水驱砂岩油藏压力变化率研究  

Study on the Rate of Pressure Change for Water-flooding Sandstone Reservoirs

作　　者：朱圣举[1,2] 朱洁 张皎生[1,2] ZHU Shengju;ZHU Jie;ZHANG Jiaosheng(Research Institute of Exploration and Development,Changqing Oilfield Company,PetroChina,Xi'an 710018,China;National Engineering Laboratory for Exploration and Development of Low-Permeability Oil&Gas Fields,Xi'an 710018,China;The Sixth Gas Production Plant,Changqing Oilfield Company,PetroChina,Xi'an 710018,China)

机构地区：[1]中国石油长庆油田分公司勘探开发研究院,西安710018 [2]低渗透油气田勘探开发国家工程实验室,西安710018 [3]中国石油长庆油田分公司第六采气厂,西安710018

出　　处：《重庆科技学院学报（自然科学版）》2021年第5期34-37,共4页Journal of Chongqing University of Science and Technology：Natural Sciences Edition

基　　金：国家科技重大专项“鄂尔多斯盆地大型低渗透岩性地层油气藏开发示范工程”(2016ZX05050)。

摘　　要：为了评价水驱砂岩油藏压力变化率的合理性,依据物质平衡原理,结合油藏综合水驱规律,建立了描述油藏压力变化率变化规律的数学模型。并以鄂尔多斯盆地某水驱砂岩油藏为实例,进行了分析。结果表明:油藏压力变化率与含水率的关系曲线因广义累积注采比Z的不同而呈现不同的特征,当Z>1.0且不断增大时,油藏压力变化率与含水上升率正相关;反之亦然。油藏压力变化率与含水上升率的关系曲线呈“喇叭形”,当Z>1.0且不断增大时,“喇叭形”曲线向上移动;反之亦然。为了保证水驱砂岩油藏的合理开发,实际油藏压力变化率应尽量沿着理论曲线趋势变化。In order to evaluate the rationality of the rate of pressure change(RPC)for water-flooding sandstone reservoirs,a mathematical model which can describe the RPC is established based on the material balance principle and the water flooding law of oil reservoirs.The model is analyzed and applied in a sandstone oil reservoir in Ordos Basin.Analysis results demonstrate that the RPC varies with the variation of Z(generalized cumulative injection production ratio).The RPC gradually increases with the increase of the water-cut when Z is greater than 1.0.The relationship curve between reservoir pressure change rate and water cut rise is“horn shaped”.When Z is greater than 1.0 and increases continuously,the“horn shaped”curve moves upward;vice versa.In order to ensure the reasonable development of water-flooding sandstone reservoirs,the change rate of reservoir pressure should follow the theoretical curve as far as possible.

关 键 词：油藏压力变化率 含水上升率 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]