超稠油油藏EBIP厚度变化模式对SAGD的影响

doi:10.11885/j.issn.1674-5086.2020.06.15.02

西南石油大学学报(自然科学版) ›› 2020, Vol. 42 ›› Issue (5): 127-134.DOI: 10.11885/j.issn.1674-5086.2020.06.15.02

超稠油油藏EBIP厚度变化模式对SAGD的影响

段永刚¹, 伍梓健¹, 魏明强¹, 任科屹², 卢川³

1. 西南石油大学石油与天然气工程学院, 四川成都 610500;
2. 西南石油大学图书馆, 四川成都 610500;
3. 中海石油(中国)有限公司北京研究中心, 北京朝阳 100028

收稿日期:2020-06-15 出版日期:2020-10-10 发布日期:2020-10-10
通讯作者: 段永刚,E-mail:nanchongdyg@163.com
作者简介:段永刚,1963年生,男,汉族,四川仁寿人,教授,博士生导师,主要从事复杂结构井渗流、试井和产能评价、完井及稠油热采等方面的教学及科研工作。E-mail:nanchongdyg@163.com;伍梓健,1995年生,男,汉族,四川成都人,硕士研究生,主要从事油藏工程与油气田开发方面的研究。E-mail:932791380@qq.com;魏明强,1986年,男,汉族,四川隆昌人,讲师,主要从事复杂油气藏渗流、试井、产能及测试解释等方面的研究工作。E-mail:weiqiang425@163.com;任科屹,1989年生,男,汉族,四川南充人,讲师,主要从事稠油油藏开发、油气藏试井及产能评价等研究工作。E-mail:myhyun1989@163.com;卢川,1987年生,男,满族,四川南充人,工程师,主要从事稠油热采和油藏数值模拟等方面的研究。E-mail:luchuan2106@163.com
基金资助:
国家科技重大专项（2016ZX05031-003-06）

Influence of EBIP Thickness Variation Modes on SAGD Production Characteristics in Super Heavy Oil Reservoirs

DUAN Yonggang¹, WU Zijian¹, WEI Mingqiang¹, REN Keyi², LU Chuan³

1. Petroleum Engineering School, Southwest Petroleum University, Chengdu, Sichuan 610500, China;
2. Library of Southwest Petroleum University, Chengdu, Sichuan 610500, China;
3. China National Offshore Oil Corp Research Institute, Chaoyang, Beijing 100028, China

Received:2020-06-15 Online:2020-10-10 Published:2020-10-10

摘要/Abstract

摘要： SAGD技术是一种非常具有潜力的稠油开发方式，已在超稠油/油砂开发中取得了良好效果。由于储层沉积原因，SAGD水平井段对应的EBIP有效储层厚度通常会发生变化，使得SAGD井组开发效果差异明显。为了明确EBIP厚度沿水平井段变化对SAGD生产的影响，以加拿大Long Lake油田地质特征为基础，构建了3种典型EBIP厚度变化模式，建立了SAGD数值模拟机理模型，分析讨论了沿程EBIP变化模式和厚度差对SAGD蒸汽腔突破、日产油、累计汽油比和采出程度的影响，明确了EBIP厚度变化对SAGD生产影响的界限。研究表明，在储层总厚度相同下，阶梯状EBIP变化模式峰值产油速度和采出程度最低，其他两种方式生产特征相近；阶梯状EBIP模式下，厚度差64 m为优，4<厚度差<10 m为良，厚度差>10 m为差；两厚一薄和两薄一厚EBIP模式，厚度差<7 m为优，厚度差>7 m对SAGD生产影响大。

关键词: 超稠油, 蒸汽辅助重力泄油, 有效储层厚度, EBIP, 峰值产量

Abstract: Steam assisted gravity drainage (SAGD) is a promising heavy oil development method, which has achieved good results in super heavy oil/oil sand development. Due to reservoir sedimentation, the effective reservoir thickness (EBIP) along the SAGD horizontal well section will change, which makes the development effect of SAGD well group significantly different. In order to make clear the influence of EBIP changing along horizontal well section to SAGD production, based on the geological characteristics of Long Lake oilfield in Canada, 3 typical EBIP thickness change modes are constructed. Subsequently, the SAGD numerical simulation mechanism model is established, and SAGD steam chamber breakthrough, daily oil production, cumulative gasoline ratio and recovery degree influenced by the EBIP change modes and thickness difference are analyzed and discussed. Finally, limits of on SAGD production which are influenced by the EBIP thickness are built. The results show that under the same total thickness of reservoir, the peak oil production speed and recovery degree of stepped EBIP change mode are the lowest, and the production characteristics of the other two modes are similar. Under stepped EBIP mode, the thickness difference 6 4 m is excellent, the thickness difference of 4～10 m is good, and the thickness difference >10 m is poor. Under two thick-one thin and two thin-one thick EBIP mode, the thickness difference <7 m is excellent, and the thickness difference >7 m has a great impact on SAGD production.

Key words: super heavy oil, SAGD, effective reservoir thickness, EBIP, peak production rate

中图分类号:

TE312

段永刚, 伍梓健, 魏明强, 任科屹, 卢川. 超稠油油藏EBIP厚度变化模式对SAGD的影响[J]. 西南石油大学学报(自然科学版), 2020, 42(5): 127-134.

DUAN Yonggang, WU Zijian, WEI Mingqiang, REN Keyi, LU Chuan. Influence of EBIP Thickness Variation Modes on SAGD Production Characteristics in Super Heavy Oil Reservoirs[J]. 西南石油大学学报(自然科学版), 2020, 42(5): 127-134.

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超稠油油藏EBIP厚度变化模式对SAGD的影响

Influence of EBIP Thickness Variation Modes on SAGD Production Characteristics in Super Heavy Oil Reservoirs

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