一种基于两点法求解井网密度与采收率关系的方法  

A method for solving the relationship between well pattern density and oil recovery based on two-point method

作　　者：黄映仕 缪云 徐伟 王丹翎 HUANG Yingshi;MIAO Yun;XU Wei;WANG Danling(Shenzhen Branch of CNOOC(China)Co.,Ltd.,Shenzhen Guangdong 518067,China)

机构地区：[1]中海石油(中国)有限公司深圳分公司,广东深圳518067

出　　处：《石油化工应用》2023年第9期25-28,共4页Petrochemical Industry Application

基　　金：中海油深圳分公司生产性科研项目“海相砂岩油藏高速开采下稳产策略研究”(SCKY-2020-SZ-26)。

摘　　要：在井网密度影响采收率的计算中,谢尔卡乔夫方法是一种行业内常用的油藏工程方法,但该方法需要有大量油田开发历史数据作为统计分析基础,对于开发历史较短且样本数据较少的南海东部油田,需要建立适合于自己的井网密度与油藏采收率关系公式。本文引入驱油效率校正系数,对谢尔卡乔夫公式进行修正,通过两点求解的方法先确定单一油藏谢尔卡乔夫公式,再统计分析影响驱油效率校正系数和井网密度校正系数的地质油藏主控因素及其关联性,得出适用于南海东部某海相砂岩油田的井网密度与采收率公式。实例研究表明,该方法简化了求解工作量,能很好地反映井网密度与采收率的关系,可为采收率及井网加密潜力评价提供一种新方法。The Serkachev method is a common reservoir engineering method used in the industry to calculate the effect of well pattern density on recovery.This method needs a large number of oilfield development history data as the basis of statistical analysis.For the East South China Sea oilfield with a short development history and few sample data,can we also statistically regress the relationship formula between well pattern density and reservoir recovery factor that is suitable for the oilfields.This paper attempts to introduce the correction coefficient of oil displacement efficiency and modify the Serkachev formula.The Serkachev formula of a single reservoir is determined by two-point solution method,and then the main control factors of geological reservoir that affect the correction coefficients of oil displacement efficiency and well pattern density are statistically analyzed.The formula of well pattern density and recovery factor for a marine sandstone oilfield in South China Sea is then obtained.Example study show that the proposed method simplifies the solution workload,can well reflect the relationship between oil recovery and well pattern density,and can provide a new method for the evaluation of oil recovery and well pattern infill potential.

关 键 词：谢尔卡乔夫公式 驱油效率 井网密度 采收率 

分 类 号：TE327[石油与天然气工程—油气田开发工程]