新疆石油地质

新疆石油地质 ›› 2003, Vol. 24 ›› Issue (4): 325-328.

• 油藏工程 • 上一篇    下一篇

任11井山头注氮气可行性研究

赫恩杰1,2, 蒋明1,2, 许爱云2, 宋富霞2, 闫爱华2, 朱红莉3   

  1. 1.石油大学 石油天然气工程学院,北京 102200;
    2.中国石油 华北油田分公司 勘探开发研究院,河北 任丘 062552;
    3.中国石油 华北油田分公司 采油一厂,河北 任丘 062552
  • 收稿日期:2002-08-12 修回日期:2002-12-18 发布日期:2021-01-13
  • 作者简介:赫恩杰(1963-),男,河北沧州人,在读博士研究生,油气田开发。联系电话:0317-2793040

Feasibility Study on EOR by Nitrogen Injection Process in Ren 11 Well Buried Hill Reservoir, North China

HE En-jie1,2, JIANG Ming1,2, XU Ai-yun2, SONG Fu-xia2, YAN Ai-hua2, ZHU Hong-li3   

  1. 1. College of Oil and Gas Engineering, University of Petroleum, Beijing 102200, China;
    2. Research Institute of Exploration and Development, Huabei Oilfield Company, PetroChina, Renqiu, Hebei 062552, China;
    3. No.1 Oil Production Plant, Huabei Oilfield Company, PetroChina, Renqiu, Hebei 062552, China
  • Received:2002-08-12 Revised:2002-12-18 Published:2021-01-13

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摘要： 碳酸盐岩潜山油藏是华北油区的主要油藏类型,其动用地质储量占全油区的60%左右,目前已进入高含水开发期,如何挖潜剩余油潜力,进一步提高采收率,是目前的主要工作方向。针对任11井山头块状底水潜山油藏的地质及生产特点,分析了注氮气提高采收率的机理及有利地质条件;在数值模拟的基础上,论证了任11井山头注氮气提高采收率的可行性,对注气井数、油气水平衡时间、采液速度、注气采油方式、注气速度、注气时机和开发井网等技术政策界限进行了优化研究。研究结果表明,任11井山头在一定工艺技术保障下,注氮气提高采收率是可行的,预计注气形成的富集油带厚度约200m,采收率提高4%左右。

关键词: 华北油田, 潜山油气藏, 注氮气, 采收率, 可行性研究, 数值模拟

Abstract: As a major reservoir type in North China^s oil domain, buried hill reservoirs accounting for about 60% of the total producing OOIP have been into high water-cut development stage. How to dig the remaining oil potential and enhancing oil recovery further is dominant work target now. The EOR mechanism by nitrogen injection process and geologic condition are analyzed in the light of geology and production characteristic of massive carbonate reservoir with bottom aquifer in Ren 11 Well buried hill. Based on the numerical simulation, feasibility of EOR by nitrogen injection process is discussed, providing studies on optimization of well number of nitrogen injection, equilibrium time of oil, gas and water, fluid production rate, process of gas-injection recovery, gas injection rate and timing, well pattern, etc. Results show that EOR by nitrogen injection process in Ren 11 Well buried hill reservoir is feasible under the support of technology available, with estimated oil-enriched zone thickness formed by nitrogen injection about 200m and incremental recovery about 4%.

Key words: Huabei oilfield, buried hill reservoir, nitrogen injection, recovery factor, feasibility study, numerical simulation

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