低渗透油层新型降阻剂降压增注技术.pdf

2014年6月
大庆石油地质与开发
June. 2014
第33卷第3期
Petroleum Geology and Oilfield Development in Daqing
Vol 33 No. 3
DOI:10.3969/J.ISSN.1000-3754.2014.03.023
低渗透油层新型降阻剂降压增注技术
刘伟杰
(大庆油田有限责任公司第一采油厂,黑龙江.大庆163001)
摘要;受储层物性及开发方式影响,低渗透油在注水开发过程中存在压力传递慢、注人压力高、油井产量下
降快等问题。目前主要通过酸化等方式降压增注,存在有效期短和对套管损害等缺点。通过开展室内实验,对
新型降阻剂进行了筛选,并从润湿性、吸附、黏土膨胀、自发渗吸、阻垢率、抑制细菌、相对渗透性等方面进
行了评价。室内实验结果表明,新型降阻剂具有较好的界面张力,很强的抗吸附能力及抑制阳离子交换能力,
防膨和黏土稳定性好。矿场试验证明,新型降阻剂注入效果明显,有效地改善了吸水状况,试验井组注入压力
下降,注入量增加,对应油井的产量提高,井区地层能量得到恢复。
关键词:储层;低渗透油疲;降阻剂;先导性试验;地层能量
中图分类号:TFE348
文献标识码:A
文章编号:10003754(2014)03-0109-05
PRESSURE-DECREASING AND INJECTION INCREASING TECHNIQUE
OF NEW ANIPRCTION AGENT FOR LOW-
PERMEABILITY OIL RESERVOIRS
LIU Weijie
No I Oil Production Plant of Daging Oilfield Company Ltd, Daging 163001, China
Abstract Due to influences of the physical properties and development modes of the reservoirs, there are the fol
lowing problems such as lower pressure transmission, higher injection pressure, faster production decline, etc. for
the low-permeability oil reservoirs in the process of water flooding development. At present, the main pressure-d
creasing and injection-increasing measures are acidizing and so on, while some disadvantages of shorter period of
validity, casing damage and so forth are followed. Through the conducted indoor experiments, a new type of anti-
friction agent is screened and evaluated from the aspects of wettability, adsorption, clay swelling, spontaneous im
bibition, scale inhibition rate, bacteria restraint and relative permeability. The experimental results show that the
new agent is characterized by much better interfacial tension (IFT), stronger anti-absorption capacity and power to
restrain anion exchange and moreover the much better swelling-proof and clay-stabilizing abilities. The field test
proves that the injection effects of the new agent are obvious, thus the water intaken performances are effectively
improved for the testing well group, the injection pressures are all decreased and the injection rates are increased
as well for the corresponding oil producers, the oil productions are increased and furthermore the formation energy
收稿日期:2013-07-10改回日期:2013-09-25
基金项目:国家自然科学基金(10672187)和中国石油天然气股份公司重点科技攻关项目(06-02A-02-01)。
作者简介:刘伟杰,女,1969年生,工程师,主要从事三次采油动态开发工作。
E-mail:niceqinger(@sina.com