辽河西部凹陷沙河街组页岩油聚集条件及资源计算

发布时间：2018-06-16 07:03

本文选题：西部凹陷 + 沙河街组　；参考：《地学前缘》2016年01期

【摘要】：为查明辽河坳陷西部凹陷页岩油勘探潜力,明确页岩油富集控制因素,分析了沙三段页岩油成藏条件。以沙三段泥页岩为研究对象,通过FIB-SEM、自动氦孔隙度测定及BET-BJH等测试手段,结合地震、测井资料,以富有机质泥页岩生烃潜力、储集性能及含油性评价为重点,对辽河西部凹陷沙河街组页岩油资源计算方法进行探讨。分析结果表明:(1)TOC含量1.0%~8.54%,众值为2.15%;Ro为0.32%~1.57%,众值为0.65%,处于生油窗内;(2)泥页岩发育粒间孔、粒内孔和微裂缝等6种微孔缝类型,其中微孔以3.9~20nm的中孔为主;(3)西部凹陷沙三段发现工业油流1处,富含油2层,油斑16层,具有较好的含油性;(4)结合概率统计、类比法、权重赋值等手段,利用单元划分—分步计算—累加求和原理,初步探讨了页岩油资源计算方法——单元计算法。通过方法试用,认为沙三段具有较好的页岩油成藏条件和勘探前景。在辽河坳陷页岩油勘探实践中,宜将有机碳含量高、成熟度适中、孔渗性好及含油率高的区域作为有利选区优先领域,尽量避免热演化程度低、黏土矿物含量高的区域。
[Abstract]:In order to find out the exploration potential of shale oil in the western sag of Liaohe depression and determine the controlling factors of shale oil enrichment, the reservoir forming conditions of shale oil in the third member of Shahejie formation were analyzed. By means of FIB-SEM, automatic helium porosity measurement and BET-BJH, combined with seismic and logging data, the evaluation of hydrocarbon generation potential, reservoir performance and oil-bearing property of organic rich shale is emphasized. The calculation method of shale oil resources of Shahejie formation in western Liaohe sag is discussed. The analysis results show that the TOC content of 1: 1 / 1 is 1.0% 8.54, with a range of 2.15 and R _ o = 0.32 ~ 1.57 and 0.65 / 0.57, respectively.) the shale mud has developed intergranular pores, intragranular pores and micro-fractures, etc., and has six types of micropore fractures, such as intergranular pores, intragranular pores and micro-fractures, etc. Among them, the micropore is mainly the middle hole of 3.9~20nm. In the third member of Shahejie formation in the western sag, the industrial oil flow is found in one place, rich in oil layer 2 and oil spot in 16 layers, with good oil-bearing properties.) combining with probability statistics, analogy method, weight assignment and so on, Based on the principle of unit partition, step calculation and accumulation, the element calculation method for shale oil resources is discussed. It is considered that the third member of Shahejie formation has good reservoir forming conditions and exploration prospect. In the exploration practice of shale oil in Liaohe Depression, the areas with high organic carbon content, moderate maturity, good porosity and high oil content should be regarded as favorable priority areas, and regions with low thermal evolution and high clay content should be avoided as far as possible.
【作者单位】：中国地质调查局油气资源调查中心;中国地质大学(北京)能源学院;国土资源部页岩气资源战略评价重点实验室;
【基金】：国家自然科学基金项目(41272167)
【分类号】：P618.13

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