底水稠油油藏润湿性对水锥回升的影响
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1.中国石油大学华东石油工程学院;2.中国石油化工股份有限公司胜利油田分公司河口采油厂

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国家重点研发计划“稠油化学复合冷采基础研究与工业示范”(项目编号2018YFA0702400),山东省自然科学基金“纳米颗粒稳定乳状液在油藏孔隙介质中形成条件及流度控制机理研究”(项目编号ZR2019MEE085)。


The effects of wettability on water coning in bottom water reservoirs
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School of Petroleum Engineering,China University of Petroleum East China

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    摘要:

    岩石润湿性对底水油藏压锥后延缓水锥回升具有重要影响,但其影响程度不明确。鉴于此以接触角为指标构筑具有不同润湿能力的4种润湿调节体系,将其溶于油溶性降黏剂,并对其性能进行评价。在此基础上,定量描述了润湿性和采出物性条件之间的内在联系,进一步说明了润湿性对抑制水锥回升的影响程度。结果表明:油湿润湿剂作用后的储层抑制底水回升的效果最好,平衡压力比达到3.75,净采出程度提高15.17%;而强水湿润湿剂作用后的储层平衡压力比仅为0.54,净采出程度提高6.51%。润湿性和采出物性条件之间表现出明显的规律性。调整储层润湿性可以有效抑制水锥的回升,提高原油采出程度。

    Abstract:

    The wettability of the rock has an important influence on the delay of the water coning recovery after the bottom water reservoir is pressed, but the degree of its influence is not clear. In view of this, four wetting adjustment systems with different wetting abilities were constructed with the contact angle as the index of wetting agent, which were dissolved in oil-soluble viscosity reducer, and their properties were evaluated. On this basis, the intrinsic relationship between wettability and production property conditions was quantitatively described, and the degree of influence of wettability on inhibiting water coning recovery was further illustrated. The results show that the reservoir under the action of oil wetting agent has the best effect of inhibiting bottom water recovery, the equilibrium pressure ratio reaches 3.75, and the net recovery degree increases by 15.17%. However, the equilibrium pressure ratio of the reservoir under the action of strong water wetting agent is only 0.54, and the net recovery is increased by 6.51%. There is an obvious regularity between wettability and produced physical properties. Adjusting the wettability of the reservoir can effectively restrain the rise of the water cone and improve the oil recovery.

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  • 收稿日期: 2022-01-12
  • 最后修改日期: 2022-02-17
  • 录用日期: 2022-02-23
  • 在线发布日期: 2022-10-12
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