現河莊地區(qū)河146斷塊沙三中亞段儲層地質研究
發(fā)布時間：2019-01-06 08:17
【摘要】：現河莊地區(qū)河146斷塊沙三中亞段沉積的濁積扇儲層為中孔低滲透儲層,具有儲層非均質性強,剩余油分布規(guī)律復雜的特征。由于地質情況認識不清楚,隨著油田開發(fā)的進行,開發(fā)矛盾開始凸顯,制約著油田后期的開發(fā)調整,因此需要開展儲層地質研究,為后期開發(fā)調整提供指導和參考依據。本文首先在區(qū)域沉積背景的基礎上,以層序地層學為指導,建立研究區(qū)的地層格架。然后,根據巖心、測井、地震以及開發(fā)動態(tài)資料,全面考慮構造、沉積特征以及油水關系等多種因素,在標志層的控制下,采用“旋回對比、分級控制”的方法,進行精細的地層對比,將沙三中亞段所鉆遇的地層劃分為5個砂層組,64個小層,建立了等時地層格架。根據以上的工作,進行主力小層的沉積微相及其平面展布以及縱向上的沉積演化研究,總結出沉積模式。最后在沉積相研究的基礎上,研究工區(qū)內濁積扇砂體的儲層構型特征及其開發(fā)響應,其中著重研究濁積水道砂體的構型及開發(fā)響應特征,最后選取兩個具有代表性的解剖區(qū)進行對比,探討構型對剩余油的影響。研究表明研究層段可以劃分出湖泊低水位體系域、湖泊水侵體系域和高水位體系域,沉積相主要為供給水道型濁積扇和無根型滑塌濁積扇,其中4砂層組主要發(fā)育濁積水道,1-3砂層組發(fā)育無根型滑塌濁積扇,其具有數量多、個體小,縱向上多期疊加的特征,濁積砂體的分布主要受古地形、斷層、湖平面以及沉積物供應共同控制。單純通過測井曲線得出的兩套看似連通的砂體,在生產開發(fā)的過程中往往發(fā)現其實際上并非連通,因此本文將地質和開發(fā)數據結合,研究儲層的構型特征,根據研究區(qū)內濁積砂體的連通關系及開發(fā)響應,將濁積水道砂體的連通關系總結為濁積水道主體連通型(下切疊加型)、分支濁積水道砂體不連通型以及濁積水道主體-邊緣連通型(弱下切疊加-接觸型)三類。單一水道構型特征與井網的匹配關系是剩余油的主要影響因素,后期完善注采井網時,油、水井延單一水道延伸方向調整布置,同時還需考慮砂體的連通關系,這樣利于提高采收率。
[Abstract]:The turbidite fan reservoir in the middle part of the third member of He146 fault block in Xianhezhuang area is a middle porosity and low permeability reservoir with strong heterogeneity and complicated remaining oil distribution law. Because the geological condition is not clear, with the development of the oilfield, the contradiction of development begins to become prominent, which restricts the adjustment of the later development of the oilfield, so it is necessary to carry out reservoir geological research to provide guidance and reference for the adjustment of the later development. In this paper, based on the regional sedimentary background, the stratigraphic framework of the study area is established under the guidance of sequence stratigraphy. Then, according to the core, logging, seismic and development dynamic data, and taking into account various factors, such as structure, sedimentary characteristics and oil-water relationship, under the control of marker layer, the method of "cycle contrast, grading control" is adopted. According to the fine stratigraphic correlation, the strata in the middle part of Sha 3 are divided into 5 sand formations and 64 sub-layers, and the isochronous stratigraphic framework is established. According to the above work, the sedimentary microfacies and their plane distribution of the main layer and the sedimentary evolution in the longitudinal direction are studied, and the sedimentary model is summarized. Finally, based on the study of sedimentary facies, the reservoir configuration and development response of turbidite fan sand body in the working area are studied, especially the configuration and development response of turbidite sand body. Finally, two representative anatomical regions were selected for comparison to investigate the effect of configuration on residual oil. The study shows that the study layer can be divided into lake low water level system tract, lake water invasion system tract and high water level system tract. The sedimentary facies are mainly supply channel turbidite fan and rootless sloughing turbidite fan. There is no root sloughing turbidite fan in 1-3 sand formation, which has the characteristics of large number, small individual and superposition in longitudinal direction. The distribution of turbidite sand body is mainly controlled by paleotopography, fault, lake level and sediment supply. Two sets of seemingly connected sand bodies obtained from log curves are often found to be not connected in the process of production and development. Therefore, the geological and development data are combined in this paper to study the structural characteristics of reservoirs. According to the connection relation and development response of turbidite sand body in the study area, the connection relation of turbidite channel sand body is summarized as the main connected type of turbidite channel (incised superposition type). There are three types of sand body disconnection in branched turbidite channel and three types: main body and edge connected type (weak undercut superposition-contact type). The matching relationship between the configuration characteristics of single waterway and well pattern is the main influencing factor of remaining oil. When the injection-production pattern is improved, the extension direction of oil and wells along a single waterway should be adjusted and the connection of sand body should be considered. This is conducive to increasing oil recovery.
