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公开(公告)号：US20210347977A1
公开(公告)日：2021-11-11
申请号：US17286477
申请日：2019-10-17
Applicant: BASF SE
Inventor： Faissal-Ali EL-TOUFAILI , Dennis LOESCH , Anna-Corina SCHMIDT , Tobias Joachim ZIMMERMANN , Markus OSTERMAYR , Jack F. TINSLEY , Brent BUSBY , Daniel BARRERA-MEDRANO
Abstract: Process of providing polyacrylamides to a site-of-use comprising at least the steps of mixing a polyacrylamide powder at a manufacturing site with an aqueous liquid, thereby obtaining a homogeneous aqueous polyacrylamide concentrate, transporting said concentrate in a transport unit from the manufacturing site to the site-of-use, and removing the homogeneous aqueous concentrate from the transport unit at the site-of-use. Process of treating subterranean, oil and/or gas bearing formations by injecting an aqueous treatment fluid into at least one wellbore, wherein the aqueous treatment fluid is manufactured by mixing at least an aqueous base fluid with said homogeneous aqueous polyacrylamide concentrate at the site-of-use.
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公开(公告)号：US20250154838A1
公开(公告)日：2025-05-15
申请号：US18838637
申请日：2023-02-09
Applicant: BASF SE
Inventor： Daniel BARRERA-MEDRANO , Anna-Corina SCHMIDT , Markus OSTERMAYR , Brent BUSBY , Jack F. TINSLEY
Abstract: A device and a process for making aqueous treatment fluids for recovering crude oil from subterranean, oil-bearing formations, comprising water-soluble polymers, preferably polyacrylamides, by firstly diluting an aqueous polymer concentrate comprising 3.5 to 10 wt. % of water-soluble polymer with an aqueous base fluid to a concentration of 0.01 to 2 wt. % of the water-soluble polymer. And secondly, dosing the diluted aqueous polymer concentrate into a blender or a polymer injection unit to obtain an aqueous treatment fluid. The aqueous treatment fluids obtained may be used as fracturing fluids or as enhance oil recovery fluids, among others. Furthermore, a new aqueous polyacrylamide concentrate—and its preparation process—, which may be used as starting material for making aqueous treatment fluids. The new aqueous polyacrylamide concentrate comprises at least water, polyacrylamide, a salt and a polyol or a surfactant.
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公开(公告)号：US20210148203A1
公开(公告)日：2021-05-20
申请号：US16627473
申请日：2018-07-11
Applicant: BASF SE
Inventor： Christian BITTNER , Guenter OETTER , Jack F. TINSLEY , Hans-Christian RATHS , Marcel Patrik KIENLE , Sebastian Alexander WEISSE
Abstract: The present invention relates to a method for the production of crude oil from subterranean, oil-bearing formations comprising at least the following steps of providing an aqueous surfactant composition comprising water and a surfactant mixture, injecting said surfactant composition into the subterranean, oil-bearing formation through at least one injection well, thereby reducing the crude oil-water interfacial tension to less than 0.1 mN/m, and withdrawing crude oil from the formation through at least one production well, wherein the surfactant mixture comprises at least a surfactant (A) having the general formula R1—O—(CH2CH(R2)O)a—(CH2CH(CH3)O)b—(CH2CH2O)c—R3—Y−M+ (I) and a solubility enhancer (B) having the general formula R4—O—(CH2CH(CH3)O)x—(CH2CH2O)y—R3—Y−M+ (II), wherein R1 to R4, a, b, c, x, y, Y and M have the meaning as defined the the description and claims. The invention further relates to said aqueous surfactant composition and methods for preparing the same as well as the use of solubility enhancer (B) for enhancing the solubility of anionic surfactant (A).
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4.发明申请公开(公告)号：US20200157409A1
公开(公告)日：2020-05-21
申请号：US16627489
申请日：2018-07-11
Applicant: BASF SE
Inventor： Christian BITTNER , Guenter OETTER , Jack F. TINSLEY , Hans-Christian RATHS , Marcel Patrik KIENLE , Sebastian Alexander WEISSE
Abstract: The present invention relates to a method for the production of crude oil from subterranean, oil-bearing formations comprising at least the following steps of providing an aqueous surfactant composition comprising water and a surfactant mixture, injecting said surfactant composition into the subterranean, oil-bearing formation through at least one injection well, thereby reducing the crude oil-water interfacial tension to less than 0.1 mN/m, and withdrawing crude oil from the formation through at least one production well, wherein the surfactant mixture comprises at least a surfactant (A) having the general formula R1—O—(CH2CH(R2)O)a-(CH2CH(CH3)O)b— (CH2CH2O)c—R3—Y− M+ (I) and a solubility enhancer (B) having the general formula R4—O—(CH2CH(CH3)O)x—(CH2CH2O)y—R3—Y− M+ (II), wherein R1 to R4, a, b, c, x, y, Y and M have the meaning as defined the the description and claims. The invention further relates to said aqueous surfactant composition and methods for preparing the same as well as the use of solubility enhancer (B) for enhancing the solubility of anionic surfactant (A).
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