公开(公告)号：US20220033706A1

公开(公告)日：2022-02-03

申请号：US17395933

申请日：2021-08-06

Applicant: Chevron U.S.A. Inc.

Inventor： Do Hoon Kim ,  Dennis Arun Alexis ,  Varadarajan Dwarakanath ,  David Espinosa ,  Taimur Malik ,  Logan Jackson ,  Tom Lynch ,  Ronald Robinson ,  Frances Fournier ,  Hong Yang ,  Sukhjit Aujla

IPC: C09K8/588 ,  C09K8/584 ,  E21B43/20

Abstract: Provided herein are liquid polymer (LP) compositions comprising a synthetic (co)polymer (e.g., an acrylamide (co)polymer), as well as methods for preparing inverted polymer solutions by inverting these LP compositions in an aqueous fluid. The resulting inverted polymer solutions can have a concentration of a synthetic (co)polymer (e.g., an acrylamide (co)polymer) of from 50 to 15,000 ppm, and a filter ratio of 1.5 or less at 15 psi using a 1.2 μm filter. Also provided are methods of using these inverted polymer solutions in oil and gas operations, including enhanced oil recovery.

公开(公告)号：US10677706B2

公开(公告)日：2020-06-09

申请号：US16229616

申请日：2018-12-21

Applicant: Chevron U.S.A. Inc.

Inventor： Douglas K. McCarty ,  Jon E. Burger ,  Lin Li ,  Guo-Qing Tang ,  Marcus O. Wigand ,  Varadarajan Dwarakanath ,  Dyung Tien Vo

IPC: G01N15/08 ,  C09K8/60 ,  E21B49/00 ,  E21B49/08 ,  E21B43/26 ,  C09K8/66 ,  C09K8/68 ,  C09K8/88 ,  G01N33/24

Abstract: A workflow to optimize a fracturing fluid for injection into a subterranean formation is provided. The workflow comprises measurement of fundamental properties and characteristics of reservoir rock and fluid, their interaction with fracturing fluid, computer-based models and laboratory performance testing to select preferred fracturing base fluid and additives package for use in fracturing/re-fracturing stimulation of specific shale formations to enhance hydrocarbon recovery.

公开(公告)号：US10344129B2

公开(公告)日：2019-07-09

申请号：US15835020

申请日：2017-12-07

Applicant: Chevron U.S.A. Inc.

Inventor： Do Hoon Kim ,  Dennis A. Alexis ,  Varadarajan Dwarakanath ,  David R. Espinosa ,  Taimur Malik ,  Peter G. New ,  Adam C. Jackson ,  Christopher Michael Niemi

IPC: C09K8/588 ,  C08J3/00 ,  E21B43/16 ,  E21B43/26

Abstract: Provided herein are liquid polymer (LP) compositions comprising a synthetic (co)polymer (e.g., an acrylamide (co)polymer), as well as methods for preparing aqueous polymer solutions by combining these LP compositions with an aqueous fluid. The resulting aqueous polymer solutions can have a concentration of a synthetic (co)polymer (e.g., an acrylamide (co)polymer) of from 50 to 15,000 ppm, and a filter ratio of 1.5 or less at 15 psi using a 1.2 μm filter. Also provided are methods of using these aqueous polymer solutions in oil and gas operations, including enhanced oil recovery.

公开(公告)号：US10197489B2

公开(公告)日：2019-02-05

申请号：US15222716

申请日：2016-07-28

Applicant: Chevron U.S.A. Inc.

Inventor： Douglas K. McCarty ,  Jon E. Burger ,  Lin Li ,  Guo-Qing Tang ,  Marcus O. Wigand ,  Varadarajan Dwarakanath ,  Dyung Tien Vo

IPC: G01N15/08 ,  C09K8/60 ,  E21B49/00 ,  E21B49/08 ,  E21B43/26 ,  C09K8/66 ,  C09K8/68 ,  C09K8/88 ,  G01N33/24

Abstract: A workflow to optimize a fracturing fluid for injection into a subterranean formation is provided. The workflow comprises measurement of fundamental properties and characteristics of reservoir rock and fluid, their interaction with fracturing fluid, computer-based models and laboratory performance testing to select preferred fracturing base fluid and additives package for use in fracturing/re-fracturing stimulation of specific shale formations to enhance hydrocarbon recovery.

