›› 2014, Vol. 35 ›› Issue (2): 1-1.

   

Transient Pressure Behavior Analysis and Direct Synthesis Technique for Horizontal Well Intersected by Finite Conductivity Fractures

WANG Junlei1 , WEI Yunsheng1 , CHEN Peng2a , HAN Huiping2a , HUANG Yougen2b,2c   

  1. (1. Research Institution of Petroleum Exploration & Development, PetroChina, Beijing 100083, China2. PetroChina Changqing Oilfield Company, a.Technological Development Department, b.Research Institution of Exploration & Development, c.National Engineering Laboratory for Exploration & Development of LowPermeability Oil & Gas Fields, Xian, Shaanxi 710021, China)
  • Online:2019-01-01 Published:1905-07-11

Abstract: In the model of horizontal well intersected by finite conductivity fractures (HWFCF), a dynamic factor was derived to simulate the characteristic of flowing in fracture. Pressure superposition principle was incorporated to deal with the interaction of fractures in Laplace transform. Production rates from fractures and wellbore pressure constituted the system of linear equations which could be solved by utilizing stehfest numerical inversion and numerical iteration method. The result shows that the whole flow duration can be divided into five segments: bilinear flow, linear flow, radial flow, compound linear flow and compound radial flow. Meanwhile, the approximate expressions of pressure and derivative in different segments were presented based on the equivalent wellbore radius and asymptotic approximation. Applying the principle of Tiab’s direct synthesis technique to the case of HWFCF, formation permeability, facture length, finite conductivity,distance and skin factors were calculated without using the type curve matching procedure or regression

CLC Number: