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    ALPHA-OLEFIN SULFONIC DIMER ACID PROCESS
    1.
    发明申请
    ALPHA-OLEFIN SULFONIC DIMER ACID PROCESS 审中-公开

    公开(公告)号：WO2017023664A1

    公开(公告)日：2017-02-09

    申请号：PCT/US2016/044375

    申请日：2016-07-28

    Applicant: STEPAN COMPANY

    Inventor： DADO, Gregory P. ,  SANDERS, Aaron ,  DONG, Xue Min ,  ROJAS, Carolina E.

    IPC: C07C303/06 ,  C07C309/20 ,  C07G99/00

    CPC classification number: C07C303/06 ,  C07C309/20

    Abstract: Methods of making an alpha-olefin sulfonic dimer acid (AOS dimer acid) are disclosed. In one method, an alpha-olefin is sulfonated, preferably with sulfur trioxide, to produce a mixture comprising an alpha-olefin sulfonic acid (AOS acid) and sulfur dioxide. This mixture is then heated while purging sulfur dioxide and hydrogen sulfide from the reactor to produce an AOS dimer acid composition. In another method, the AOS acid mixture is treated to remove sulfur dioxide and is then heated to produce an AOS dimer acid composition. With either method, the resulting AOS dimer acid composition has at least a 30% decrease in the level of elemental sulfur when compared with that of an AOS dimer acid composition prepared by a similar process in the absence of any active removal of sulfur dioxide or hydrogen sulfide. AOS dimer acid compositions and salts of the AOS dimer acids, which are useful surfactants for oilfield and other applications, are also disclosed.

    Abstract translation: 公开了制备α-烯烃磺酸二聚酸（AOS二聚酸）的方法。 在一种方法中，α-烯烃被磺化，优选用三氧化硫磺酸，以产生包含α-烯烃磺酸（AOS酸）和二氧化硫的混合物。 然后将该混合物从反应器中吹扫二氧化硫和硫化氢以产生AOS二聚酸组合物。 在另一种方法中，处理AOS酸混合物以除去二氧化硫，然后加热以产生AOS二聚酸组合物。 使用任一种方法，与不存在任何有效除去二氧化硫或氢气的类似方法制备的AOS二聚酸组合物相比，所得到的AOS二聚酸组合物的元素硫含量降低至少30％ 硫化物。 还公开了AOS二聚酸组合物和AOS二聚酸的盐，其是用于油田和其它应用的有用的表面活性剂。

    METHOD FOR BOOSTING VISCOSITY OF A FRACTURING FLUID
    2.
    发明申请
    METHOD FOR BOOSTING VISCOSITY OF A FRACTURING FLUID 审中-公开

    公开(公告)号：WO2022026090A1

    公开(公告)日：2022-02-03

    申请号：PCT/US2021/038862

    申请日：2021-06-24

    Applicant: STEPAN COMPANY

    Inventor： PHATAK, Alhad ,  REN, Ginger ,  SEYMOUR-LOYA, Brian ,  SANDERS, Aaron

    IPC: C09K8/68 ,  E21B43/26 ,  C10M157/04

    Abstract: A hydraulic fracturing method is disclosed. A small proportion of a nonionic surfactant is used in combination with an acrylamide polymer emulsion friction reducer, the proppant, and the base water to boost the viscosity of the fracturing fluid. The nonionic surfactant has a calculated HLB within the range of 10 to 17. The nonionic surfactants include selected aralkylated phenol ethoxylates, amine or amidoamine ethoxylates, mixed EO/PO alcohol alkoxylates, ethoxylated alcohols, ethoxylated amides, and alkylphenol ethoxylates. The nonionic surfactant boosts the viscosity of the fracturing fluid, promotes proppant transfer, and enables more-efficient hydrocarbon production.

    FRICTION REDUCER FOR HYDRAULIC FRACTURING
    3.
    发明申请
    FRICTION REDUCER FOR HYDRAULIC FRACTURING 审中-公开

    公开(公告)号：WO2019046198A1

    公开(公告)日：2019-03-07

    申请号：PCT/US2018/048160

    申请日：2018-08-27

    Applicant: STEPAN COMPANY

    Inventor： SEYMOUR-LOYA, Brian ,  SANDERS, Aaron ,  FRIESEN, Dawn ,  DADO, Gregory, P.

    IPC: C09K8/035 ,  C09K8/68 ,  C10M107/40

    Abstract: Compositions comprising an acrylamide polymer emulsion and a nonionic surfactant suitable for use as friction reducers for hydraulic fracturing are disclosed. The nonionic surfactants include aralkylated phenol ethoxylates, amine ethoxylates, amidoamine ethoxylates, linear or branched alcohol EO/PO alkoxylates, ethoxylated alcohols, alkylphenol ethoxylates, and EO-capped poly(oxypropylene) block copolymers. Improved hydraulic fracturing processes in which an acrylamide polymer emulsion is used as a friction reducer are also described. In these processes, the surfactant is included in the composition with the acrylamide polymer friction reducer, or it is introduced separately into the process. The performance of low-cost polyacrylamide friction reducers can be boosted with a small proportion of certain readily available nonionic surfactants. The inventive compositions are effective in high-salinity environments, and their performance can sometimes exceed that of more-expensive salt-tolerant friction reducers, thereby reducing fresh water demand and enabling greater utilization of produced water.

    DEMULSIFYING METHOD FOR DRILLING FLUIDS
    5.
    发明申请
    DEMULSIFYING METHOD FOR DRILLING FLUIDS 审中-公开

    公开(公告)号：WO2020005390A1

    公开(公告)日：2020-01-02

    申请号：PCT/US2019/031038

    申请日：2019-05-07

    Applicant: STEPAN COMPANY

    Inventor： REN, Ginger ,  SANDERS, Aaron

    IPC: E21B21/06

    Abstract: A method for demulsifying a recovered drilling fluid is disclosed. A recovered drilling fluid is first combined with dilution water and a diethanolamine-based C 8 -C 18 alkanolamide demulsifying agent. The recovered drilling fluid comprises hydrocarbons, a brine having at least 25% total dissolved solids, an emulsifier, and undissolved oil- wetted solids. In a second step, the mixture is separated, or is allowed to separate, into three distinct phases, including a clear oil phase comprising the hydrocarbons, a clear brine phase, and a water-wetted solid phase. Compositions suitable for use as demulsifiers and demulsified compositions are also disclosed. The alkanolamide demulsifying agents enable rapid, clean separation of phases and efficient recovery of 80% or more of the oil phase from the recovered drilling fluid.

    MIXED DIMERS FROM ALPHA-OLEFIN SULFONIC ACIDS
    6.
    发明申请
    MIXED DIMERS FROM ALPHA-OLEFIN SULFONIC ACIDS 审中-公开
    来自ALPHA-OLEFIN SULFONIC ACIDS的混合二聚体

    公开(公告)号：WO2017023665A1

    公开(公告)日：2017-02-09

    申请号：PCT/US2016/044378

    申请日：2016-07-28

    Applicant: STEPAN COMPANY

    Inventor： ROJAS, Carolina E. ,  DONG, Xue Min ,  SANDERS, Aaron ,  DADO, Gregory P.

    IPC: C09K8/592 ,  E21B43/24

    CPC classification number: C09K8/592 ,  C11D1/143 ,  C11D1/22

    Abstract: Mixed dimer and mixed oligomer compositions are disclosed. The mixed dimer compositions comprise a monosulfonated cross-dimer or a salt thereof. The monosulfonated cross-dimer is a reaction product of (a) an alpha-olefin sulfonic acid (AOS acid); and (b) an unsulfonated olefin, an unsulfonated olefin precursor, or a functionalized olefin. The mixed oligomer compositions comprise a mono- or polysulfonated cross-oligomer or a salt thereof. The mono- or polysulfonated cross-oligomer is a reaction product of (a) an AOS acid; and (b) an unsulfonated diolefin or an unsulfonated diolefin precursor. Various methods for making the mixed dimer or oligomer compositions are described. Salts of the mixed dimer and oligomer compositions are useful surfactants for foams used in oilfield and other applications. The foams have improved high-temperature stability when compared with foams from AOS dimer acid salts.

