徐深气田兴城区块营城组天然气成藏主控因素研究

发布时间：2018-05-15 21:15

  本文选题：天然气 + 主控因素　； 参考：《东北石油大学》2017年硕士论文

【摘要】：徐家围子断陷是松北深层天然气的主要勘探区,特别是发育于断陷中部沙河子组烃源岩之上的营城组地层,是天然气藏集中分布的区域。随着勘探程度的不断完善,天然气的勘探形势日益严峻,深层火山岩、砾岩储层物性分布复杂,常规的储层预测技术已经不能满足勘探开发要求,这就迫切需要对天然气藏条件的差异性及其主控因素有一个深入透彻的研究,对后期天然气藏的高效合理开发具有重要贡献价值。本文以徐家围子兴城区块营城组为研究对象,以现有的地质、地震、测井、录井、地化、取样、试气资料为基础;以石油地质学、地球物理学、沉积地质学、构造地质学及层序地层学等为理论指导;以非线性空变子波宽频带井约束多参数储层反演处理技术为研究手段,对天然气成藏条件、气藏类型与分布规律以及天然气藏主控因素开展研究。综合研究取得如下结论及认识:研究区沙河子组热演化史表明,深层断陷现今地层的Ro大都超过了2.0%,处于高过成熟阶段,有机质已大量向烃类转化。深层烃源岩样品有机质类型大多以Ⅲ型为主,有机质成熟度沙河子组和营城组都达到过成熟阶段,烃源岩已经经历了大量生、排烃期,目前有生烃潜力的源岩潜也是以生气为主。研究区气藏类型为构造-岩性气藏,气藏内部由于储层不均质,连通性差,以营四段砾岩储层和营一段火山岩顶面风化壳储层为主要含气层。营四段砾岩气层无底水,边水亦不明显;营一段火山岩气水层垂向分布为上气下水,有明显的边水。天然气藏的形成及分布多重因素控制,源岩控制着天然气的分布范围和排气强度,生气量与烃源岩发育密切相关,烃源岩厚度大的断陷生气潜力大;储层为天然气藏提供储集空间,不同层段储层类型以及厚度不同天然气储集程度有差异;断盖配置关系控制天然气藏聚集层位,天然气藏绝大部分富集在登二段泥岩盖层之下的营城组三四段储层中,这主要是上覆盖层横向分布连续所致。
[Abstract]:Xujiaweizi fault depression is the main exploration area of deep natural gas in Songbei, especially the Yingcheng formation, which is developed above the source rocks of Shahezi formation in the middle of the fault depression, and is the area where the natural gas reservoirs are concentrated and distributed. With the continuous improvement of exploration degree, the exploration situation of natural gas is increasingly severe, the physical distribution of deep volcanic rock and conglomerate reservoir is complex, the conventional reservoir prediction technology can no longer meet the requirements of exploration and development. Therefore, it is urgent to have a thorough and thorough study on the difference of gas reservoir conditions and its main controlling factors, which has important contribution value to the high efficiency and reasonable development of the gas reservoir in the later stage. This paper takes Yingcheng formation in Xujiaweizi Xingcheng block as the research object, based on the existing geological, seismic, logging, geochemistry, sampling, gas testing data, petroleum geology, geophysics, sedimentary geology. The structural geology and sequence stratigraphy are used as the theoretical guidance, and the reservoir forming conditions of natural gas are studied by using the inversion processing technique of nonlinear space-variant wavelet wide-band well constrained multi-parameter reservoir. The types and distribution of gas reservoirs and the main controlling factors of natural gas reservoirs are studied. The comprehensive study has obtained the following conclusions and understandings: the thermal evolution history of Shahezi formation in the study area shows that the Ro of the present strata in the deep faulted depression is more than 2.0, which is higher than the mature stage, and the organic matter has been transformed to hydrocarbons in large quantities. Most of the organic matter types of deep source rock samples are type 鈪，

本文编号：1893965