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Geomechanics and Engineering
  Volume 15, Number 1, May20 2018 , pages 677-686
DOI: https://doi.org/10.12989/gae.2018.15.1.677
 


Analysis on Geo-stress and casing damage based on fluid-solid coupling for Q9G3 block in Jibei oil field
Youjun Ji and Xiaoyu Li

 
Abstract
    Aimed at serious casing damage problem during the process of oilfield development by injecting water, based on seepage mechanics, fluid mechanics and the theory of rock mechanics, the multi-physics coupling theory was also taken into account, the mathematical model for production of petroleum with water flooding was established, and the method to solve the coupling model was presented by combination of Abaqus and Eclipse software. The Q9G3 block in Jibei oilfield was taken for instance, the well log data and geological survey data were employed to build the numerical model of Q9G3 block, the method established above was applied to simulate the evolution of seepage and stress. The production data was imported into the model to conduct the history match work of the model, and the fitting accuracy of the model was quite good. The main mechanism of casing damage of the block was analyzed, and some wells with probable casing damage problem were pointed out, the displacement of the well wall matched very well with testing data of the filed. Finally, according to the simulation results, some useful measures for preventing casing damage in Jibei oilfield was proposed.
 
Key Words
    casing damage; seepage mechanics; fluid-solid coupling; mathematical model; numerical analysis
 
Address
Youjun Ji: 1.) Sichuan Key Laboratory of Natural Gas Geology, Southwest Petroleum University, Chengdu, China
2.) Ecological Security and Protection Key Laboratory of Sichuan Province, Mianyang Normal University
3.) School of Geoscience and Technology, Southwest Petroleum University, Chengdu, China
4.) State Key Laboratory of Reservoir Geology and Development Engineering, Southwest Petroleum University, Chengdu, China

Xiaoyu Li: 1.) Sichuan Key Laboratory of Natural Gas Geology, Southwest Petroleum University, Chengdu, China
2.) School of Geoscience and Technology, Southwest Petroleum University, Chengdu, China
 

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