雅布赖盆地侏罗系新河组致密油形成条件与有利区资源潜力

发布时间：2018-03-04 11:37

  本文选题：有利区　切入点：致密油　出处：《石油与天然气地质》2017年03期 　论文类型：期刊论文

【摘要】：雅布赖盆地是我国西部一个侏罗纪湖相含油气盆地。为了评价其侏罗系新河组致密油的勘探前景,基于烃源岩、储集层条件及其配置关系的分析,采用地质要素叠合法优选出盆地的致密油有利区,并利用小面元容积法估算了资源潜力。研究表明,雅布赖盆地的优质烃源岩主要分布在中侏罗统新河组下段,累积厚度大、有机质丰度高、有机质类型好、处于生油的成熟热演化阶段,为致密油主要发育段;低孔、低渗的致密储集层主要以薄互层或夹层形式分布在烃源岩层内,原油具备典型的源内自生自储特征;成熟的富有机质烃源岩与储集层的大面积直接接触和巨厚的泥岩封盖是致密油发育的重要控制因素。首先,通过烃源岩成熟度确定了小湖次凹为致密油发育有利部位。然后,综合测井和录井油气显示成果,依据烃源岩TOC(有机碳含量)1%、0.6%Ro(镜质体反射率)1.3%、储集层(孔隙度≥4%)累计厚度10 m的标准,圈定了盆地致密油有利区主要分布在小湖次凹的中西部。最后,根据小面元容积法估算有利区石油地质资源量大致为0.92×10~8t,资源丰度平均为34.5×10~4t/km~2。
[Abstract]:Yabrai basin is a Jurassic lacustrine basins in Western China. In order to evaluate the Jurassic New River formation tight oil exploration prospects, based on the analysis of source rock, layer conditions and configuration of the reservoir, the geological factors superimposed selected favorable areas of dense oil basin, and estimates the resource potential using the facet the volumetric method. The results show that the Yabulai basin high quality source rocks are mainly distributed in the Middle Jurassic New River formation in the lower section, accumulated large thickness, high organic matter abundance, organic matter type, maturation stage in oil, tight oil as main development period; low porosity, mainly in the thin layer or layer sandwich are distributed in the form of hydrocarbon source rock in dense reservoir and low permeability, crude oil has the typical source of authigenic reservoir characteristics; organic rich source rocks and reservoirs are mature in direct contact with a large area and thick mudstone cap is tight oil development The main controlling factors. Firstly, the source rock maturity was determined for tight oil development. The lake favorable position. Then, comprehensive logging and logging results, on the basis of source rock TOC (SOC) 1%, 0.6%Ro (vitrinite reflectance) 1.3%, reservoir (porosity is greater than or equal to 4%) the standard thickness of 10 m, the favorable area of tight oil reservoir is mainly distributed in the lake sag in the Midwest. Finally, according to the facet volume method to estimate the favorable areas for petroleum resources was approximately 0.92 * 10~8t, 34.5 * 10~4t/km~2. average resource abundance

【作者单位】： 中国石油大学(北京)油气资源与探测国家重点实验室;中国石油玉门油田公司勘探开发研究院;
【基金】：中石油股份公司重大科技专项(2012E330) 中国石油第四次油气资源评价资助项目(2013E-050209)
【分类号】：P618.13
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本文编号：1565485