产品展厅>>产品销售>>辰工试井系列软件>>缝洞型油藏试井分析

缝洞型油藏非均质性非常严重,储层基质物性差,基本不含油,产油部位主要在溶洞、裂缝发育段,钻井过程中如果钻遇溶洞、裂缝发育带,则油井产能高。这类油藏试井曲线不仅种类多,而且部分曲线形态复杂。软件以缝洞型油藏压力恢复试井曲线特征为研究对象,结合勘探开发期间的地震、地质、测井、录井等数据。以力学三大守恒定律为基础,建立井-缝-洞-地层流体流动模型;采用复杂模型的简化方法和方程求解方法,得到缝洞型油藏试井分析典型曲线;采用试井分析方法和全历史计算方法;形成缝洞型油藏试井分析理论及方法体系。

缝洞型油藏试井分析模型建立:针对缝洞油气藏的储层特点,对缝洞型油藏渗流理论进行研究,建立缝洞型油藏试井新模型,对新模型方程进行求解,研究缝洞型油藏试井全历史拟合方法。

缝洞型油藏试井分析方法研究:根据缝洞型油藏的典型曲线特征和无量纲参数的定义,给出图版拟合方法,通过图版拟合给出试井解释中所需变量(如渗透率、表皮系数及洞体积等)的表达式。对压力恢复曲线给出无量纲Horner图形拟合计算方法等。

缝洞型试井分析在新疆西北油田得到应用,可以得到了缝洞型油藏的相关解释结果(溶洞体积、洞距离、洞波动系数、洞阻尼系数、裂缝体积等)。

图1 缝洞型油藏模型图 图2 缝洞型油藏曲线拟合及压力历史拟合图

Products>>Products on Sale>>Chengong Well Testing Software Series>>Fracture-Hole Type Reservoir Well Testing Analysis

The heterogeneity of fracture-hole type reservoir is very serious, the basic reservoir material physical properties are poor and basically oil-free. The oil production is mainly in hole and fracture development section. If hole and fracture development zones are drilled in the drilling process, the productivity of oil wells will be high. There are not only many kinds of well testing curves in this kind of reservoir, but also some of them are complex in shape. The software takes the characteristics of pressure recovery well testing curve of fracture-hole reservoir as the research object, combined with seismic, geological, well testing/logging and other data during exploration and development. Based on the three conservation laws of mechanics, the well-fracture-hole-formation fluid flow model is established, the typical curve of well testing analysis of fracture-hole reservoir is obtained by using the simplified method and equation solution method of complex model, the well testing analysis method and the whole history calculation method are adopted, and the theory and method system of well testing analysis of fracture-hole reservoir are formed.

The well testing analysis model of the fracture-hole type reservoir is established: In view of the reservoir characteristics of the fracture-hole oil and gas reservoir, the seepage theory of the fracture-hole type oil reservoir is studied, a new model of the fracture-hole type oil reservoir well testing is established, and the new model equation is solved, and the full-history simulation method of the fracture-hole type oil reservoir well testing is researched.

The research of well testing analysis method of the fracture-hole type reservoir is as follows: According to the characteristic of the typical curve and the definition of the dimensionless parameters, the chart simulation method is given, and the expression of the required variables (such as permeability, skin factor, hole volume, etc.) in the well testing interpretation is given by the chart simulation. The dimensionless Horner graph simulated calculation method and so on are given to the pressure recovery curve.

Fracture-hole well testing analysis has been applied in northwest Xinjiang Oilfield, and the related interpretation results (hole volume, distance, fluctuation coefficient, damping coefficient, fracture volume, etc.) of fracture-hole reservoir can be obtained.

Figure1: Chart of fracture-hole type oil reservoir model Figure2: Fracture-hole type oil reservoir curve simulation and historical pressure simulation chart