我国不同沉积类型储集层中的储量和可动剩余油分布规律

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研究中国不同沉积类型储集层中的储量和可动剩余油分布规律,了解储集层非均质性对剩余油的控制作用,是储集层精细描述和不同类型储集层剩余油挖潜的基础。按河流相、三角洲相、扇三角洲相、滩坝相、湖底扇(浊积)相、冲积扇相和基岩(包括变质岩、火山岩和岩浆岩)七大类储集层,研究了中国15个主要油区71个油田的原始地质储量、水驱标定采收率、水驱油效率和可动剩余油储量等油藏参数在各类储集层中的分布规律。统计结果表明,中国已探明和投入开发储量的92%赋存于陆源碎屑岩储集层中;各类陆源碎屑岩储集层中的原始地质储量分布情况是:河流相42.6%,三角洲相30%,扇三角洲相5.4%,滩坝相1.4%,湖底扇(浊积)相6.3%,冲积扇(冲积—河流)相6.4%,基岩8%。各类碎屑岩储集层中可动剩余油储量的分布情况是:河流相48.6%,三角洲相27.6%,扇三角洲相5.5%,滩坝相1.8%,湖底扇(浊积)相9.6%,冲积扇(冲积—河流)相6.9%。此外还分析对比了各类碎屑岩储集层的平均水驱标定采收率、平均水驱油效率。结果表明,三角洲相、扇三角洲相和湖底扇相三大类储集层是中国今后储集层研究的重点及调整挖潜的主要对象。图1表3参4(邹冬平摘) Studying the distribution of reserves and movable residual oil in reservoirs of different sedimentary types in China and understanding the control effect of reservoir heterogeneity on remaining oil are the detailed description of reservoirs and the tapping potential of remaining oil in different types of reservoirs basis. According to the seven major types of reservoirs, such as fluvial facies, delta facies, fan delta facies, beach dam facies, sublacustrine fan (turbidite) facies, alluvial fan facies and bedrock (including metamorphic rocks, volcanic rocks and magmatic rocks) The distribution of the reservoir parameters such as original geological reserves, waterflooding calibration recovery, waterflooding efficiency and movable residual oil reserves in 71 reservoirs of the main oil zones in all kinds of reservoirs. The statistical results show that 92% of China’s proved and put into development reserves occur in terrigenous clastic rock reservoirs. The distribution of the original geological reserves in various terrigenous clastic reservoirs is: river phase 42.6 %, Delta 30%, fan delta 5.4%, beach dam 1.4%, subduction fan (turbidite) 6.3%, alluvial fan (alluvial-fluvial) 6.4%, bedrock 8%. The distribution of movable residual oil reserves in various clastic reservoirs is as follows: 48.6% of the river phase, 27.6% of the delta phase, 5.5% of the fan delta, 1.8% of the dam, and the bottom of the lake Fan (turbid volume) phase 9.6%, alluvial fan (alluvial - river) phase 6.9%. In addition, the average waterflooding calibration recovery and the average waterflooding efficiency of various clastic reservoirs were analyzed and compared. The results show that three major types of reservoirs, delta phase, fan delta phase and sublacustrine fan phase, are the main research topics of reservoir in China in the future and the major targets of adjustment and tapping potentials. Figure 1 Table 3 Reference 4 (Zou Dongping pick)
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