    Abstract translation: 公开了混合的二聚体和混合的低聚物组合物。 混合的二聚体组合物包含单磺化的交叉二聚体或其盐。 单磺酰交联二聚物是（a）α-烯烃磺酸（AOS酸）的反应产物; 和（b）未磺化的烯烃，未磺化的烯烃前体或官能化的烯烃。 混合的低聚物组合物包含单磺化或多磺化的交叉低聚物或其盐。 单或多磺化交联低聚物是（a）AOS酸的反应产物; 和（b）未磺化的二烯烃或未磺化的二烯烃前体。 描述了制备混合的二聚体或低聚物组合物的各种方法。 混合的二聚物和低聚物组合物的盐是用于油田和其它应用中的泡沫的有用的表面活性剂。 与AOS二聚酸盐的泡沫相比，泡沫具有改善的高温稳定性。

    STEAM FOAM METHODS FOR STEAM-ASSISTED GRAVITY DRAINAGE
    7.
    发明申请
    STEAM FOAM METHODS FOR STEAM-ASSISTED GRAVITY DRAINAGE 审中-公开
    用于蒸汽辅助排放的蒸汽泡沫方法

    公开(公告)号：WO2016028464A1

    公开(公告)日：2016-02-25

    申请号：PCT/US2015/043051

    申请日：2015-07-31

    Applicant: STEPAN COMPANY

    Inventor： SANDERS, Aaron ,  DADO, Gregory, P. ,  HOLLAND, Brian ,  DONG, Xue, Min ,  ROJAS, E., Carolina

    IPC: E21B43/24

    CPC classification number: E21B43/2408

    Abstract: Methods for making efficient use of steam in a steam-assisted gravity drainage (SAGD) process for recovering heavy oils from tar sands and similar petroleum deposits are disclosed. The methods utilize a surfactant to generate steam foam in ways that maximize efficient use of steam. In some aspects, steam foam is used in water layers or gas caps that reside above steam chambers 4 to prevent loss of steam 6 from the steam chamber 4. The predominant use of relatively dry steam in SAGD processes makes it challenging to find ways to introduce surfactants 5 and generate steam foam 8. However, decreasing the mobility of the steam 6 by converting at least some of it to foam 8 allows the wellbore and steam chambers 4 above the injection site to be more fully developed, provides for more effective heat transfer to the heavy oil and rock, improves production, and allows recovery of the heavy oil with a minimum amount of steam usage.

    Abstract translation: 公开了在用于从焦油砂和类似的石油沉积物中回收重油的蒸汽辅助重力排水（SAGD）方法中有效利用蒸汽的方法。 该方法利用表面活性剂产生蒸汽泡沫，以最大限度地有效利用蒸汽。 在一些方面，蒸气泡沫被用在位于蒸汽室4上方的水层或气帽中，以防止蒸汽室6蒸汽6的损失。在SAGD工艺中主要使用相对干燥的蒸汽使得探索如何引入 表面活性剂5并产生蒸汽泡沫8.然而，通过将其中的至少一些转化为泡沫8来降低蒸汽6的迁移率，允许更充分地开发注射部位上方的井筒和蒸汽室4，从而提供更有效的热传递 对重油和岩石，改善生产，并允许以最少量的蒸汽使用回收重油。

    ALPHA-OLEFIN SULFONIC DIMER ACID PROCESS
    9.
    发明公开
    ALPHA-OLEFIN SULFONIC DIMER ACID PROCESS 审中-公开

    公开(公告)号：EP3331854A1

    公开(公告)日：2018-06-13

    申请号：EP16748436.9

    申请日：2016-07-28

    Applicant: Stepan Company

    Inventor： DADO, Gregory P. ,  SANDERS, Aaron ,  DONG, Xue Min ,  ROJAS, Carolina E.

    IPC: C07C303/06 ,  C07C309/20 ,  C07G99/00

    CPC classification number: C07C303/06 ,  C07C303/22 ,  C07C309/05 ,  C07C309/62 ,  C07G17/004 ,  C09K8/02 ,  C09K8/94 ,  C07C309/20 ,  C07C309/04

    Abstract: Methods of making an alpha-olefin sulfonic dimer acid (AOS dimer acid) are disclosed. In one method, an alpha-olefin is sulfonated, preferably with sulfur trioxide, to produce a mixture comprising an alpha-olefin sulfonic acid (AOS acid) and sulfur dioxide. This mixture is then heated while purging sulfur dioxide and hydrogen sulfide from the reactor to produce an AOS dimer acid composition. In another method, the AOS acid mixture is treated to remove sulfur dioxide and is then heated to produce an AOS dimer acid composition. With either method, the resulting AOS dimer acid composition has at least a 30% decrease in the level of elemental sulfur when compared with that of an AOS dimer acid composition prepared by a similar process in the absence of any active removal of sulfur dioxide or hydrogen sulfide. AOS dimer acid compositions and salts of the AOS dimer acids, which are useful surfactants for oilfield and other applications, are also disclosed.

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