【摘要】：萬金塔地區(qū)位于德惠斷陷西緣斷壘帶,其構(gòu)造特征及變形機(jī)理與油氣成藏密切相關(guān)綜合區(qū)域地質(zhì)、鉆井及三維地震解釋資料,對萬金塔地區(qū)構(gòu)造樣式、斷裂系統(tǒng)特征、斷裂活動(dòng)期次及應(yīng)力場進(jìn)行分析;選取貫穿研究區(qū)的兩條地質(zhì)剖面,利用平衡剖面技術(shù)進(jìn)行復(fù)原,重塑構(gòu)造演化史;基于斷裂控藏作用,采用權(quán)重加權(quán)平均算法建立相應(yīng)數(shù)學(xué)評價(jià)模型,提出"三參數(shù)評價(jià)法"定量評價(jià)深大斷裂活動(dòng)程度。研究表明:萬金塔地區(qū)歷經(jīng)多旋回構(gòu)造運(yùn)動(dòng)改造調(diào)整,構(gòu)造疊加復(fù)雜,形成深部斷陷期基底斷裂及淺部反轉(zhuǎn)期疊加斷裂兩套斷裂系統(tǒng)。其中,溝通深部和淺部的深大斷裂性質(zhì)呈分段變化特點(diǎn),在逆沖走滑地區(qū)斷裂活動(dòng)程度相對較高,控制了平面上CO_2氣藏的富集,反之,在遠(yuǎn)離活動(dòng)程度高的深大斷裂、二期褶皺構(gòu)造疊加斷裂影響小、靠近沙河子組烴源巖灶的地區(qū)可能存在有機(jī)烴類氣藏的富集。
[Abstract]:The Wanjinta area is located in the western margin of the Dehui fault depression. Its structural characteristics and deformation mechanism are closely related to the oil and gas reservoir formation, the comprehensive regional geology, drilling and 3D seismic interpretation data, and the structural style and fault system characteristics of the Wanjinta area. Fault activity stage and stress field are analyzed, two geological sections running through the study area are selected, and the balanced section technique is used to reconstruct the history of structural evolution. The corresponding mathematical evaluation model is established by using weighted average weight algorithm, and a "three-parameter evaluation method" is proposed to quantitatively evaluate the degree of deep and large fault activity. The study shows that the Wan-jinta area has undergone the adjustment of multi-cycle tectonic movement and complicated structural superposition, forming two sets of fault systems: the basement fault in the deep fault depression and the superimposed fault in the shallow inversion period. Among them, the characteristics of deep and large faults in the communication between deep and shallow are segmented, and the degree of fault activity is relatively high in the backwash slip area, which controls the enrichment of CO_2 gas reservoir on the plane, whereas, it is far away from the deep and large fault with high activity degree. The superimposed faults of the second stage fold structure have little influence, and the accumulation of organic hydrocarbon gas reservoirs may exist in the area near the source rocks of Shahezi formation.
【作者單位】： 中國石油化工股份有限公司東北油氣分公司;甘肅省油氣資源研究重點(diǎn)實(shí)驗(yàn)室/中國科學(xué)院油氣資源研究重點(diǎn)實(shí)驗(yàn)室;
【基金】：國家自然科學(xué)基金(41502143) 中國石化科技項(xiàng)目(P14020)
【分類號】：P618.13

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