苏里格气田储层流动单元规模与连通性研究

发布时间：2018-11-17 18:04

【摘要】：针对苏里格气田各类储层流动单元质量与规模认识不清等问题,运用聚类分析方法,对取心井流动单元的储层参数进行聚类分析,将流动单元划分为3类,结合其岩心及镜下薄片分析,剖析3类流动单元的岩性特征、储层质量与渗流特征。利用储层地质知识库对流动单元平面形状进行论证,利用测录井资料统计其垂向发育规模,进而求取其规模范围。同时,基于试井和产量不稳定分析方法,界定其主要渗流平面规模。提出面状指数概念,定量表征了流动单元的连通性,通过反推计算,验证流动单元的规模范围。研究结果表明:该区流动单元长宽比为2.0~2.5,宽厚比为60左右,垂向连续厚度为3~7m,平面规模为0.10~0.44 km~2,渗流平面规模为0.2~0.3 km~2;后期井网加密范围应控制在0.3 km~2左右。该研究结果与方法对后期井网加密、识别连通砂体具有一定的指导意义。
[Abstract]:Aiming at the problems of unclear understanding of the quality and scale of flow units of various reservoirs in Sulige gas field, the reservoir parameters of flow units in coring wells are analyzed by cluster analysis method, and the flow units are divided into three categories. The lithologic characteristics, reservoir quality and percolation characteristics of the three types of flow units are analyzed based on the core and microscopical analysis. Using the reservoir geological knowledge base to demonstrate the plane shape of the flow unit and using the logging data to calculate its vertical development scale and then to obtain its scope of scale. At the same time, the main seepage plane scale is defined based on well test and production instability analysis method. The concept of plane index is put forward and the connectivity of flow unit is quantitatively characterized. The scale range of flow unit is verified by backstepping calculation. The results show that the aspect to width ratio of flow unit in this area is 2. 0 ~ 2. 5, the ratio of width to thickness is about 60, the vertical continuous thickness is 3 ~ 7 m, and the plane scale is 0. 10 ~ 0. 44 km~2, seepage plane scale is 0. 2 ~ 0. 3 km~2;. The infilling range of well pattern should be controlled at about 0. 3 km~2. The research results and methods have certain guiding significance for later well pattern infill and identification of connected sand bodies.
【作者单位】：山东科技大学;北京师范大学;
【基金】：国家自然科学基金“水淹油环地下储气库高速注采过程中损失气赋予规律及表征方法研究”(51504143)
【分类号】：TE311

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