隔夹层对巨厚砂岩油藏注气开发的影响——以塔里木盆地东河1油田石炭系油藏为例

doi:10.7623/syxb201504008

石油学报 ›› 2015, Vol. 36 ›› Issue (4): 475-481.DOI: 10.7623/syxb201504008

隔夹层对巨厚砂岩油藏注气开发的影响——以塔里木盆地东河1油田石炭系油藏为例

范坤¹, 朱文卿², 周代余¹, 高树生², 邵光强¹, 胡志明²

1. 中国石油塔里木油田公司勘探开发研究院新疆库尔勒 841000;
2. 中国石油勘探开发研究院廊坊分院河北廊坊 065007

收稿日期:2014-10-22 修回日期:2015-02-11 出版日期:2015-04-25 发布日期:2015-04-04
通讯作者: 朱文卿,女,1987年7月生,2009年获中国石油大学(北京)学士学位,2012年获中国石油大学(北京)硕士学位,现为中国石油勘探开发研究院廊坊分院助理工程师,主要从事油气藏开发与渗流机理研究工作。Email:zhuwenqingzhu@163.com
作者简介:范坤,男,1984年4月生,2006年获中国石油大学(北京)学士学位,2009年获中国石油大学(北京)硕士学位,现为中国石油塔里木油田公司勘探开发研究院工程师,主要从事油藏管理和提高采收率工作。Email:fankun-tlm@petrochina.com.cn
基金资助:
国家重大科技专项(2011ZX05013)资助。

Effect of interlayers in thick sandstone reservoir for gas injection: a case study of Donghe 1 Carboniferous oil reservoir in Tarim Basin

Fan Kun¹, Zhu Wenqing², Zhou Daiyu¹, Gao Shusheng², Sao Guangqiang¹, Hu Zhiming²

1. Research Institute of Exploration and Development, PetroChina Tarim Oilfield Company, Xinjiang Korla 841000, China;
2. Langfang Branch, PetroChina Research Institute of Petroleum Exploration and Development, Heibei Langfang 065007, China

Received:2014-10-22 Revised:2015-02-11 Online:2015-04-25 Published:2015-04-04

摘要/Abstract

摘要：

塔里木盆地东河1油田石炭系油藏为巨厚砂岩储层,层内发育的隔夹层对注气开采有重要影响,其对注气的封隔能力决定了注气提高采收率是采用分层动用还是整体动用的开发策略。通过隔夹层岩心物性测试和气体突破压力测试实验,再结合数值模拟计算,研究了注气时隔夹层的封隔能力。实验结果表明:隔夹层渗透率以小于0.01 mD为主,其渗流能力低;干岩心突破压力较低,但一旦被水或油饱和,突破压力大幅度增大,其封隔能力也大幅度增强,岩心的封隔能力则主要受渗透率和隔夹层内流体饱和度的影响。数值计算表明:对渗透率为0.008 mD、厚度为0.2 m的隔夹层,当隔夹层连续时,注气过程中通过隔夹层窜流到临近小层的气窜量不到总注气量的5%,这说明连续隔夹层对注气具有很强的封隔能力;当隔夹层不连续时,隔夹层的展布范围则对其封隔能力有着重要的影响。

关键词: 东河油田, 隔夹层, 突破压力, 注气封隔能力, 数值模拟

Abstract:

The Carboniferous oil accumulation in Donghe 1 Oilfield of Tarim Basin is a huge thick sandstone reservoir, where the interlayer has a significant influence on gas-injection development. The isolation ability of the interlayer determines that whether the gas injection is a development strategy to improve recover using the layered or overall development. The isolation ability of interlayer in gas injection was studied through tests on the physical properties of interlayer cores and gas breakthrough pressures in combination with numerical simulation and calculation. Experimental results have shown that the permeability of interlayer is mainly less than 0.01 mD, indicating a lower permeability; the breakthrough pressure of dry core is lower. Once the interlayer is saturated by water or oil, the breakthrough pressure will increase greatly, as well as the isolation ability, and the latter is mainly influenced by permeability and fluid saturation in the interlayer. The results of numerical calculations indicate that as for the interlayer with the permeability of 0.008 mD and the depth of 0.2 m, the amount of gas channeling from interlayer to adjacent small layers accounts for less than 5% of the total gas injection volume during gas injection in case of a continuity in interlayer, showing the high isolation ability of interlayer in gas injection. If the interlayer is discontinuous, the distribution range of interlayer has a great influence on isolation ability.

Key words: Donghe oilfield, interlayer, tight breakthrough pressure, gas sealing ability, numerical simulation

中图分类号:

TE341

范坤, 朱文卿, 周代余, 高树生, 邵光强, 胡志明. 隔夹层对巨厚砂岩油藏注气开发的影响——以塔里木盆地东河1油田石炭系油藏为例[J]. 石油学报, 2015, 36(4): 475-481.

Fan Kun, Zhu Wenqing, Zhou Daiyu, Gao Shusheng, Sao Guangqiang, Hu Zhiming. Effect of interlayers in thick sandstone reservoir for gas injection: a case study of Donghe 1 Carboniferous oil reservoir in Tarim Basin[J]. Acta Petrolei Sinica, 2015, 36(4): 475-481.

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隔夹层对巨厚砂岩油藏注气开发的影响——以塔里木盆地东河1油田石炭系油藏为例

Effect of interlayers in thick sandstone reservoir for gas injection: a case study of Donghe 1 Carboniferous oil reservoir in Tarim Basin

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