【摘要】：本論文是通過地面地質、鉆井和地震資料的綜合解釋與研究工作,結合前人的科研成果對楚雄盆地構造展布特征、構造演化及生、儲、蓋等石油地質條件研究,在此前提下,開展楚雄盆地構造格局和演化特征研究；弄清盆地斷裂及空間展布；明確盆地構造演化及斷裂活動對油氣成藏的影響,優(yōu)選楚雄盆地油氣資源遠景區(qū)。以盆地構造格局及演化特征研究為主線,聯(lián)系楚雄盆地盆地演化、改造過程,抓住圈閉形成期與主要生排烴期的匹配關系以及各期構造運動對油氣藏的改造破壞性質等關鍵重點問題,全方位分析構造演化和油氣賦存等石油地質條件。在完成論文過程中查閱楚雄盆地盆地構造、沉積地層、成藏演化、烴源巖研究等相關研究論文資料128篇；收集研究區(qū)內相關的區(qū)域地質、資源評價、原型盆地恢復與評價、保存條件研究及相關的地震剖面等資料,鉆井資料3口；進行地震剖面綜合地質解釋820剖面公里；野外地質路線調查75剖面公里。通過上述研究取得對楚雄盆地勘探前景的認識。(1)楚雄盆地在晚三疊世早期(T3y和T31)屬于前陸盆地,哀牢山為與之伴生的造山帶,前淵位于西部推覆帶(云南驛組和羅家大山組沉積厚度均超過1000米)。晚三疊世干海資期—白堊紀,楚雄盆地屬斷-坳陷盆地,但在喜山期受到強烈改造,由于僅元謀凸起附近發(fā)育少量的古近系,總體上盆地屬中生代殘留克拉通坳陷盆地。(2)盆地主力生油巖(上三疊統(tǒng))均分布于西部,烴源條件較好,而盆地東部云龍、東山凹陷主力生油巖在下寒武統(tǒng)、泥盆系,但其規(guī)模有限,且西部盆地存在著大量的油苗、氣苗和瀝青點,因此盆地西部成藏條件優(yōu)于東部。(3)盆地西部,沉積有較厚的云南驛組和羅家大山組,烴源條件好,多期構造運動形成眾多的大小圈閉,且地表有較多的瀝青與油苗,應存在構造改造后的次生油藏。(4)盆地中部凹陷區(qū)內構造,受后期喜山運動改造強烈,但這時上三疊統(tǒng)烴源巖進入生氣高峰期,具備形成氣藏構造的條件,同時亦會對前期燕山晚期成藏的構造進行改造,形成次生油氣藏。(5)西部逆沖推覆斷裂帶下盤構造,具有近油源,遭受后構造影響較弱,保存條件相對良好,應是西部推覆帶下步勘探目標,這也可能是楚雄盆地取得油氣勘探突破的目標之一。
[Abstract]:This paper is based on the comprehensive interpretation and research work of surface geology, drilling and seismic data, combined with previous scientific research results to study the characteristics of tectonic distribution, structural evolution and petroleum geological conditions, such as generation, reservoir, cap and so on in Chuxiong Basin. To study the tectonic framework and evolution characteristics of Chuxiong Basin; It is clear that the fault and spatial distribution of the basin and the influence of tectonic evolution and fault activity on oil and gas accumulation in the basin. Based on the study of the tectonic framework and evolution characteristics of the basin, the evolution and transformation process of the Chuxiong Basin are connected. The key problems such as the matching relationship between trap formation stage and main hydrocarbon generation and expulsion period and the reconstruction and destruction properties of oil and gas reservoirs by tectonic movement in each stage are grasped and the petroleum geological conditions such as tectonic evolution and oil and gas occurrence are analyzed in all directions. In the process of completion of the paper, 128 papers were consulted, such as structure, sedimentary strata, reservoir formation and evolution of Chuxiong basin, study of hydrocarbon source rock, etc. The relevant regional geology, resource evaluation, prototype basin restoration and evaluation, preservation condition research and related seismic profile data were collected, drilling data were collected and 3 wells were drilled, and 820 km comprehensive geological interpretation of seismic profile was carried out. Field geological route survey 75 km. The exploration prospect of Chuxiong basin is obtained through the above research. (1) the Chuxiong basin belongs to the Foreland basin in the early late Triassic (T3y and T31), and Ailaoshan is the orogenic belt associated with it. Qianyuan is located in the western nappe zone (the sedimentary thickness of Yunnanyi formation and Luojiashan formation is more than 1000 meters). The late Triassic drying-Cretaceous, Chuxiong basin belongs to the fault-depression basin, but was strongly modified in the Himalayan period, due to the development of a small number of Paleogene systems near the Yuanmou uplift. Generally speaking, the basin is a Mesozoic residual craton depression basin. (2) the main source rocks (upper Triassic) are distributed in the western part of the basin, and the hydrocarbon source conditions are good, while the main source rocks of Yunlong and Dongshan sag in the eastern part of the basin are in the Lower Cambrian and Devonian. But its scale is limited, and there are a lot of oil, gas and asphalt spots in the western basin, so the reservoir forming conditions in the western part of the basin are superior to those in the east. (3) in the western part of the basin, there are thick Yunnanyi formation and Luojiashan formation, and the hydrocarbon source conditions are good. The multi-stage tectonic movement forms numerous traps, and there are more bitumen and oil seedlings on the surface, so there should be secondary reservoirs after structural transformation. (4) the structure in the central depression of the basin is strongly modified by the late Himalayan movement. But at this time, the source rocks of the Upper Triassic have entered the peak of gas generation and have the conditions for forming the gas reservoir structure. At the same time, the reservoir forming structure of the late Yanshanian period will be reformed to form the secondary oil and gas reservoir. (5) the downboard structure of the western thrust-nappe fault zone, Because of its near oil source, weak post-tectonic influence and relatively good preservation conditions, it should be the next exploration target in the western nappe, which may also be one of the targets for oil and gas exploration breakthrough in Chuxiong Basin.
【學位授予單位】：長江大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：P618.13

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