DMF新型超分子暂堵剂研发及性能评价

Abstract

Abstract:

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

Xu Kun,Li Da,Guo Yujie,Fan Xiliang,Zhao Liqiang. Design and property evaluation of a novel supermolecule temporary plugging agent DMF[J].Reservoir Evaluation and Development, 2019, 9(1): 51-55.

Figures/Tables 6

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References 23

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

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