稀疏脉冲反演在东营凹陷坨163井区沙三段储层预测中的应用

采取层序地层学理论与测井约束反演相结合的方法,对东营凹陷坨163井区沙三段的砂体分布进行了预测.研究结果表明,坨163井区沙三段主要发育沙三段下亚段浊积扇沉积体系和沙三段中亚段、沙三段上亚段的扇三角洲沉积体系;沙三段下亚段沉积时期研究区的东部和南部发育多个浊积扇体,最大的一个位于坨710砂体附近,沙三段中亚段沉积时期在坨717-坨718和坨710井区附近发育2个较大的扇三角洲;运用稀疏脉冲反演软件Ja-son对该区储层进行了反演,并运用三维可视化技术等方法,预测了坨710、坨718、坨717、坨714和坨163等5个有利砂体.     

济阳坳陷西部馆陶组浅水辫状河三角洲沉积

通过对砂体平面展布形态、岩性和岩相组合、泥岩及砂岩的颜色、测井曲线形态及沉积背景的研究,证实了济阳坳陷西部馆陶组发育浅水条件下的辫状河三角洲沉积,而不是陆上的河流相沉积.临盘油田大卢家地区馆三段主要发育浅水辫状河三角洲前缘亚相,并细分为水下辫状河道、河道间、前缘席状砂3种沉积微相.     

Control of facies/potential on hydrocarbon accumulation： a geological model for lacustrine rift basins

The formation and distribution of hydrocarbon accumulations are jointly controlled by ＂stratigraphic facies＂ and ＂fluid potential＂, which can be abbreviated in ＂control of facies/potential on hydrocarbon accumulation＂. Facies and potential control the time-space distribution of hydrocarbon accumulation macroscopically and the petroliferous characteristics of hydrocarbon accumulation microscopically. Tectonic facies and sedimentary facies control the time-space distribution. Lithofacies and petrophysical facies control the petroliferous characteristics. Favorable facies and high porosity and permeability control hydrocarbon accumulation in the lacustrine rift basins in China. Fluid potential is represented by the work required, which comprises the work against gravity, pressure, interfacial energy and kinetic energy. Hydrocarbon migration and accumulation are controlled by the joint action of multiple driving forces, and are characterized by accumulation in the area of low potential. At the structural high, low geopotential energy caused by buoyancy control anticlinal reservoir. The formation oflithological oil pool is controlled by low interfacial energy caused by capillary force. Low compressive energy caused by overpressure and faulting activity control the formation of the faulted- block reservoir. Low geopotential energy of the basin margin caused by buoyancy control stratigraphic reservoir. The statistics of a large number of oil reservoirs show that favorable facies and low potential control hydrocarbon accumulation in the rift basin, where over 85% of the discovered hydrocarbon accumulations are distributed in the trap with favorable facies and low potentials. The case study showed that the prediction of favorable areas by application of the near source-favorable facies-low potential accumulation model correlated well with over 90% of the discovered oil pools＇ distribution of the middle section of the third member of the Shahejie Formation in the Dongying Depression, Bohai Bay Basin.     

东营凹陷盐222块沙四段上亚段有效储层识别

针对东营凹陷盐222块砂砾岩岩性复杂，非均质性强，岩石骨架对测井曲线的影响比常规砂岩储层突出的特点，在综合利用岩心、录井和常规测井资料的基础上，分析了盐222块沙四段上亚段的储层特征，建立了有效储层的判断标准，并对砂砾岩的有效储层进行了划分。研究结果表明，东营凹陷盐222块有效储层的物性标准为：岩性标准为含砾砂岩以下（包括含砾砂岩、细砂岩），含油性标准为油斑级以上（包括油斑），孔隙度大于等于6％，渗透率大于等于0．85×10^-3μm^2；有效储层的电性标准为：声波时差大于等于197μs／m，补偿密度小于等于2．57g／cm^3，深侧向电阻率大于等于15Ω·m。据此标准，对盐222块21口井341个层进行了有效储层的判断，有效储层即油层为313个，其中非油层转油层为50个，二次解释的结论与试油结果具有良好的对应性。     

Differential functioning of the Beck Depression inventory in late-life patients: Use of item response theory.

