本文選題：Wheeler變換 + 子體波形主成分分解��； 參考：《石油地球物理勘探》2017年05期

【摘要】：基于地震沉積學準層狀地層,提出了一個對應的阻抗模型,其地震信號可視為長、短旋回的組合反射。長旋回具有低頻、連續(xù)和相位穩(wěn)定的特征,短旋回則相反。地震的強軸屏蔽可理解為長旋回背景,被屏蔽的砂體則為短旋回信息。采用一種基于長、短旋回波形分析方法去除強屏蔽的影響,通過Wheeler正、反變換、子體波形主成分分解、短旋回分頻顯示等構成長、短旋回分析技術流程,達到去除屏蔽、識別薄砂層的目的。利用正演模型試驗,論證了算法的正確性和可行性;應用上述流程識別了松遼盆地北部強屏蔽T2之下的砂體信息,經主成分分解后的振幅切片反映了兩條從南向北展布的淺水三角洲前緣沉積體,證實上述流程具有較好的去強屏蔽效果,對于其他具有屏蔽特征或相似地質條件的儲層(例如煤層)描述具有借鑒價值。
[Abstract]:Based on the quasi stratiform seismic sedimentology, a corresponding impedance model is proposed, in which the seismic signal can be regarded as a combination reflection of long and short cycles. Long cycles are characterized by low frequency, continuity and phase stability, while short cycles are opposite. The strong axis shield of earthquake can be understood as a long cycle background, and the shielded sand body is a short cycle information. A method based on long and short cycle waveform analysis is adopted to remove the influence of strong shielding. The long and short cycle analysis technology flow is achieved by Wheeler forward, inverse transformation, principal component decomposition of sub-waveform, and short cycle frequency division display. The purpose of identifying thin sand beds. The correctness and feasibility of the algorithm are demonstrated by the forward modeling test, and the sand body information under strong shielding T2 in the north of Songliao Basin is identified by the above procedure. The amplitude slice after principal component decomposition reflects two shallow water delta front sedimentary bodies distributed from south to north. It is proved that the above process has a good effect of strong shielding. It can be used for reference to other reservoirs (such as coal seam) with shielding characteristics or similar geological conditions.
【作者單位】： 中國石油大慶油田有限責任公司;中國石油大慶油田有限責任公司勘探事業(yè)部;
【基金】：國家重大科技專項“大型油氣田及煤層氣開發(fā)”(2011ZX05001-001-004) 中國石油天然氣股份公司重大科技專項“大慶探區(qū)非常規(guī)油氣勘探開發(fā)關鍵技術研究與現(xiàn)場試驗”(2012E-2603)聯(lián)合資助
【分類號】：P631.4
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本文編號：1853766