致密砂岩储层流体密度气水识别研究及应用

The Study on Gas-water Identification of Tight Sandstone Reservoir Fluid Density and Its Application

储层流体密度能够反映出孔隙介质中不同流体的比例结构,流体密度值的大小表明了储层孔隙中气水的分布关系,其物理意义明确,易于解释,可为天然气勘探开发中的储层气水识别等问题提供重要途径。通过井中流体密度计算及利用三维地震数据体反演流体密度的研究,明确了利用流体密度进行储层气水划分和解释的方法。川西某致密砂岩储层流体密度数据的实际应用表明,流体密度气水识别方法具有很高的分辨能力,气水划分准确性高,实用性强,应用前景广阔。

Reservoir fluid density can reflect the proportional structure of different fluids in porous media and the fluid density value shows the distribution relation of gas and water in the reservoir pore,whose physical meaning is clear and easy to interpret and which can provide an important support for the identification of gas and water in gas exploration and development.This paper makes clear the method of using fluid density to divide and interpret the gas and water reservoir through fluid density calculation in well and using the inversion of three-dimensional seismic data to study fluid density.The practical application of fluid density data of a tight sandstone reservoir in western Sichuan shows that the method of gas and water identification of fluid density has high resolution ability,high accuracy in the division of gas and water,strong practicality and broad application prospect.