辽中凹陷南洼东营组二段砂岩储层特征及控制因素研究

发布时间：2018-06-03 04:18

  本文选题：辽中凹陷南洼 + 东二段　； 参考：《成都理工大学》2017年硕士论文

【摘要】：辽东湾地区是渤海地区最重要的产油气区之一,具有非常大的勘探潜力。近年来的勘探开发成果表明,辽中凹陷南洼东营组和沙河街组具有良好的油气成藏条件,具备形成大中型油气田的基础,但现有的勘探程度相对较低,研究基础较为薄弱,其中,有关有利储层控制因素及形成机理的研究认识不够明确,是制约该区进一步油气勘探的重要原因。本论文在前人研究的基础上,利用钻井资料、测井资料和岩心观察、薄片鉴定等方法和手段,在以下几个方面取得了一定的认识:(1)确定了辽中凹陷南洼东营组二段(以下简称“东二段”)储层形成沉积环境主要为辫状河三角洲和湖泊相;砂层主要发育在以下沉积微相中:水下分流河道、河口坝、远砂坝等。(2)进行岩石学特征分析,确定了岩石类型、成岩作用类型和成岩阶段划分,主要岩石类型为长石砂岩和岩屑长石砂岩;主要成岩作用为压实作用、胶结作用、溶蚀作用和交代作用等;成岩阶段处于早成岩B和中成岩A期。(3)研究区孔隙类型主要以次生溶蚀孔隙和原生粒间孔为主,溶蚀孔隙中长石溶蚀最为发育,其次有胶结物和杂基的溶蚀扩大孔。根据毛管压力曲线特征,把研究区的孔隙划分为四种类型:Ⅰ类、Ⅱ类、Ⅲ类和Ⅳ类。(4)有利储层发育控制因素主要有沉积因素、成岩因素和埋深因素,综合研究区东二段沉积微相平面图,埋深图以及生烃强度平面图三者进行预测有利储层分布。本文通过储层的沉积相特征、储层岩石学特征、储层成岩作用特征和储层物性特征等内容的研究,对辽中凹陷南洼东二段储层进行了较为全面的分析,明确了控制有利储层的因素,并对研究区东营组有利储集区带进行综合评价,建立优质储层预测模型,对优质储层展布进行预测,为该区下一步勘探和开发提供有力依据。
[Abstract]:The Liaodong Bay area is one of the most important oil and gas producing areas in the Bohai Sea area and has great exploration potential. The results of exploration and development in recent years show that the Dongying formation and Shahejie formation of Nanwa in Liaozhong depression have good oil and gas reservoir forming conditions and have the foundation to form large and medium-sized oil and gas fields, but the existing exploration degree is relatively low, and the research foundation is relatively weak. Among them, the study of favorable reservoir control factors and formation mechanism is not clear, which is an important reason to restrict the further oil and gas exploration in this area. On the basis of previous studies, this paper uses drilling data, logging data and core observation, thin slice identification and other methods and means. In the following several aspects, a certain understanding is obtained: 1) the reservoir formation of the Dongying formation of Nanwa in central Liaoning sag is mainly composed of braided river deltas and lacustrine facies, the sedimentary environment of which is mainly braided river delta and lacustrine facies. Sand layer is mainly developed in the following sedimentary microfacies: underwater distributary channel, estuarine dam, distant sand dam, etc.) the petrological characteristics are analyzed, and the rock types, diagenesis types and diagenetic stages are determined. The main rock types are feldspathic sandstone and lithic feldspar sandstone, the main diagenesis is compaction, cementation, dissolution and metasomatism. In the diagenetic stage, the main pore types are mainly secondary dissolution pore and primary intergranular pore, the feldspar dissolution is the most developed in the dissolution pore, the second is the cementation and the dissolution expansion pore of the complex base in the study area of diagenetic stage B and the middle diagenetic stage A) the main pore types are mainly secondary dissolution pore and primary intergranular pore, and the feldspar dissolution is most developed in the dissolution pore. According to the characteristics of capillary pressure curve, the porosity in the study area is divided into four types: class 鈪，

本文编号：1971442