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世界地质 2023, 42(3) 527-535 DOI:
ISSN: 1004-5589 CN: 22-1111/P |
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| 基础地质 |
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松辽盆地南部查干花次凹下白垩统火山岩储层特征与发育规律 |
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冷庆磊, 朱建峰, 刘玉虎 |
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中国石化 东北油气分公司, 长春 130062 |
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摘要：
基于岩心及其薄片资料, 结合地震? 物性测试, 探究长岭断陷查干花次凹火石岭组火山岩储层 发育特征和发育规律? 研究表明火山岩发育 3 个喷发期次? 4 大类岩性: 期次 1 为陆上喷发, 以溢流 相夹爆发相为主; 期次 2 为水陆过渡环境喷发, 发育大量火山沉积相; 期次 3 为水下环境喷发, 以水 下爆发相为主? 火山岩储层主要发育在期次 2 火山沉积相的凝灰质砂岩和期次 3 水下爆发相的中??粗 粒凝灰岩中? 中??粗粒凝灰岩储层储集空间以大量脱玻化孔为主, 凝灰质砂岩储层储集空间主要为溶 蚀孔, 2 种类型储层均为微孔型储层, 孔隙中值为 3. 8% , 渗透率中值为 0. 03 × 10 - 3 μm 2 ? 期次 2 凝 灰质砂岩储层空间分布广, 储层呈层状发育; 期次 3 中??粗粒凝灰岩储层在空间上呈透镜状发育在火 山喷发中心附近? |
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关键词：
水下火山喷发
储层特征
火石岭组
查干花次凹
长岭断陷
松辽盆地南部
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Characteristics and development regularity of Lower Cretaceous volcanic rock reservoirs in Chaganhua subsag, southern Songliao Basin
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LENG Qinglei, ZHU Jianfeng, LIU Yuhu |
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Northeast Oil & Gas Branch of SINOPEC, Changchun 130062, China |
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Abstract:
Based on the core and thin section data, combined with the seismic and physical properties tests, the characteristics and development regularity of the volcanic rock reservoirs in the Huoshiling Formation of Chagan? hua subsag, Changling fault depression have been studied. The results show that the volcanic rocks were erupted at three stages with four types of lithology. Stage 1 is a subaerial eruption, mainly dominated by effusive facies and ex? plosive facies. Stage 2 is developed in a transitional eruption environment with a large number of volcanic?sedimen? tary facies. Stage 3 is a subaqueous environment eruption, which is dominated by subaqueous explosive facies. Volcanic rock reservoirs are mainly developed in tuffaceous sandstones of the volcanic sedimentary facies (stage 2) and medium?coarse grained tuffs of the subaqueous explosive facies ( stage 3). The reservoir space of middle? coarse grained tuff reservoir is dominated by a large number of devitrified pores, while the reservoir space of tuf? faceous sandstone reservoir is dominated by dissolution pores. Both types of reservoirs are microporous reservoirs, with a medium pore value of 3. 8% and a median permeability value of 0. 03 × 10 - 3 μm 2 . The tuffaceous sandstone reservoirs of stage 2 are widely distributed and stratified. The middle?coarse grained tuff reservoirs of stage 3 are de? veloped lenticular in space and developed near the volcanic eruption center. |
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Keywords:
subaqueous volcanic eruption
reservoir characteristics
Huoshiling Formation
Chaganhua sub? sag
Changling fault depression
southern Songliao Basin
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