陕北斜坡东部沙家沟区长6油层四性关系研究

发布时间：2018-05-24 16:48

本文选题：沙家沟区 + 中生界　；参考：《西安石油大学》2015年硕士论文

【摘要】：本文从地质特征入手,利用岩心、录井、测井、测试资料,针对沙家沟地区长6储层低孔,低渗的地质特点,对储层岩性与电性、物性与电性、含油性与电性之间的关系进行了深入研究。长6地层岩性主要为灰色细粒长石砂岩,自然电位高负异常,自然伽马值多在60?100API之间,声波平均值为225畔/m?微电极差异幅度大。含油细砂岩一般电阻率较高,油层电阻率大于30am?孔、渗相对较好的储层,自然电位曲线上反映为明显的负异常幅度和较高的声波时差值。研究E较好的储油层声波时差值一般为220?230畔/m?多数油层声波T差值一般为215?230ns/m?长6油层初产均含水,含水率30%?70%,油层电阻率幅度大,深、浅探测幅度差小,含油层的深感应电阻率大致为48?69(2.01,水层深感应电阻率值低,深、浅探测电阻率幅度差大。综合长6储集层的物性和电性特征,建立的研究K有效厚度下限标为:岩性细砂岩以上,含油级别为油浸及以上,渗透率0.2x10_3,2,声波时差220叫/m?电阻率含水饱和度彡58%。
[Abstract]:According to the geological characteristics of Chang 6 reservoir in Shajiagou area, the lithology and electrical property, physical property and electrical property of reservoir are studied in this paper, based on the geological characteristics of core, logging and testing data, and in view of the geological characteristics of Chang 6 reservoir with low porosity and low permeability in Shajiagou area. The relationship between oil content and electrical property was studied. The lithology of Chang 6 strata is mainly gray fine-grained feldspathic sandstone, the natural potential is high negative anomaly, the natural gamma value is between 60?100API, the average acoustic wave is 225m / m? The difference between microelectrode and microelectrode is large. The resistivity of oil-bearing fine sandstone is generally high, and the resistivity of reservoir is more than 30am. In the reservoir with relatively good porosity and permeability, the natural potential curve shows obvious negative anomalous amplitude and high acoustic time difference. The sonic time difference of E better reservoir is generally 220 / 230 / m? The T difference of acoustic waves in most reservoirs is 215ns / m? The formation of Chang 6 oil layer has water content, water cut 30% and 70%. The resistivity amplitude of oil layer is large, deep, and the difference of shallow detection amplitude is small. The depth induction resistivity of oil layer is about 48m 692.01, the depth of water layer is low, and the amplitude of shallow detection resistivity is large. Based on the physical and electrical characteristics of Chang 6 reservoir, the lower limit of effective K thickness of study K is determined as follows: lithologic fine sandstone, oil bearing grade and above, permeability 0.2 x 103 / 2, sonic time difference 220 / m? Resistivity water saturation is 58.
【学位授予单位】：西安石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.13

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