發(fā)布時(shí)間：2018-04-05 08:12

  本文選題：查干凹陷　切入點(diǎn)：油氣包裹體　出處：《成都理工大學(xué)》2015年碩士論文

【摘要】：查干凹陷位于內(nèi)蒙古自治區(qū)烏拉特后旗,銀-額盆地東部,查干德勒蘇坳陷中央,西臨西尼凸起,北達(dá)中央隆起帶,東臨楚干凸起,東南緊靠狼山。北東長(zhǎng)60km,南西寬34km,面積約2000km2,基底最大埋深6400m。本文主要通過裹體烴的文獻(xiàn)資料的查閱對(duì)流體包裹體的分類及其基本特征進(jìn)行系統(tǒng)的總結(jié),并在此基礎(chǔ)上分析查干凹陷的包裹體的特征,有機(jī)包裹體主要產(chǎn)出于石英次生加大邊、顆粒裂紋內(nèi)、次生裂隙以及少部分分布在石英顆粒和方解石表面。包裹體的形態(tài)大多規(guī)則,以橢圓形、長(zhǎng)條形為主及少部分不規(guī)則狀的形狀。包裹體大小一般為3~9μm。流體包裹體的氣液比一般分布比較廣,大部分介于3%~15%之間,產(chǎn)狀主要為單個(gè)獨(dú)立和成群分布。主要是以液相烴類包裹體居多,純氣相烴類包裹體較少。烴類包裹體的紫外熒光顏色主要為黃綠色與藍(lán)白色,即說明查干凹陷的成熟度為中成熟和高成熟為主。與烴類包裹體共生的含烴鹽水包裹體溫度范圍分布比較廣,在75.9~172℃之間。通過包裹體的均一溫度分析了查干凹陷的油氣成藏期次,巴一段經(jīng)歷了蘇紅圖組沉積時(shí)期一期油氣成藏;巴二段經(jīng)歷了蘇紅圖組沉積時(shí)期和銀根組沉積時(shí)期兩期油氣成藏;蘇一段和蘇二段經(jīng)歷了銀根組沉積時(shí)期一期成藏。通過各項(xiàng)生物標(biāo)志化合物的參數(shù)對(duì)比分析儲(chǔ)層烴與包裹體烴的關(guān)系確定其母質(zhì)輸入來源為低等水生生物和陸源高等植物的雙重貢獻(xiàn)且陸源高等植物的輸入占優(yōu)勢(shì),沉積環(huán)境主要為還原環(huán)境,其演化程度至少處于低熟或中成熟階段。通過油源對(duì)得出虎勒洼陷和額很洼陷有效烴源巖特征相似,所以說其原油可能主要來自近洼緩坡帶有效烴源巖。原油從虎勒洼陷生排烴后,沿著斷層向上運(yùn)移進(jìn)入圈閉到達(dá)中央構(gòu)造帶形成油藏,額很洼陷東部緩坡帶有效烴源巖生排烴后,其原油沿砂體側(cè)向運(yùn)移,進(jìn)入烏力吉構(gòu)造帶形成油藏。
[Abstract]:Chagan sag is located in Wulat Houqi, Inner Mongolia Autonomous region, east of Yinyeh basin, central of Chagandelesu depression, west of Xini uplift, north of central uplift zone, east of Chugan uplift, and southeast of Langshan.The area is about 2000km2 and the maximum buried depth of the basement is 6400m.In this paper, the classification and basic characteristics of fluid inclusions are systematically summarized by consulting the literature of hydrocarbon envelopes, and on this basis the characteristics of inclusions in Chagan depression are analyzed.Organic inclusions mainly occur on the surface of quartz particles and calcite due to the secondary enlargement edge of quartz particles and the secondary cracks in the grain cracks.The shape of inclusions is mostly regular, oval, long and a few irregular.The size of inclusions is generally 3 ~ 9 渭 m.The gas-liquid ratio of fluid inclusions is relatively wide, most of which are between 3% and 15%, and the occurrence of fluid inclusions is mainly a single independent and group distribution.Most of the hydrocarbon inclusions are liquid hydrocarbon inclusions, but the pure gas hydrocarbon inclusions are less.The ultraviolet fluorescence color of hydrocarbon inclusions is mainly yellowish green and blue-white, which means that the maturity of Chagan sag is mainly medium mature and high mature.The temperature range of hydrocarbon-bearing brine inclusions, which are symbiotic with hydrocarbon inclusions, is wide, ranging from 75.9 鈩，

本文編號(hào)：1713911