公开(公告)号：US20180328155A1

公开(公告)日：2018-11-15

申请号：US15955125

申请日：2018-04-17

Applicant: CONOCOPHILLIPS COMPANY

Inventor： Siluni L. GAMAGE ,  T. J. WHEELER ,  Robert S. REDMAN

IPC: E21B43/24

Abstract: A method starts wells with electrical downhole heating and injects solvent(s) or NGL mixes as a preconditioning for a steam injection process. The downhole electrical heating and solvent injection recovers oil and reduces the reservoir pressure. Once oil has been recovered for a period of time and the operating pressure and temperature has been reduced, steam or steam and solvent(s) may be injected to produce high oil recoveries at faster production rates than downhole heating or downhole heating and solvent(s) injection alone. The method reduces heat losses due to steam injection at lower pressure and temperature and therefore, improves efficiency and lowers operating costs. Operating at lower pressure and temperature also reduces the risk of melting the permafrost and consequent well failure issues.

公开(公告)号：US20150198012A1

公开(公告)日：2015-07-16

申请号：US14557709

申请日：2014-12-02

Applicant: CONOCOPHILLIPS COMPANY

Inventor： James A. MILLS ,  Robert S. REDMAN ,  David L. LEE

IPC: E21B36/00 ,  E21B33/14 ,  E21B43/10 ,  E21B17/00

CPC classification number: E21B36/003 ,  E21B43/2406

Abstract: The present invention discloses a method and system for insulating wells wherever heat transfer is a problem, the method comprising using dual concentric vacuum insulated tubing layers, preferably with the joints staggered with respect to one another. The method can be combined with other insulating methods, and well as with other subsidence mitigation techniques.

Abstract translation: 本发明公开了一种用于绝热井的方法和系统，无论何时传热是有问题的，该方法包括使用双重同心真空绝热管层，优选地相对于彼此交错的接头。 该方法可以与其他绝缘方法相结合，以及其他沉降减轻技术。