公开(公告)号：US10011757B2

公开(公告)日：2018-07-03

申请号：US15647922

申请日：2017-07-12

Applicant: Chevron U.S.A. Inc.

Inventor： Varadarajan Dwarakanath ,  Robert Matthew Dean ,  Will S. Slaughter ,  Dustin Luke Walker ,  Sophany Thach

IPC: E21B43/16 ,  C09K8/58 ,  C09K8/52 ,  C09K8/03

CPC classification number: C09K8/58 ,  C09K8/032 ,  C09K8/52 ,  E21B43/16

Abstract: Aspects of the invention relate to compositions and methods that are used for the remediation of near-wellbore damage in regions of formations near injection wells in communication with subterranean reservoirs. The damage is caused by previous injection of a polymer emulsion into the injection well. A specific aspect is a method of injecting into the subterranean reservoir a composition containing an olefin sulfonate, a sulfosuccinate, and a chemical selected from an alcohol alkoxylated sulfate, an alcohol alkoxylated carboxylate, or a combination thereof. The polymer emulsion is thereby dissolved, cleaned and/or flushed away from the region near the injection well.

公开(公告)号：US09976072B2

公开(公告)日：2018-05-22

申请号：US14668147

申请日：2015-03-25

Applicant: Chevron U.S.A. Inc.

Inventor： Robert George Shong ,  Varadarajan Dwarakanath ,  Gregory A. Winslow ,  Sophany Thach

IPC: C09K8/584 ,  C07C59/305 ,  E21B43/16 ,  C09K8/588

CPC classification number: C09K8/584 ,  C07C59/305 ,  C09K8/588 ,  E21B43/16

Abstract: The present disclosure generally relates to a multicarboxylate, such as an alkyl alkoxy dicarboxylate a method of making the multicarboxylate, and methods to use the multicarboxylate. A specific embodiment of the disclosure is a compound comprising the chemical formula: R1-R2-R3, wherein R1 comprises a branched or unbranched, saturated or unsaturated, cyclic or non-cyclic, hydrophobic carbon chain having 7-150 carbon atoms; an oxygen atom linking R1 and R2; R2 comprises an alkoxylated chain comprising ethylene oxide, propylene oxide, butylene oxide, or a combination thereof; and R3 comprises a branched or unbranched hydrocarbon chain comprising 2-12 carbon atoms and 2-5 —COOH or —COOM groups wherein M is a monovalent, divalent, or trivalent cation. The composition has a variety of uses but in some embodiments may be used in enhanced oil recovery processes.

公开(公告)号：US20180037794A1

公开(公告)日：2018-02-08

申请号：US15666686

申请日：2017-08-02

Applicant: Chevron U.S.A. Inc.

Inventor： Douglas G. Naae ,  Gregory A. Winslow ,  Varadarajan Dwarakanath ,  Taimur Malik ,  Gayani Pinnawala Arachchilage

IPC: C09K8/20 ,  C09K8/60

CPC classification number: C09K8/20 ,  C08G65/2606 ,  C08G65/2612 ,  C08K5/057 ,  C09K8/524 ,  C09K8/584 ,  C09K8/604

Abstract: Provided herein are novel surfactant compositions and methods having application in a variety of fields including enhanced oil recovery, the cleaning industry as well as groundwater remediation. The surfactant compositions are based on lignin bio-oil with a phenol hydroxyl group as the main functional group. The compositions include carboxylic surfactant s and mixed hydrophilic and hydrophobic surfactant structures, which can be used for the recovery of crude oil compositions from challenging reservoirs.

