吉林大学学报(工学版) ›› 2015, Vol. 45 ›› Issue (4): 1281-1287.doi: 10.13229/j.cnki.jdxbgxb201504037

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Grid subdivision technology for multiphase flow simulation with complex geological condition

YANG Yan-lin, JING Jing, YANG Zhi-jie, XU Tian-fu, WANG Fu-gang   

  1. Key Laboratory of Groundwater Resources and Environment,Ministry of Education, Jilin University, Changchun 130021,China
  • Received:2014-04-08 Online:2015-07-01 Published:2015-07-01

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Abstract: Under complex geological condition, grid subdivision technology influences the accuracy of multiphase flow simulation. To meet the need of grid subdivision for multiphase flow simulation, a new algorithm is proposed to construct Perpendicular Bisection (PEBI) mesh of arbitrary shape with any constraints. This proposed algorithm for generating 2D and 3D PEBI grid includes five steps, e.g. point layout, triangle subdivision, unqualified triangles identification and point layout adjustment, Thiessen polygon generation, and topology reconstruction. In this process, various constraints (vertical wells, horizontal wells and faults) are reduced to point constraints, line constraints and area constraints, respectively. To provide a flexible way of arranging the point location, several common methods were expounded. The PEBI grid was created base on Thiessen polygon topology reconstruction. The proposed algorithm was applied to PEBI grid generation of several typical complicated geological conditions. The results demonstrate the feasible, simple and flexible characteristics of the proposed algorithm.

Key words: computer application, PEBI grid, distribution approach, triangular subdivision

CLC Number: 

  • TP391
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