油气田开发

低渗水驱油藏水平井见水后产能研究新方法

  • 潘中亮 ,
  • 陈 巍 ,
  • 王正来 ,
  • 李 全 ,
  • 苏 磊 ,
  • 赵容怀
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  •  1. 西南石油大学 油气藏地质及开发工程国家重点实验室,成都 610500 ;2. 中国石化中原油田 普光分公司,四川 达州 636155
袁淋( 1990- ),男,西南石油大学在读硕士研究生,研究方向为油气藏工程与渗流力学。 地址:( 610500 )四川省成都市新都区西南石油大学油气藏地质及开发工程国家重点实验室 B403 室。 E-mail : yuanlin343@163.com

网络出版日期: 2015-05-26

基金资助

国家杰出青年科学基金项目“油气渗流力学”(编号: 51125019 )资助

New method for productivity study of horizontal well after water breakthrough in low permeability water flooding reservoir

  • PAN Zhongliang ,
  • CHEN Wei ,
  • WANG Zhenglai ,
  • LI Quan ,
  • SU Lei ,
  • ZHAO Ronghuai
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  •  1.State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation , Southwest Petroleum University , Chengdu 610500 , China ;
    2. Gas Production Plant , Puguang Branch , Zhongyuan Oilfield Company , Sinopec , Dazhou 636155 , Sichuan , China

Online published: 2015-05-26

摘要

在利用水平井开发低渗水驱油藏的过程中,油井见水是制约其产量的一个重要因素。 基于Joshi 水平井产能分析理论,将水平井三维渗流问题简化为 2 个二维平面渗流问题,考虑启动压力梯度,利用保角变换方法分别获得了 2 个二维平面内的产量公式,再结合水驱油藏中非活塞式驱替过程油水两相渗流特征,最终求得了低渗水驱油藏中水平井产油量计算新公式。通过实例计算与对比发现,本文公式与水平井单相经典产能公式计算结果虽然均比实际产油量大,但是本文公式计算结果与实际产油量相对误差最小,为 2.94%,从而证明本文公式准确性较高、实用性较好。 此项研究为低渗水驱油藏水平井见水后产量预测提供了新的思路。

本文引用格式

潘中亮 , 陈 巍 , 王正来 , 李 全 , 苏 磊 , 赵容怀 . 低渗水驱油藏水平井见水后产能研究新方法[J]. 岩性油气藏, 2015 , 27(3) : 127 -132 . DOI: 10.3969/j.issn.1673-8926.2015.03.020

Abstract

 During the development of low permeability water flooding reservoir with horizontal well, water breakthrough is an important factor to restrict the production. Based on the Joshi theory of productivity of horizontal well, this paper simplified 3D flow of horizontal well into two 2D flows; considering the startup pressure gradient, used conformal mapping method to obtain productivity formulas in two 2D flow planes respectively; combined with the flow characteristics of oil-water two phase during non-piston-like displacement in water flooding reservoir, eventually obtained a new production formula of horizontal well in low-permeability water flooding reservoir. Through case study and comparison, the results calculated by new formula and single-phase productivity formula of horizontal well are more than the actual output, but the result calculated by new formula has a small relative error with actual output, only of 2.94%. It demonstrates that the new formula has a high degree of accuracy and is very practical. The study will provide a new method for predicting the production after water breakthrough of horizontal well in low permeability water flooding reservoir.

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