【摘要】：研究區(qū)位于鄂爾多斯盆地陜北斜坡的東南部,區(qū)域構造為一平緩的西傾單斜構造,傾角小于1度,坡降6~8m/km,探區(qū)總面積約1065平方公里。近年來,延長石油集團公司加大勘探力度,在研究區(qū)內及周邊地區(qū)先后發(fā)現(xiàn)了三疊系長6、長8油層,100余口井試油均獲得工業(yè)油流,展示了較大的勘探開發(fā)潛力。但由于前期基礎研究薄弱等因素導致三疊系深層勘探工作進展較慢,特別是富縣西部地區(qū)的基礎地質規(guī)律受前期投入制約,地質認識不清,急需開展基礎地質規(guī)律研究,搞清主要儲層的時空展布規(guī)律,分析油藏成藏主控因素,預測有利含油富集區(qū),為后期開發(fā)尋找有利資源。因此,深入研究本區(qū)延長組主要含油層位長6、長8層沉積砂體的物源方向、巖礦特征,沉積相展布、生儲蓋組合及成藏模式,篩選有利的勘探目標區(qū),指導下步勘探工作,顯得尤為重要。通過綜合應用現(xiàn)代沉積學、經典層序地層學、儲層沉積學、儲層地質學及地質統(tǒng)計學等新理論、新方法,利用鉆井巖心、錄井剖面、測井資料、露頭剖面及相關的巖石薄片、鑄體薄片等測試分析資料,參考相關的區(qū)域地質資料及文獻,從整個沉積盆地的區(qū)域地質背景及其古地理位置著手,采用層序界面識別與層序地層劃分對比、沉積微相分析、儲層孔隙結構特征分析、儲層物性條件分析、儲層評價與預測及地質統(tǒng)計分析等技術方法,對儲層巖礦特征、孔隙類型、物性展布規(guī)律及其控制因素等多方面進行了深入分析。在此基礎上,對主力長6、長8油層的成藏模式及要素進行了研究,篩選并建立了有利勘探目標區(qū)判識標準,最后分小層預測了有利儲層分布目標區(qū),為下步勘探提供良好的科學指導。
[Abstract]:The study area is located in the southeast of northern Shaanxi slope in Ordos Basin. The regional structure is a gentle westerly inclined monoclinal structure with a dip angle of less than 1 degree and a slope of 6 ~ 8 m / km. The total area of the exploration area is about 1065 square kilometers. In recent years, Yanchang Petroleum Group Company has increased its exploration efforts, successively discovered Triassic Chang 6, Chang 8 oil layers and more than 100 wells to obtain industrial oil flow in the study area and its surrounding areas, which shows great potential for exploration and development. However, due to the weakness of the preliminary basic research, the progress of the Triassic deep exploration work is slow, especially the basic geological law in the western part of Fuxian is restricted by the early investment, the geological understanding is not clear, and it is urgent to carry out the basic geological law research. The temporal and spatial distribution of the main reservoirs is clarified, the main controlling factors of reservoir formation are analyzed, the favorable oil-bearing areas are predicted, and favorable resources are found for the later development. Therefore, the main oil-bearing layers of Yanchang formation in this area are studied deeply, such as the source direction, rock and mineral characteristics, sedimentary facies distribution, assemblage, reservoir cap assemblage and reservoir forming model of the main oil-bearing sand bodies of 6 and 8 layers, so as to screen favorable exploration target areas and guide the next exploration work. It is especially important. Through the comprehensive application of modern sedimentology, classical sequence stratigraphy, reservoir sedimentology, reservoir geology and geostatistics and other new theories and new methods, using drilling cores, logging profiles, logging data, outcrop sections and related rock slices, From the regional geological background and paleogeographic location of the whole sedimentary basin, sequence interface identification and sequence stratigraphic division and correlation are used to analyze sedimentary microfacies, according to the test and analysis data of casting thin sheet, referring to the relevant regional geological data and literature, and starting from the regional geological background and paleogeographic location of the whole sedimentary basin. The characteristics of reservoir pore structure, reservoir physical condition analysis, reservoir evaluation and prediction, geological statistical analysis and other technical methods, the reservoir rock and mineral characteristics, pore types, physical distribution law and control factors are deeply analyzed. On this basis, the reservoir forming model and elements of the main Chang 6 and Chang 8 reservoirs are studied, and the criteria for identifying favorable exploration target areas are selected and established. Finally, the favorable reservoir distribution target areas are predicted by sublayers. To provide good scientific guidance for the next step of exploration.
【學位授予單位】：長安大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：P618.13

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