Abstract This paper presents an interpreted depositional environment, developed 2nd order sequence stratigraphy framework, and detailed lithofacies identification from two Mississippian Sycamore outcrops (I-35 Sycamore and Speake Ranch) and subsurface wells in the SCOOP (South Central Oklahoma Oil Province). Then these rocks calibrate the rock properties with wireline log responses to identify the best landing zones. Qualitative and quantitative techniques of field, laboratory, and machine learning studies were conducted. For the field studies, we measured the complete 450 ft of the outcrop stratigraphic section, another separate 50 ft outcrop, examined the underlying Woodford Shale and overlying Caney Shale boundary contacts, documented sedimentary structures, constructed an outcrop gamma-ray profile, and developed a sequence stratigraphic framework. Laboratory studies included petrographic analyses, detailed X-ray Fluorescence (XRF), Scanning Electron Microscopy (SEM), and X-ray Diffraction (XRD). For machine learning studies, a principal component analysis (PCA), elbow method, and self-organizing map (SOM) were used to analyze the electrofacies and chemofacies from the outcrop and a subsurface uncored well. The outcrop hand-held gamma ray profile was obtained and correlated with subsurface wells. Five major outcrop lithofacies and chemofacies, within six stratigraphic units of alternating siltstone and shale strata, were identified from the wireline logs. A Maximum Flooding Surface (MFS), and two major 2nd order Sequence Boundaries (SB) were recognized at the outcrop and a nearby subsurface well. Bouma sequences and repetitive cycles of sedimentary structures indicated sediment gravity flow deposition on a marine slope setting. This study provides geologic insights to better understanding the depositional environment and the lithology of the Sycamore rocks. The bioturbated siliceous shale and/or the sandy siltstone can be potential target zones due to their reservoir quality, lithology, bed continuity, and brittleness. This information can be of direct benefit to the exploration and development programs of many companies in the SCOOP area, particularly in the Anadarko and Ardmore basins in Oklahoma.

中文翻译：

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美国俄克拉荷马州 SCOOP 和 STACK 地区密西西比 Sycamore 岩石的岩性、地层学、化学地层学和沉积环境：野外、实验室和机器学习研究露头和地下井

摘要 本文从 SCOOP（俄克拉荷马州中南部石油省）的两个密西西比州 Sycamore 露头（I-35 Sycamore 和 Speake Ranch）和地下井中介绍了解释的沉积环境、发达的二阶层序地层框架和详细的岩相识别。然后这些岩石用电缆测井响应校准岩石特性，以确定最佳着陆区。进行了现场、实验室和机器学习研究的定性和定量技术。对于实地研究，我们测量了整个 450 英尺的露头地层剖面，另一个单独的 50 英尺露头，检查了下伏的伍德福德页岩和上覆的卡尼页岩边界接触，记录了沉积结构，构建了一个露头伽马射线剖面，并开发了层序地层框架。实验室研究包括岩相分析、详细的 X 射线荧光 (XRF)、扫描电子显微镜 (SEM) 和 X 射线衍射 (XRD)。对于机器学习研究，使用主成分分析 (PCA)、肘部方法和自组织图 (SOM) 来分析露头和地下未取芯井的电相和化学相。获得露头手持伽马射线剖面并与地下井相关联。从电缆测井中确定了五个主要的露头岩相和化学相，位于交替的粉砂岩和页岩地层的六个地层单元内。在露头和附近的地下井处识别出最大洪水面 (MFS) 和两个主要的二阶层序边界 (SB)。Bouma 序列和沉积结构的重复循环表明在海洋斜坡环境中沉积物重力流沉积。这项研究为更好地了解 Sycamore 岩石的沉积环境和岩性提供了地质见解。生物扰动的硅质页岩和/或砂质粉砂岩因其储层质量、岩性、床层连续性和脆性而成为潜在的目标区。这些信息可以直接有益于 SCOOP 地区的许多公司的勘探和开发计划，特别是在俄克拉荷马州的阿纳达科和阿德莫尔盆地。生物扰动的硅质页岩和/或砂质粉砂岩因其储层质量、岩性、床层连续性和脆性而成为潜在的目标区。这些信息可以直接有益于 SCOOP 地区的许多公司的勘探和开发计划，特别是在俄克拉荷马州的阿纳达科和阿德莫尔盆地。生物扰动的硅质页岩和/或砂质粉砂岩因其储层质量、岩性、床层连续性和脆性而成为潜在的目标区。这些信息可以直接有益于 SCOOP 地区的许多公司的勘探和开发计划，特别是在俄克拉荷马州的阿纳达科和阿德莫尔盆地。