【摘要】：本文以高分辨率層序地層學(xué)、沉積學(xué)理論為指導(dǎo),綜合應(yīng)用鉆井巖心、錄井、地震、測(cè)井等資料進(jìn)行高分辨率地層學(xué)研究,并以區(qū)域沉積模式為指導(dǎo),對(duì)沉積微相類型及分布規(guī)律進(jìn)行識(shí)別,分析儲(chǔ)層的平面、層內(nèi)與層間的分布與非均質(zhì)特征,為今后油田的下一步開發(fā)以及各項(xiàng)研究打了下堅(jiān)實(shí)的基礎(chǔ)。研究結(jié)果表明:(1)通過(guò)巖心、測(cè)井、地震等資料的綜合分析,識(shí)別出Abu Gabra組頂與Bentiu組頂區(qū)域不整合面,對(duì)應(yīng)Abu Sufyan凹陷第一裂陷期的超長(zhǎng)期旋回,并在Abu Gabra組識(shí)別出兩個(gè)沉積作用轉(zhuǎn)換面和一個(gè)最大湖泛面,分為3個(gè)長(zhǎng)期基準(zhǔn)面旋回,從下到上依次為AG3旋回、AG2旋回和AG1旋回;16個(gè)中期基準(zhǔn)面旋回,45個(gè)短期旋回,并且建立了Abu Sufyan凹陷Abu Gabra組高分辨率層序地層格架。(2)根據(jù)局部標(biāo)志層和旋回特征,進(jìn)一步將AbuGarba組劃分為分流河道、決口扇、分流間灣、濱淺湖泥、水下分流河道、水下分流間灣和河口壩微相。對(duì)測(cè)井?dāng)?shù)據(jù)進(jìn)行分析,建立測(cè)井相識(shí)別模式,并利用主成分分析法總結(jié)出可用于Abu Sufyan凹陷單井沉積微相識(shí)別模板,Abu Gabra組為小型三角洲,。(3)通過(guò)對(duì)沉積微相分布的分析,確定Abu Sufyan凹陷沉積模式,并編制優(yōu)勢(shì)儲(chǔ)層沉積微相平面分布圖,系統(tǒng)的分析了本區(qū)域沉積微相的分布。Abu Gabra組沉積時(shí)期湖平面經(jīng)歷擴(kuò)張-收縮變化,其中AG2砂巖組沉積時(shí)期湖面擴(kuò)張,三角洲呈退積,AG1砂巖組沉積時(shí)期湖面收縮,三角洲以進(jìn)積為主。(4)對(duì)Abu Gabra組地層優(yōu)勢(shì)儲(chǔ)層進(jìn)行儲(chǔ)層性質(zhì)研究,進(jìn)而對(duì)儲(chǔ)層的平面及縱向非均質(zhì)性進(jìn)行了詳細(xì)分析,Abu Gabra組儲(chǔ)層含油層位主要分布在AG1d-1~AG2d-2小層,平面具有強(qiáng)非均質(zhì)性,滲透率變異系數(shù)大于0.7、突進(jìn)系數(shù)大于3。層間突進(jìn)系數(shù)均小于3,變異系數(shù)小于0.7,層間非均質(zhì)弱。
[Abstract]:Guided by high-resolution sequence stratigraphy and sedimentology theory, this paper comprehensively applies drilling core, logging, seismic and logging data to carry out high-resolution stratigraphic research, and identifies sedimentary microfacies types and distribution rules under the guidance of regional sedimentary patterns, and analyzes reservoir plane, intra-layer and inter-layer distribution and heterogeneity characteristics. The results show that: (1) Through the comprehensive analysis of core, logging and seismic data, the unconformity surface between the top of Abu Gabra formation and the top of Bentiu formation is identified, which corresponds to the ultra-long-term cycle of the first rift period in Abu Sufyan sag, and two subsidences are identified in Abu Gabra formation. There are three long-term base-level cycles, AG3, AG2 and AG1, 16 medium-term base-level cycles and 45 short-term cycles, and the high-resolution sequence stratigraphic framework of Abu Gabra Formation in Abu Sufyan sag is established. (2) According to the characteristics of local marker and cycle, the high-resolution sequence stratigraphic framework of Abu Gabra Formation in Abu Sufyan sag will be further developed. Abu Garba Formation is divided into distributary channel, crevasse fan, distributary bay, shore-shallow lake mud, underwater distributary channel, underwater distributary Bay and estuary bar microfacies. Logging data are analyzed, logging facies recognition model is established, and single-well sedimentary microfacies identification template for Abu Sufyan sag is summarized by principal component analysis. Abu Gabra Formation is a small three-well. (3) By analyzing the distribution of sedimentary microfacies, the sedimentary model of Abu Sufyan depression is determined, and the planar distribution map of dominant reservoir sedimentary microfacies is compiled. The distribution of sedimentary microfacies in this area is systematically analyzed. (4) Reservoir properties of Abu Gabra formation are studied, and then the horizontal and vertical heterogeneity of the reservoir are analyzed in detail. The oil-bearing layers of Abu Gabra formation are mainly distributed in AG1d-1~AG2d-2 small layers, with strong heterogeneity in the plane and variable permeability. The coefficient of difference is greater than 0.7 and the coefficient of inrush is greater than 3. The coefficients of interlayer inrush are less than 3, the coefficient of variation is less than 0.7, and the interlayer heterogeneity is weak.
【學(xué)位授予單位】：東北石油大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：P618.13
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本文編號(hào)：2194309