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公开(公告)号：US20190079066A1
公开(公告)日：2019-03-14
申请号：US16128129
申请日：2018-09-11
Applicant: Chevron U.S.A. Inc.
Inventor： Soumyadeep Ghosh , Adwait Chawathe , Sophany Thach
Abstract: A method for predicting phase behavior includes determining a hydrophilic-lipophilic difference based on a ratio of salinity to optimum salinity in the microemulsion system. The method further includes determining a mean solubilization ratio as a direct function of the hydrophilic-lipophilic difference at a same state as an optimum solubilization. The method also includes predicting phase behavior based on the determined mean solubilization ratio. The method additionally includes injecting a surfactant into a reservoir according to the predicted phase behavior.
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Patent Agency Ranking
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：US10208577B2
公开(公告)日：2019-02-19
申请号：US14049877
申请日：2013-10-09
Applicant: Chevron U.S.A. Inc.
Inventor： Hussein Hoteit , Adwait Chawathe
Abstract: A method, system and computer readable medium is presented for use in enhancing oil recovery in a subsurface reservoir comprising. The method, system and computer readable medium defines a plurality of grid levels on a geological model of a subsurface reservoir. Connectivities and transmissibilities are calculated between neighboring cells in the same grid and between connecting cells between different grid levels. Gas and/or fluid dynamics are simulated using dynamic grid refinement where the connectivities and transmissibilities are updated at each time step based on the previously calculated connectivities and transmissibilities.
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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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5.发明申请公开(公告)号：US20190138672A1
公开(公告)日：2019-05-09
申请号：US16124054
申请日：2018-09-06
Applicant: Chevron U.S.A. Inc.
Inventor： Sudipta Sarkar , Adwait Chawathe
Abstract: A system and method for characterizing uncertainty in a subterranean fracture network by obtaining a natural fracture network, obtaining dynamic data, simulating hydraulic fracturing and microseismic events based on the natural fracture network and the dynamic data, generating a stimulated reservoir volume (SRV), and quantifying the uncertainty in the SRV. It may also include narrowing the uncertainty in the SRV through the use of Design of Experiment methods and characterizing the SRV using static and/or dynamic data.
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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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