本文選題：長嶺氣田 + 登婁庫組��； 參考：《吉林大學(xué)》2017年碩士論文

【摘要】：松遼盆地南部長嶺斷陷的下白堊統(tǒng)登婁庫組致密砂巖儲(chǔ)層中發(fā)現(xiàn)了長嶺氣田,拓展了該斷陷天然氣勘探的新領(lǐng)域。本文通過生儲(chǔ)蓋運(yùn)保等因素分析登婁庫組氣藏的成藏條件,并將構(gòu)造演化史分析與儲(chǔ)層包裹體分析技術(shù)相結(jié)合,以CS1井埋藏史恢復(fù)為基礎(chǔ),研究長嶺氣田登婁庫組烴類氣藏的形成時(shí)間與期次。通過收集的資料以及大量的數(shù)據(jù)分析得知,長嶺斷陷登婁庫組自身不具備生烴條件,下伏層烴源巖產(chǎn)生的煤型CH4先期在下白堊統(tǒng)營城組火山巖中富集成藏。至晚白堊世青山口末期,在長嶺氣田北部的乾安附近發(fā)生過一次水下火山巖噴發(fā)事件,引發(fā)原有的深源斷裂活化,幔源無機(jī)CO_2沿著斷裂向地殼表層運(yùn)移到營城組火山巖烴類氣藏中,被置換出的CH4烴類氣體此時(shí)向上運(yùn)移至登婁庫組砂巖層中富集形成次生氣藏,顯而易見,斷裂活動(dòng)是登婁庫組氣藏形成的主控因素。在顯微鏡下觀察長嶺氣田登婁庫組儲(chǔ)層包裹體為氣、液倆相,包裹體均一溫度在99.2~138.6℃范圍,主峰值在120~125℃之間,主峰頻率約為33㳠,證實(shí)長嶺氣田登婁庫組氣藏為一期成藏。將CS1井的埋藏史、地?zé)崾泛蛢?chǔ)集層中流體包裹體的均一溫度數(shù)據(jù)相結(jié)合,確定長嶺氣田登婁庫組烴類氣的成藏時(shí)間是79Ma,該時(shí)期登婁庫組埋藏深度為1800~2000m,儲(chǔ)層成巖程度相對要弱,物性特征相對要好,恰好處于斷陷期三套烴源巖的生氣高峰期和斷裂的活化期,利于CH4的運(yùn)移和富集成藏。應(yīng)用GOCAD建模軟件,建立了長嶺氣田登婁庫組烴類氣成藏過程的三維地質(zhì)模型。
[Abstract]:Changling gas field was discovered in the tight sandstone reservoir of the lower Cretaceous Denglouku formation in Changling fault depression in the south of Songliao Basin, which expanded the new field of natural gas exploration in this fault depression. In this paper, the reservoir forming conditions of Denglooku formation gas reservoir are analyzed by the factors such as source, reservoir and cover transportation, and the structural evolution history analysis is combined with the reservoir inclusion analysis technique, based on the recovery of buried history of CS1 well. The formation time and period of hydrocarbon gas reservoirs in Denglooku formation of Changling gas field are studied. The collected data and a large amount of data analysis show that the Denglooku formation in Changling fault depression does not possess the conditions for hydrocarbon generation, and that the coal-type CH4 produced by the underlying source rocks was rich and integrated in the volcanic rocks of the Yingcheng formation of the Lower Cretaceous. At the end of Qingshankou in late Cretaceous, there was an underwater volcanic eruption near Gan'an in the northern part of Changling gas field, which caused the activation of the original deep-source faults. The mantle source inorganic CO_2 migrates to the volcanic rock hydrocarbon gas reservoir of Yingcheng formation along the fault to the surface of the crust, and the replaced CH4 hydrocarbon gas migrates upward to the sandstone layer of the Dendenglouku formation to enrich and form the secondary gas reservoir, which is obvious. Fault activity is the main controlling factor of gas reservoir formation in Denglooku formation. Under microscope, the reservoir inclusions of Dengloku formation in Changling gas field are gas and liquid facies, the homogenization temperature of inclusions is in the range of 99.2N 138.6 鈩，

本文編號：1841200