底水油藏水平井关井后水脊下降高度研究  

Study on the variation of water ridge height after horizontal well shut in in bottom water reservoir

作　　者：孙恩慧 郭敬民 张东 杨东东 刘博伟 SUN Enhui;GUO Jingmin;ZHANG Dong;YANG Dongdong;LIU Bowei(Tianjin Branch of CNOOC Ltd.,Tianjin 300452,China)

机构地区：[1]中海石油(中国)有限公司天津分公司渤海石油研究院,天津300452

出　　处：《石油化工应用》2021年第10期60-64,共5页Petrochemical Industry Application

摘　　要：A油藏为典型的底水油藏,目前进入高含水期,关井压锥是一种控制底水脊进的方法。本文结合A油藏的实际地质情况建立数值模型,定义无因次水脊下降高度,建立起不同关井时间下无因次水脊下降高度与水平渗透率、油层厚度、油水黏度比、水油密度差等单因素的关系式,利用非线性回归方法,得到不同关井时间下的无因次水脊下降高度与这些因素的关系式。以A油藏的3口水平井为例,利用本文的关系式计算结果与实际结果的误差为6.1%~9.5%,本文方法具有一定的实用性。A oilfield is a typical bottom water reservoir,which entered the high water cut stage at present.Shut-in cone is a method to control the inflow of bottom water.This paper established a numerical model based on the actual geological conditions of reservoir A,defined dimensionless water ridge drop height,established the relationship between dimensionless water ridge drop height and horizontal permeability,reservoir thickness,oil-water viscosity ratio,oil-water density difference and other single factors under different shut in time,and obtained dimensionless water ridge drop height and these factors under different shut in time by using nonlinear regression method.Taking 3 horizontal wells in A oilfield as an example,the error between the calculated result and the actual result is 6.1%~9.5%,this method has certain practicability.

关 键 词：底水油藏 水平井关井 无因次水脊下降高度 非线性回归 数值模拟方法 

分 类 号：TE345[石油与天然气工程—油气田开发工程]