公开(公告)号：US20180031462A1

公开(公告)日：2018-02-01

申请号：US15661914

申请日：2017-07-27

Applicant: Chevron U.S.A. Inc.

Inventor： Varadarajan Dwarakanath ,  Dustin L. Walker ,  David R. Espinosa ,  Dennis A. Alexis ,  Harold C. Linnemeyer ,  Marlon Solano

IPC: G01N11/00 ,  E21B43/16 ,  E21B43/26 ,  E21B47/00

CPC classification number: G01N11/00 ,  B01D2101/04 ,  E21B43/16 ,  E21B43/26 ,  E21B47/00 ,  G01L13/00 ,  G01N2011/006

Abstract: Provided herein are portable apparatus as well as methods of analyzing an injection fluid using these portable apparatus. In some embodiments, the injection fluid can contain a polymer, but a polymer is not necessary. For example, the portable apparatus and methods may be used to determine viscosity, long term injectivity, filter ratio, or any combination thereof of the injection fluid.

公开(公告)号：US20170158948A1

公开(公告)日：2017-06-08

申请号：US15372170

申请日：2016-12-07

Applicant: Chevron U.S.A. Inc.

Inventor： Do Hoon Kim ,  Dennis Arun Alexis ,  Varadarajan Dwarakanath ,  David Espinosa ,  Taimur Malik ,  Logan Jackson ,  Tom Lynch ,  Ronald Robinson ,  Frances Fournier ,  Hong Yang ,  Sukhjit Aujla

IPC: C09K8/588 ,  E21B43/26 ,  C09K8/88 ,  C09K8/584 ,  C09K8/68

CPC classification number: C09K8/588 ,  C09K8/584 ,  C09K8/68 ,  C09K8/882 ,  C09K2208/28 ,  E21B43/20 ,  E21B43/26

Abstract: Provided herein are liquid polymer (LP) compositions comprising a synthetic (co)polymer (e.g., an acrylamide (co)polymer), as well as methods for preparing inverted polymer solutions by inverting these LP compositions in an aqueous fluid. The resulting inverted polymer solutions can have a concentration of a synthetic (co)polymer (e.g., an acrylamide (co)polymer) of from 50 to 15,000 ppm, and a filter ratio of 1.5 or less at 15 psi using a 1.2 μm filter. Also provided are methods of using these inverted polymer solutions in oil and gas operations, including enhanced oil recovery.

公开(公告)号：US20150203740A1

公开(公告)日：2015-07-23

申请号：US14673425

申请日：2015-03-30

Applicant: Chevron U.S.A. Inc.

Inventor： Robert Shong ,  Varadarajan Dwarakanath ,  Sophany Thach ,  Gregory Winslow

IPC: C09K8/58 ,  E21B43/16

CPC classification number: C09K8/584 ,  C07C29/60 ,  C09K8/58 ,  C09K8/588 ,  E21B43/16

Abstract: In an embodiment of the disclosure, mixtures of different carbon length alcohols are used as the primary feedstock for Guerbet alcohols. Specifically, embodiments relate to a method of synthesizing mixed molecular weight additives from a mixture of primary alcohols comprising, receiving a mixture of primary alcohols comprising at least two different chain length primary alcohols and reacting the mixture of primary alcohols to produce a mixture of Guerbet alcohols. The mixture of Guerbet alcohols is then used to produce an additive composition comprising additives of different molecular weights.

Abstract translation: 在本公开的一个实施方案中，使用不同碳长度的醇的混合物作为Guerbet醇的主要原料。 具体地，实施方案涉及从伯醇的混合物合成混合的分子量添加剂的方法，包括：接收包含至少两种不同的链长伯醇的伯醇的混合物，并使伯醇的混合物反应以产生格尔伯特醇的混合物 。 然后将Guerbet醇的混合物用于制备包含不同分子量的添加剂的添加剂组合物。