四川盆地中部须家河组气、源地化特征及烃源岩生烃能力综合评价

发布时间：2018-01-18 06:31

  本文关键词：四川盆地中部须家河组气、源地化特征及烃源岩生烃能力综合评价　出处：《成都理工大学》2016年硕士论文　论文类型：学位论文

  更多相关文章： 川中地区 须家河组 地化特征 生烃能力 资源评价

【摘要】：四川盆地中部地区石油与天然气的勘探开发一直存在难题,很多学者依据构造地质学、层序地层学、沉积岩石学、储层地质学、天然气聚集带理论、源控论、天然气运聚动平衡等理论对须家河组的油气藏类型、成藏主控因素都进行过细致的研究,本论文利用有机地球化学的方法对川中须家河组气藏生烃及成藏进行研究,将烃源岩有机地化特征和油气地学特征研究结合,分析烃源岩展布特征与油气来源,结合生烃强度的计算对须家河组生烃能力进行综合评价,具体得出的结论如下:(1)、须家河组为一套湖泊、河流相沉积的含煤地层,自上而下可分为六段,须一段、须三段和须五段是烃源岩的主要富集区,暗色泥岩和煤层以夹层方式分布在须二段、须四段和须六段中。(2)、须家河组主要为Ⅱ2~Ⅲ型干酪根,煤的有机显微组分主要为镜质组、惰质组,干酪根有机质类型以腐泥型为主,热演化程度为成熟-高成熟阶段,原始有机质丰度相对较大。(3)、须家河组天然气主要为湿气,同时反应出典型的陆源煤型气特征,母质类型为Ⅲ型母质;须家河组凝析油具有高成熟腐植型成因的特征,且为煤成油。(4)、须家河组的上、下地层中虽然发育多套烃源层,但是川中地区构造活动微弱,结合须家河组与上下地层油气源对比表明,须家河组油气藏产出的油、气主要来自本身的烃源岩。(5)、川中地区须家河组烃源岩(包括暗色泥岩、碳质泥岩和煤层)的总生烃强度在10~30×108m3/km2之间,平均为23.0×108m3/km2(相当于SPI为2.35),生储盖组合为互层式自生自储,烃源岩与储层在平面上的相互接触面积大,烃源岩的油气充载能力属于中等。
[Abstract]:The exploration and development of petroleum and natural gas in the central part of Sichuan Basin has always been a difficult problem, many scholars based on structural geology, sequence stratigraphy, sedimentary petrology, reservoir geology, natural gas accumulation theory, source control theory. The oil and gas reservoir types of Xujiahe formation and the main controlling factors of reservoir formation have been studied in detail by natural gas migration and accumulation balance theory. In this paper, the hydrocarbon generation and reservoir formation of Xujiahe formation gas reservoir in central Sichuan are studied by using organic geochemistry method. The source rock distribution characteristics and hydrocarbon source are analyzed by combining the organic geochemical characteristics of source rock with the study of hydrocarbon geological characteristics. Combined with the calculation of hydrocarbon generation intensity, the hydrocarbon generating capacity of Xujiahe formation is comprehensively evaluated. The concrete conclusions are as follows: 1. The Xujiahe formation is a set of lakes and fluvial sedimentary coal-bearing strata, which can be divided into six sections from top to bottom. The main rich areas of hydrocarbon source rocks are the three and five members of Xuzhou formation. Dark mudstone and coal seam are distributed in the second member of the second member in the intercalation, and in the middle of the fourth and sixth members, the Xujiahe formation is mainly type 鈪，

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