【作者】 边会媛；

【导师】 潘保芝；

【作者基本信息】 吉林大学 ， 地球探测与信息技术， 2012， 硕士

【摘要】 在全球很多大的油气田，从砂岩薄层里开发出了相当数量的油气。根据前人估算，砂泥岩的薄储层以及岩性裂缝型储层中的油气含量大约能占到全球储量的百分之三十。上述两种地层的电阻率在宏观上均表现各向异性，即在纵向上和横向上所测的电阻率是不相等的。然而常规的感应测井所反映出来的视电阻率是地层的横向的电阻率，利用它来计算地层的含油气饱和度，会出现低估的现象，这样就会造成漏掉含油气的储层的结果。为了解决砂泥岩薄互层评价和解释这一难题，发展了向量感应测井仪器，它的出现带动地层电阻率各向异性飞快发展，但是由于技术、成本等诸多原因，国内各大油田应用的三分量感应测井仍然很少，砂泥岩薄互层的评价还是以常规的测井系列及普通成像、阵列侧向电阻率、阵列感应电阻率等测井方法为主。苏里格北部的砂泥岩薄互层发育，针对常规测井难以评价砂泥岩薄储层、没有三分量感应测井的情况，本文是在示范工程编号为2008ZX05044的国家科技重大专项《大型油气田及煤层气开发》中的《鄂尔多斯盆地大型岩性地层油气藏勘探开发示范工程》的分支《低渗低阻气层测井定量解释与成岩相分析技术》和长庆油田测井采集及评价技术“十二五”发展规划的分支《致密气层测井解释标准与可动流体评价》的联合资助下，运用井眼微电阻率成像测井（FMI）与已有的常规测井、阵列侧向、阵列感应电阻率测井结合，提出了砂泥岩薄互层各向异性及薄储层综合评价方法。首先对苏里格北部砂泥岩薄互层的电学性质以及测井响应进行分析，然后对已有的薄砂岩储层的电阻率各向异性评价模型进行分析。本文基于Mollison模型在无三分量感应测井的情况下，利用微电阻率成像测井的分辨率高的特点，建立了电阻率各向异性模型，分布计算出泥岩的纵向、横向电阻率R_shv、R_shh。利用FMI数据分别与常规侧向测井数据、阵列侧向测井数据以及阵列感应测井数据结合，通过垂向电阻率R_v和横向电阻率R_h获得薄砂岩层的电阻率Rs d，给出了砂泥岩薄互层各向异性的评价方法。为薄砂岩储层进行各向异性评价打下了良好的基础。在地层的各向异性特征及计算得到薄砂岩层的真实电阻率的基础上，应用自然伽马、自然电位结合计算地层的总泥质含量，应用FMI计算层状泥质含量，再根据Thomas-Stieber交会图计算出不含分散泥质的纯砂岩层的有效孔隙度。这样，在阿尔奇公式的基础之上采用R_sd就得到了真实薄储层的含水饱和度，从而提高了储层孔隙度、饱和度的评价精度利用实际地区的岩心的孔渗关系来进行渗透率评价。本文应用图版法（包括声波与电阻率交会图图版、中子与电阻率交会图图版）、中子密度结合法、纵波的等效弹性模量差比法以及各向异性系数法进行流体性质识别。上述方法在苏里格北部获得了良好的应用。更多还原

【Abstract】 A considerable amount of oil and gas from thin sandstone layer had been developed frommany large oil and gas fields in the world, According to previous estimated, about30percent ofglobal reserves occurrence in thin sandstone layer and fractured lithology reservoirs, Theresistivity of the two strata showed macroscopic anisotropy, That is, on horizontal and verticalorientation the resistivity are different. However, the resistivity which conventional inductionlogging measured is formation transverse resistivity,when using it to calculate the formationhydrocarbon saturation will be underestimated, this will result in missed petroleum reservoir. Inorder to solve the problem of sandstone thin interbedded and mudstone evaluation andexplanation, developed vector induction logging instrument, and the instrument drived formationresistivity anisotropy fast development, Due to technical, cost, and many other reasons, theapplication of three-component induction logging in domestic major oil field is still very small,sandstone thin interbedded and mudstone evaluation and explanation mainly use conventionallogging suite and array resistivity array induction resistivity well logging methods.In Changqing oilfield, sandstone and mudstone thin interbed development, Conventionallogging is difficult to evaluate sandstone and mudstone thin interbed, And not havethree-component induction logging, In this paper, combined FMI and conventional logging, thearray lateral array induction resistivity log，developed a method to evaluation sandstone andmudstone thin interbed Anisotropic and Reservoir Characteristics.First, analyze electrical properties and logging response of sandstone and mudstone thininterbed, Then analyze the existing thin sandstone reservoirs resistivity anisotropy evaluationmodel, This paper based on the Mollison model,under the Situation of no multi-componentinduction logging instrument, Uing FMI high resolution, Established Resistivity anisotropymodel. Calculate the horizontal resistivity and vertical resistivity separately, Using FMI data,separately Combined with conventional lateral logging data,array lateral logging data and arrayinduction logging data, We can obtain the resistivity of thin sand reservoir through verticalresistivity and horizontal resistivity and put forward the evaluation methodology of anisotropy inthin interbed sand-mudstone layer, which is the base of evaluation of anisotropy in thin sandreservoir. Based on the anisotropy of reservoir and the real resistivity that is calculated in thinsand reservoir. Basing on the anisotropy of reservoir and the real resistivity that is calculated in thin sandreservoir,Using GR and SP calculate formation total shale content, using FMI calculatelaminated shale content, then using Thomas-Stieber cross plot calculate effective porosity of puresandstone without dispersed shale. In this way, we can get a real reservoir water saturationbasised on Archie’s equation, then to improve porosity, saturation evaluation accuracy, using coreporosity and permeability relationship of actual area to evaluation permeability.In this paper, using plot method(Including acoustic and resistivity crossplot plates, neutronand resistivity crossplot Plate), Neutron-density combined method, P wave elastic modulusdifferential ratio method, and Anisotropy coefficient method to identify fluid properties.The above method has a good application in north Sulige.更多还原