塔里木盆地库车地区中—新生代油气藏流体包裹体研究

发布时间：2018-08-02 10:57

【摘要】：库车地区位于塔里木盆地北部,是塔里木地区重点的天然气勘探区域,优质的地质条件使该地区的成藏前景优越。本论文以库车地区中新生代碎屑岩地层为目的层,通过岩心及薄片分析该地区的岩石构造特征和成岩作用特征,并依靠赋存于地层矿物和脉体中的烃包裹体和盐水包裹体测试,反演油气成藏史,进行详细研究来刻画成藏过程。实验分析表明,库车地区共见到四期烃包裹体:1)第Ⅰ1期,具黄褐色荧光的烃包裹体,代表低成熟重质油。2)第Ⅰ2期,具黄色、黄白色荧光的烃包裹体,代表成熟中质油。3)第Ⅱ期,具蓝色荧光的包裹体,代表成熟-高成熟轻质凝析油。4)第Ⅲ期,黑色气态烃包裹体,代表成熟-高成熟天然气。通过伴生盐水包裹体捕获温度结合地热-埋藏史分析,厘定了库车地区三期包裹体对应的成藏期次。三期烃包裹体都是喜山期成藏的产物,第Ⅰ1期和第Ⅰ2期烃包裹体形成于晚第三纪康村早中期(17~10 Ma),第Ⅱ期烃包裹体形成于康村晚期—库车早中期(10~5Ma),第Ⅲ期烃包裹体形成于库车晚期—第四纪西域期(5~1 Ma)。三期烃包裹体表现出库车油气系统拥有晚期连续成藏的特点。库车地区构造板块复杂,成藏存在差异性,推测油气藏来源也不同。西部乌什凹陷油气来源于凹陷下部的三叠系烃源岩;东部依奇克里克构造带的油气主要来自于阳霞坳陷;中部克拉苏构造带的天然气主要来自于构造带下部和拜城凹陷的侏罗系烃源岩。
[Abstract]:Kuche area is located in the northern Tarim Basin, which is the key natural gas exploration area in Tarim area. The high quality geological conditions make the future of the region well. This paper takes the Mesozoic Cenozoic detrital strata in the Kuche area as the target layer, and analyses the rock structure characteristics and diagenesis characteristics of the area by core and thin slices, and relies on the Fu. The hydrocarbon inclusions and brine inclusions in the formation minerals and veins are tested, the history of hydrocarbon accumulation is retrieved, and the accumulation process is studied in detail. The experimental analysis shows that the four phase hydrocarbon inclusions in Kuche region: 1) the first 1, the yellow brown fluorescent hydrocarbon inclusions, the low mature heavy oil.2) in the first 2 period, with yellow, yellow white fluorine. The hydrocarbon inclusions of light, representing mature medium oil.3) stage II, with blue fluorescent inclusions, representing mature high maturity light condensate oil.4) stage III, black gaseous hydrocarbon inclusions, representing mature high mature natural gas. The three phases of inclusions in Kuche region were determined by the analysis of the capture temperature of associated brine inclusions and the history of geothermal and burial history. The three phase hydrocarbon inclusions are the products of the Himalayan accumulation, the first 1 and 2 hydrocarbon inclusions formed in the early and middle period of the late third period (17~10 Ma), the second hydrocarbon inclusions formed in the late Kang village - Kuche early and middle period (10~5Ma), and the third phase hydrocarbon inclusions formed in the late Kuche quaternary western region (5~1 Ma). The three hydrocarbon hydrocarbon The inclusions show that the Kuche oil and gas system has the characteristics of late continuous accumulation. The tectonic plates in the Kuche area are complex, the reservoir is different and the source of oil and gas is different. The oil and gas of the western Wushi sag originate from the Triassic source rock in the lower part of the depression; the oil and gas of the eastern Yiqi Crick tectonic zone mainly come from the Yu Yangxia depression; central gram. The natural gas in the Rusu structural belt mainly comes from the Jurassic source rocks in the lower part of the structural belt and the Baicheng sag.
【学位授予单位】：中国地质大学(北京)
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：P618.13

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