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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：US11047213B2
公开(公告)日：2021-06-29
申请号：US14832826
申请日：2015-08-21
Applicant: Chevron U.S.A. Inc.
Inventor： Morteza Sayarpour , Nariman Fathi Najafabadi , Lokendra Jain
IPC: E21B41/00 , E21B43/20 , E21B47/003 , E21B43/14 , E21B43/16 , E21B47/00 , G01N27/22 , E21B49/00 , G01V99/00
Abstract: Described herein are various embodiments of computer-implemented methods, computing systems, and program products for analyzing a flood operation on a hydrocarbon reservoir. For example, an embodiment of a computer implemented method of analyzing at least a first flood operation and a second flood operation. The embodiment includes, for each flood operation: receiving production data and injection data, running capacitance resistance modeling, using the generated response times, the generated interwell connectivities, the received production data, the received injection data, or any combination thereof to generate a proxy of pore volume swept per well pair, and aggregating the generated proxies to generate an estimate of pore volume swept at a well level, at a reservoir level, or both for the flood operation. The embodiment also includes comparing the generated estimate of pore volume swept to determine a change in sweep efficiency at the well level, at the reservoir level, or both.
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Patent Agency Ranking
公开(公告)号：US20160177690A1
公开(公告)日：2016-06-23
申请号：US14832826
申请日：2015-08-21
Applicant: Chevron U.S.A. Inc.
Inventor： Morteza Sayarpour , Nariman Fathi Najafabadi , Lokendra Jain
CPC classification number: E21B41/0092 , E21B43/14 , E21B43/16 , E21B43/20 , E21B47/00 , E21B47/0003 , E21B49/00 , G01N27/22 , G01V99/005
Abstract: Described herein are various embodiments of computer-implemented methods, computing systems, and program products for analyzing a flood operation on a hydrocarbon reservoir. For example, an embodiment of a computer implemented method of analyzing at least a first flood operation and a second flood operation. The embodiment includes, for each flood operation: receiving production data and injection data, running capacitance resistance modeling, using the generated response times, the generated interwell connectivities, the received production data, the received injection data, or any combination thereof to generate a proxy of pore volume swept per well pair, and aggregating the generated proxies to generate an estimate of pore volume swept at a well level, at a reservoir level, or both for the flood operation. The embodiment also includes comparing the generated estimate of pore volume swept to determine a change in sweep efficiency at the well level, at the reservoir level, or both.
Abstract translation: 这里描述了用于分析油气藏的洪水操作的计算机实现的方法，计算系统和程序产品的各种实施例。 例如，分析至少第一洪水操作和第二洪水操作的计算机实现方法的实施例。 该实施例包括：对于每个洪水操作：接收生产数据和喷射数据，运行电容电阻建模，使用产生的响应时间，产生的井间连接性，接收的生产数据，接收的喷射数据或其任何组合以生成代理 的孔体积扫描每孔对，并聚集生成的代理，以产生在井水平，储层水平或两者用于洪水操作扫过的孔体积的估计。 该实施例还包括比较所产生的细孔体积估计值，以确定井水平，储层水平或两者的扫掠效率的变化。
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公开(公告)号：US10196555B2
公开(公告)日：2019-02-05
申请号：US14885735
申请日：2015-10-16
Applicant: Chevron U.S.A. Inc.
Inventor： Nariman Fathi Najafabadi
Abstract: A preconditioning fluid is provided for producing crude oil from a subterranean formation. The preconditioning fluid produces an interface with crude oil in the formation that is more elastic than the interface between formation brine and the crude oil and has a favorable Amott-Harvey wettability index for oil recovery under the dominant hydrocarbon recovery mechanisms. The more elastic interface and improved Amott-Harvey wettability index is consistent with higher recoveries of crude oil from the formation.
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公开(公告)号：US20160024372A1
公开(公告)日：2016-01-28
申请号：US14885735
申请日：2015-10-16
Applicant: Chevron U.S.A. Inc.
Inventor： Nariman Fathi Najafabadi
CPC classification number: C09K8/58 , C09K8/66 , E21B43/26 , E21B49/087 , G06F19/704
Abstract: A preconditioning fluid is provided for producing crude oil from a subterranean formation. The preconditioning fluid produces an interface with crude oil in the formation that is more elastic than the interface between formation brine and the crude oil and has a favorable Amott-Harvey wettability index for oil recovery under the dominant hydrocarbon recovery mechanisms. The more elastic interface and improved Amott-Harvey wettability index is consistent with higher recoveries of crude oil from the formation.
Abstract translation: 提供预处理流体用于从地下地层中生产原油。 预处理流体在地层中产生与地层盐水和原油之间的界面更具弹性的界面，并且在主要烃回收机理下具有良好的用于油回收的Amott-Harvey润湿指数。 更具弹性的界面和改进的Amott-Harvey润湿指数与来自地层的原油的较高回收率一致。
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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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