公开(公告)号：WO2023059526A1

公开(公告)日：2023-04-13

申请号：PCT/US2022/045483

申请日：2022-10-03

Applicant: CHEVRON U.S.A. INC.

Inventor： YAO, Aifeng ,  YAN, Xiaoyan

IPC: D07B1/00 ,  E21B43/0107 ,  E21B43/017

Abstract: A method for evaluating a securing system for a floating structure, where the method includes collecting a plurality of metocean data from a plurality of metocean sensor devices during a current time period coinciding with a field operation, where the field operation is conducted from the floating structure that is stabilized by the securing system. The method can also include evaluating the metocean data using a plurality of algorithms. The method can further include determining, based on evaluating the metocean data, a condition of the securing system at the current time period.

公开(公告)号：WO2023018487A1

公开(公告)日：2023-02-16

申请号：PCT/US2022/035360

申请日：2022-06-28

Applicant: CHEVRON U.S.A. INC.

Inventor： BRAIT, Axel ,  OUYANG, Xiaoying ,  KUPERMAN, Alexander ,  MAESEN, Theodorus, Ludovicus Michael

IPC: B01J23/755 ,  B01J35/00 ,  C01B3/38 ,  B01J23/00

Abstract: A layered catalyst reactor system and process for hydrotreatment of hydrocarbon feedstocks. The layered catalyst system reactors comprise vertical bed layers including a demetallization catalyst layer, multiple layers of supported hydrotreating catalyst layer, and multiple alternating layers of supported hydrocracking catalysts and self-supported hydrotreating catalysts. The arrangement of the catalyst layers mitigates the risk of temperature run-aways, with improvements in hydrotreatment performance.

公开(公告)号：WO2023014779A1

公开(公告)日：2023-02-09

申请号：PCT/US2022/039262

申请日：2022-08-03

Applicant: CHEVRON U.S.A. INC.

Inventor： FEI, Weihong ,  HU, Chaoshun ,  GIVEN, Paige, Rene ,  HENNENFENT, Gilles ,  HOELTING, Cory

IPC: G01V99/00

Abstract: Systems and methods for estimating reservoir productivity as a function of position in a subsurface volume of interest are disclosed. Exemplary implementations may: obtain an initial depth uncertainty model; obtain training depth uncertainty parameter values from the non-transient storage medium; obtain corresponding training depth uncertainty values; generate a trained depth uncertainty model by training the initial depth uncertainty model using the training depth uncertainty parameter values and the corresponding training depth uncertainty values; and store the trained depth uncertainty model.

公开(公告)号：WO2022245688A1

公开(公告)日：2022-11-24

申请号：PCT/US2022/029364

申请日：2022-05-16

Applicant: CHEVRON U.S.A. INC.

Inventor： HOMMELTOFT, Sven Ivar

IPC: C08F4/659 ,  C08F110/06 ,  C07C2/34

Abstract: A method for making a propylene oligomer having a high vinylidene content and a high degree of structural regularity and the propylene oligomer made therefrom. The method of making the propylene oligomer comprises contacting an unbridged metallocene complex with a propylene composition in the presence of a modified methyl aluminum oxide activator compound under suitable oligomerization conditions. The use of the combination of a modified methyl aluminum oxide activator compound with an unbridged metallocene complex has been found to provide increased vinylidene group content and reduced hydrogenated propylene oligomer content.

公开(公告)号：WO2022204073A1

公开(公告)日：2022-09-29

申请号：PCT/US2022/021229

申请日：2022-03-22

Applicant: CHEVRON U.S.A. INC.

Inventor： CHABOT, Julie ,  MCMULLIN, Michael, Shawn ,  KOU, Bo ,  AVECILLA, Audrey, Lane

IPC: C10G65/00 ,  B01J27/19 ,  B01J35/02

Abstract: Embodiments of the disclosure include processes for hydroconversion of hydrocarbon feedstocks in ebullated bed reactor systems. In particular, the systems comprise two or more ebullated bed reactors comprising catalyst particles, one or more inter-stage separation vessels, which are in fluid communication, and allow for the introduction of an additional solvent into the system between the final inter-stage separation vessel and the final ebullated bed reactor in the flow path. The processes include the addition of a solvent comprising water to an inter-stage liquid product prior to contact with the final ebullated bed reactor, which improves catalytic performance.

