西藏伦坡拉盆地古近系牛堡组烃源岩预测与评价

发布时间：2018-07-06 17:42

  本文选题：牛堡组 + 烃源岩评价　； 参考：《地球科学》2017年04期

【摘要】：伦坡拉盆地是西藏地区唯一获工业性油气流的盆地,油气勘探前景广阔,但其勘探和研究程度均较低,对古近系牛堡组烃源岩的发育状况认识不清,制约了盆地油气资源潜力评价和勘探选区.通过研究钻井、测井及相关化验测试等资料,利用测井多参数回归和盆地数值模拟等方法技术,分析了牛堡组主要亚段有机质丰度、类型及其展布等特征,模拟重建了烃源岩的热成熟演化历史,实现了对伦坡拉盆地牛堡组烃源岩的早期综合评价.研究表明:伦坡拉盆地古近系牛堡组烃源岩发育,并以牛二段中亚段分布最广、厚度最大,在蒋日阿错凹陷最厚在400m以上,其中优质烃源岩(TOC1.0%)最厚可达170m;牛堡组总体上属较好级别的烃源岩,其中牛二段上亚段较好-优质烃源岩所占比例最高,牛二段中亚段次之;牛堡组烃源岩有机质类型以Ⅰ型和Ⅱ_1为主;有机质成熟度总体呈中西部高、东部低的趋势,牛二段中亚段烃源岩现今多处于中-晚期生油阶段,牛二段上亚段和牛三段下亚段烃源岩现今多处于早期生油阶段.牛二段中亚段烃源岩为伦坡拉盆地主力烃源岩,蒋日阿错凹陷为最重要的生烃凹陷.
[Abstract]:The Lunpola basin is the only basin in Tibet where industrial oil flow is obtained. The prospect of oil and gas exploration is broad, but its exploration and research degree is low, and the development of source rock of Niubu formation in Paleogene is not clear. It restricts the potential evaluation and exploration selection of oil and gas resources in the basin. By studying the data of drilling, logging and related laboratory tests, and using the techniques of logging multi-parameter regression and basin numerical simulation, the characteristics of organic matter abundance, types and distribution of the main submember of Niubu formation are analyzed. The thermal maturation evolution history of source rocks was reconstructed by simulation and the early comprehensive evaluation of Niubu formation source rocks in Luompola basin was realized. The results show that the source rocks of the Niubu formation of Paleogene in Luompola Basin are developed, and the middle segment of the second member of Niu is the most widely distributed and the thickness is the largest, and the thickest in Jiangri Acao depression is more than 400 m. The thickness of high quality source rock (TOC 1.0%) is up to 170 m.The Niupu formation is generally a good source rock, in which the upper submember of the Niu member is better than the high quality source rock, followed by the central member of the second member of Niu member. The organic matter types of Niubu formation source rocks are mainly type 鈪，

本文编号：2103612