【摘要】：葡北地區(qū)中淺層構(gòu)造圈閉勘探程度較高,主要構(gòu)造圈閉多已經(jīng)鉆探,屬于油田勘探的中后期。精細(xì)構(gòu)造勘探和巖性、地層圈閉勘探工作將是葡北地區(qū)未來(lái)勘探的重點(diǎn)目標(biāo),同時(shí),探明東斜坡對(duì)葡北主油藏的控制作用也極為重要。 本文以葡北地區(qū)三維地震資料為主,對(duì)葡北地區(qū)侏羅系目的層建立了層序格架,進(jìn)行了構(gòu)造精細(xì)解釋和儲(chǔ)層預(yù)測(cè),進(jìn)一步落實(shí)葡北地區(qū)七克臺(tái)組底界和三間房組的斷裂組合特征、構(gòu)造演化特征和圈閉形態(tài)。葡北地區(qū)構(gòu)造特征主要是南西抬升,北東下降的單斜,來(lái)自南北向的擠壓構(gòu)造作用非常明顯,東部發(fā)育斜坡區(qū),是在向北傾伏的基巖鼻狀低隆起上繼承性發(fā)育起來(lái)的低幅度構(gòu)造群,主要發(fā)育近東西向鼻狀構(gòu)造,在PB101井附近可見(jiàn)明顯的背斜形態(tài)。斷裂系統(tǒng)主次分明,對(duì)成藏控制作用明顯。新發(fā)現(xiàn)圈閉8個(gè),總面積72.187km2。分析了葡北地區(qū)目的層井下測(cè)井響應(yīng)特征,發(fā)現(xiàn)常規(guī)聲波阻抗在區(qū)分泥巖與砂巖儲(chǔ)層上效果不好,而自然電位曲線在區(qū)分巖性上效果好很多,綜合儲(chǔ)層預(yù)測(cè)的需要,利用擬聲波曲線重構(gòu)的方法對(duì)目的層進(jìn)行了反演研究,同時(shí)結(jié)合了地震屬性、疊前AVO屬性和油氣檢測(cè)技術(shù)對(duì)目標(biāo)圈閉進(jìn)行了評(píng)價(jià)。在沉積相研究的基礎(chǔ)上,預(yù)測(cè)了砂體平面和縱向的展布情況,確定了斷裂控藏作用及有利圈閉的勘探潛力。根據(jù)構(gòu)造特征、圈閉發(fā)育與落實(shí)程度、儲(chǔ)層預(yù)測(cè)、屬性分析以及油氣檢測(cè)結(jié)果明確了有利勘探區(qū)域,提供了建議勘探井位方案,為葡北地區(qū)進(jìn)一步評(píng)價(jià)與開(kāi)發(fā)方案的部署奠定了基礎(chǔ)。
[Abstract]:The exploration degree of middle and shallow structural traps in Pubei area is relatively high, and the main structural traps have been drilled mostly, which belongs to the middle and late stage of oil field exploration. Fine structure exploration, lithology and stratigraphic trap exploration will be the key targets for future exploration in the north of Portugal. At the same time, it is very important to find out the control effect of east slope on the main reservoir in north Portugal. In this paper, based on the 3D seismic data in the north of Portugal, the sequence framework of the Jurassic target layer in the north of Portugal is established, and the fine interpretation of the structure and reservoir prediction are carried out. The characteristics of fault assemblage, tectonic evolution and trap morphology of the bottom boundary of Qiketai formation and Sanjianfang formation in Pubei area are further carried out. The structural characteristics of the north Portuguese area are mainly the southwestern uplift, the north east descending monoclinal, the compressional structure from the south to north direction is very obvious, the eastern developed slope area, It is a low-amplitude structural group inherited from the nose-shaped low uplift of bedrock which is trending northward. It mainly develops near east-west nose structure and has obvious anticline shape near PB101 well. The fault system has distinct main and secondary functions and has obvious effect on controlling reservoir formation. Eight new traps with a total area of 72.187km2. The response characteristics of downhole logging in the target zone in Pubei area are analyzed. It is found that the conventional acoustic impedance is not effective in distinguishing mudstone from sandstone reservoir, while the natural potential curve is much better in distinguishing lithology, so it is necessary to synthesize reservoir prediction. The inversion of the target layer is carried out by using the pseudo acoustic curve reconstruction method, and the target trap is evaluated by combining seismic attributes, prestack AVO attributes and oil and gas detection techniques. Based on the study of sedimentary facies, the distribution of sand bodies in plane and longitudinally is predicted, and the exploration potential of fault-controlled reservoir and favorable traps is determined. According to the structural characteristics, the degree of trap development and implementation, reservoir prediction, attribute analysis and oil and gas detection results, the favorable exploration area is identified, and the proposed exploration well location scheme is provided. It lays a foundation for the further evaluation and deployment of the development program in the north of Portugal.
【學(xué)位授予單位】：西南石油大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：P618.13

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