本文關(guān)鍵詞：柴達(dá)木盆地西部古近系生烴凹陷的邊界效應(yīng)與油氣聚集模式　出處：《石油學(xué)報(bào)》2017年11期 　論文類型：期刊論文

  更多相關(guān)文章： 生烴凹陷 邊界效應(yīng) 構(gòu)造地貌 古近系 柴西地區(qū)

【摘要】：柴達(dá)木盆地西部發(fā)育NW和NNW兩組方向的古近系生烴凹陷,生烴凹陷內(nèi)部充填了厚層、軟弱、富含有機(jī)質(zhì)的膏、鹽和泥質(zhì)沉積物,而生烴凹陷外側(cè)則是堅(jiān)硬的基底和較粗的砂質(zhì)沉積物,兩者構(gòu)成顯著的力學(xué)強(qiáng)度對比。在新近紀(jì)至第四紀(jì)擠壓作用下,這種的顯著力學(xué)強(qiáng)度對比引發(fā)了生烴凹陷內(nèi)外不同的構(gòu)造變形行為,并在地表形成截然不同的構(gòu)造地貌,稱之為生烴凹陷的"邊界效應(yīng)"現(xiàn)象,是識別和判定生烴凹陷的重要依據(jù)。英雄嶺是柴西地區(qū)規(guī)模最大、油氣最富集的新生代構(gòu)造帶,崛起于NW向生烴凹陷之上;柴西北區(qū)塊則位于該生烴凹陷北側(cè),軟弱的膏、鹽和泥質(zhì)沉積物或不發(fā)育,或顯著減薄,因而形成南翼山、大風(fēng)山和尖頂山等一系列長軸形構(gòu)造帶。此外,英雄嶺西段的滑脫構(gòu)造變形強(qiáng)烈,而英雄嶺東段則轉(zhuǎn)變?yōu)榛拙砣胧綐?gòu)造,可能暗示古近系生烴凹陷的充填成分自西向東發(fā)生了變化。生烴凹陷邊界效應(yīng)控制的油氣聚集主要分布于3類位置:第1類是沿著生烴凹陷邊緣,近源聚集于邊界效應(yīng)引起的構(gòu)造高部位;第2類是生烴凹陷外側(cè),源外聚集于三角洲、濱淺湖向半深湖過渡區(qū)域的構(gòu)造和巖性圈閉;第3類是生烴凹陷內(nèi)部,源內(nèi)聚集于古近系內(nèi)幕的構(gòu)造和巖性圈閉。因此,柴西地區(qū)應(yīng)采取"滿凹控藏、3種類型、分帶聚集"的思路,針對上述3類位置實(shí)施整體評價和勘探部署。
[Abstract]:NW and NNW two group development direction of Western Qaidam Basin in the Paleogene hydrocarbon generating sag, hydrocarbon generation sag filled with thick, soft, organic rich cream, salt and mud sediments, and the hydrocarbon generating sag is hard outside basement and coarse sandy sediments, mechanical strength constitute a significant contrast between the two in the Neogene to Quaternary. Under compression, the mechanical strength of the contrast significantly raised the hydrocarbon generation sag both in different deformation behaviors and different tectonic landforms formed on the surface, called the hydrocarbon generation depression "edge effect", is an important basis for the identification and determination of hydrocarbon generation depression. The hero the ridge is the largest in Western Qaidam basin, the oil and gas enrichment of Cenozoic tectonic belt, the rise in NW to hydrocarbon generation depression; northwest of Qaidam block is located in the north of the source sag, soft paste, salt and mud sediment or development, or a significant reduction, Thus the formation of Nanyishan and Jiandingshan Dafengshan, a series of long axis tectonic belt. In addition, the western part of the decollement Yingxiongling strongly deformed, while Yingxiongling East into the basement involved structure, may suggest that the Paleogene West filling ingredient source sag changed to the East. The oil and gas source sag the boundary effect control gathered mainly distributed in 3 types of position: first is along the hydrocarbon generating sag edge, near source accumulation high position of the structure caused by the boundary effect; the second category is the hydrocarbon generation depression outside source gathered in the Delta, shallow lake and semi deep lake to the transition structure and lithologic traps in the area; the third category is the hydrocarbon generating sag, structural and lithologic traps in source gathered in the Paleogene inside. Therefore, the western Qaidam region should adopt the "sag reservoirs, 3 types of zoning aggregation" ideas, according to the above 3 position to implement the overall evaluation and exploration deployment.

【作者單位】： 中國石油勘探開發(fā)研究院;中國石油青海油田公司勘探開發(fā)研究院;中國石油集團(tuán)東方地球物理勘探有限責(zé)任公司研究院地質(zhì)研究中心;
【基金】：國家自然科學(xué)基金項(xiàng)目(No.41172173,No.41472176) 中國石油天然氣股份有限公司重大科技專項(xiàng)(2016E-0101)資助
【分類號】：P618.13
【正文快照】： (1.PetroChina Research Institute of Petroleum Exploration and Development,Beijing100083,China;2.Research Instituteof Petroleum Exploration and Development,PetroChina Qinghai Oilfield Company,Gansu Dunhuang736202,China;3.Geological Research Center,BGP INC

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