【作者】 张世广；

【导师】 柳成志；

【作者基本信息】 大庆石油学院 ， 矿产普查与勘探， 2006， 硕士

【摘要】 为了解决大庆长垣东部低孔、低渗地区在开发中、后期由于储层非均质性认识不清造成的诸多生产实际问题,本文首次运用高分辨率层序地层学原理和方法,结合现代沉积学、石油地质学及储层特征研究的最新成果,对朝阳沟油田朝1-朝气3区块扶余油层进行了系统的高分辨率层序地层学研究,取得了以下主要研究成果:1.结合区域标准层,识别出2个长期基准面半旋回;通过岩心资料,在研究区目的层识别出41个短期基准面旋回;通过岩心资料标定测井曲线,利用短期基准面旋回的结构类型和叠加样式等在长期基准面旋回框架内组合出7个中期基准面旋回,进而建立了高分辨率层序地层格架并分别对长期、短期、中期基准面旋回特征进行了详细描述。本次研究中长期、短期、中期基准面旋回的识别方法对相似沉积环境具有一定的借鉴意义。2.建立了15种测井微相模式,对41个沉积单元(短期基准面旋回对应的地层)进行了精细沉积微相研究,分析了各沉积单元沉积微相与中、长期基准面旋回的关系。指出辫状河主要发育在长期基准面上升半旋回的早期,高能曲流河主要发育在长期基准面上升半旋回的中期。3.利用取心井段的物性资料,建立了孔隙度、渗透率的预测模型,对研究区内的所有井进行二次解释,分析了各沉积单元孔隙度、渗透率与中、长期基准面旋回的关系。MSC5及MSC6上升半旋回早期沉积单元的孔隙度、渗透率值相对最高。4.分不同沉积微相类型对各沉积单元的隔夹层特征及与中、长期基准面旋回的关系进行了详细分析。5.针对研究区的实际特点,对各沉积单元的层内非均质性、层间非均质性、平面非均质性等宏观非均质性特征及与中、长期基准面旋回的关系进行了详细分析。6.综合利用前述研究成果,引入表征储层性质的储层规模参数、物性参数、渗透率非均质性参数、储层隔夹层参数及含油性参数共5类12项参数,对目的层进行了储层定量综合评价,将储层划分为Ⅰ、Ⅱ、Ⅲ、Ⅳ四个级别,计算结果与中、长期基准面旋回特征、砂体分布特征、沉积相展布特征相吻合,评价结果对油田开发中后期综合调整具有指导意义。该评价方法对同类储层具有一定的借鉴意义。更多还原

【Abstract】 To solve the realistic problems caused by the uncertainty of the heterogeneity of thereservoir during the middle or late stage of oil-field development in the low-permeability andlow-porosity district in the east of the Daqing placanticline, this article have a systematichigh resolution sequence stratigraphic study on the Fuyu reservoir in the Chao1-Chaoqi3block,Chaoyangou oil fields by using the principles and methods of high resolution sequencestratigraphy and modern sedimentology and petroleum geology and latest research results ofreservoir characteristics for the first time. The main results are listed below:1. In combination with regional standards layer, 2 long-term base-level cycles aredistinguished. According to the data of rock cores, 41 short-term base-level cycles aredistinguished. 7 mid-term base-level cycles are distinguished within the framework oflong-term base-level cycles by using rock cores to demarcate logging curve and by using thelogging curve stacking patterns of the short-term base-level cycles, then the high resolutionsequence stratigraphic framework are established and the detailed description to thecharacteristic of the short-term and the mid-term and the long-term base-level cycles arecarried on separately. The identification methods to short-term and mid-term and long-termbase-level cycles in this article are significant to similar sedimentary environment.2. 15 kinds of logging’s microfacies models have been established. We made a deliberatesedimentary microfacies study on the 41 sedimentary units, corresponding to the stratum ofshort-term base-level cycle, and analyzed the relationship between sedimentary macrofaciesof the 41 sedimentary units with the changing mid-term and long-term base-level cycles. It ispointed out that the braided river develops mainly in the early stage of the uprising periods ofthe long-term base-level cycle, and the energetic meandering river develops mainly in themiddle stage of the uprising periods of the long-term base-level cycle.3. By using the physical property of the coring, the predict model of porosity andpermeability are established. We made secondary interpretation to all the wells in theresearching field and analyzed the relationship between porosity and permeability of the 41sedimentary units with the changing mid-term and long-term base-level cycles. The porosityand permeability are much higher in the sedimentary units in the early stage of the uprisingperiods of MSC5 and MSC6 than others.4. Analyzed the characteristic of the intercalation of the 41 sedimentary units and itsrelationship with the changing mid-term and long-term base-level cycles in details bydifferent microfacies.5. Analyzed the macro heterogeneity characteristics including in-layer heterogeneity andthe interlayer heterogeneity and planar heterogeneity of every sedimentary units and itsrelationship with the changing mid-term and long-term base-level cycles in details.6. Using the research results mentioned above, we take 12 parameters in 5 categoriessuch as reservoir size parameters and physical property parameters and permeabilityheterogeneity parameters and intercalation parameters of the reservoir and oil bearingproperties parameters into the quantitative comprehensive evaluation, and classify thereservoir into Ⅰor Ⅱ or Ⅲ or Ⅳ rank. The calculation results are consistent with thecharacteristics of mid-term and long-term base-level cycles and the distribution of sand bodiesand the distribution of sedimentary facies. The evaluation results are instructive to thecomprehensive adjustments during the middle or late stage of oil-field development. Theevaluation methods are significant to the similar reservoir.更多还原