四川盆地元坝地区下侏罗统介壳灰岩特征与识别

发布时间：2018-01-15 09:53

本文关键词：四川盆地元坝地区下侏罗统介壳灰岩特征与识别　出处：《西安石油大学学报(自然科学版)》2017年06期 　论文类型：期刊论文

【摘要】：基于岩心和薄片观察、钻井分析、地震测井识别、多元统计等方法,分析了四川盆地下侏罗统自流井组大安寨段一亚段(大一亚段)纯介壳灰岩和含泥介壳灰岩的储层特征及发育相带、地震测井响应特征和识别的方法。研究结果表明:纯介壳灰岩质地纯、厚度大、介壳破碎、重结晶作用强,发育于滩核、滩坡微相,储集空间以构造微裂缝为主,物性差,地震响应上表现为顶部强波峰连续反射,内部高阻抗,测井响应呈低伽马、高电阻率、低声波时差和高密度;含泥介壳灰岩泥质含量高、厚度薄、介壳完整,发育于滩缘、滩坡微相,储集空间主要为粒内、粒间微溶孔、次为壳内微裂缝,物性较好,地震响应上表现为顶部弱—中等波峰较连续反射,内部为中—较高阻抗,测井响应呈中伽马、中低电阻率、中声波时差、中低密度。基于电性差异,采用Fisher判别法能有效区分两者。
[Abstract]:Based on core and thin slice observation, drilling analysis, seismic logging identification, multivariate statistics and so on. The reservoir characteristics and developed facies of pure meso-limestone and mud-bearing meso-limestone in the first member of the Da'anzhai member of the Lower Jurassic Ziliujing formation in Sichuan Basin are analyzed in this paper. The characteristics of seismic logging response and identification methods. The results show that the pure meso-shell limestone is of pure texture, large thickness, broken crust, strong recrystallization, developed in the beach core and beach slope microfacies. The reservoir space is dominated by structural microfractures with poor physical properties. The seismic response is characterized by continuous reflection of the top strong wave peak, high internal impedance, low gamma ray response, high resistivity, low wave time difference and high density. The mudstone has high content, thin thickness, intact mesenchyme, developed in beach margin, beach slope microfacies, and the reservoir space is mainly intragranular, intergranular microsoluble pore, secondary microfracture in crust, and good physical properties. The seismic response shows that the top weak to medium wave peak is more continuous reflection, and the interior is medium to high impedance. The logging response is medium gamma, low resistivity, medium acoustic time difference, medium and low density, based on the difference of electrical properties. The Fisher discriminant method can be used to distinguish the two effectively.
【作者单位】：中国石化勘探分公司研究院;
【基金】：国土资源部油气战略研究中心全国页岩气资源潜力调查评价及有利区优选专项(2009GYXQ15-06)
【分类号】：P534.52;P618.13
【正文快照】： 周霞,梁波.四川盆地元坝地区下侏罗统介壳灰岩特征与识别[J].西安石油大学学报(自然科学版),2017,32(6):35-43.ZHOU Xia,LIANG Bo.Characteristics and recognition of Lower Jurassic shell limestone in Yuanba area of Sichuan Basin[J].Journal ofXi'an Shiyou University

【相似文献】