油藏描述中的建模技术

MODEL BUILDING TECHNIQUE IN RESERVOIR DESCRIPTION

姚军辉 游秀玲 张绪建 邹红 马新玉

Yao Junhui You Xiuling Zhang Xujian Zou Hong Ma Xinyu

利用软件系统在工作站上将各种地质信息多层次交互应用,可从三维空间定性、定量地描述油气藏的储层沉积相、储层参数、流体的分布特征和变化规律。依据区域地质分析结合对钻井、粒度等资料的综合解释建立储层沉积相模型。应用算术平均法或权衡法等方法求取储层的渗透率和孔隙度等物性参数;用成岩系数来定量描述储集层成岩作用的综合效应,研究表明成岩系数与渗透率、孔隙度有较好的对应关系;应用渗透率的变异系数、突变系数和极差可研究储层的非均质性;在此基础上建立储层的参数模型。利用油气藏的特征参数建立其数学模型并对油气藏的相态类型进行早期判别。通过上述模型的建立达到为油藏数值模拟与制定开发方案提供精确的地质参数。

The sedimentary facies,physical parameters of a reservoir as well as its fluid distribution characters and variation regularities could be described qualitatively and quantitatively in three dimensional space through compiling a software system in working station with the help of geological informations;the sedimentary facies model of the reservoir could be established based on the analysis of regional geology,and the data of drilling and grain size;reservoir parameter model could be built through calculating reservoir parameters such as the coefficient of diagenesis,porosity,permeability and heiterogeneity.Then the mathematical model of the reservoir could be built based on its special parameters and the phase states of oil or gas pools could be distinguished.These models could provide accurate parameters for reservoir numerical simulation and for hydrocarbon exploration planning.

10.11743/ogg19970106