本文選題：地球化學(xué)特征 + 烴源巖評(píng)價(jià)　； 參考：《成都理工大學(xué)》2015年碩士論文

【摘要】：普光地區(qū)位于四川盆地東北部,勘探面積約為1116km2。構(gòu)造上北抵大巴山逆沖推覆構(gòu)造帶前緣褶斷帶,南至川中平緩褶皺帶。普光地區(qū)中—下侏羅統(tǒng)主要發(fā)育千佛崖組(J2q)和自流井組(J1z)兩套烴源巖層。目前普光地區(qū)對(duì)中—下侏羅統(tǒng)烴源巖分布特征、烴源巖演化及生排烴特征、生烴演化史及資源潛力的認(rèn)識(shí)還不深入,尤其是烴源巖的主要生排烴期、規(guī)模及大小等。本文在對(duì)研究區(qū)的沉積、構(gòu)造背景系統(tǒng)研究基礎(chǔ)上,應(yīng)用地震及鉆井資料,結(jié)合上三疊統(tǒng)沉積以來(lái)經(jīng)歷的構(gòu)造階段,分析了不同階段的構(gòu)造活動(dòng)特點(diǎn)以及對(duì)烴源巖層的改造和油氣成藏的影響,并進(jìn)行了沉積間斷面剝蝕厚度的恢復(fù)。利用巖石有機(jī)碳豐度、類(lèi)型、成熟度分析,熱解分析和干酪根鏡檢等地化方法研究了普光地區(qū)中—下侏羅統(tǒng)烴源巖基本地化特征。研究結(jié)果:千佛崖組烴源巖有機(jī)碳含量0.4%~2.89%,平均為0.88%,中等—好烴源巖占50%;氯仿瀝青“A”含量0.0015%~0.0479%,平均為0.0018%,總烴含量平均10.74ppm。自流井組烴源巖有機(jī)碳含量0.4%~2.508%,平均為1.02%,中等—好烴源巖占80%;氯仿瀝青“A”含量0.00115%~0.0274%,平均為0.0066%,總烴含量平均為7.21ppm。兩套烴源巖層主要發(fā)育Ⅲ型有機(jī)質(zhì),少量發(fā)育Ⅱ型。Ro%的平均值在1.9%左右,已達(dá)到高成熟~過(guò)成熟階段。從剝蝕厚度恢復(fù)結(jié)果來(lái)看,燕山—喜山期剝蝕厚度大,在2295m~3654m之間,平面上主要呈現(xiàn)為隆起構(gòu)造帶剝蝕量大,洼陷剝蝕量小的特點(diǎn)。通過(guò)實(shí)驗(yàn)數(shù)據(jù)以及參閱文獻(xiàn)資料,明確了盆地模擬所需的各項(xiàng)參數(shù),利用盆模軟件PetroMod對(duì)普光地區(qū)中—下侏羅統(tǒng)烴源巖進(jìn)行了生排烴量和生排烴時(shí)期的模擬計(jì)算。模擬結(jié)果:自流井組烴源巖于中侏羅世中期進(jìn)入生烴門(mén)限,早白堊世末期Ro達(dá)到1.3%(高成熟階段);千佛崖組烴源巖于晚侏羅世晚期進(jìn)入生烴門(mén)限,早白堊世末期Ro達(dá)到1.3%(高成熟階段)。侏羅系烴源巖天然氣總資源量為653.33×108m3。其中,自流井組資源量為287.04×108m3,千佛崖組資源量為366.29×108m3。研究結(jié)果表明:兩套烴源巖有機(jī)碳含量分布不均,屬于中—好的烴源巖,但局部發(fā)育較好的烴源巖層;源巖母質(zhì)類(lèi)型以Ⅲ型干酪根為主;熱演化程度均達(dá)到成熟—高成熟階段,均已大量生氣;綜合研究區(qū)兩套烴源巖地球化學(xué)特征、熱演化模擬及資源量計(jì)算結(jié)果,該區(qū)資源潛力較大,具備較高的開(kāi)發(fā)潛力。
[Abstract]:The Puguang area is located in the northeast of Sichuan Basin, and the exploration area is about 1116km2. The north reaches the front fold fault zone of the Dabashan thrust nappe belt, and the south reaches the central Sichuan gentle fold belt. Two sets of hydrocarbon source rocks, Qianfoya formation and Ziliujing formation, are mainly developed in the Middle and Lower Jurassic in Puguang area. At present, the characteristics of source rock distribution, source rock evolution, hydrocarbon generation and expulsion, hydrocarbon generation history and resource potential in Puguang area are not well understood, especially the main hydrocarbon generation and expulsion periods, scale and size of hydrocarbon source rocks. On the basis of the study of sedimentary and tectonic background systems in the study area, this paper applies seismic and drilling data to the structural stages experienced since the Upper Triassic Sedimentary. The characteristics of tectonic activity in different stages and its influence on the transformation of source rock formation and hydrocarbon accumulation are analyzed, and the denudation thickness of intersedimentary cross-section is restored. The localization characteristics of the source rocks of the Middle-Lower Jurassic in Puguang area were studied by means of organic carbon abundance, type, maturity analysis, pyrolysis analysis and kerogen microscopic examination. The results show that the organic carbon content of Qianfoya formation source rock is 0.4 ~ 2.89, with an average of 0.88 and 50 with moderate to good hydrocarbon source rock, while the chloroform asphalt "A" content is 0.0015 and 0.0479, with an average of 0.001818 and a total hydrocarbon content of 10.74 ppm. The organic carbon content in the source rocks of the Ziliujing formation is 0.40.508, with an average value of 1.02and the medium-good source rocks account for 80. The chloroform bitumen "A" content is 0.00115and 0.0274, with an average value of 0.0066g, and the total hydrocarbon content is 7.21ppm. The two sets of source rocks mainly developed type 鈪，

本文編號(hào)：1890050