基于区域测井大数据和实验资料的储层流动单元渗透率建模方法  

Permeability calculation in reservoir flow unit based on regional logging big data and experimental data

作　　者：王猛[1] 刘志杰 杨玉卿[1] 张志强[1] 刘海波[1] 董宇 WANG Meng;LIU ZhiJie;YANG YuQing;ZHANG ZhiQiang;LIU HaiBo;DONG Yu(China Oilfield Services Limited,Langfang 065201,China)

机构地区：[1]中海油田服务股份有限公司,廊坊065201

出　　处：《地球物理学进展》2021年第1期274-280,共7页Progress in Geophysics

基　　金：“十三五”国家科技重大专项“大型油气田及煤层气开发:超低渗地层测试技术与装备”(2017ZX05019-004)资助。

摘　　要：渗透率是反映储层渗流特性的参数,其对研究油气运移及油气田勘探开发具有重要意义.目前渗透率计算模型大多精度较低,主要原因是储层纵横向的非均质性和孔隙结构的巨大差异,且现有计算模型适用范围小,应用资料种类单一,不能综合反映区域特征.本文以西湖凹陷3个区带7个构造29口探井的测井资料和岩石物理实验分析资料为研究基础,应用10种渗透率计算方法,最终优选流动单元带法,通过区域测井大数据分析,建立了精度较高的区域性渗透率计算模型.研究表明:同一流动单元处于一个相对稳定的沉积期内,沉积环境和水动力条件稳定,岩性、物性有很强的一致性,建立的渗透率模型精度高,可靠性强,能够直接为区域新钻井的储层评价及探勘开发提供依据.Permeability is a parameter that reflects the character-istics of reservoir seepage, and it is great significance for studying oil and gas migration and exploration. At present, the accuracy of the model in permeability evaluation is low. The main reason is the heterogeneity of the vertical and horizontal reservoirs and the huge difference of the pore structure. The existing calculation model has a small application range, and the application data types are single, which cannot comprehensively reflect the regional characteristics. In this paper, based on the logging data and petro-physical experimental data of 29 exploration wells in seven zones of Xihu Sag, the research used 10 kinds of permeability calculation methods, and the flow unit method is used to analyze permeability by the regional logging big data. A regional permeability evaluation model with high calculation accuracy is established. The research shows that the same flow unit is in a relatively stable deposition period, the sedimentary environment and hydrodynamic conditions are stable, and the lithology and physical properties are highly consistent. The established permeability model has high precision and reliability, and can directly be the region. It also can provide a basis for reservoir evaluation and exploration in a new well.

关 键 词：渗透率 流动单元 测井大数据 FISHER判别 

分 类 号：P631[天文地球—地质矿产勘探]