【作者】 罗水亮；

【导师】 林承焰；

【作者基本信息】 中国石油大学 ， 地质资源与地质工程， 2009， 博士

【摘要】 针对研究区构造断层复杂,沉积相变化快,非均质性强,油水关系复杂,岩心实验资料少的特点以及油藏数值模拟难以拟合从而导致的数值模拟错误或精确不够的特点,利用测井资料求取单井剩余油饱和度及储量丰度,并结合地质、地震、以及油藏工程等开发资料,综合判断剩余油富集的潜力区,为油田的开发挖潜提供有力的保证,并为相似条件下的油藏开发提供有力的借鉴。综合应用地震、地质、钻井、测井等资料,采用“标准层控制、旋回对比”的方法,由点(标准井)到线(对比剖面)、再由线到面(对比剖面骨架网及全区各井)对工区78口井进行小层细分对比,建立了地层格架模型。利用地震瞬时振幅、瞬时频率属性从平面及空间对扇体的展布进行识别,利用测井GR曲线的小波变换图谱对目标层段垂向上进行研究。研究认为毕家地区沙三下总体上为退积式扇三角洲,四个砂层组垂向上确定为四期扇三角洲沉积。总结了毕家地区沙三下亚段陡坡扇三角洲沉积模式以及湖泊不断扩张沉积演化特征,并指出了古地形和边界同生断层是研究区扇三角洲形成的重要条件。通过对油藏构造特征研究认为毕家地区主体构造为北北东走向、向南南西倾伏的鼻状构造,其东翼较陡、西翼较缓。对全区微构造进行了识别。以取芯井岩芯分析为基础,分区分沉积相带分岩性分别建立了砾岩及含砾砂岩-砂岩孔隙度、渗透率、含油饱和度测井解释模型。对储层非均质性进行了分析,认为储层总体上,为中高孔中渗储层,砂体连通性差,非均质性强。利用水淹层测井解释方法、核磁共振测井、C/O测井解释方法、产液剖面法、产量匹分法、相对渗透率曲线法、渗饱-水驱曲线法、水驱特征曲线法等测井及油藏工程的方法对单井的剩余油饱和度、剩余储量丰度进行求取。综合利用K-均值算法对影响剩余油潜力的有效厚度、孔隙度、剩余油饱和度、沉积微相、构造条件、储层非均质性、砂体位置、以及与开发条件有关的井射孔完善程度、井网注采对应程度等主要因素进行综合定量评价。对毕家地区储层剩余油分布定量研究结果表明:水下分流河道沉积微相、正向微构造条件、强非均质性、砂体位置处边缘、井射孔不完善、井网注采不对应等都是剩余油富集的有利区带。总结了研究区的剩余油分布规律和分布模式。更多还原

【Abstract】 Well logging interpretation was used to evaluate single well remaining oil saturation and remaining reserves abundance in view of distinguishing feature of researched region such as complex structure, quickly variable sedimentary facies, strong aeolotropy, complex hydrocarbon water contact, little core testing data, inlet well close to fault and containing water and press difficult to match that would cause false or inaccuracy numerical modeling result. Remaining oil concentration potentiali- ty was found according to comprehensive analysis combing regional geology,seismic,logging and core analysis data, which provide strong guaranty for oil field development and good example for similar oil field.Layer was carefully compared and multianalzed according to the rule that marker formation controlling and cycle comparing under the dirrect of sequence stratigraphy, sedimentology, petroleum geology, and combining using regional geology,seismic,logging and core analysis data.Fan body was recognized from plane and interspace according to using seismic instantaneous amplitude, instantaneous frequency and instantaneous phase properties. vertical-variability was also recognized according to using the means wavelet alternation of GR well logging. The result indicate it was retrograding sequence in member III at Shahejie formation in Binnan oilfield Bijia block, and four sand layer group can be separated into four delta fan deposition. The vertical sequence of fan-delta front sand and turbidite is established, the sedimentation model of actic region fan-delta and sedimentation evolution characteristics which lake enlarges continuously are also established. At the same time the research indicates that old topography and border contemporaneous fault are most important elements which fan-delta is buildup.Structure feature of in Binnan oilfield Bijia block was nose like structure which was North North East aligement, South South West pitch, steep eastern limb and soft western limb. Microtectonics in Binnan oilfield Bijia block also recognized.Based on cores analyses of coring well, the four properties relationships(i.e., lithology, physical property, conductivity and oil bearing)between conglomerate and glutenite formation were studied; The logging interpretation models of porosity, permeability and oil saturation in conglomerate and glutenite reservoirs with different lithologies were set up. The aeolotropy of reservoir was also analyzed, result indicated that reservoir was belong to high porosity and moderate permeability, lower sand body connectivity, strong aeolotropy.Single well remaining oil saturation was evaluated according to using water flooded layer well logging interpretation, C/O well logging interpretation, produced fluid profile, outcome matching means, effective permeability curve means, saturation and permeability combining water drive curve means, water drive characteristic curve means and reservoir engineering means. Some elements affect remaining oil distribution such as effective thickness, porosity, remaining oil saturation, sedimentation microfacies, structure condition, reservoir aeolotropy, sand body position, well perforation completeness level and injector producer pair level were comprehensive researched using K-means. Many static state heterogeneous factors which controlling remaining oil, such as microtectonics, sedimentation microfacies, physical property heterogeneity, fluid property and many development heterogeneous factors such as the well-net adaptability, coning of oil well, the completeness of water flooding regime were studied. The result indicated some elements such as underwater distributary channel sedimentation microfacies, forward direction microtectonics, strong aeolotropy, sand body boundary position, incomplete well perforation and poor injector producer pair were good for remaining oil to distribute.更多还原