabilistic Decline Curve Analysis: State-of-the-Art Review. Energies. 16. 10.3390/en16104117. Table 1: PVT DATA OF A2 RESERVOIR Pressure (���) � (��/���) �� (���/���) � � 10� −3 (��/��� ) 4487 1.308 (� ) 811(�� ) 0.842 0..639(� ) 4444 1.301 799 0.843 0.644 4416 1.298 793 0.840 0.647 4370 1.297 788 0.836 0.650 4332 1.293 785 0.834 0.654 4298 1.290 779 0.833 0.659 4260 1.287 774 0.831 0.653 4228 1.285 769 0.829 0.666 4230 1.286 772 0.829 0.667 4257 1.289 778 0.830 0.665 4282 1.299 780 0.833 0.665 Table 2: MBE TABLE OF VALUES Pressure (���) � (����) �� (��/���) �� (��/���) ��� (��/���) �� + ��� � ��� � ⁄ (� + ���) � ⁄ (� + �� ) 4487 4444 2.5464 0.00073 0.0102 0.00714 0.00787 1.63 323.507 207.116 4416 5.337 0.00165 0.0164 0.01148 0.01313 5.67 406.474 431.835 4370 8.410 0.00395 0.0225 0.01575 0.01917 11.82 426.904 600.000 4332 12.369 0.00200 0.0310 0.0217 0.02370 20.22 521.899 853.165 4298 16.194 0.00309 0.0409 0.0286 0.03169 30.13 511.013 950.773 4260 20.751 0.00316 0.0287 0.02009 0.02325 41.58 892.516 1788.387 4228 26.194 0.00497 0.0553 0.03871 0.04368 54.53 599.679 1248.397 4230 28.2560 0.00401 0.0573 0.04011 0.04412 67.14 640.435 1521.759 4257 29.360 0.00295 0.0532 0.03724 0.04019 77.29 731.276 1923.115 4282 30.6540 0.01160 0.0532 0.03724 0.04884 84.81 627.641 1736.486 � Table 3: PETROPHYSICAL DATA OF A2 RESERVOIR Porosity 15 % Connate water saturation 23 % � �� Net to gross ratio (�) 0.73 % Gas- oil-contact (GOC) 10262 (�� − ��) Oil-water-contact 10348 (�� − ��) (OWC) Average sand thickness 63 (��) Area of oil leg (A) 85000 (�����) Permeability (K) 585 �� Water plus rock 0.7 � 10 −6 �� −1 compressibility Aquifer configuration 40 Water viscosity 0.53 �� Table 4: SUMMARY OF RESULTS Method Results Decline curve analysis 210 ���� Material balance 213 ����

@article{1713216,
      author = {Omoniyi Omotayo Adewale},
      title = {Comparison of Decline Curve Analysis and Material Balance Method as Procedure for Estimating Reserve},
      journal = {Iconic Research And Engineering Journals},
      year = {2026},
      volume = {9},
      number = {7},
      pages = {174-181},
      issn = {2456-8880},
      url = {https://www.irejournals.com/formatedpaper/1713216.pdf},
      abstract = {Reserve estimation is by far an essential aspect with regards to Petroleum Engineering jobs. Several methods have been developed for estimating and evaluating reserve. The present work therefore focused on comparing two of the various methods of estimating reserve. These methods are: Decline Curve Analysis and Material Balance.  The decline curve analysis was based on observed production history. The reservoir used in this paper shows an exponential decline trend with a constant; thus, the reserve was estimated with this method. The Material balance method was carried out using Pressure, Volume and Temperature (PVT) data, pressure and production history of the reservoir. The reservoir used as a case study has a combination drive mechanism; thus, the water influx was calculated using Hurst and Van Everdingen model. The Havlena and Odeh linear form of material balance equation was employed. The reserve estimate obtained with Decline Curve Analysis and material balance methods are in close agreement.},
      keywords = {Decline Curve, Exponential decline, Material Balance, Reserve, Reservoir},
      month = {January},
      doi = {https://doi.org/10.64388/IREV9I7-1713216}
  }