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公开(公告)号：US10301532B2
公开(公告)日：2019-05-28
申请号：US15073302
申请日：2016-03-17
Applicant: Chevron U.S.A. Inc.
Inventor： Jagannathan Mahadevan , Nariman Fathi Najafabadi , Adwait Chawathe
Abstract: Embodiments to enhance recovery of hydrocarbons from a formation by altering wettability at a surface of the formation towards more water-wet are provided. One embodiment comprises providing a formation, providing an aqueous stream for injecting into the formation, adding a reducing agent to the aqueous stream, and injecting the aqueous stream with the reducing agent into the formation to alter a surface charge of the surface of the formation to become more water-wet to enhance recovery of hydrocarbons from the formation. The reducing agent is responsive to characteristics of the formation, characteristics of brine of the formation, and characteristics of hydrocarbons of the formation. The embodiment also comprises injecting a second aqueous stream into the formation after injection of the aqueous stream with the reducing agent. The second aqueous stream comprises surfactant, mobility control agent, the reducing agent, or a combination thereof.
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公开(公告)号：US10711177B2
公开(公告)日：2020-07-14
申请号：US16380735
申请日：2019-04-10
Applicant: Chevron U.S.A. Inc.
Inventor： Adwait Chawathe , Nariman Fathi Najafabadi , Jagannathan Mahadevan
Abstract: Embodiments herein select a brine composition to be injected into a formation to alter wettability at a surface of the formation to enhance recovery of hydrocarbons from the formation. One embodiment comprises providing: a plurality of substrates representative of a formation, a plurality of brine compositions, and a plurality of reducing agents characterized as yielding oxyanions when added to an aqueous stream. The embodiment comprises selecting a brine composition with at least one reducing agent to be injected into the formation to alter wettability at a surface of the formation to enhance recovery of hydrocarbons from the formation and injecting the selected brine composition into the formation to alter wettability at the surface of the formation to enhance recovery of the hydrocarbons from the formation. The brine composition is selected based on interactions between the plurality of substrates, the plurality of brine compositions, and the plurality of reducing agents.
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公开(公告)号：US20160272873A1
公开(公告)日：2016-09-22
申请号：US15073302
申请日：2016-03-17
Applicant: Chevron U.S.A, Inc.
Inventor： Jagannathan Mahadevan , Nariman Fathi Najafabadi , Adwait Chawathe
CPC classification number: C09K8/58
Abstract: Methods and systems are provided to enhance recovery of hydrocarbons from a formation by altering wettability at a surface of the formation towards more water-wet. One method includes: providing a formation; providing an aqueous stream for injecting into the formation; adding a reducing agent to the aqueous stream; and injecting the aqueous stream with the reducing agent into the formation to alter a surface charge of the surface of the formation to become more water-wet to enhance recovery of hydrocarbons from the formation. The reducing agent is responsive to characteristics of the formation, characteristics of brine of the formation, and characteristics of hydrocarbons of the formation. Also provided is a method to select a brine composition to be injected into a formation to alter wettability at a surface of the formation towards more water-wet to enhance recovery of hydrocarbons from the formation.
Abstract translation: 提供了方法和系统，以通过改变地层表面的润湿性来获得更多的水润湿，以增强烃从地层的回收。 一种方法包括：提供地层; 提供用于注入地层的水流; 向所述含水流中加入还原剂; 并将含有还原剂的水流注入地层以改变地层表面的表面电荷，使其变得更加湿润，以增强烃从地层中的回收。 还原剂对地层的特征，地层盐水的特征以及地层烃的特征有反应。 还提供了一种选择要注入到地层中的盐水组合物以改变地层表面的润湿性以获得更多的湿润以增强烃从地层中回收的方法。
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