高含水后CO2驱油机理的探讨

doi:10.7623/syxb201005016

石油学报 ›› 2010, Vol. 31 ›› Issue (5): 797-800.DOI: 10.7623/syxb201005016

高含水后CO₂驱油机理的探讨

秦积舜 1 张可 2 陈兴隆 1

1中国石油勘探开发研究院提高采收率国家重点实验室北京 100083； 2中国科学院渗流流体力学研究所河北廊坊 065007

收稿日期:2010-01-03 修回日期:2010-02-15 出版日期:2010-09-25 发布日期:2010-11-30
通讯作者: 秦积舜
作者简介:秦积舜，男，1958年8月生，1982年毕业于华东石油学院，现为中国石油勘探开发研究院石油采收率所副所长，主要从事油层物理与渗流力学研究。
基金资助:
国家重点基础研究发展规划（973）项目（2006CB705804）资助。

Mechanism of the CO₂ flooding as reservoirs containing high water

QIN Jishun 1 ZHANG Ke 2 CHEN Xinglong 1

Received:2010-01-03 Revised:2010-02-15 Online:2010-09-25 Published:2010-11-30

摘要/Abstract

摘要：

针对高含水油藏水驱效率低，不流动区域无法波及等问题，利用微观可视模型，研究了CO₂超越水的驱油机理、油膜运移特征以及CO₂与原油间传质过程，并提出了CO₂驱替不连通区域的驱替机制。实验结果表明,在CO₂驱油过程中，原油中的蜡不断在孔喉处沉积并堵塞孔喉，CO₂可以超越孔道中水的阻碍进一步驱替残余油，通过柱面流和柱状流两种流动方式将其中的原油驱替出来，且由于CO₂中分子聚集现象的存在，使其具有较强的溶解原油的能力，可从原油中萃取轻烃组分，对原油中重质组分具有一定的溶解能力。

关键词: 高含水, 二氧化碳驱油机理, 油气超越, 残余油, 分子聚集

Abstract:

Aiming at problems of low or no efficiency of water flooding in high water cut reservoirs or stagnant zones, the present paper studied the mechanism of supercritical CO₂ miscible flooding, migration characteristics of oil film and the mass transfer process between CO₂ and oil by using a high-speed, advanced and visualized camera micro-simulation model, by which the displacement mechanism of transient blind side was observed, and the film migration phenomenon and the mixed phase were also seen. The results have shown that the wax in crude oil continues to be deposited at pore throats and chock up throats, while supercritical CO₂ can surpass water hindrance in pores and further flood the residual oil away in the form of both the cylindrical and columnar flow. Supercritical CO₂ has a strong ability to dissolve oil due to the occurrence of molecular aggregation within it. What is more, it could extract not only light hydrocarbon components but also certain heavy hydrocarbon components from crude oil. Thus, supercritical CO₂ is a kind of good miscible agents for flooding crude oil.

Key words: high water-containing, CO2 flooding mechanism, overrunning of oil &, gas, residual oil, molecular aggregation

秦积舜张可陈兴隆. 高含水后CO₂驱油机理的探讨[J]. 石油学报, 2010, 31(5): 797-800.

QIN Jishun ZHANG Ke CHEN Xinglong. Mechanism of the CO₂ flooding as reservoirs containing high water[J]. Editorial office of ACTA PETROLEI SINICA, 2010, 31(5): 797-800.

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高含水后CO₂驱油机理的探讨

Mechanism of the CO₂ flooding as reservoirs containing high water

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