庫車復雜地表區靜校正技術應用及效果

庫車復雜地表區靜校正技術應用及效果

呂景峰，李軍武，王劍

(中國石油東方地球物理公司，河北涿州 072751)

摘要：塔里木盆地庫車山地一直是塔里木油田油氣勘探的重點區域之一，但是該區地表條件復雜多樣，表層調查、建模困難，靜校正問題突出。本文將層析反演技術擴展到表層調查領域，采用微測井約束的淺層層析表層調查方法，解決了巨厚戈壁礫石區表層調查困難的問題。同時在傳統表層建模基礎上，創新提出了三維立體表層建模方法，通過在InLine和CrossLine方向上對表層調查控制線的近地表結構進行精細刻畫，大大地提高了表層建模的精度。不同的靜校正方法都具備自身的優勢和不足，在復雜區某一種靜校正方法很難解決所有的問題，綜合靜校正技術可以較好解決這些問題，具有廣闊的應用前景。以上方法的聯合應用，準確剖析了研究區的表層結構，提高了剖面的成像效果，為類似區域的表層調查、建模及靜校正工作提供了有益的借鑒。

關鍵詞：山地；表層調查；表層建模；靜校正；層析

中圖分類號：P631.4

基金項目：本研究受國家科技重大專項(2011ZX05046)資助。

作者簡介：第一呂景峰(1975年生)，男，高級工程師，1998年畢業于大慶石油學院，一直從事野外地震勘探研究工作。郵箱: lvjingfeng@cnpc.com.cn。

Static Correction Technology and Its Application in Kuqa Surface Area

Lv Jingfeng，Li Junwu，Wang Jian

(BureauofGeophysicalProspecting,ChinaNationalPetroleumCorporation,Zhuozhou,Hebei072751,China)

Abstract：Kuqa Mountain in Tarim Basin has been one of the main areas for oil and gas exploration in Tarim Basin, while this area has outstanding static correction problems for the difficulty in surface surveys and modeling due to its complex and diversified surface conditions. In this paper, the tomographic inversion technology was extended into the surface survey domain. It solved the difficult surface survey problems in super-thick gobi-gravel area with the uphole-constrained shallow-layer tomographic surface survey method. Meanwhile, a 3D solid surface modeling method was proposed innovatively on the basis of the traditional surface layer modeling, which precisely characterized the near-surface structure on the control lines of the surface survey in both the Inline and Crossline directions, resulting in a greatly improved surface layer modeling accuracy. Different static correction methods have their own advantages and disadvantages. One static correction method can hardly solve all the static correction problems in the complex area; hence, the comprehensive application of the static correction technologies can solve these better and has a broad application prospect. The joint application of the above methods analyzed accurately the surface structure in the area and improved the imaging effect of the section, which provided a valuable reference for the surface survey, modeling and static correction in similar areas.

Key words: mountain; surface investigation; surface modeling; static correction; tomography

塔里木庫車前陸盆地油氣資源豐富，勘探潛力巨大，是國家重要的能源戰略接替區。20世紀末至21世紀初，庫車前陸盆地先后發現了克拉2、迪那、大北1等一批大型天然氣田，促成了“西氣東輸”工程的啟動，并成為主要氣源地，為改變我國能源結構和促進新疆經濟發展做出了巨大貢獻[1]。……