【摘要】：陸西凹陷是遼河外圍盆地勘探程度最高、勘探效果最好的凹陷,隨著勘探的不斷深入,勘探難度越來越大,構(gòu)造油氣藏在本世紀八十年代幾乎都已經(jīng)被發(fā)現(xiàn),目前該區(qū)勘探開發(fā)的重點主要是尋找構(gòu)造巖性油氣藏或巖性油氣藏,五十家子廟洼陷及周邊地區(qū)勘探程度相對較低,而且是典型的巖性油氣藏發(fā)育區(qū),在近幾年勘探中也取得了重大突破。然而在進一步研究過程中遇到諸多困難,首先是九佛堂組上段單層砂體薄,多為2～12m,依托地震資料為主的常規(guī)波阻抗反演識別薄儲層難度很大;另外這一地區(qū)九佛堂組下段普遍發(fā)育凝灰質(zhì)砂巖、局部地區(qū)還發(fā)育火山碎屑巖等特殊巖性,使之識別有利巖性及開展裂縫預(yù)測難度很大。針對上述的問題,本次研究充分利用現(xiàn)有資料對該地區(qū)進行了精細構(gòu)造解釋的基礎(chǔ)上,利用測井曲線的處理和重構(gòu),針對不同類型的特殊儲層開展疊后和疊前聯(lián)合反演以及多屬性分析等研究工作。針對九佛堂組上段(簡稱九上段)薄層砂體,由于目的層砂體在縱向上與上下泥巖層阻抗非常接近,利用常規(guī)聲波時差開展薄儲層反演精度很低而且很難分辨,通過測井曲線敏感參數(shù)交匯分析,發(fā)現(xiàn)在本地區(qū)深側(cè)向電阻曲線對薄層砂體響應(yīng)更為敏感,利用擬聲波曲線重構(gòu)技術(shù)進行波阻抗反演,實現(xiàn)提高分辨薄層能力,并精確雕刻出多個砂體;對于九佛堂組下段(簡稱九下段)火山碎屑巖儲層,采用疊前、疊后聯(lián)合反演、多屬性分析等技術(shù),刻畫火山碎屑巖分布范圍,并根據(jù)儲層特點選擇合理的方法預(yù)測裂縫發(fā)育區(qū)。利用該研究結(jié)果進行了生產(chǎn)上井位部署和鉆井實施,取得了很好的效果,并建立一套適合該地區(qū)特點的有效儲層預(yù)測技術(shù)方法,同時對遼河外圍其它凹陷及地質(zhì)特征相類似地區(qū)的儲層預(yù)測具有重要指導(dǎo)意義。
[Abstract]:Luxi sag is the highest exploration degree and the best exploration effect in the peripheral basin of Liaohe. With the deepening of exploration, the exploration is becoming more and more difficult, and almost all structural reservoirs have been discovered in the 1980s. At present, the focus of exploration and development in this area is mainly to find structural lithologic reservoirs or lithologic reservoirs. The exploration degree in and around the Shijiazimiao sag is relatively low, and it is a typical lithologic oil and gas reservoir development area. Major breakthroughs have also been made in exploration in recent years. However, in the process of further study, there are many difficulties. Firstly, the upper member of Jiufutang formation is thin, mostly 212m. It is very difficult to identify thin reservoir by conventional wave impedance inversion based on seismic data. In addition, tuffaceous sandstone is generally developed in the lower member of Jiufutang formation in this area, and special lithology such as pyroclastic rocks are developed in some areas, which makes it difficult to identify favorable lithology and to predict fractures. In view of the above problems, this study makes full use of the existing data to interpret the fine structure of the area, and utilizes the processing and reconstruction of logging curves. The joint inversion and multiple attribute analysis are carried out for different types of special reservoirs. For the thin sand body of the upper member of Jiufutang formation, because the impedance of the target sand body is very close to that of the upper and lower mudstone strata, the inversion accuracy of thin reservoir developed by conventional sonic time difference is very low and difficult to distinguish. By analyzing the intersection of sensitive parameters of logging curve, it is found that the deep lateral resistance curve is more sensitive to the response of thin layer sand body in this area. The wave impedance inversion is carried out by using pseudo acoustic curve reconstruction technique to improve the resolution ability of thin layer. For the volcanic clastic rock reservoirs in the lower member of the Jiufutang formation, the prestack, post-stack joint inversion, multi-attribute analysis and other techniques are used to depict the distribution of pyroclastic rocks. According to the reservoir characteristics, reasonable methods are selected to predict the fracture development area. The results of this study are used to plan the production well location and to carry out drilling, and good results have been obtained, and a set of effective reservoir prediction techniques suitable for the characteristics of this area have been established. At the same time, it has important guiding significance for reservoir prediction in other sag around Liaohe River and similar geological features.
【學(xué)位授予單位】：長江大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：P618.13

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