西南石油大学学报(自然科学版)

Previous Articles     Next Articles

A New Analytical Model of Heat Communication Judgment During Heat#br# Circulation Phase of Dual-horizontal SAGD

WU Yongbin1,2*, LI Xiuluan1,2, ZHAO Rui3, ZHOU You1,2, GUO Erpeng1,2   

  1. 1. Research Institute of Petroleum Exploration and Development,PetroChina,Haidian,Beijing 100083,China;
    2. State Key Laboratory of EOR,Research Institute of Petroleum Exploration and Development,Petrochina,Haidian,Beijing 100083,China;
    3. Xinjiang Oilfield Company,Petrochina,Karamay,Xinjiang 834000,China
  • Online:2016-02-01 Published:2016-02-01

Abstract:

The effect of heat circulation by steam injection is of a great importance to the steam chamber growth rate,SAGD
ramp-up rate,steam chamber dimension along horizontal section,tapping efficiency and ultimate recovery factor for SAGD
production. While the temperature of the formation between horizontal sections of injector and producer in a SAGD wellpair
is the crucial parameter to judge whether heat communication between injector and producer is enough or whether it is rational
to convert from circulation to SAGD production phase. According to the problems that the previous analytical model only
considers the thermal properties of the formation rock,the new analytical model of calculating heat communication including
the effect of formation rock,oil and water is established. The field data of well configuration and thermal properties of formation
rock,oil and water from a SAGD production area in China is taken as an example to calculate the temperature change and
distribution during SAGD circulation phase and the results are compared with those from previous model and numerical history
match. The calculation results show that the analytical results from the model proposed in this paper have quite good agreement
(>95%) with the numerical simulation results,which justifies its feasibility and accuracy. The heat communication during
SAGD circulation phase can be determined timely by using this model and it has a significance to guide the SAGD operation
during production phase successfully.

Key words: SAGD, steam, heat circulation, heat communication, heat diffusivity

CLC Number: