本文選題：儲層　切入點：裂縫　出處：《西安石油大學(xué)》2017年碩士論文

【摘要】：裂縫是影響致密砂巖儲層高產(chǎn)及穩(wěn)產(chǎn)的關(guān)鍵。在對國內(nèi)外該類儲層裂縫研究現(xiàn)狀系統(tǒng)調(diào)研及近期成果全面分析的基礎(chǔ)上,深入分析了裂縫的類型及形成機理[1]。本文通過油藏儲層連通性、井間示蹤劑、干擾試井、水驅(qū)前緣測試等與動態(tài)相結(jié)合的方式對見水方向準(zhǔn)確識別,并對裂縫貫通區(qū)井網(wǎng)加密方法進行了研究。主要結(jié)論如下:(1)研究區(qū)裂縫主要是在燕山期形成的E-W向、S-N向裂縫和喜山期形成的NE向裂縫。現(xiàn)今構(gòu)造應(yīng)力場在盆地內(nèi)部的的最大水平主應(yīng)力方向是北西向,因此,在現(xiàn)今構(gòu)造應(yīng)力場的作用下,最大水平主應(yīng)力方向和北西向的裂縫平行,具有較高的開啟程度。(2)通過對動靜態(tài)裂縫測試技術(shù)(示蹤劑測試、干擾試井、水驅(qū)前緣測試、注水指示曲線測試、吸水剖面測試等),并結(jié)合油田生產(chǎn)動態(tài)及砂體連通情況,判定B209區(qū)高滲帶33條,裂縫28條;B216區(qū)高滲帶11條,裂縫6條;B155區(qū)高滲帶19條,裂縫19條。(3)研究區(qū)裂縫見水受北東-南西向現(xiàn)代應(yīng)力場控制作用明顯;同時裂縫具有一定的相控規(guī)律,水下濁積扇扇中邊部裂縫相對發(fā)育;隨著開發(fā)的進行,在注水過程中應(yīng)力“均一化”,與現(xiàn)代應(yīng)力場共軛方向裂縫容易開啟導(dǎo)致見水。(4)目前井網(wǎng)適應(yīng)性分析表明,各區(qū)塊裂縫與井網(wǎng)基本適配,建議對水淹區(qū),進行局部井網(wǎng)調(diào)整,菱形反九點井網(wǎng)通過變排距的加密井網(wǎng)調(diào)整,五點法井網(wǎng)采用等排距加密線狀注水,并對各區(qū)提出了加密井位的建議。
[Abstract]:Fracture is the key to the high and stable production of tight sandstone reservoir.On the basis of systematic investigation and comprehensive analysis of the current situation of fracture research in this kind of reservoir at home and abroad and comprehensive analysis of recent achievements, the types and formation mechanism of fractures are analyzed in depth [1].In this paper, through the combination of reservoir connectivity, interwell tracer, interference well testing, water drive front test and dynamic test, the direction of water discovery is accurately identified, and the method of infilling well pattern in fracture through area is studied.The main conclusions are as follows: (1) the fractures in the study area are mainly E-W trending S-N fractures formed in the Yanshanian period and NE fractures formed in the Himalayan period.The maximum horizontal principal stress direction of the present tectonic stress field in the basin is NW, therefore, under the action of the present tectonic stress field, the maximum horizontal principal stress direction is parallel to the NW fracture.It has a high degree of opening. It combines the dynamic and static fracture testing technology (tracer test, interference well test, water drive leading edge test, water injection indication curve test, water absorption profile test, etc.) with oilfield production performance and sand body connectivity.33 hypertonic zones in B209 area, 11 hyperosmotic zones in 28 fractures, 19 hypertonic zones in B155 area and 19 fractures in B155 area.At the same time, the fracture has certain phase control law, and the fracture in the middle edge of the turbidite fan is relatively developed, and with the development, the stress is "homogenized" in the process of water injection.The adaptability analysis of well pattern at present shows that the fractures in each block are basically suitable for well pattern, and it is suggested that local well pattern adjustment should be carried out for waterflooded area.The rhombus inverse nine-spot well pattern is adjusted by the infilled well pattern with variable spacing, and the five-point well pattern is infilled with equal spacing infill linear water injection, and the suggestions of infill well location are put forward for each district.
【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】：2017
【分類號】：TE31

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本文編號：1710075