顶部注气油藏定量评价筛选方法

doi:10.7623/syxb201305015

石油学报 ›› 2013, Vol. 34 ›› Issue (5): 938-946.DOI: 10.7623/syxb201305015

顶部注气油藏定量评价筛选方法

杨超, 李彦兰, 韩洁, 许晓明

中国石油勘探开发研究院北京 100083

收稿日期:2013-01-06 修回日期:2013-04-08 出版日期:2013-09-25 发布日期:2013-08-01
通讯作者: 杨超
作者简介:杨超,男,1986年1月生,2007年毕业于中国石油大学(华东)信息与计算科学专业,现为中国石油勘探开发研究院博士研究生,主要从事高含水老油田二次开发研究。Email:yangchao2010phd@163.com
基金资助:
国家重大科技专项(2011ZX05010-002)资助。

Q uantitative evaluation and screening method for gas assisted gravity drainage reservoirs

YANG Chao, LI Yanlan, HAN Jie, XU Xiaoming

PetroChina Research Institute of Petroleum Exploration & Development, Beijing 100083, China

Received:2013-01-06 Revised:2013-04-08 Online:2013-09-25 Published:2013-08-01

摘要/Abstract

摘要：

为筛选适宜采用顶部注气稳定重力驱提高采收率的高含水油藏,基于大量成功区块的统计样本,借鉴权重评价方法,综合运用灰色关联、试验设计、响应曲面法等数理统计理论,并引入无因次数群对因素进行组合,从而给出了顶部注气稳定重力驱筛选标准、适宜区域和敏感因素最优范围3个定量化判断依据,建立了考虑因素更全面、结果应用更直观、可信度更强的定量化高含水老油田顶部注气评价筛选方法。通过实际计算结果表明:顶部注气筛选标准为适宜度权重大于0.59;正韵律地层存在2个顶部注气适宜区域(第一适宜区域为变异系数小于0.75,无因次数群N_a小于4 802;第二适宜区域为变异系数小于0.75,无因次数群N_a大于28 215);润湿指数范围为0.5~0.6、变异系数小于0.75、地层倾角大于13°的正韵律厚层油藏更适合采用顶部注气开发。该方法在冀东油田高5断块的应用表明,该断块在高含水后期采用顶部注气提高采收率是可行的。

关键词: 顶部注气稳定重力驱, 筛选方法, 灰色关联, 试验设计, 响应曲面法, 无因次数群

Abstract:

In order to assess the feasibility of applying Gravity Assisted Gas Drainage (GAGD) to mature oil fields with high water cut, on the basis of statistical sample data from a large number of successful fields, three discriminant rules, which include GAGD screening criteria, GAGD feasible areas and optimal ranges of sensitive parameters, are determined by introducing weight assessment method and synthetically using some mathematical statistics theories, such as grey relational theory, experimental design and response surface methodology, etc. Then a new comprehensive, intuitive and quantitative screening method for assessing and screening reservoirs to be conducted GAGD is presented. The results shows that the GAGD reservoir screening criteria in terms of fitness weight is greater than 0.59; there exist two GAGD feasible areas in positive rhythm reservoir, that is, zone 1: coefficient of variation<0.75, dimensionless group number Na<4 802; zone 2: coefficient of variation<0.75, dimensionless group number Na>28 215; Positive rhythm thick reservoirs with wettability index in the range of 0.5 to 0.6, coefficient of variation of less than 0.75, formation dip of greater than 15°, are more suitable for the implementation of GAGD. The application of the new screening method in Gao-5 fault block of Jidong oilfield shows that the studied fault block is suitable for GAGD in high water cut period to enhance oil recovery.

Key words: gas assisted gravity drainage (GAGD), screening method, grey correlation theory, design of experiment, response surface methodology, dimensionless group

中图分类号:

TE341

杨超, 李彦兰, 韩洁, 许晓明. 顶部注气油藏定量评价筛选方法[J]. 石油学报, 2013, 34(5): 938-946.

YANG Chao, LI Yanlan, HAN Jie, XU Xiaoming. Q uantitative evaluation and screening method for gas assisted gravity drainage reservoirs[J]. Editorial office of ACTA PETROLEI SINICA, 2013, 34(5): 938-946.

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顶部注气油藏定量评价筛选方法

Q uantitative evaluation and screening method for gas assisted gravity drainage reservoirs

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