發(fā)布時(shí)間：2018-02-22 01:25

  本文關(guān)鍵詞： CRP疊加道相關(guān)算法 剩余靜校正 縱橫波速度比 “零空間”漂移　出處：《石油地球物理勘探》2016年04期 　論文類(lèi)型：期刊論文

【摘要】：常規(guī)縱波構(gòu)造控制的共檢波點(diǎn)疊加道相關(guān)算法在處理復(fù)雜地區(qū)低信噪比、地下構(gòu)造起伏較大的轉(zhuǎn)換波地震資料時(shí),容易出現(xiàn)"縱橫波疊加剖面構(gòu)造層位不匹配,導(dǎo)致轉(zhuǎn)換波的構(gòu)造校正量計(jì)算不準(zhǔn)確"和"算法收斂于局部極值,疊加剖面出現(xiàn)零空間漂移"的現(xiàn)象。本文針對(duì)常規(guī)算法的此缺點(diǎn),分析了該算法的理論原理,提出增強(qiáng)縱橫波疊加剖面匹配質(zhì)量和壓制"零空間"現(xiàn)象的改進(jìn)措施:使用縱波共檢波點(diǎn)疊加剖面的構(gòu)造層位來(lái)匹配控制轉(zhuǎn)換波共檢波點(diǎn)疊加剖面的構(gòu)造層位,達(dá)到增強(qiáng)縱波CMP疊加剖面和轉(zhuǎn)換波ACCP疊加剖面的層位匹配一致性的目的,提高計(jì)算地下構(gòu)造校正量精度,進(jìn)而估算較準(zhǔn)確的縱橫波速度比值;計(jì)算共檢波點(diǎn)疊加道與拉平后的轉(zhuǎn)換波構(gòu)造層位之間的絕對(duì)靜校正量,以克服靜校正處理的"零空間"漂移現(xiàn)象。實(shí)際轉(zhuǎn)換波資料的應(yīng)用表明,改進(jìn)方法能夠進(jìn)一步提高常規(guī)縱波構(gòu)造控制的CRP疊加道相關(guān)算法的剩余靜校正處理適應(yīng)能力。
[Abstract]:The common detection point stack correlation algorithm controlled by conventional P-wave structure is easy to occur when dealing with converted wave seismic data with low signal-to-noise ratio (SNR) and large fluctuation of underground structures in complex areas. As a result of the inaccurate calculation of the structural correction of the converted wave, and the phenomenon that the algorithm converges to the local extremum and the stacking section has zero space drift, this paper analyzes the theoretical principle of the algorithm in view of this shortcoming of the conventional algorithm. The improvement measures of enhancing the matching quality of P-S wave stack profile and suppressing the phenomenon of "zero space" are put forward. The structural layer position of the P-wave common detector point stack section is used to match and control the tectonic layer position of the converted wave common detection point stack section. In order to enhance the consistency of horizon matching between P-wave CMP stack profile and converted wave ACCP stack profile, the accuracy of calculating the correction amount of underground structure is improved, and the accurate velocity ratio of P-S wave is estimated. In order to overcome the phenomenon of "zero space" drift of statics processing, the absolute static correction between the stacking channel of common detection point and the levelling layer of converted wave structure is calculated. The application of the actual converted wave data shows that, The improved method can further improve the residual statics processing adaptability of the CRP stack correlation algorithm controlled by conventional P-wave construction.
【作者單位】： 油氣藏地質(zhì)及開(kāi)發(fā)工程國(guó)家重點(diǎn)實(shí)驗(yàn)室;中國(guó)石化西南油氣分公司;
【分類(lèi)號(hào)】：P631.4

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