The present analyses examined age-related measurement bias in responses to items on the revised Beck Depression Inventory (BDI) in depressed late-life patients versus midlife patients. Item response theory (IRT) models were used to equate the scale and to differentiate true-group differences from bias in measurement in the 2 samples. Baseline BDI data (218 late life and 613 midlife) were used for the present analysis. IRT results indicated that late-life patients tended to report fewer cognitive symptoms, especially at low to average levels of depression. Conversely, they tended to report more somatic symptoms, especially at higher levels of depression. Adjusted cutoff scores in the late-life group are provided, and possible reasons for age-related differences in the performance of the BDI are discussed. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

济阳坳陷东营凹陷南斜坡高蜡原油高分子量烃类分布及高蜡成因

运用高温气相色谱技术及双质谱技术对济阳坳陷东营凹陷高蜡原油的高分子量烃类的组成、分布特征及非常规的生物标志物进行了研究。高温气相色谱分析结果表明,王古1井奥陶系高蜡原油与古近系孔店组高蜡原油具有相同的油气来源,但成熟度高于孔店组原油。双质谱技术分析表明,研究区高蜡原油中含有丰富的C₂₆和24-降胆甾烷,从而区别于本区来源于古近系沙河街组四段上亚段烃源岩的正常原油,这为藻类生源提供了重要证据。除陆源植物外,藻类等低等水生生物也是本区高蜡原油形成的重要母质;微生物改造是研究区高蜡原油形成的一个重要因素;在一定的成熟度范围内,相对较高的成熟度影响原油含蜡量的高低。     

黄骅坳陷南区油气分布规律及其成藏机制

从渤海湾盆地黄骅坳陷南区油气聚集特征出发,通过研究其成藏条件及主干断层各时期的发育特点,系统分析了油源断层对油气聚集的作用机理.研究认为,长期发育的油源断裂及主伸展层中的次级断层活跃期的"地震泵"作用是黄骅坳陷南区油气聚集的主要成藏动力."地震泵"源控制油气的平面分布位置,而"地震泵"源及主伸展层产生的"次级地震泵"源则联合控制油气运聚层位.地震泵作用区附近的储集层及圈闭是最有效的油气聚集部位,孔二段油藏主要分布于孔西断层西南部尾端、孔西及风化店断层中部断距骤减处、孔东断层两端断距及走向发生突变处等,孔一段上段为主伸展层,聚集了大量的油气.图5表1参25     

洪泽凹陷管镇次凹断裂发育与油气成藏

管镇次凹的断裂非常发育,这些断裂主要形成于早第三纪,断裂剖面形态以铲式正断层和非旋转平面式正断层为主,断裂剖面组合形态以"Y"字型和多米诺式组合为主。这些断裂以伸展构造样式为主,具体主要有以下3种,分别是与边界铲式正断层相关的断阶,掀斜断块和斜坡上的堑-垒组合。这些断裂对工区内的油气运聚有较大影响。表现为边界断裂对储集相带分布的控制作用、断裂对构造圈闭形成具有控制作用和断裂对油气运移的控制作用;此外,断裂对油气的侧向运移具有封堵作用,促进油气成藏。     

东营凹陷南部缓坡带沙四段滩坝砂储层分布及成藏主控因素

沙四段滩坝砂岩油气藏是东营凹陷南部缓坡带油气勘探的重要类型之一,由于滩坝砂储层分布复杂、油气成藏规律不清,长期以来制约着勘探工作的深入.通过高分辨率层序地层学以及沉积动力学分析,对东营凹陷南部缓坡带沙四段滩坝砂储层分布进行了综合研究,确定了储层分布规律及控制因素;通过典型油气藏解剖和输导体系研究,明确了滩坝砂体油气成藏控制因素.研究结果表明:古地形与浪基面控制了滩坝砂发育范围,古水动力控制了滩坝砂的相分异,基准面的升降变化控制了滩坝砂的叠置样式.油源是滩坝砂油气成藏的基础,断裂输导和异常压力是滩坝砂油气富集成藏的必要条件.     

东濮凹陷南部地区深层气藏盖层主要特征研究

本文在对该区盖层室内试验的基础上,分析了盖层的主要物性特征—突破压力,研究了突破压力随地区、层位和埋藏深度的不同变化规律,对盖层突破压力进行了综合评价,定量研究了该区盖层突破压力的平面变化规律,为该区寻找有效的天然气藏提供了必不可少的基础研究资料。