Reservoir Evaluation and Development ›› 2019, Vol. 9 ›› Issue (1): 51-55.

• Petroleum Engineering • Previous Articles     Next Articles

Design and property evaluation of a novel supermolecule temporary plugging agent DMF

Xu Kun1,Li Da2,3,Guo Yujie4,Fan Xiliang2,3,Zhao Liqiang1   

  1. 1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, China
    2. Oil and Gas Technology Research Institute of Changqing Oilfield, Xi'an, Shaanxi 710018, China
    3. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Xi'an Shaanxi 710018, China
    4. NO.5 Gas Production Plant of Changqing Oilfield, CNPC, Ordos, Inner Mongolia 017300, China
  • Received:2018-02-02 Online:2019-02-26 Published:2019-02-15


Sulige gas field is a typical tight-gas reservoir whose ultralow permeability comes to a problem to a noble stimulation technology with its name refracturing coupling with SRV fracturing, owing to the failure of injection by conventional plugging agent, which aims to plug existing fractures and create more multistage fractures. So we designed the novel supermolecule temporary plugging agent--DMF and conducted a series of tests including gelling, break gelling, and temporary plugging steering. The results had demonstrated that the new plugging agent DMF was responded to high temperature, about 100 ~ 110℃, transforming into high viscosity supramolecular gel from low viscosity liquid at low or normal temperature, plugging existing fractures. When the temperature got higher, the gel of DMF turned into liquid automatically. Then, the DMF showed a better performance(122.92 MPa/m) of temporary plugging steering than that of conventional plugging agent, demonstrating a more desirable diversion agent for tight-gas reservoirs.

Key words: Sulige, tight reservoir, supermolecule, heat-induced gel, temporary plugging agent

CLC Number: 

  • TE357