Title

Determination of relationship between water cut and recovery percent of four-spot pattern

作者

戚涛吕栋梁李标唐海何泽龙2

单位

西南石油大学石油与天然气工程学院，四川成都 610500 中国石油西南油气田公司重庆审计中心，重庆 400021

Organization

School of Petroleum and Natural Gas Engineering, Southwest University of Petroleum, Chengdu 610500, China Chongqing Audit Center, Southwest Oil and Gas Field Company, PetroChina, Chongqing 400021, China

摘要

含水率和采出程度是油田开发的关键指标。由于低渗透油藏存在非达西渗流特征，目前还无法通过理论方法计算得到含水率与采出程度的关系曲线。文中以四点井网为例，应用单元分析方法和油水两相渗流的流线积分方法，推导出适用于低渗、特低渗油藏的开发指标计算方法，并在此基础上求取了含水率与采出程度的关系曲线。油田实例应用表明，该方法具有一定的可靠性，可为油藏开发指标的预测、开发设计及注水开发评价提供理论依据。

Abstract

The water cut and recovery percent are the key indicators of field development. But at present, the relationship between water cut and recovery percent can not be obtained for low permeability reservoir with theoretical methods because of its non-Darcy flow characteristics. Taking four-spot pattern as an example, this paper uses the element analysis method and flow line integral method of oil-water two phase flow to deduce the calculation method for development indicators of low and ultralow permeability reservoirs. Based on this, the relationship curve between water cut and recovery percent is obtained. The application results of real field show that this method has certain reliability. It can provide theoretic foundation for development indicator prediction, development design and water flooding development evaluation of oil reservoirs.

关键词：

四点井网; 含水率; 采出程度; 产量;

Keywords:

four-spot pattern；water cut; recovery percent; oil production;

DOI

10.6056/dkyqt201402016

四点井网含水率与采出程度关系的确定