【作者】 孙彤彤；

【导师】 姜在兴；

【作者基本信息】 中国地质大学（北京） ， 矿产普查与勘探， 2009， 博士

【摘要】 葡萄花油层是松辽盆地古龙北地区的主要含油气层,但由于断层分布密集,砂泥岩薄互层储层,砂岩分布及油水分布关系复杂,为油藏评价带来很大困难,在一定程度上制约了油气勘探,开发的进展。因此本论文结合勘探开发的需要,开展关于葡萄花油层的储层综合研究及预测评价。本论文在对古龙北地区葡萄花油层等时格架控制的小层划分对比的基础上,以岩心观察和测井资料为依据,对重点探井进行单井沉积微相分析,建立典型相标志与相层序,建立古龙北地区葡萄花油层典型沉积微相模式。全面分析葡萄花油层的沉积相特征,搞清物源方向、砂体形态、沉积微相展布特征。综合利用己有钻井、测井、测试和分析化验资料对工区葡萄花油层进行岩石物理特征、储层物性与含油性关系进行研究,研究该区薄互层储层预测方法,在地震稀疏脉冲反演的基础上,采用随机反演,结合岩性模拟,孔隙度模拟,电阻率模拟的方法,查明各砂组及单砂体的分布规律,定量或半定量预测重点地区和有利储集层的展布。通过油水分布主控因素分析及油藏类型研究,提出油气富集因素及油水分布规律。本论文得到以下认识及结论:在对该区葡萄花油层进行三分砂层组,八分小层的对比划分基础上,根据沉积相识别标志,选取具有典型特征的井段建立岩—电—相转换模型,葡萄花油层沉积微相类型主要为:水下分流河道、河口坝、远砂坝、分流间湾、席状砂,古龙北地区主要为三角洲-湖泊沉积体系。该项研究为工区的储层分布预测及物性变化、油气藏类型以及油水分布的研究打下良好的基础。建立了该地区薄互层储层预测有效方法及技术流程,认为可采用随机反演,结合岩性模拟,孔隙度模拟,电阻率模拟的方法,定量或半定量预测有利区块有利储层及油层的分布。深入分析独立油藏的空间分布,认为油气藏纵向上的油、水层间互频繁,但遵循高油低水的重力差异聚集规律,而平面上则反映为典型的层状边水油藏特征。古龙北地区油藏类型及分布与砂体的展布和构造背景配置密切相关,不同物源砂体及同一砂体的不同沉积相带导致储层物性的变化,是形成岩性油气藏的主要条件。多物源,不同相带及不同的构造部位影响着油藏的分布。斜坡区主要发育断块岩性油藏和砂岩上倾尖灭型构造岩性油藏;向斜区主要发育水下分流河道被断层截切的断层岩性油藏和砂岩透镜体油藏。研究区储层属低孔、低渗储层,加之构造带的地层倾角相对平缓,油水分异差,形成较高含水饱和度油藏,又因压裂改造产生的垂直缝沟通油层附近的水层,这些是导致古龙北地区油藏油水同出井、层比例较高的直接原因。更多还原

【Abstract】 The Putaohua oil layer is a dominate hydrocarbon zone in the north of Gulong area of Song-liao basin. But the evaluation,exploration and development to Putaohua reservoir were restricted because of the complicated geological conditions (include fault distribution , thin sand shale interbedding and complicated sandstone distribution)and the complicated oil-water distribution. This paper was about the prediction ,evaluation and comprehensive study on Putaohua oil layer meeting the needs of exploration and development .Identification marks and sequence of sedimentary facies and model of micro-faces sedimentation were built in this paper, based on the stratigraphy correlation and thin layer division and contrast to the north of Gulong area.This paper also had an overall analysis to the sedimentation system,facies characteristics, source direction, the sand body reservoir distribution and distributing feature of micro-facies .Comprehensively utilizing cores, logging, well logging and analysis assay data, this paper studied the petrologic characteristics, reservoir property and the relation between reservoir property and oil-bearing characteristics of Putaohua oil layer. This paper studied prediction method for the thin interbeds of sandstone and mud stone. Based on the reservoir simulation, stochastic simulation, lithologic simulation and porosity simulation, this paper revealed single sand body’s distribution, determined and quantitatively calculated the single sand body’boundary of important regions and favorable reservoirs.Base on the studies on the controlling factors and resrvoir types,this paper put forward main hydrocarbon enrichment factors and oil-water distribution laws.Understanding and conclusions:The paper determined the stratigraphic contrast scheme of the top and bottom of Putaohua oil lay. Three small layers were divided to the north of Gulong area and eight small layers were divided to the oil domain and their surround area.Based on the cores, analysis assay data and logging, according to the identification marks of sedimentary facies, this paper established rock-logging-facies transformation model from the typical interval. The sedimentation system of the north of Gulong area is delta-lacustrine depositional system. There are 5 kinds of micro-facies in total: underwater distributary channel, river mouth bars, far bars, inter branch channel and shore-shallow lacustrine sediments, deep and semi-deep lake facies. This study lays a good foundation for the study on the reservoir prediction,physical property changes and reservoir types and distribution.This paper determined reservoir prediction method and technical process of thin sand and shale interbedding in the north of Gulong area. The reservoir prediction can be done by the process of the stochastic simulation, lithologic simulation and porosity simulation. Determine and quantitatively calculated the favorable reservoirs’boundary of important region.Based on the deep analysis of plane and vertical distribution of single reservoir,this paper determines that although oil and water interlayer frequently on vertical formation, oil–gas aggregation follows the regulation of differential gravity action which the oil distributed above the water. The plane reflects the characteristics of edge water drive reservoir.The reservoir types and distribution closely relates to the sand distribution and the structure background. The main conditions forming lithologic reservoir closely relates to the property change of the sand from different source and the sand from different sedimentary faces. Multiple sources and different structures influence the distribution of Putaohua oil layer. Fault block-lithologic reservoir and structure -lithologic reservoir ( sand layer up thinning out) develop in slope area. Sand lens reservoirs and lithologic reservoirs which the underwater distributary channel sand cut by fault develop in syncline area.Low Porosity and low permeability reservoir, relatively flat structure background lead to worse oil-water differentiation and high water cut reservoir. The direct reason of large proportion wells of commingled production of oil and water is that the vertical fractures made by the fracturing treatment communicate the water lays near the oil lays.更多还原