川西坳陷XS地区河道砂体预测研究
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摘要
河道砂体储层具有高孔高渗特征,是重要的油气储层,但河道砂体又具有规模小、横向变化快的特点,常规方法难以预测。以川西坳陷XS地区蓬莱镇组为例,研究河道砂体储层三维可视化预测方法,达到从可视化角度对该类储层进行准确预测的目的。测井研究表明,该区河道砂体具有较好的孔渗性和低自然伽马、低密度、高声波时差的测井特征,在地震剖面中河道砂体储层具有"低频、强振幅、短轴状"的地震响应特征。以此为基础,利用三维可视化浏览方式,发现了蓬莱镇组发育多套河道砂体储层,从三维可视化的立体和平面图上可以清晰地分析河道砂体的空间分布特征和规模,为井位部署、开发方案的确定提供了形象生动的依据。
Channel sandbody had the character of high porosity and high permeability,it was an important oil and gas reservoir,but it also had the character of small scale and rapid lateral changes,it was hard to be predicted with conventional methods.By taking Penglaizhen Formation of XS Area in west Sichuan for example,a 3D visualization method for predicting channel sandstone reservoirs was studied for an accurate visualization prediction of channel sandstone reservoirs.The research of well logging indicates that the channel sandstone of researched area has the characteristics of good porosity and permeability,low GR and low density,high AC etc.And from forward modeling and seismic profile,it is found out that channel sandstone has response characteristics of low frequency,high amplitude,short dimension etc.On the basis stated,from 3D visualization and plane plots,the special distribution and scale the channel sandstone can be clearly analyzed.It provides a vivid basis for arranging well positions and setting up development program.
Channel sandbody had the character of high porosity and high permeability,it was an important oil and gas reservoir,but it also had the character of small scale and rapid lateral changes,it was hard to be predicted with conventional methods.By taking Penglaizhen Formation of XS Area in west Sichuan for example,a 3D visualization method for predicting channel sandstone reservoirs was studied for an accurate visualization prediction of channel sandstone reservoirs.The research of well logging indicates that the channel sandstone of researched area has the characteristics of good porosity and permeability,low GR and low density,high AC etc.And from forward modeling and seismic profile,it is found out that channel sandstone has response characteristics of low frequency,high amplitude,short dimension etc.On the basis stated,from 3D visualization and plane plots,the special distribution and scale the channel sandstone can be clearly analyzed.It provides a vivid basis for arranging well positions and setting up development program.
引文
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[2]马仁安.基于微机的三维地震数据可视化技术研究[D].南京:南京理工大学,2004.
[3]Kidd G D.Fundamentals of3Dseismic volume visualization[J].The Leading Edge,1999,18(6):702～712.
[4]Sheffield T M,Meyer D,Lees J,et al.Geovolume visualization interpretation:Color in3-D volumes[J].The Leading Edge,1999,18(6):668～674.
[5]宋锦丽,董瀚,陈开远,等.大塔场沿层切片沉积微相解释与储层预测研究[J].石油天然气学报,2010,32(2):240～244.
[6]向传刚.水下分流河道内部储层建模方法[J].石油天然气学报,2010,32(3):38～42.
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