本文選題：構(gòu)造演化 + 扭張性斷裂　； 參考：《石油地球物理勘探》2017年06期

【摘要】：依據(jù)大量的地震剖面解釋及地質(zhì)綜合分析成果,探討了印度河盆地T區(qū)塊區(qū)域構(gòu)造演化特征,總結(jié)了研究區(qū)扭張性斷裂構(gòu)造組合樣式和有利圈閉類型,進一步討論了構(gòu)造運動與油氣成藏的關(guān)系,得出以下認識。(1)盆地演化主要經(jīng)歷了基底期、侏羅紀裂谷期、白堊紀斜向拉張斷陷期和古近紀以來的板塊碰撞及構(gòu)造反轉(zhuǎn)等演化階段。多期次構(gòu)造運動導(dǎo)致研究區(qū)斷裂系統(tǒng)發(fā)育,構(gòu)造內(nèi)幕破碎。(2)由于白堊紀印巴板塊的漂移、旋轉(zhuǎn)和分離,導(dǎo)致了強烈的斜向拉張作用,形成了總體上壘塹相間、局部斷塊復(fù)雜化的構(gòu)造格局,并于白堊紀末期基本定型。結(jié)合白堊系扭張性斷裂構(gòu)造樣式分析,識別了6類平面、7類剖面的典型組合樣式。(3)T區(qū)塊具備優(yōu)越的油氣成藏條件,構(gòu)造運動促進生油巖的成熟和排烴;扭張性斷裂構(gòu)造樣式組合形成了多種圈閉類型,包括斷塊、斷鼻、斷背斜和構(gòu)造—巖性復(fù)合圈閉等;深大斷裂溝通了油源和圈閉,提供油氣運移通道,利于油氣成藏,扭張性斷裂活動與源巖排烴和圈閉形成期構(gòu)成良好的匹配關(guān)系。最后在構(gòu)造特征和油氣成藏分析的基礎(chǔ)上指出了有利油氣勘探區(qū)帶。
[Abstract]:Based on a large number of seismic section interpretation and geological comprehensive analysis results, the regional tectonic evolution characteristics of block T in the Indus Basin are discussed, and the structural assemblage patterns and favorable trap types of torsional tensional faults in the study area are summarized. The relationship between tectonic movement and hydrocarbon accumulation is further discussed. It is concluded that the evolution of the basin mainly experienced basement stage and Jurassic rift period. Cretaceous oblique extensional fault depression and plate collision and tectonic inversion since Paleogene. Because of the drift, rotation and separation of the Cretaceous India-Pakistan plate, this resulted in a strong diagonal extensional action, which resulted in the formation of the overall upper barrier graben phase. The complicated tectonic pattern of local fault blocks was basically fixed in the late Cretaceous. Based on the analysis of the tectonic style of the Cretaceous torsional tensional faults, the typical combination styles of the six types of plane and seven types of sections, the block of Yusanyitt, have superior oil and gas reservoir forming conditions, and the tectonic movement promotes the maturation and expulsion of hydrocarbon from the source rocks. The structural pattern assemblage of torsional fracture formed many types of traps, including fault block, fault nose, fault back slope and tectonic-lithologic complex trap, etc. Deep and large faults communicate oil source and trap, provide oil and gas migration channel, and facilitate oil and gas accumulation. The torsional tensional fault activity has a good matching relationship with hydrocarbon expulsion and trap formation of the source rock. Finally, on the basis of structural characteristics and hydrocarbon accumulation analysis, the favorable oil and gas exploration zones are pointed out.
【作者單位】： 油氣資源與勘探技術(shù)教育部重點實驗室(長江大學(xué));東方地球物理公司研究院;長江大學(xué)地球物理與石油資源學(xué)院;
【基金】：“十三·五”國家專項“川西源內(nèi)成藏體系成藏機理研究”(2016ZX05002-004-009)資助
【分類號】：P618.13

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