Tag Archives: Poisson’s Ratio

Rock Mechanics Effect on Fracture Geometry and Dimensionless Fracture Conductivity of 2D Model KGD (Khristianovic-Geertsma-De Klerk) in Air Benakat Formation, Meruap Field (Published)

Hydraulic fracturing plays a great role in enhancing oil and gas reserves and daily production, and it has been, and will remain, one of the primary engineering tools for improving well productivity. This paper will discuss the effect of rock mechanics (Young’s modulus and Poisson’s ratio) on fracture geometry (fracture length and width) and dimensionless fracture conductivity designed using 2D model of KGD (Khristianovic-Geertsma-de Klerk), one of the hydraulic fracturing method proposed by Khristianovic & Zheltov (1955) and improved by Geertsma & de Klerk (1969). The study is carried out by doing sensitivity analysis on rock mechanics to the fracture geometry and dimensionless fracture conductivity calculation. The base result of fracture geometry created are respectively 57.552 ft and 0.231 inches of fracture length and width, with reservoir pay zone of 143 ft and dimensionless fracture conductivity of 4.449, after doing 16 iterations of calculation, the results are obtained with a final error percentage of 7.4×10-10 %. As the sensitivity analysis is done, results present the same effect between Young’s modulus and Poisson’s ratio on the fracture geometry and dimensionless fracture conductivity. The higher Young’s modulus or Poisson’s ratio obtained, the fracture length goes longer, the fracture width goes tiner, while dimensionless fracture conductivity goes lower. Otherwise, the lower Young’s modulus or Poisson’s ratio obtained, the fracture length goes shorter, the fracture width goes wider, while dimensionless fracture conductivity goes higher. Integrated approaches of empirical relationship are also generated to estimate easily the dimensionless fracture conductivity and fracture geometry of length and width with a certain value of Young’s modulus and Poisson’s ratio.

Keywords: Dimensionless Fracture Conductivity, Fracture Geometry, KGD, Poisson's Ratio, Rock Mechanics, Young's Modulus