2009-01-012024-05-17https://scholars.lib.ntu.edu.tw/handle/123456789/691074摘要：目前許多世界重要的油氣田的儲油能力與其裂縫的發育及分布有關，儲集層之裂縫 群組評估是世界油藏評估的重要趨勢之一。至目前為止，苗栗地區斷層作用形成的褶皺 構造中裂縫儲集的分佈並不是非常的清楚，在本研究中，我們將針對並探討斷層所形成 的序列背斜構造中的裂縫儲集之幾何分佈，為了能瞭解西部麓山帶逆衝斷塊的運勳和幾 何形狀的改變所造成油氣儲集的演育，我們預計重建數條中台灣至北台灣的西部麓山帶 到海岸平原的平衡剖面；平衡剖面的資料約制來源主要有震測剖面(用來鈎勒出逆衝斷 塊的形貎)、鑽井(用以瞭解逆衝斷塊及其沉積物的厚度)和野外露頭及參照現有的地質 圖。我們使用美國Paradigm Geophysical 公司(Paradigm Geophysical Ltd., Houston, USA) 所出版的GeoSec 2D®來建置平衡剖面。進一步瞭解平均應力梯度趨使油氣儲集變遷的 影響，我們研究有關二維離散元素模型在有關斷層折彎褶皺和斷層擴展褶皺的模擬。經 由GeoSec2D® 和Move 2D (Middle Valley Exploration Ltd., Glasgow, UK)對褶皺從初始至 成熟期各個階斷的演化，並將其轉換為離散元素模型，使其得以分析褶皺發展時的應力 及應變集中的分佈區域。要能推算趨動力和流體移棲之間的關係，必須分析離散元素在 各平衡階段的平均應力分佈；此外，斷層擴展褶皺發展時的同構造沉積亦可由擴展前端 的前翼及後翼的最大平均應力異常來預測。最後，我們將可以用不同的模型來推算裂縫 儲存的分佈。本研究亦將利用Stress Tester軟體，將已建構之地質模型，進行應力分析及 裂縫模擬，預測裂縫之產狀，將應用於碳酸岩儲集層及造山帶背斜構造或基盤之裂縫油 藏評估。<br> Abstract: The fractured reservoir in Mioali area due to the evolution of fault-related folding is unclear. In this study we aim at characterizing the pattern and distribution of fracture reservoir in a series of anticlines forming by faults. In order to determine the geometries and kinematics of the thrust sheets in the western Foothills at the time of oil migration, we will construct several balanced cross-sections from the western Foothills to coastal plain in central and northern Taiwan. Data constrains for balancing is provided by reflection seismic profiles (that imaged thrust sheet geometries), bore holes (that provided thicknesses of thrust sheets and thickness of involved sediments) and outcrop data from available geological maps. Cross-sections were constructed using the program GeoSec 2D® (Paradigm Geophysical Ltd., Houston, USA). In order to understand oil migration driven by mean stress gradients, we study a set of 2-D distinct element model of fault-propagation and fault-bend folds. Model geometries describing different stages of fold development are made by forward balancing from undeformed to most mature folding stages using GeoSec2D and Move 2D (Middle Valley Exploration Ltd., Glasgow, UK). The mechanical properties are estimated by transferring the various balancing stages into the distinct-element, analyzing for stress field perturbations and strain localization during the fold growth. Analysis of the distinct-element modeling results focused on the mean stress distribution in relation to different fold-and-thrust geometries and balancing stages, respectively, in order to assess the driving force for fluid migration. Furthermore, fault-propagation fold scenarios with syn-tectonic deposition will be predicted based on the maximum mean stress anomaly in the advancing side of the propagating ramp tip and the receding side of the propagation ramp tip. Finally the propagation of fracture reservoirs could be assessed in different models. Furthermore, the pattern of fractured reservoir will be reassessed by stress tester software.離散元素法裂縫儲集斷層折彎褶皺斷層擴展褶皺fractured reservoirdiscrete element methodfault-bend foldingfault-propagation顆粒體離散元素法模擬台灣西部麓山帶裂縫儲存之評估(II)