基于滩控岩溶型白云岩储层分类的渗透率建模方法研究——以川中磨溪—高石梯地区龙王庙组为例

发布时间：2018-03-10 13:31

本文选题：滩控岩溶型　切入点：白云岩储层　出处：《岩性油气藏》2017年03期 　论文类型：期刊论文

【摘要】：川中磨溪—高石梯地区龙王庙组白云岩储层渗透率受岩溶作用的影响较大,现有渗透率计算模型的适用性较差。利用岩心照片、岩石薄片、高压压汞、核磁共振、物性分析、测井等资料,首先根据岩溶作用、储集空间、孔隙结构对储层进行分类,将非均质性极强的滩控岩溶型白云岩储层划分为溶洞型、溶孔型与基质孔隙型3种相对均质的储层类型,再运用全直径岩样与标准柱塞样物性分析结果,借助其表征尺度的差异,对各类型储层进行渗透率建模。全直径岩样表征尺度较大,用以建立溶洞型储层渗透率解释模型;标准柱塞样表征尺度较小,用以建立溶孔型与基质孔隙型储层渗透率解释模型。现场应用结果表明,相对于常规Timur公式与核磁Coates等模型,上述分储层类型计算的渗透率值与岩心分析结果更吻合,有效提高了碳酸盐岩滩控岩溶型白云岩储层渗透率计算结果的准确度。
[Abstract]:The permeability of dolomite reservoir of Longwangmiao formation in Moxi Gaoshiti area, central Sichuan, is greatly affected by karstification, and the applicability of existing permeability calculation model is poor. The reservoir is classified according to karstification, reservoir space and pore structure according to logging data, and the beach controlled karst dolomite reservoir with strong heterogeneity is classified as cavern type. There are three relatively homogeneous reservoir types of dissolved pore type and matrix pore type. The results of physical properties analysis of full-diameter rock samples and standard plunger samples are used to characterize the scale difference. Permeability modeling for various types of reservoirs. The scale of characterization of full-diameter rock samples is large, which is used to establish a permeability interpretation model for cavernous reservoirs, and the standard plunger sample is characterized by a small scale. The field application results show that compared with the conventional Timur formula and the nuclear magnetic Coates model, the permeability values calculated by the above sub-reservoir types are in better agreement with the core analysis results. The calculation accuracy of permeability of carbonate beach controlled karst dolomite reservoir is improved effectively.
【作者单位】：西南石油大学地球科学与技术学院;中国石油西南油气分公司川中油气矿;
【基金】：大型油气田及煤层气开发国家重大科技专项“四川盆地大型碳酸盐岩气田开发示范工程”(编号:2016ZX05052)资助
【分类号】：P618.13;TE31

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