A new method for evaluation of development performance and recoverable reserves estimation in natural gas flooding reservoirs

doi:10.7623/syxb201506011

Acta Petrolei Sinica ›› 2015, Vol. 36 ›› Issue (6): 740-747.DOI: 10.7623/syxb201506011

• Oil Field Development • Previous Articles Next Articles

A new method for evaluation of development performance and recoverable reserves estimation in natural gas flooding reservoirs

Tong Kaijun, Zhang Yingchun, Dai Weihua, Zheng Hao, Nie Lingling, Wang Yuejie

Bohai Petroleum Research Institute, Tianjin Branch, CNOOC China Limited, Tianjin 300452, China

Received:2014-12-23 Revised:2015-04-05 Online:2015-06-25 Published:2015-08-06

天然气驱油藏开发动态评价及可采储量预测新方法

童凯军, 张迎春, 戴卫华, 郑浩, 聂玲玲, 王月杰

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

作者简介:童凯军,男,1984年7月生,2006年获成都理工大学学士学位,2009年获成都理工大学硕士学位,现为中海石油(中国)有限公司天津分公司渤海石油研究院油藏工程师,主要从事油气田开发方面的研究工作。Email:tongkaijun714@126.com
基金资助:
国家重大科技专项(2011ZX05057-001)和中国海洋石油总公司"十二五"重大科技专项(CNOOC-KJ125ZDXM06LTD-02)资助。

Abstract

Abstract:

Natural gas flooding reservoirs are the dominant development type of hydrocarbon reservoirs in China. At present, researches on gas flooding reservoirs mainly focus on the gas channeling laws, but lack of targeted production performance monitoring and assessment method. According to oil-gas phase percolation laws and material equilibrium equation, the gas flooding characteristic curve was derived, and applicable for assessment of development index and prediction of gas flooding oil reservoirs. Meanwhile, the economic-limit gas-oil ratio and initial boundary conditions were introduced to derive and prepare the theoretical chart of dimensionless gas fractional flow and recovery degree. This chart can be used to assess oilfield development effect rapidly and intuitively. Moreover, the numerical simulation method was applied to analyze and discuss the influences of well pattern infilling, working system adjustment and oil well measures on the morphology of gas flooding characteristic curve, so as to demonstrate the applicability of such new gas flooding characteristic curve. It is proven by actual applications that the new method for predicting gas flooding development dynamics is not only better consistent with the results calculated by numerical simulation method and production attenuation method, but also has certain practical significance in predicting the development index of gas flooding oil reservoirs.

Key words: gas flooding reservoir, relative permeability, gas flooding characteristic curve, recoverable oil reserves, evaluation of development performance

摘要：

天然气驱油藏在中国油气藏开发类型中占有重要比例。目前针对气驱油藏的研究多集中于气窜规律分析,矿场缺乏针对性的生产动态监测与评价方法。从油-气两相渗流规律和物质平衡方程出发,推导了适用于气驱油藏开发指标评价及预测的气驱特征曲线。同时,通过引入经济极限气/油比及初始与边界条件,推导并绘制了无因次气体分流量与采出程度之间的理论图版,利用该图版可以快速、直观地评价油田开发效果。应用数值模拟方法,分析讨论了井网加密、工作制度调整及油井措施对气驱特征曲线形态的影响,论证了新型气驱特征曲线的适用性。实际应用结果表明,新方法预测气驱油藏开发动态与数值模拟法及产量衰减法计算结果吻合较好,对气驱油藏开发指标预测具有一定的实用性。

关键词: 气驱油藏, 相对渗透率, 气驱特征曲线, 可采储量, 开发动态评价

CLC Number:

TE328

Tong Kaijun, Zhang Yingchun, Dai Weihua, Zheng Hao, Nie Lingling, Wang Yuejie. A new method for evaluation of development performance and recoverable reserves estimation in natural gas flooding reservoirs[J]. Acta Petrolei Sinica, 2015, 36(6): 740-747.

童凯军, 张迎春, 戴卫华, 郑浩, 聂玲玲, 王月杰. 天然气驱油藏开发动态评价及可采储量预测新方法[J]. 石油学报, 2015, 36(6): 740-747.

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A new method for evaluation of development performance and recoverable reserves estimation in natural gas flooding reservoirs

天然气驱油藏开发动态评价及可采储量预测新方法

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