准噶尔盆地南缘侏罗系多种能源富集规律研究

发布时间：2018-04-21 13:20

本文选题：准噶尔盆地南缘 + 侏罗系　；参考：《中国地质大学(北京)》2017年硕士论文

【摘要】：准噶尔盆地南缘位于北天山山前陆冲断带上。该地区赋存有大量的化石能源,包括煤炭资源、常规油气资源和非常规资,且大多为侏罗系油气资源。本文以侏罗系为研究基础,以“源控论”为指导思想,结合前人研究成果,开展了准噶尔盆地南缘多种能源富集规律的研究,为该地区多种能源矿产的综合研究提供参考依据。对准噶尔盆地南缘基础石油地质条件进行总结归纳,将常规油气在平面上分为中部昌吉凹陷含油气区和东部阜康凹陷含油气区。平面上,受构造影响分布呈分带性,自北向南,由气到油,层位上逐渐变老。油气分段特征明显,第二排构造带以油藏为主,第三排构造带以气藏为主。纵向上可以分为下生上储式油气藏和自生自储式油气藏。准噶尔盆地南缘冲断带上有大量煤系地层。依据前人划分原则,确定煤层气评价标准,并将局部含气率6m3/t、900m埋深的煤系地层划为煤层气藏有利区,进一步确定乌鲁木齐河-四工河和呼图壁河-三屯河两个地区为煤层气藏优先勘探目标。以阜康凹陷为典型,在其凹陷沉积中心南部建立模拟井,并对热史进行模拟,结果显示,侏罗系烃源在170Ma左右开始生油,105Ma左右烃源岩达到中等成熟阶段,在50Ma左右开始大量生气,至现今一直处于生气阶段,并预测凹陷沉积中心区域可能有页岩气资源潜力。构造沉积共同作用,对多种能源富集有一定的影响。构造格局对油气的分布及后期运移有很大的影响,断裂起输导和封堵油气的双重作用;沉积环境、沉积相的组合关系决定了油气资源分布。单一能源发育区以常规油气富集为主,准南东部多能源矿产叠合区,并将其划分为三个有利富集区。东段的古牧地背斜、七道湾背斜、妖魔山背斜一带以“煤-常规油-页岩气-煤层气-油砂”为主要富集模式;中段东部齐古背斜带附近以“煤-常规油-煤层气”为主要富集模式。
[Abstract]:The southern margin of Junggar basin is located in the Foreland thrust belt of North Tianshan Mountain. There are a lot of fossil energy sources in this area, including coal resources, conventional oil and gas resources and unconventional resources, and most of them are Jurassic oil and gas resources. In this paper, the Jurassic system is taken as the research foundation, the theory of source control is taken as the guiding ideology, and the previous research results are combined to study the law of multiple energy enrichment in the southern margin of Junggar Basin, which provides a reference basis for the comprehensive study of various energy minerals in this area. The basic petroleum geological conditions in the southern margin of Junggar Basin are summarized and the conventional oil and gas are divided into oil-bearing areas in the central Changji depression and oil-bearing areas in the eastern Fukang sag in the plane. On the plane, the distribution affected by the structure is zonal, from north to south, from gas to oil, and gradually aging on the horizon. The characteristics of oil and gas segmentation are obvious, the second row of structural belt is mainly reservoir, the third row of structural belt is mainly of gas reservoir. Vertically, it can be divided into lower generation upper reservoir and self-generated self-storage reservoir. The southern margin of Junggar Basin has a large number of coal measures strata along the thrust belt. According to the principle of previous classification, the evaluation criteria of coalbed methane are determined, and the coal measure strata with a local gas content of 6m3 / t ~ 900m are classified as favorable areas for coalbed methane reservoirs. The Urumqi-Sigong River and the Hutubi River-Santun River are the priority targets for coalbed methane reservoir exploration. Taking Fukang sag as a typical example, a simulation well was established in the southern part of the depositional center of the sag, and the thermal history was simulated. The results show that the source rocks of Jurassic system began to generate oil at about 105 Ma or so in 170Ma, and the source rocks reached a medium mature stage. A large amount of gas was generated around 50Ma, and it has been in the stage of gas generation until now, and it is predicted that there may be shale gas resource potential in the depositional center of the sag. The interaction of tectonic deposits has certain influence on the enrichment of various energy sources. The tectonic framework has a great influence on the distribution and late migration of oil and gas, the fault plays a dual role in transporting and plugging oil and gas, and the combination of sedimentary environment and sedimentary facies determines the distribution of oil and gas resources. The single energy development area is dominated by conventional oil and gas enrichment and is divided into three favorable enrichment areas. The ancient pastoral anticline, Qidaowan anticline and Gomeshan anticline in the eastern section are mainly enriched by "coal-conventional oil-shale gas-coalbed methane-oil sand"; "Coal-conventional oil-coalbed methane" is the main enrichment model near the Qigu anticline in the eastern part of the middle section.
【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】：P618.1

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