满足水驱规律的合理地层压力保持水平  

Reasonable formation pressure maintenance level meeting the water flooding law of oil reservoirs

作　　者：朱洁[1] 张亚敏[1] 朱圣举[2,3] 

机构地区：[1]长安大学地球科学与资源学院,陕西西安710054 [2]中国石油长庆油田分公司勘探开发研究院,陕西西安710018 [3]低渗透油气田勘探开发国家工程实验室,陕西西安710018

出　　处：《西安石油大学学报（自然科学版）》2015年第1期38-41,6,共4页Journal of Xi’an Shiyou University（Natural Science Edition）

基　　金：国家科技重大专项"鄂尔多斯盆地大型低渗透岩性油气藏开发示范工程"(编号:2011ZX05044)

摘　　要：为了评价油藏不同开发阶段地层压力保持水平的合理性,依据物质平衡原理,结合油藏的综合水驱规律,建立了能够描述不同注采比、不同地质储量采出程度条件下的地层压力保持水平数学模型。并以鄂尔多斯盆地某砂岩油藏为实例,对模型进行了简化。分析结果表明:依据累积注采比大于1.0或小于1.0且变化趋势不同时,油藏的合理地层压力保持水平呈现不同的变化规律;当累积注采比小于1.0且递增时,地层压力保持水平有极小值;当累积注采比大于1.0且递减时,地层压力保持水平有极大值。In order to evaluate the rationality of the formation pressure maintenance level(FPML) in various development stages,a general mathematical model which can describing the FPML under different accumulative injection-production ratios(AIPR) and different recovery percents of oil reserves is established based on the material balance principle and the water flooding law of oil reservoirs.The model is simplified according to the conditions of a sandstone oil reservoir in Ordos Basin. Analysis results demonstrate that the FPML varies with the variation of the AIPR; there is a minimum FPML when the AIPR is always less than 1. 0 and gradually increases;there is a maximum FPML when the AIPR is always greater than 1. 0 and gradually decreases.

关 键 词：合理地层压力保持水平 注采比 物质平衡方程 水驱特征曲线 砂岩油藏 

分 类 号：TE311[石油与天然气工程—油气田开发工程]