本文選題：鄂爾多斯盆地 + 致密油水平井　； 參考：《西北大學(xué)學(xué)報(bào)(自然科學(xué)版)》2017年04期

【摘要】：聲波時(shí)差是進(jìn)行測(cè)井解釋和儲(chǔ)層評(píng)價(jià)的重要手段之一,但水平井測(cè)井環(huán)境有別于直井,原有的直井解釋模型已不再適用于水平測(cè)井,導(dǎo)致水平井測(cè)井解釋存在一定問題。研究認(rèn)為,層狀泥質(zhì)、巖石各向異性、井眼軌跡與地層幾何位置關(guān)系及儀器探測(cè)深度等是水平井聲波時(shí)差測(cè)井的主要影響因素;受砂體內(nèi)層狀泥質(zhì)或井眼附近泥質(zhì)圍巖的影響,含泥質(zhì)紋層或泥質(zhì)條帶砂巖聲波時(shí)差測(cè)井出現(xiàn)高異常;巖石各向異性特征是造成水平井塊狀砂巖及泥巖聲波時(shí)差測(cè)井值低于直井的主要控制因素,且泥巖的聲波時(shí)差各向異性的特征強(qiáng)于砂巖。同時(shí),該研究應(yīng)用數(shù)理統(tǒng)計(jì)法建立了水平井和直井對(duì)應(yīng)巖層聲波時(shí)差的相關(guān)關(guān)系,可將水平井環(huán)境下的聲波時(shí)差校正為直井環(huán)境下的聲波時(shí)差,對(duì)測(cè)井解釋和儲(chǔ)層評(píng)價(jià)具有較好的指導(dǎo)意義。
[Abstract]:Acoustic time lag is one of the important methods for logging interpretation and reservoir evaluation, but the logging environment of horizontal wells is different from that of vertical wells, and the original interpretation model of horizontal wells is no longer suitable for horizontal logging, which leads to some problems in logging interpretation of horizontal wells. It is considered that layered mud, anisotropy of rock, relationship between borehole trajectory and geometric position of formation and depth of instrumentation are the main influencing factors of acoustic time difference logging in horizontal wells, which are affected by layered muddy in sand body or muddy surrounding rock near borehole. High anomaly occurs in sonic time difference logging of sandstone with muddy stripe or mudstone stripe, the anisotropy of rock is the main controlling factor which causes the acoustic time difference of block sandstone and mudstone in horizontal well to be lower than that of straight well. The acoustic time difference anisotropy of mudstone is stronger than that of sandstone. At the same time, the correlation relationship between horizontal well and vertical well is established by using mathematical statistics method. The acoustic time difference in horizontal well environment can be corrected to sound wave time difference in horizontal well environment. It has good guiding significance for logging interpretation and reservoir evaluation.
【作者單位】： 中國(guó)石油長(zhǎng)慶油田分公司勘探開發(fā)研究院低滲透油氣田勘探開發(fā)國(guó)家工程實(shí)驗(yàn)室;
【基金】：中國(guó)石油天然氣股份有限公司重大科技專項(xiàng)基金資助項(xiàng)目(2011E-2602)
【分類號(hào)】：P618.13;P631.81

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