Pore structure characterization of the Cretaceous Quantou Formation: Results from microresistivity imaging logs in the second scientific drilling borehole (SK-2 east borehole) Songliao basin, northeast China
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首页> 外文期刊>Journal of Petroleum Science & Engineering >Pore structure characterization of the Cretaceous Quantou Formation: Results from microresistivity imaging logs in the second scientific drilling borehole (SK-2 east borehole) Songliao basin, northeast China
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Pore structure characterization of the Cretaceous Quantou Formation: Results from microresistivity imaging logs in the second scientific drilling borehole (SK-2 east borehole) Songliao basin, northeast China

机译：白垩纪Quantou地层的孔隙结构特征：微小科学钻孔钻孔（SK-2 East Borehole）松辽盆地，MicroLeistive成像日志的结果

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AbstractAs the main borehole of the China Cretaceous Continental Scientific Drilling Project, the SK-2 east borehole was drilled to obtain in-situ multi-information of geophysics and investigate the paleoclimatic and environmental changes. A study based on continuous geophysical logs facilitates achievement of scientific goals, such as the establishment of the typical petrophysical properties for Songliao basin and other similar basins, analysis of sedimentary environment, resource exploration, geothermal system research, and long-term observation and fluid experiments on deep strata. Both conventional logs and microresistivity imaging logs of the Cretaceous Quantou formation have been acquired. Porosity spectra from microresistivity imaging logs are obtained by using the Archie equation. Based on analysis of porosity spectrum features, we divide the porosity spectra of K1q in the SK-2 east borehole into twelve configurations according to the location and combination of peaks to characterize different pore structure. The porosity spectra of K1q in the SK-2 east borehole are dominated by unimodal distribution indicating more primary porosity. Five layers dominated by unimodal distribution are considered for performing long-term observations and fluid experiments on aspects of depth, thickness or petrophysical properties. By comparing spectrum features, porosity spectrum can be used to reflect the heterogeneity and analyze the pore structure of clastic strata. Layered strata will produce complicated porosity spectra as secondary porosity will. It is better to combine porosity spectra with microresistivity image to study secondary porosity. The decline of the porosity heterogeneity in the SK-2 east borehole is demonstrated by two parameters,Φvkand W from porosity spectra, which can indicate the sedimentary environment. Moreover, porosity spectra in clastic strata is favorable for determining lithology and sedimentary environment when combined with microresistivity images.Highlights?Porosity spectrum from microresistivity imaging logs is applied in clastic strata.?Configurations of porosity spectrum are subdivided to analyze heterogeneity and pore structure.?Two parameters,Φvkand W, indicating the sedimentary environment are defined.?Porosity spectrum offers helps to understand lithology and sedimentary environment in clastic strata.
机译：<！[CDATA [ 抽象 作为中国白垩纪大陆科学钻井项目的主要钻孔，SK-2东钻孔被钻到了地球物理的原位多信息，并调查古模跨境和环境变化。基于连续地球物理日志的一项研究促进了科学目标的实现，如建立松辽盆地和其他类似盆地的典型岩石物理，沉积环境分析，资源勘探，地热系统研究以及长期观测和流体实验在深层阶层。已经获得了白垩纪Quantou地层的常规日志和微侦测成像日志。通过使用Archie方程获得来自微侦测成像日志的孔隙率光谱。基于孔隙率谱特征的分析，我们将K 1 Q的孔隙谱分为根据位置和组合的十二个配置峰值表征不同的孔隙结构。 k 1 q在sk-2东钻孔中的孔隙率光谱由单峰分布主导，表明更多主要孔隙率。由单峰分布为主的五层被认为是在深度，厚度或岩石物理性质方面进行长期观测和流体实验。通过比较光谱特征，可以使用孔隙率光谱来反映异质性并分析碎屑层的孔结构。分层地层将产生复杂的孔隙率光谱作为次级孔隙率。优选将孔隙光谱与微侦测图像结合以研究二次孔隙率。 SK-2东钻孔中的孔隙率异质性的下降由两个参数， φ v K / MML：MI> 和W来自孔隙光谱，可以指示沉积环境。此外，克拉特地段中的孔隙率光谱有利于在与微侦测图像结合时确定岩性和沉积环境。 亮点 ？ 来自微侦测成像日志的孔隙率频谱应用于碎片地层。 ？ 孔隙频谱的配置细分为分析异质性和孔结构。 ？ 两个参数， φ V K 和w，指示沉积环境。 ？ 孔隙度频谱优惠有助于理解岩性和沉积环境有助于理解岩性和沉积环境在碎片地层。

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