【作者】 孙赓轶；

【导师】 肖安成； 李树臣；

【作者基本信息】 浙江大学 ， 地质学， 2011， 硕士

【摘要】 大庆长垣中部地区下白垩统泉头组以三角洲前缘亚相为主,砂体类型主要为分流河道,其中发育的扶杨油层是大庆长垣的有利后备潜力储层,主要分布于大庆长垣的中南部。该区砂体厚度横向变化较快,属低孔、低渗储层,河道砂体不易预测与识别,成为油田勘探、开发的瓶颈。本课题对砂体进行沉积时间单元划分,从平面成因及垂向上沉积演化规律进行了认识,进而研究储层的分布规律,为油田开发提供技术支撑。本文在充分调研国内扶杨油层描述方法的基础上,综合运用沉积学理论以及层序地层学原理,以取心井资料为依据,在大的沉积背景下分析扶杨油层沉积环境,确定扶杨油层沉积单元界限及对比标志,垂向上细分为57个沉积单元；利用测井曲线的岩电对比关系,建立适合扶杨油层的标准测井微相模式；通过绘制基准线旋回剖面,搞清了扶杨油层沉积环境和砂体沉积特征。在以上基础上分析不同单元的沉积环境,建立沉积模式,确定各单元沉积微相组合方法,绘制成平面沉积微相相带图,进而总结其展布规律。形成了一套扶杨油层砂体分布规律的研究方法,对进一步评价长垣中部地区扶杨油层潜力、提交油气后备储量、指导开发试验等提供地质依据,对其他区块同类油层砂体分布描述及规律性分析具有重要借鉴意义。更多还原

【Abstract】 The Quantou Formation of Lower Cretaceous in the Central Part of Daqing placanticline is delta front subfacies. Types of sand body mainly are distributary channel, in which the developing Fuyang reservoir is the advantageous reserve potential reservoir, mainly are located in mid-south of Daqing placanticline. Lateral variation of Sand body Thickness in the area is faster, belonging to low porosity, low permeability reservoirs, channel sand body is not easy to predict and identify, becoming the bottleneck of oilfield exploration and development. The subject carries on a division in Sedimentary Time Units, doing research on the plane origins of the sand and vertical sediment evolution rules, and then distribution rules of reservoirs are researched, which provides technical support for oilfield development.In the paper on the basis of fully researching description method of domestic Fuyang reservoir, comprehensively applying sedimentological theory and principle of sequence stratigraphy, taking coring materials as the foundation, analysing the sedimentary environment of under the great sedimentary background, determing the limits of sedimentary units and correlative marks of Fuyang reservoir, vertically subdivising 57 sedimentary units; using the correlative relationship between lithology and electricity of logging curves, establishing microfacies model of normal log suited for Fuyang reservoir; by means of drawing baseline cyclic profile, finding out sedimentary environment and sedimentary characteristics of Fuyang reservoir. Based on the above, analysing sedimentary characteristics of different units, building sedimentary model, determing combined method of sedimentary microfacies of every unit, drawing facies belt graph of plane sedimentary microfacies, and then summarizing distribution rules. A suit of research methods are formed aimed at distribution rules of sand body of Fuyang reservoir, providing geological basis for further evaluation on the potential of Fuyang reservoir in the Central Part of placanticline, submitting Backing reserve of hydrocarbon, directing development test and so on, having significant reference value for the description and regular analysis of sand body distribution of the same oil layers to other blocks.更多还原