首页|页岩储集性与含油性的毫米级精细评价及意义——以松辽盆地青山口组一段为例

页岩储集性与含油性的毫米级精细评价及意义——以松辽盆地青山口组一段为例

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开展页岩储集性与含油性的毫米级精细评价对研究页岩油的富集特征具有重要意义.以松辽盆地古龙凹陷青山 口组一段(青一段)中—高成熟页岩为研究对象,开展了微区X射线荧光光谱、岩石薄片观察、低温氮气吸附实验、高压压汞实验、岩石热解分析和总有机碳含量测定等一系列分析实验.研究结果表明:古龙凹陷青一段重点勘探层段的纹层状和层状页岩中主要发育方解石+黏土矿物纹层、黏土矿物纹层、方解石纹层、长英质纹层、黏土矿物层、黄铁矿层和白云石+黏土矿物层;黏土矿物常与有机质构成有机-黏土矿物复合体,两者之间相互作用,使得黏土矿物纹层/层和方解石/白云石+黏土矿物纹层/层相对于方解石纹层、长英质纹层和黄铁矿层具有更大的孔体积和比表面积,即该类纹层/层中具有更大的页岩油赋存空间,且游离烃含量和轻烃的占比也相对更高.研究明确了黏土矿物和有机质含量是影响古龙凹陷青一段页岩储集性和含油性的主要因素,建议将富有机质、富黏土矿物页岩层段作为勘探首选对象.
Millimeter-scale fine evaluation and significance of shale reservoir performance and oil-bearing property:a case study of Member 1 of Qingshankou Formation in Songliao Basin
Millimeter-scale fine evaluation of shale reservoir performance and oil-bearing property is of great significance for studying the enrichment characteristics of shale oil.This study targets at the medium to high maturity shale in Member 1 of Qingshankou For-mation in Gulong sag of Songliao Basin.A series of analytical experiments were carried out,including micro-X-ray fluorescence spec-troscopy,rock thin section observation,low-temperature nitrogen adsorption,high-pressure mercury injection,rock pyrolysis,as well as measurement of total organic carbon content.The results show that calcite+clay mineral lamina,clay mineral lamina,calcite lamina,felsic lamina,clay mineral layer,pyrite layer,and dolomite+clay mineral layer are mainly developed in the laminated and layered shale in key exploration sections of the study area.The combination of clay minerals and organic matter can always form or-ganic-clay complexes,and the interaction between the both results in the formation of clay mineral lamina/layer and calcite/dolomite+clay mineral lamina/layer with larger pore volume and specific surface area,when compared with calcite,felsic,and pyrite lamina/layer.It is verified that clay mineral and organic matter content are the main factors affecting shale reservoir shale reservoir perform-ance and oil-bearing property in the study area.It is suggested that the shale strata rich in organic matter and clay mineral should be the preferred target for exploration.

shalereservoir performanceoil-bearing propertymillimeter-scale fine evaluationMember 1 of Qingshankou Forma-tionSongliao Basin

王鑫、蒙启安、白云风、张金友、王民、刘召、孙先达、李进步、许承武、徐亮、邓仔晓、吴艳、卢双舫

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深层油气全国重点实验室(中国石油大学(华东))山东青岛 266580

大庆油田有限责任公司 黑龙江大庆 163318

东北石油大学 黑龙江大庆 163318

页岩 储集性 含油性 毫米级精细评价 青山口组一段 松辽盆地

国家自然科学基金项目国家自然科学基金项目国家自然科学基金项目山东省青岛市博士后应用研究项目

419220154207214742102154ZX20210070

2024

10.7623/syxb202406006

石油学报
中国石油学会

石油学报

CSTPCD北大核心
影响因子：3.438
ISSN：0253-2697
年,卷(期)：2024.45(6)
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