石油学报 ›› 2015, Vol. 36 ›› Issue (6): 724-729.DOI: 10.7623/syxb201506009

• 油田开发 • 上一篇    下一篇

致密油藏分段压裂水平井注二氧化碳吞吐物理模拟

杨正明1, 刘学伟1, 张仲宏2, 周拓1, 赵淑霞3   

  1. 1. 中国石油勘探开发研究院廊坊分院渗流流体力学研究所 河北廊坊 065007;
    2. 中国石油勘探与生产公司 北京 100011;
    3. 中国石油化工股份有限公司石油勘探开发研究院 北京 100083
  • 收稿日期:2014-12-07 修回日期:2015-05-04 出版日期:2015-06-25 发布日期:2015-08-06
  • 作者简介:杨正明,男,1969年1月生,1991年获石油大学(华东)学士学位,2004年获中国科学院博士学位,现为中国石油勘探开发研究院廊坊分院渗流流体力学研究所副总工程师,主要从事低渗/致密油气田物理模拟、渗流理论和三次采油方面的研究工作。Email:yzmhxj@263.net
  • 基金资助:

    国家重大科技专项(2011ZX05013-006)和中国石油天然气集团公司重大基础科技攻关课题(2014B-1203)资助。

Physical simulation of staged-fracturing horizontal wells using CO2 huff and puff in tight oil reservoirs

Yang Zhengming1, Liu Xuewei1, Zhang Zhonghong2, Zhou Tuo1, Zhao Shuxia3   

  1. 1. Institute of Porous Flow & Fluid Mechanics, Langfang Branch, PetroChina Research Institute of Exploration and Development, Hebei Langfang 065007, China;
    2. PetroChina Exploration & Production Company, Beijing 100011, China;
    3. Sinopec Exploration & Production Research Institute, Beijing 100083, China
  • Received:2014-12-07 Revised:2015-05-04 Online:2015-06-25 Published:2015-08-06

摘要:

通过建立大模型多点升温和测量方法与CO2吞吐回压控制及测量实验方法,研发了大型露头致密岩样分段压裂水平井注CO2吞吐物理模拟实验系统;通过建立饱和含气模拟油的物理模拟实验方法和大模型抽真空饱和水的物理模拟实验方法,创建了分段压裂水平井注CO2吞吐物理模拟实验方法。在此基础上,针对中国致密油藏储层特性,进行了致密油藏分段压裂水平井注CO2吞吐方式的探索研究。研究结果表明:分段压裂水平井注CO2吞吐物理模拟实验方法能够较好地描述注入CO2在致密油藏分段压裂水平井吞吐的渗流动态,CO2吞吐开发方式能够有效地提高致密油藏的动用程度。在模拟的区块中,CO2吞吐后的最终采出程度要比弹性驱的采出程度高12.5%,该研究成果将对致密油藏的有效开发提供一定技术支持。

关键词: 致密油藏, 水平井, 分段压裂, CO2吞吐, 物理模拟

Abstract:

With the use of large-model multipoint warming measurement method and CO2 huff-puff back-pressure control measurement experimental method, the physical simulation experimental system of CO2 huff-puff in staged-fracturing horizontal wells was developed for large tight outcrop samples, while its corresponding method is set up based on the physical simulation experimental methods of saturated gas-bearing simulated oil and large-model vacuum saturated water. On this basis, aiming at the characteristics of tight oil reservoirs in China, exploration and research were carried out on CO2 huff-puff mode of staged-fracturing horizontal wells in tight oil reservoirs. Research results show that such physical simulation experimental method can be used to better describe the dynamic porous flow of CO2 huff-puff in staged-fracturing horizontal wells, and the CO2 huff-puff development mode is favorable to improve the producing extent of tight oil reservoirs. In the simulated blocks, the eventual recovery degree after CO2 huff-puff is increased by 12.5% as compared with that obtained by elastic flooding. This research achievement can provide a certain technical support for effective development of tight oil reservoirs.

Key words: tight oil reservoirs, horizontal well, staged-fracturing, CO2 huff and puff, physical simulation

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