川中地区侏罗系油气源对比及烃源条件研究  

JURASSIC OIL-GAS SOURCE CORRELATION AND HYDROCARBON SOURCE CONDITION IN CENTRAL SICHUAN REGION

作　　者：陈盛吉[1] 万茂霞[1] 杜敏[1] 张鉴[1] 谢邦华[1] 

机构地区：[1]中油西南油气田公司勘探开发研究院

出　　处：《天然气勘探与开发》2005年第2期11-14,42,i002,共6页Natural Gas Exploration and Development

摘　　要：通过油气源研究指出,川中地区侏罗系气藏产出的油气主要来自侏罗系本身的烃源岩,但在局部地区侏罗系产出的天然气特征与下伏产层极为相似,这些气藏可能有深部气源层对其成藏的贡献。烃源岩的地化特征,展示中、下侏罗统有机碳丰度高,源岩以Ⅱ型为主,Ro多为1%左右,正处于成油高峰期。烃源岩定量评价结果表明,中、下侏罗统油气源较为丰富。在川中的中部和东北部烃源条件较好,有寻找油气的广阔前景。Through the oil & gas study, it is pointed out that the oil & gas produced from Central Sichuan Jurassic gas reservoir, mainly come out from Jurassic source rock. While the gas characteristics produced from local Jurassic are much similar to those of underlying payzone, there may be deep gas source layers' contribution to this gas reservoir forming. The geochemical feature of source rock reveals that there is a high carbon abundance in Middle and Lower Jurassic with mainly type-Ⅱ for the source rock, and Ro mostly to be 1% more or less, just situating in oil-forming peak stage. The quantitative evaluation result of source rock shows that the oil and gas source in Middle and Lower Jurassic is rather abundant; the hydrocarbon source condition in central and northeast part of Central Sichuan is better, there being a broad perspective for finding oil and gas.

关 键 词：烃源条件 川中地区 侏罗系 油气源对比 下侏罗统 烃源岩 地化特征 评价结果 天然气 气源层 有机碳 高峰期 东北部 产出 气藏 

分 类 号：P618.130.8[天文地球—矿床学]