公开(公告)号：WO2022174034A1

公开(公告)日：2022-08-18

申请号：PCT/US2022/016118

申请日：2022-02-11

Applicant: CHEVRON U.S.A. INC.

Inventor： KARA, Mustafa Can

IPC: E21B49/08 ,  G06N20/00 ,  G06F17/18

Abstract: An unsupervised machine-learning model is trained using historical operation characteristics of a well. Operation characteristics of the well for a duration of time is reconstructed by the unsupervised machine-learning model. Whether a sanding event will occur in the future at the well is predicted based on the difference between the operation characteristics of the well and the reconstructed operation characteristics of the well.

公开(公告)号：WO2022162627A1

公开(公告)日：2022-08-04

申请号：PCT/IB2022/050800

申请日：2022-01-31

Applicant: CHEVRON U.S.A. INC.

Inventor： THORNE, Julian A.

IPC: G06N5/00 ,  G06N20/20 ,  G01V99/00

Abstract: A method is described for data analytics including receiving a set of M variables representative of a subsurface volume of interest, derived from one or more of co-located well-log data, seismic data, and production data; performing a global optimum branch-and-bound algorithm to find a collection of N variables from the set of M variables that achieve the best fit in multiple regression; adding random variables to the collection of N variables; a slightly non-linear optimization until a statistically significant percentage of the random variables are eliminated; and performing, a highly non-linear optimization to select a final set of features. The method may be executed by a computer system.

公开(公告)号：WO2022159360A1

公开(公告)日：2022-07-28

申请号：PCT/US2022/012705

申请日：2022-01-18

Applicant: CHEVRON U.S.A. INC.

Inventor： ZHANG, Yihua ,  LEI, Guan-Dao

IPC: C10G65/04 ,  C10G45/60 ,  B01J29/74 ,  C10G45/06 ,  C10G45/52 ,  B01J23/40

Abstract: Described are processes to produce base oils with one more improved properties, e.g., lower aromatics, economically and/or efficiently. In some embodiments the processes comprise a step that reduces the amount of residual refractory sulfur compounds prior to or simultaneous with a hydrofinishing step which advantageously provides base oils with lower aromatics than comparable processes.

公开(公告)号：WO2022159359A1

公开(公告)日：2022-07-28

申请号：PCT/US2022/012702

申请日：2022-01-18

Applicant: CHEVRON U.S.A. INC.

Inventor： ZHANG, Yihua ,  BHATTACHARYA, Subhasis ,  LEI, Guan-Dao

IPC: C10G65/04 ,  C10G45/64 ,  C10G45/62 ,  C10G45/44 ,  C10G45/52 ,  B01J29/74 ,  B01J23/40

Abstract: Described are processes to produce base oils with one more improved properties, e.g., lower aromatics, economically and/or efficiently. In some embodiments, the processes relate to two stage (or more) hydrofinishing which advantageously provides base oils with lower aromatics than comparable one stage processes.

公开(公告)号：WO2022150101A1

公开(公告)日：2022-07-14

申请号：PCT/US2021/059653

申请日：2021-11-17

Applicant: CHEVRON U.S.A. INC.

Inventor： GIRGIS, Michael ,  ZONES, Stacey, Ian

IPC: C10G45/62 ,  C10G45/64

Abstract: Embodiments of the disclosure include processes for selective ring-opening of cycloparaffins in hydrocarbon feeds to produce hydrocracked cycloparaffins. In particular, the process comprises contacting a hydrocarbon feed comprising cycloparaffins with hydrogen and a catalyst comprising an unsulfided, low -acidity, metal-containing zeolite under hydrocracking conditions; wherein the metal is selected from the group consisting of platinum, nickel, rhodium and mixtures thereof. The processes are useful for upgrading petroleum streams to lubricant base stocks.