【摘要】：冀中坳陷的潛山是油氣勘探的重要領(lǐng)域。解剖潛山的地質(zhì)結(jié)構(gòu)、揭示潛山的成因機(jī)制是深化油氣勘探領(lǐng)域的認(rèn)識(shí)、深入分析潛山構(gòu)造演化的關(guān)鍵。本文在覆蓋全坳陷高精度的二維、三維地震資料,數(shù)百口深探井系統(tǒng)解釋的基礎(chǔ)上,應(yīng)用構(gòu)造解析方法,深入研究了潛山的地層系統(tǒng)、斷裂構(gòu)造與構(gòu)造演化特征,提出了潛山成因分類的新方案。研究表明,冀中坳陷的潛山經(jīng)歷了前中生代建造形成、侏羅紀(jì)晚期擠壓、白堊紀(jì)-古近紀(jì)多幕伸展斷陷與新近紀(jì)-第四紀(jì)沉陷埋藏的形成過程;依據(jù)潛山發(fā)育的構(gòu)造位置、構(gòu)造變形特點(diǎn)與伸展變形的強(qiáng)度,將潛山劃分為14種基本的成因類型;受控于長期演化及內(nèi)外地質(zhì)營力的聯(lián)合作用,潛山多具有復(fù)合成因,在平面上不同成因類型的潛山帶有規(guī)律地出現(xiàn),主要有掀斜斷塊-高凸起型、反向斷階型、同向斷階-高凸起型、橫向背斜或轉(zhuǎn)換凸起-反轉(zhuǎn)斜坡型、高凸起型-伸展外來斷塊型-反轉(zhuǎn)斜坡型、高凸起型-雙向旋轉(zhuǎn)型-高凸起型、掀斜斷塊-變質(zhì)核雜巖型等7種組合類型。其中,反向掀斜斷塊型、高凸起型、斷階型、反轉(zhuǎn)型斜坡、外來斷塊型等成因類型的潛山因源-儲(chǔ)組合、成山與成藏時(shí)期匹配而含油氣性較好。冀中坳陷的潛山油氣資源豐富,上述潛山成因分類方案有助于進(jìn)一步剖析潛山的油氣成藏機(jī)理與油氣分布規(guī)律。
[Abstract]:Buried hill in Jizhong depression is an important field of oil and gas exploration. Dissecting the geological structure of buried hill and revealing the genetic mechanism of buried hill are the key to deepen the understanding of oil and gas exploration field and analyze the evolution of buried hill structure. Based on the high precision 2D and 3D seismic data and the interpretation of hundreds of deep exploration wells in the whole depression, this paper has studied the stratigraphic system, fault structure and structural evolution characteristics of buried hill by means of structural analysis. A new scheme for genetic classification of buried hill is proposed. The study shows that the buried hill in Jizhong depression has experienced the formation of pre-Mesozoic formation, late Jurassic compression, Cretaceous Paleogene multi-episode extensional fault depression and Neogene Quaternary subsidence. The characteristics of tectonic deformation and the strength of extensional deformation can be divided into 14 basic genetic types, controlled by the long-term evolution and the combined action of internal and external geological forces, the buried hills are mostly of compound genesis. The buried hills of different genetic types appear regularly on the plane. They are mainly tilted fault-high protruding type, reverse fracture stage type, codirectional fault-high protruding type, transverse anticline or transverse-bulge slope type. There are seven types of assemblages: high uplift type-extensional extraneous fault block type-reverse slope type, high uplift type-bidirectional rotation type-high uplift type, tilting fault block type and metamorphic core complex type. Among them, the buried hill of the reverse tilting fault block type, the high protruding type, the fault terrace type, the anti-transformation slope type, the foreign fault block type and other genetic types of buried hill has better petroliferous property because of the source-reservoir assemblage, the matching between the mountain forming and the reservoir forming period. The buried hill in Jizhong depression is rich in oil and gas resources. The genetic classification scheme of buried hill is helpful to further analyze the mechanism of hydrocarbon accumulation and the distribution of oil and gas in buried hill.
【作者單位】： 中國地質(zhì)大學(xué)能源學(xué)院;中國石油華北油田分公司地球物理勘探研究院;
【基金】：國家自然科學(xué)基金項(xiàng)目(41430316) 中國石油天然氣股份有限公司重大科技專項(xiàng)(2017E-15)聯(lián)合資助
【分類號(hào)】：P618.13

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