【摘要】：冀中凹陷的文安地區(qū)構(gòu)造演化較復(fù)雜,斷裂發(fā)育較多,且斷裂密集分布。在研究區(qū)的斷裂在成因上有較密切的聯(lián)系,且密集的成條帶狀分布的多條斷裂被稱(chēng)為斷裂密集帶。前人對(duì)冀中坳陷的文安地區(qū)斷裂的發(fā)育、演化和控藏作用的研究已經(jīng)非常充分,但對(duì)文安地區(qū)斷裂密集帶的研究還比較少,因此本文對(duì)文安地區(qū)斷裂密集帶對(duì)油氣成藏的控制作用展開(kāi)了的詳細(xì)研究。這對(duì)搞清斷裂密集帶控藏、選擇有利開(kāi)發(fā)區(qū)以及豐富斷裂密集帶控藏理論均具有重要意義。首先充分調(diào)研了文安地區(qū)的區(qū)域地質(zhì)概況,其中包括文安地區(qū)的區(qū)域地層發(fā)育特征、區(qū)域構(gòu)造及演化特征和生儲(chǔ)蓋組合特征。然后在前人研究的基礎(chǔ)上,進(jìn)一步研究冀中凹陷文安地區(qū)的斷裂幾何學(xué)特征及其演化特征,從斷裂類(lèi)型、走向、密度、規(guī)模及組合模式入手,根據(jù)斷裂的發(fā)育及活動(dòng)特征對(duì)文安地區(qū)劃分了六套斷裂系統(tǒng)。并厘定研究區(qū)的輸導(dǎo)斷裂,文安地區(qū)的輸導(dǎo)斷裂主要發(fā)育在源外斜坡帶,為研究文安地區(qū)斷裂密集帶對(duì)油氣運(yùn)移的上調(diào)作用打下基礎(chǔ)。接下來(lái)詳細(xì)研究了文安地區(qū)斷裂密集帶的分布規(guī)律和斷裂密集帶的成因,并對(duì)研究區(qū)的油氣藏分布規(guī)律進(jìn)行研究。文安地區(qū)主要發(fā)育構(gòu)造油氣藏、地層油氣藏和斷層巖性油氣藏,油氣在平面上冀中坳陷文安地區(qū)油氣呈“分段分帶”的特征分布,受斷裂帶控制作用明顯。縱向上,文安地區(qū)的油氣由斜坡凹陷區(qū)逐漸向斜坡外帶的淺層調(diào)整,油氣的埋深由東向西漸漸降低,油氣的富集層位也呈現(xiàn)出這樣的特點(diǎn)。最后研究了文安地區(qū)斷裂密集帶對(duì)油氣成藏的控制作用。研究區(qū)近源斷裂密集帶的一側(cè)及內(nèi)部應(yīng)是油氣聚集的有利部位,斷裂密集帶邊界斷裂與蓋層配置關(guān)系控制著油氣聚集層位。斷裂密集帶邊部斷裂形成對(duì)接封閉時(shí),對(duì)垂直于斷裂密集帶運(yùn)移的油氣在橫向起到了遮擋的作用,油氣在斷裂密集帶邊部聚集;若油氣在斷裂密集帶內(nèi)部聚集,斷裂密度越大,越有利于油氣聚集;斷裂密集帶對(duì)沿著其走向運(yùn)移的油氣在側(cè)向起到了調(diào)整的作用,斷裂密集帶的邊界斷裂可作為有利輸導(dǎo)通道,與蓋層相配合控制油氣聚集層位,當(dāng)蓋層斷接厚度小于蓋層封油氣所需最小斷接厚度時(shí),斷裂密集帶的邊界斷裂可對(duì)油氣進(jìn)行上調(diào)運(yùn)移。
[Abstract]:In Wenan area of Jizhong sag, the tectonic evolution is more complicated, the faults are more developed and the faults are densely distributed. The faults in the study area are closely related to the origin of the faults, and the dense distribution of multiple faults in striped form is called the fault-dense zone. Previous studies on fault development, evolution and reservoir control in Wenan area of Jizhong depression have been well studied, but there are few studies on the concentrated fault zones in Wenan area. In this paper, the controlling effect of faulted dense zone on oil and gas accumulation in Wenan area is studied in detail. It is of great significance to find out the reservoir control theory of fault-dense zone, to select favorable development zone and to enrich the theory of fault-dense zone controlling reservoir. Firstly, the regional geological survey of Wenan area is studied, including the characteristics of regional stratigraphic development, regional tectonics and evolution, and the assemblage of source, reservoir and caprock. Then on the basis of previous studies, we further study the characteristics of fault geometry and its evolution in Wenan area, Jizhong Depression, starting with the types, strike, density, scale and combination model of the faults. According to the characteristics of fault development and activity, six sets of fault systems were divided in Wenan area. The transport faults in Wenan area are mainly developed in the slope zone outside the source, which lays a foundation for the study of the up-regulation of oil and gas migration in the concentrated fault zone in Wenan area. Then, the distribution law of the fault-dense zone and the origin of the fault-dense zone in Wenan area are studied in detail, and the distribution law of oil and gas reservoirs in the study area is also studied. Structural reservoirs, stratigraphic reservoirs and fault lithologic reservoirs are mainly developed in Wenan area. The distribution of oil and gas in Wenan area of Jizhong depression is "divided into zones", which is controlled by fault zone obviously. Longitudinally, the oil and gas in Wenan area is gradually adjusted from the slope depression to the shallow layer outside the slope, and the depth of oil and gas burying gradually decreases from east to west. Finally, the controlling effect of faulted dense zone on oil and gas accumulation in Wenan area is studied. In the study area, the one side and the interior of the near-source fault-dense zone should be the favorable part for hydrocarbon accumulation, and the relationship between the boundary fault and the caprock configuration of the fault-dense zone controls the oil-gas accumulation horizon. When the faults in the edge of the fault-dense zone form a docking seal, the migration of oil and gas perpendicular to the fault-dense zone plays a role in blocking the lateral migration of oil and gas, and the oil and gas accumulates in the edge of the fault-dense zone, and if the oil and gas accumulates in the interior of the fault-dense zone, the greater the fracture density is, The more favorable the accumulation of oil and gas, the more the fault dense zone can adjust the migration of oil and gas along its strike, and the boundary fault of the fault dense zone can be used as a favorable channel to control the accumulation of oil and gas in cooperation with the caprock. When the fracture thickness of caprock is less than the minimum fracture thickness required for sealing oil and gas of caprock, the boundary faults in the fault-dense zone can increase the migration of oil and gas.
【學(xué)位授予單位】：東北石油大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：P618.13

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