【學位授予單位】：中國石油大學(華東)
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：P618.13
本文編號：2402568
[Abstract]:The turbidite fan reservoir in the middle part of the third member of He146 fault block in Xianhezhuang area is a middle porosity and low permeability reservoir with strong heterogeneity and complicated remaining oil distribution law. Because the geological condition is not clear, with the development of the oilfield, the contradiction of development begins to become prominent, which restricts the adjustment of the later development of the oilfield, so it is necessary to carry out reservoir geological research to provide guidance and reference for the adjustment of the later development. In this paper, based on the regional sedimentary background, the stratigraphic framework of the study area is established under the guidance of sequence stratigraphy. Then, according to the core, logging, seismic and development dynamic data, and taking into account various factors, such as structure, sedimentary characteristics and oil-water relationship, under the control of marker layer, the method of "cycle contrast, grading control" is adopted. According to the fine stratigraphic correlation, the strata in the middle part of Sha 3 are divided into 5 sand formations and 64 sub-layers, and the isochronous stratigraphic framework is established. According to the above work, the sedimentary microfacies and their plane distribution of the main layer and the sedimentary evolution in the longitudinal direction are studied, and the sedimentary model is summarized. Finally, based on the study of sedimentary facies, the reservoir configuration and development response of turbidite fan sand body in the working area are studied, especially the configuration and development response of turbidite sand body. Finally, two representative anatomical regions were selected for comparison to investigate the effect of configuration on residual oil. The study shows that the study layer can be divided into lake low water level system tract, lake water invasion system tract and high water level system tract. The sedimentary facies are mainly supply channel turbidite fan and rootless sloughing turbidite fan. There is no root sloughing turbidite fan in 1-3 sand formation, which has the characteristics of large number, small individual and superposition in longitudinal direction. The distribution of turbidite sand body is mainly controlled by paleotopography, fault, lake level and sediment supply. Two sets of seemingly connected sand bodies obtained from log curves are often found to be not connected in the process of production and development. Therefore, the geological and development data are combined in this paper to study the structural characteristics of reservoirs. According to the connection relation and development response of turbidite sand body in the study area, the connection relation of turbidite channel sand body is summarized as the main connected type of turbidite channel (incised superposition type). There are three types of sand body disconnection in branched turbidite channel and three types: main body and edge connected type (weak undercut superposition-contact type). The matching relationship between the configuration characteristics of single waterway and well pattern is the main influencing factor of remaining oil. When the injection-production pattern is improved, the extension direction of oil and wells along a single waterway should be adjusted and the connection of sand body should be considered. This is conducive to increasing oil recovery.
【學位授予單位】：中國石油大學(華東)
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：P618.13
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