Title:
METHOD FOR DEEP PROFILE MODIFICATION AND FLOODING OF LOW-PERMEABILITY RESERVOIR
Document Type and Number:
WIPO Patent Application WO/2019/024531
Kind Code:
A1
Abstract:
A method for deep profile modification and flooding of a low-permeability reservoir, comprising: sequentially injecting a soft elastic particle pre-slug, a polymer microsphere main slug, and a soft elastic particle protection slug into an oil layer, the ratio of total injection volumes of the three slugs being 1-2:6-8:1-2. The method provides a solution for profile modification and flooding by combining styrene soft elastic particles and polyacrylamide polymer microspheres, wherein the soft elastic particles can fill oil layer cracks and large pores, and the polymer microspheres can displace remaining oil in the oil layer. The method adopts the combination of different profile modification and flooding system slugs to achieve the purpose of filling cracks and large pores, displacing crude oil, and increasing oil recovery.
Inventors:
WU TIANJIANG (CN)
ZHENG MINGKE (CN)
LI XIANWEN (CN)
YANG HAIEN (CN)
LI XIAORONG (CN)
TANG FAN (CN)
XUE FANGFANG (CN)
CHEN RONGHUAN (CN)
ZHANG RONG (CN)
ZHENG LIJUN (CN)
XU CHUNMEI (CN)
LIU BAOCHE (CN)
YI PING (CN)
ZHU JIAJIE (CN)
BI WEIYU (CN)
ZHENG MINGKE (CN)
LI XIANWEN (CN)
YANG HAIEN (CN)
LI XIAORONG (CN)
TANG FAN (CN)
XUE FANGFANG (CN)
CHEN RONGHUAN (CN)
ZHANG RONG (CN)
ZHENG LIJUN (CN)
XU CHUNMEI (CN)
LIU BAOCHE (CN)
YI PING (CN)
ZHU JIAJIE (CN)
BI WEIYU (CN)
Application Number:
PCT/CN2018/082670
Publication Date:
February 07, 2019
Filing Date:
April 11, 2018
Export Citation:
Assignee:
PETROCHINA CO LTD (CN)
International Classes:
C09K8/588; C08F220/56; C08F220/58; E21B43/22
Foreign References:
| CN107795296A | 2018-03-13 | |||
| CN106988715A | 2017-07-28 | |||
| CN101619119A | 2010-01-06 | |||
| CN102304200A | 2012-01-04 | |||
| CN102603966A | 2012-07-25 | |||
| CN103992433A | 2014-08-20 | |||
| CN102504793A | 2012-06-20 | |||
| CN101619118A | 2010-01-06 | |||
| US3709297A | 1973-01-09 |
Other References:
LIU, YUELONG ET AL.: "Research of Profile Control Agent for Low Permeability Reservoir and Plugging Performance", PETROCHEMICAL INDUSTRY APPLICATION, vol. 37, no. 1, 25 January 2018 (2018-01-25), pages 6 - 10, ISSN: 1673-5285
ZHENG, MINGKE ET AL.: "Polymer Nanospheres Control and Flooding in Low Permeability Oil Fields and Effects", PETROCHEMICAL INDUSTRY APPLICATION, vol. 31, no. 12, 25 December 2012 (2012-12-25), pages 33 - 36, ISSN: 1673-5285
ZHENG, MINGKE ET AL.: "Polymer Nanospheres Control and Flooding in Low Permeability Oil Fields and Effects", PETROCHEMICAL INDUSTRY APPLICATION, vol. 31, no. 12, 25 December 2012 (2012-12-25), pages 33 - 36, ISSN: 1673-5285
Attorney, Agent or Firm:
BEIJING SANYOU INTELLECTUAL PROPERTY AGENCY LTD. (CN)
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