苏里格大气田盒8段、山1段气藏含气控制因素研究

发布时间：2018-04-08 09:45

本文选题：苏里格气田　切入点：含气性　出处：《西北大学学报(自然科学版)》2017年02期

【摘要】：依据油气成藏理论分析苏里格气田上古生界盒8段、山1段气藏的气水分布特征。研究结果表明,研究区各成藏要素对含气性的控制程度具有差异性,其中生烃强度、源储配置等因素决定了不同区域、不同层位气水分布差异的总格局;砂体的展布形态决定了气藏分布的空间形态为大面积分布、纵向多层叠置的岩性集群式成藏。在微观尺度下,物性的致密性及非均质性决定了天然气与地层水在储层内"弥漫式"分布,且不同部位的含气饱和度不均一;同等级别的孔隙度与渗透率条件下,大孔大喉的相对含量与含气饱和度呈正相关;由于充注方式的不同,储层之间的含气性也可能存在相对性差异。受成藏要素在不同区带、不同层段的差异性及共同作用的控制,研究区气藏表现为空间分布不稳定,气水含量不统一,气藏的形态介于连续与不连续之间。研究认为,苏里格气田盒8段、山1段气藏类型为准连续型致密砂岩气。
[Abstract]:Based on the oil and gas accumulation theory, the gas and water distribution characteristics of Upper Paleozoic Ke 8 and Shan 1 gas reservoirs in Sulige gas field are analyzed.The results show that there are differences in the degree of controlling the gas-bearing properties among the factors of reservoir formation in the study area, in which hydrocarbon generation intensity, source storage configuration and other factors determine the general pattern of gas-water distribution differences in different regions and different horizons.The distribution form of sand body determines that the space form of gas reservoir distribution is large area distribution, and the lithologic cluster reservoir is formed by longitudinal multi-layer superposition.On the micro scale, the density and heterogeneity of physical properties determine the "diffuse" distribution of natural gas and formation water in the reservoir, and the gas saturation is not uniform in different parts, and under the condition of the same level of porosity and permeability, the density and heterogeneity of physical properties determine the distribution of natural gas and formation water in the reservoir.The relative content of macropore and larynx is positively correlated with gas saturation, and there may be relativistic differences between reservoirs due to the different filling modes.Controlled by the difference and interaction of reservoir forming elements in different zones and different layers, the gas reservoirs in the study area are characterized by unstable spatial distribution, disunity of gas and water content, and the shape of the gas reservoir is between continuous and discontinuous.It is considered that the gas reservoir type of Sulige gas field is quasi-continuous tight sandstone gas.
【作者单位】：西北大学大陆动力学教育部重点实验室/地质学系;陕西延长石油集团;陇东学院;
【基金】：国家自然科学基金资助项目(41372128) 甘肃省科技计划基金资助项目(1606RJZM092) 甘肃省高校科研基金资助项目(2014B-092)
【分类号】：P618.13

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