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- W3095734933 abstract "In the process of the development of fractured tight reservoir, there are some problems such as high injection pressure and poor effectiveness of production. At present, tight reservoirs mostly adopt fracturing development. When injection pressure is higher than fracture opening limit, connected oil wells show severe flooding, water-flooding efficiency is extremely poor. In order to solve the technical problems of fractured tight reservoir development, In this paper, based on the physical and chemical characteristics of surfactants, and by means of instrumental monitoring and numerical simulation, the optimization of the composition of the perming-absorbing liquid and the optimization of the injection process parameters in the tight oil reservoir in Daqing Toutai were studied and simulated. The results show that the capillary force is the main force in the process of osmosis and oil recovery, and the surfactant can change the rock into water wetness, which is beneficial to osmosis and absorption, and the oil washing effect of surfactant also improve the oil displacement efficiency. But it reduces the interfacial tension between oil and water, reduces the capillary force, and is not conducive to the imbibition. Therefore, it is necessary to choose a suitable concentration of the imbibition liquid to take account of both wettability and interfacial tension. Toutai oil field has poor sensitivity and stronger adaptability to solvent water mineralization. Nonionic surfactant solution(DWS, 0.2 %) is recommended for the imbibition in the target area of the Toutai oil field, injection process parameters range: the injection timing (water cut during injection) is 40 % to 60 %, the injection volume is 4000m3 to 5000m3, the well shut-in time is two months to three months, the cycle of huff and puff is 1.5 to 2.0 years, and the injection velocity is 30m3/d to 40m3/d. It provides the basis for the target reservoir technology decision and has important theory and application value." @default.
- W3095734933 created "2020-11-09" @default.
- W3095734933 creator A5078210600 @default.
- W3095734933 date "2020-11-04" @default.
- W3095734933 modified "2023-09-23" @default.
- W3095734933 title "Study On Imbibition Fluid Preferred And Injection Parameters In Fractured Tight Reservoir— A Case From Daqing Toutai Oilfield" @default.
- W3095734933 doi "https://doi.org/10.1088/1755-1315/585/1/012126" @default.
- W3095734933 hasPublicationYear "2020" @default.
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