致密储层束缚水膜厚度计算方法及影响因素研究进展

doi:10.3969/j.issn.1006-6535.2023.04.001

摘要/Abstract

摘要： 针对致密储层束缚水膜厚度的计算方法种类较多,在实际研究中无法准确选择的问题,通过文献调研,对近年来致密储层束缚水膜厚度的计算方法和影响因素进行总结。研究表明:致密储层束缚水膜厚度计算方法分为以束缚水膜体积与孔喉表面积的比值为机理的宏观计算方法,以及将基质简化为毛细管模型或从微元角度出发的微观推导方法;束缚水膜分为初始水膜、驱替后水膜和渗吸后水膜,初始水膜厚度受储层的相对湿度、储层深度和渗透率等因素影响,驱替后水膜厚度受驱替压力、渗透率和孔隙度等因素影响,渗吸后水膜厚度受含水饱和度、离子质量浓度和基质组成等因素影响。该研究对计算致密储层束缚水膜厚度方法的选择以及提高采收率研究有一定的借鉴意义。

关键词: 束缚水膜厚度, 致密储层, 影响因素, 渗吸, 驱替

Abstract: To address the problem that there are many kinds of calculation methods for the thickness of irreducible water film in tight reservoirs, and the method cannot be accurately selected in the actual research, the calculation methods and influencing factors of irreducible water film thickness in tight reservoirs are summarized in recent years. The study shows that the calculation methods for irreducible water film thickness in tight reservoirs are divided into macroscopic calculation methods based on the ratio of irreducible water film volume to pore throat surface area and microscopic derivation methods that simplify the matrix into capillary model or from the perspective of microelements; the irreducible water film is divided into initial water film, post-displacement water film and post-imbibition water film, and the thickness of the initial water film is influenced by the relative humidity, reservoir depth and permeability of the reservoir, and the thickness of the post-displacement water film is influenced by the displacement pressure, permeability and porosity, and the post-imbibition water film thickness is influenced by the water saturation, ion mass concentration and matrix composition. This study has implications for the selection of calculation methods for the irreducible water film thickness in tight reservoirs and the study of recovery enhancement.

Key words: irreducible water film thickness, tight reservoir, influencing factors, imbibition, displacement

中图分类号:

TE348

刘志楠, 张贵才, 王增林, 葛际江, 杜勇. 致密储层束缚水膜厚度计算方法及影响因素研究进展[J]. 特种油气藏, 2023, 30(4): 1-9.

Liu Zhinan, Zhang Guicai, Wang Zenglin, Ge Jijiang, Du Yong. Research Progress on Calculation Methods and Influencing Factors of Tight Reservoir Irreducible Water Film Thickness[J]. Special Oil & Gas Reservoirs, 2023, 30(4): 1-9.

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