库车坳陷白垩系巴什基奇克组成像测井沉积学研究

Imaging Logging Sedimentary Research on the Bashijiqike Formation of Cretaceous System at Kuqa Depression

摘要: 库车坳陷白垩系油气资源丰富，是塔里木盆地油气勘探的主力阵地之一。本文利用大量岩心，结合岩心薄片资料、常规测井特征与成像测井响应特征标定技术，充分发挥成像资料在识别沉积构造上的优势，建立相关典型沉积构造的地质模式/电成像模式/成像特征描述等一体化的成像解释图版，最终形成了一套较系统的井壁成像测井快速识别评价岩性岩相的配套方法，为地层沉积微相研究提供了重要依据，形成了碎屑岩储层评价领域的新的特色技术。应用实践表明，成像测井沉积学研究在解释岩性、沉积构造、沉积序列等方面有较好效果，并对无岩心段的沉积特征解释更是有极大帮助，且图像形象直观，不仅可以降低勘探成本，而且还可以提高沉积学研究的精度，进而提高油气田的勘探效率。

Abstract: The clastic rocks in the bashijiqike formation of cretaceous system at the Kuqa Depression of Tarim basin contain tremendous potential in exploration of natural gas. This article utilizes a large number of rock cores, combined with thin sections, logging characteristics, and imaging logging response calibration techniques, to fully leverage the advantages of imaging data in identifying sedimentary structures. It establishes an integrated imaging interpretation chart for geological models/electrical imaging models/imaging feature descriptions of typical sedimentary structures, and ultimately forms a relatively systematic matching method for rapid identification and evaluation of lithology and lithofacies through wellbore imaging logging. This provides an important basis for the study of sedimentary microfacies in strata and forms a new characteristic technology in the field of clastic rock reservoir evaluation. Application practice shows that imaging logging sedimentology analysis has a good effect in interpreting lithology, sedimentary structure and sedimentary sequence, and is of great help to the interpretation of sedimentary characteristics of coreless sections. Moreover, the image is intuitive, which can not only reduce the exploration cost, but also improve the accuracy of sedimentology research, and then improve the exploration efficiency of oil and gas fields.