井震结合识别沉积环境在HF油田中的应用

HF油田位于关索不达米亚平原东南端。目的层沉积于白垩纪中期的阿尔布阶，主要发育一套棕色砂岩与深棕-深灰色泥岩的互层。目的层位于海陆过渡的河控三角洲发育带，主要发育前三角洲、三角洲前缘、三角洲平原沉积相。由于岩心资料有限，利用测井资料和地震资料识别沉积环境显得尤其重要。文中充分利用渡组的反射结构、连续性、振幅、频率、几何外形等地震响应，确认沉积微相类型；根据测井曲线（主要利用自然伽马和电阻率）的形态和幅度变化，结合岩性、韵律等地质特征识别划分单井沉积微相。识别出支流问湾、水下河道、河口坝、远砂坝等沉积微相，其中水下河道和砂坝为较好的储集环境，在单井分析的基础上，通过测井曲线对比建立连井剖面，掌握了砂体的连通性及物性变化特征，并与地震属性相结合,分析沉积相平面展布特征,预测出有利的储层发育带，为后期勘探开发提供了可靠依据。

Application of identification of depositional environment with logging facies and seismic facies in HF Oilfield

HF Oilfield is located in the southeastern part of Mesopotamia Plain. The target zone is deposited in Albian, Middle Cretaceous, whieh mainly dew.lops a set of the interbeds of brown sandstone and dark bruwn-dark gray mudstone. The target zone is located in the development zone of fluvial dominated deha of marine and lan,l transition. Depositional environment of predelta, delta front and delta plain developed. It is extremely important to use the logging data and seismie data to identify the depositional environment due to limited core data. The sedimentary microfacies types are confim~ed through the use of reflection configuration, continuity, amplitude, frequency and geometry configuration. According to the change of vonformation and amplitude of logging curves （mainly using gamma ray and resistivity）, the sedimentary microfacies of single well is divided after combined with the geological ligatures such as lithology and rhyme. Some sedimentary microfacies, including tributary bay, underwater channel, mouth bar, far bar,are identified, in which underwater channel and sand bar are good reservoir environment. Based on the analysis of single well, crosswell sections are established through the comparison of logging curves in this paper, which knows the change features of sanely connectivity anti physical properly. Combined with seismic attribute, plane distribution features of sedimentary facies are analyzed. and favorable reservoir development zones are predicted, which provides a reference for later exploration and development.