基于SAGD开发的油砂储层综合评价——以加拿大长湖西南区块开发优化项目为例  

Comprehensive Reservoir Evaluation of Oil Sands Developed by Steam-assisted Gravity Drainage(SAGD)——A Case Study of Development Optimization Project of Southwestern Block,Long Lake,Canada

作　　者：王晖 刘振坤 胡晓庆 刘新光 梁旭 郑强 王盘根 Wang Hui;Liu Zhenkun;Hu Xiaoqing;Liu Xinguang;Liang Xu;Zheng Qiang;Wang Pangen(CNOOC Research Institute,Beijing 100028;CNOOC International Ltd.,Beijing 100027)

机构地区：[1]中海油研究总院有限责任公司,北京100028 [2]中海油国际有限公司,北京100027

出　　处：《中外能源》2021年第1期40-47,共8页Sino-Global Energy

基　　金：国家油气科技重大专项“油砂SAGD开发地质油藏评价及方案优化技术”(编号:2016ZX05031-003)。

摘　　要：影响SAGD开发的油砂储层的地质因素与常规储层不同,油砂储层的综合评价不如常规储层完善,因此需要明确油砂储层的评价参数和方法。以加拿大长湖油田西南区块开发优化项目为例,通过动静结合分析,确定影响SAGD开发的主要地质因素为可动用储层有效厚度、储量丰度、纯砂岩比例等,在单因素分析的基础上,对油砂储层进行多因素综合分类评价,确定三类储层的地质参数分类界限:Ⅰ类储层储量丰度>6m^(3)/m^(2),且纯砂岩比例>70%;Ⅱ类储层储量丰度介于4m^(3)/m^(2)和6m^(3)/m^(2)之间,且纯砂岩比例介于50%与70%之间;Ⅲ类储层储量丰度≤4m^(3)/m^(2),且纯砂岩比例≤50%。应用油砂储层综合评价方法,确定出不同类型储层的平面分布范围,量化不同类型储层的地质储量,并据此认识优化了地质油藏方案,与原方案相比优化方案开发指标明显改善,推动了该项目的有效开发。The geological factors that affect the oil sand reservoirs developed by SAGD are different from that affect the conventional reservoirs,and the comprehensive evaluation of oil sand reservoirs is not as perfect as that of the conventional reservoirs.Therefore,it is necessary to clarify the evaluation parameters and methods of oil sand reservoirs.Development optimization project in southwestern block of Long Lake Oilfield in Canada is studied as an example.The main geological factors affect SAGD development are determined as effective thickness of producible reservoirs,reserves abundance,pure sandstone ratio by static and dynamic analysis.Multifactor comprehensive classification is made on the oil sand reservoirs based on the single factor analysis.Classification limits of geological parameters of three kinds of reservoirs are determined :reserves abundance of Class Ⅰreservoirs is more than 6 m^(3)/m^(2),and pure sandstone ratio is more than 70%;reserves abundance of C lass Ⅱ reservoirs is between 4 and 6 m^(3)/m^(2),and pure sandstone ratio is between 50% and 70%;reserves abundance of Class Ⅲ reservoirsis 4 m^(3)/m^(2) or less,and pure sandstone ratio is 50% or less.Based on the comprehensive evaluation method of oil sands reservoirs,the plane distribution range of different types of reservoirs is determined,the geological reserves of different types of reservoirs are quantified,and the geological reservoir plan is optimized according to the results.Compared with the original plan,the development index of the optimized plan is significantly improved,which promotes the effective development of the project.

关 键 词：油砂 可动用储层有效厚度 储量丰度 纯砂岩比例 储层综合评价 动用储量 方案优化 

分 类 号：P618.13[天文地球—矿床学] TE345[天文地球—地质学]