小井距与聚合物驱相结合提高边际油藏采收率

特种油气藏 Pub Date : 2006-01-01 DOI:10.2118/96946-MS

Jingmei Wang, Demin Wang, X. Sui, H. Zeng, W. Bai

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引用次数: 8

摘要

一些陆相非均质砂岩油田水驱采收率很低，特别是油藏连续性差、不同层间渗透率高低差异大的情况下。由于增产的可采油量不足以经济地进一步打井，提出了打井和聚合物驱同时进行的方案，并进行了中试。本文介绍了聚合物注入参数的选择和方案优化的实验室研究。在井距为100 m时，将厚度小于1m、渗透率为5 ~ 100 md的储层组合在一起进行开发。实验室研究和试验结果都表明，采收率提高了10%以上，特别是在对聚合物注入器采用分段注入措施后。中试结果表明，该技术在经济上是可行的。

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Combining small well spacing with polymer flooding to improve oil recovery of marginal reservoirs

The recovery factor of water flooding is very low in some continental and heterogeneous sandstone oil fields,especially when the reservoir continuity is poor,permeability low and high permeability variation between different zones.Because the amount of incremental producible oil is not large enough to further drill infill wells economically,drilling infill wells and performing polymer flooding simultaneously was proposed and a pilot test has been conducted.This paper introduces the laboratory studies on selection of polymer injection parameters and project design optimization.Under well spacing of 100 m,the zones with a thickness of less than 1m and with a permeability range of 5 to 100 md were combined together and put on development.Both lab studies and pilot results show that the recovery factor has over 10% increase,especially after applying separate zone injection measures in polymer injectors.The pilot test indicates that the technique of combining infill wells with polymer flooding is economically feasible.

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来源期刊

特种油气藏

自引率

0.00%

发文量

4608

期刊介绍： "Special Oil & Gas Reservoirs," established in 1994, is a national scientific and technological journal supervised by China National Petroleum Corporation and hosted by Liaohe Oilfield Company. It is the only scientific and technological journal both domestically and internationally that comprehensively covers new technologies, theories, and advancements in the exploration and development of special oil and gas reservoirs. The journal is dedicated to promoting technological progress in special oil and gas reservoirs and serving oilfield production.