【摘要】：潿西南凹陷南斜坡晚始新世流一段時(shí)期發(fā)育自南向北推進(jìn)的扇三角洲沉積,而內(nèi)部多期朵葉體又具有縱向疊置、橫向連片的特點(diǎn),從其沉積內(nèi)幕的復(fù)雜性和巖性圈閉難識(shí)別、難預(yù)測(cè)的特點(diǎn)入手,從層序約束下的砂體雕刻、復(fù)雜儲(chǔ)層預(yù)測(cè)以及油氣地質(zhì)意義方面對(duì)該區(qū)細(xì)致剖析,逐一尋找垂向相序變化規(guī)律、優(yōu)質(zhì)儲(chǔ)層的展布規(guī)律、油氣富集規(guī)律,從而提升該區(qū)的整體評(píng)價(jià)價(jià)值。研究得出,該區(qū)流一段下部可細(xì)分為兩個(gè)四級(jí)層序,共識(shí)別出5期三角洲朵葉體,13套縱橫疊置的單砂體,而沉積水動(dòng)力條件應(yīng)是導(dǎo)致其非均質(zhì)性強(qiáng)、物性差異的根本原因。結(jié)合油氣成藏認(rèn)識(shí),首次提出自北向南三排構(gòu)造的不同成藏主控因素和研究方向,對(duì)該區(qū)隱蔽圈閉的預(yù)測(cè)和精細(xì)評(píng)價(jià)具有一定的指導(dǎo)意義,也進(jìn)一步夯實(shí)了潿西南增儲(chǔ)穩(wěn)產(chǎn)的信念。
[Abstract]:Fan delta deposits from south to north were developed in the south slope of Wei Southwest Sag during the late Eocene current period, while the internal multi-stage flower bodies have the characteristics of vertical superposition and horizontal linking, so it is difficult to identify the complexity and lithologic traps of the sedimentary interior. Starting with the characteristics of difficult prediction, this paper analyzes the sand body carving, the prediction of complex reservoir and the geological significance of oil and gas in this area one by one in order to search for the law of vertical phase sequence change, the distribution law of high quality reservoir, and the law of oil and gas enrichment, from the aspects of sequence constrained sand body carving, complex reservoir prediction and hydrocarbon geological significance. So as to enhance the overall evaluation value of the area. The study shows that the lower part of the first member of the flow in this area can be subdivided into two four-order sequences, and a total of 13 sets of single sand bodies with vertical and horizontal overlay are identified in the fifth stage of the delta. The sedimentary hydrodynamic conditions should be the fundamental cause of the strong heterogeneity and the difference in physical properties. Combined with the understanding of oil and gas accumulation, it is the first time to put forward the main factors and research directions of different reservoir formation from north to south, which has certain guiding significance for the prediction and fine evaluation of subtle traps in this area. It also further rammed up the belief of increasing storage and stable production in Wei Southwest.
【作者單位】： 中海石油(中國(guó))有限公司湛江分公司;
【基金】：國(guó)家重大課題專項(xiàng)(2016ZX05024-006)
【分類號(hào)】：P618.13

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