龙岗地区中三叠统雷四~3亚段储层特征及控制因素

发布时间：2018-03-22 16:49

本文选题：储层类型　切入点：储层特征　出处：《岩性油气藏》2016年06期 　论文类型：期刊论文

【摘要】：对龙岗地区中三叠统雷口坡组雷四3亚段储层的研究,有助于认识受雷口坡组顶部不整合面风化壳影响的储层特征,并可通过与邻区对比,分析该区域不整合面对四川盆地其他地区雷口坡组顶部储层的影响。根据岩心观察与描述、薄片鉴定和锶同位素测试,结合测井与储层物性等资料,论述了龙岗地区雷四3亚段储层特征及控制因素。同时,简要讨论了四川盆地不同地区雷四3亚段的储层特征及控制因素。结果表明,龙岗地区雷四3亚段储层的岩性主要为膏溶角砾状白云岩与颗粒白云岩,储层物性总体较差,储集空间主要为膏溶铸模孔、粒间(内)溶孔及晶间(溶)孔,储层控制因素主要为蒸发台地相膏岩和台地内局部微地貌高地颗粒岩的沉积作用、印支期抬升后的表生岩溶作用与充填作用。在紧邻龙岗的元坝地区,雷四段储层具有与龙岗地区相似的特征与控制因素;川西坳陷中部和川西坳陷南部则与龙岗地区不同,其顶部地层受印支期不整合面岩溶作用影响减弱,储层分别受控于台地边缘微生物礁滩相与海平面升降控制的颗粒滩相沉积作用。
[Abstract]:The study on the reservoir of Leikoupo formation in the middle Triassic of Longgang area is helpful to the understanding of the reservoir characteristics affected by the weathering crust of the unconformable surface at the top of the Laikoupo formation, and can be compared with the adjacent area. This paper analyzes the influence of the unconformity of this region on the top reservoir of the Leikoupo formation in other areas of Sichuan basin. According to the observation and description of the core, thin slice identification and strontium isotope test, combined with the data of logging and reservoir physical properties, etc. In this paper, the reservoir characteristics and controlling factors of Lai4 3 submember in Longgang area are discussed. At the same time, the reservoir characteristics and controlling factors of Lai4 3 submember in different areas of Sichuan basin are briefly discussed. In Longgang area, the lithology of the reservoir is mainly composed of gypsum breccia dolomite and granulated dolomite, and the reservoir space is mainly composed of gypsum cast mold pore, intergranular (inner) dissolved pore and intergranular (dissolved) pore. The reservoir controlling factors are mainly the deposition of evaporative platform facies gypsum and local microgeomorphologic highland granulites in the platform, the supergene karstification and filling after the Indosinian uplift. The reservoir of the fourth member of Lei has similar characteristics and controlling factors as the Longgang area, while the central part of the western Sichuan depression and the southern part of the western Sichuan depression are different from the Longgang area, and the top strata of the reservoir are weakened by the karstification of the Indosinian unconformity surface. The reservoir is controlled by microorganism reef facies and granular beach facies controlled by sea level rise and fall respectively.
【作者单位】：油气藏地质及开发工程国家重点实验室(成都理工大学);中国石油大庆油田有限责任公司井下作业分公司;成都理工大学能源学院;
【基金】：中国地质调查局项目“西部大型盆地碳酸盐岩油气区带地质调查”(编号:121201021000150009)资助
【分类号】：P618.13

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