陜北斜坡東部沙家溝區(qū)長6油層四性關(guān)系研究
本文選題:沙家溝區(qū) + 中生界。 參考:《西安石油大學(xué)》2015年碩士論文
【摘要】:本文從地質(zhì)特征入手,利用巖心、錄井、測井、測試資料,針對沙家溝地區(qū)長6儲層低孔,低滲的地質(zhì)特點(diǎn),對儲層巖性與電性、物性與電性、含油性與電性之間的關(guān)系進(jìn)行了深入研究。長6地層巖性主要為灰色細(xì)粒長石砂巖,自然電位高負(fù)異常,自然伽馬值多在60?100API之間,聲波平均值為225畔/m?微電極差異幅度大。含油細(xì)砂巖一般電阻率較高,油層電阻率大于30am?孔、滲相對較好的儲層,自然電位曲線上反映為明顯的負(fù)異常幅度和較高的聲波時差值。研究E較好的儲油層聲波時差值一般為220?230畔/m?多數(shù)油層聲波T差值一般為215?230ns/m?長6油層初產(chǎn)均含水,含水率30%?70%,油層電阻率幅度大,深、淺探測幅度差小,含油層的深感應(yīng)電阻率大致為48?69(2.01,水層深感應(yīng)電阻率值低,深、淺探測電阻率幅度差大。綜合長6儲集層的物性和電性特征,建立的研究K有效厚度下限標(biāo)為:巖性細(xì)砂巖以上,含油級別為油浸及以上,滲透率0.2x10_3,2,聲波時差220叫/m?電阻率含水飽和度彡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.
【學(xué)位授予單位】:西安石油大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2015
【分類號】:P618.13
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