有限元数值分析法在塔河油田不稳定试井中的应用  

Application of Finite Element Analysis in Transient Well Testing in Tahe Oilfield

作　　者：刘文滨[1] 李明[2] 

机构地区：[1]中国石化西北分公司生产运行处,新疆乌鲁木齐830011 [2]中国石化西北分公司雅克拉采气厂,新疆库车842016

出　　处：《石油钻探技术》2007年第4期87-89,共3页Petroleum Drilling Techniques

摘　　要：塔河油田碳酸盐岩油藏以缝、洞为主要储集体,具有埋藏深、高温、高盐、非均质性强和流体差异性大等特点,并因难以关井测试等原因,限制了资料的录取,使得常规不稳定试井解释存在局限性,不能够完全实现全压力历史拟合,只能够定量描述近井周的地层特性和定性评价远井周储层发育情况。为此,采用了有限元数值试井分析方法进行不稳定试井解释,有限元数值试井分析方法通过油藏离散化,实现对油藏内部不同区域储层渗流条件和流体渗流特征的精细刻画,通过对不同单元的描述,分析油藏内部井间干扰,从而对目的井单元的分析更加全面、准确。利用该方法能有效处理非边界性的曲线不规则上翘、下掉等问题,并通过压力历史曲线的拟合,对产能做出有效预测,为油藏建模、开发方案的制定提供技术基础。The main characteristics of the carbonate reservoirs in Tahe Oilfield include fractures and caves being the main payzones, deeper depth, high temperature, high salt, strong heterogeneity, the huge difference in the properties of formation fluids, etc. Limited data were obtained due to the difficulty in well shut-in for well testing. The limitation existed in the well testing interpretation for the pressure transient well testing and the pressure data could not be matched completely so that formation characteristics around the wellbore could be described quantitatively and the formation in far wellbore region could be evaluate qualitatively. Therefore, the finite element analysis was introduced. The porous conditions and porous characteristics in different zones were described with fine scale through the reservoir discretization. The well intervention between wells were analyzed though the description of different block so that the analysis for the block of target well were more accurate and comprehensive. The curves irregularly going up or down were effectively solved using this technique. The productivity was predicted effectively through matching the pressure data which provided the technical basis for the creation of reservoir model and the design of development plan.

关 键 词：碳酸盐岩油气藏 非均质油气藏 有限元法 不稳定试井 塔河油田 

分 类 号：TE353[石油与天然气工程—油气田开发工程]