辽河西部凹陷曙1-38-32块大凌河油层储层特征研究

发布时间：2018-03-26 06:38

  本文选题：大凌河油层　切入点：沉积微相　出处：《东北石油大学》2017年硕士论文

【摘要】：本文在充分应用钻井、测井资料的基础上,结合区域地质背景、沉积条件和成岩特征,对曙1-38-32块大凌河油层储层特征进行了系统的研究。本次研究过程中,依据“旋回对比,分级控制”的地层对比与划分原则,以主要标志层控制含油层段的顶底,依据辅助标志层划分油层组、砂岩组,沉积韵律细分小层;以岩石学、沉积学、岩心资料为基础,确定沉积相模式,划分测井相,研究沉积微相的纵向演化及平面展布规律;开展了储层特征的精细刻画,明确了储层四性关系、隔夹层分布、非均质性、微观孔隙结构特征。通过研究认为:研究区大凌河油层段处于近岸重力流水下扇的扇根→扇中部位,储层主要为分流水道砂体;研究区沉积物来源于辽河断陷西部凹陷西侧的西部凸起,组成岩石的矿物成分为石英、长石、岩屑,岩屑成分主要为火成岩,岩石的成份成熟度及结构成熟度较低;研究区大凌河油层砂体平面上连片分布,单井厚度平均70m左右,在中部砂岩厚度最大,向四周逐渐减薄;砂岩胶结类型主要是基底式,孔隙式胶结仅限于细小的颗粒之间;储层属高孔、高渗储层,孔隙类型以以原生的粒间孔为主,裂缝为辅,储层喉道属于中~粗喉结构;油层砂体内部基本无稳定泥岩夹层分布,夹层在砂体内的延伸距离一般小于井距之半,为不稳定夹层,呈小的透镜状分布,夹层层数较少;该块大Ⅰ2~Ⅲ1储层非均质性弱,大Ⅰ1储层非均质性中等,大Ⅲ2储层非均质性强。
[Abstract]:Based on the full application of drilling and logging data, combined with regional geological background, sedimentary conditions and diagenetic characteristics, this paper systematically studies the reservoir characteristics of Daling River reservoir in block Shu 1-38-32. According to the principle of stratigraphic correlation and division, the main marker layer is used to control the top and bottom of the oil-bearing formation, according to the auxiliary marker layer, the oil-bearing formation, sandstone formation, sedimentary rhythm subdivision sublayer, based on petrology, sedimentology, core data, etc. Determining sedimentary facies model, dividing well logging facies, studying the longitudinal evolution and plane distribution of sedimentary microfacies, developing fine characterization of reservoir characteristics, defining the relationship of reservoir four properties, separating intercalation distribution, heterogeneity, It is considered that the Daling River oil layer in the study area is located at the fan root of the lower fan of income with gravity in the near shore. 鈫扞n the middle part of fan, the reservoir is mainly composed of distributary channel sand body, the sediment in the study area comes from the western uplift in the west side of the western depression of Liaohe fault depression, and the mineral composition of the rock is composed of quartz, feldspar, lithic, lithic, igneous rock. The composition maturity and structure maturity of rock is low, the sand body of Dalinghe oil reservoir in the study area is distributed on the plane, the average thickness of single well is about 70 m, the thickness of sandstone is the largest in the middle part, and the thickness is gradually thinning around, the type of sandstone cementation is mainly basement type. The pore type cementation is confined to the fine particles, the reservoir belongs to high porosity and high permeability reservoir, the pore type is mainly primary intergranular pore, the fracture is auxiliary, the reservoir throat belongs to the middle to coarse throat structure. There is basically no stable mudstone intercalation distribution in the sand body of oil reservoir, the extension distance of intercalation in sand body is generally less than half of well spacing, it is unstable intercalation, it is small lenticular distribution, the intercalation layer number is less, the heterogeneity of reservoir 鈪，

本文编号：1666774