四川盆地南部花果山地区嘉陵江组储层特征与成岩作用  

Reservoir characteristics and diagenesis of the Jialingjiang Formation in the Huaguoshan region,southern Sichuan Basin

作　　者：隆辉[1] 邓飞涌[1] 廖小丽 张强[1] 耿超 沈秋媛 LONG Hui;DENG Fei-yong;LIAO Xiao-li;ZHANG Qiang;GENG Chao;SHEN QIU-yuan(Shunan Gas Field,Southwest Oil and Gas Field Co.,Ltd.,Petrochina,Luzhou 646000,Sichuan,China)

机构地区：[1]西南油气田分公司蜀南气矿,四川泸州646000

出　　处：《沉积与特提斯地质》2018年第3期41-50,共10页Sedimentary Geology and Tethyan Geology

摘　　要：在对四川盆地南部嘉陵江组沉积背景认识的基础上,通过大量岩心观察、薄片鉴定、扫描电镜观察,结合孔隙度、渗透率分析测试结果,对泸州古隆起花果山地区嘉陵江组主要储集层段的储层特征及成岩作用进行研究。结果表明:(1)花果山地区嘉陵江组顶底界面清楚,主要产层为嘉一和嘉二段,储集层岩性为粉晶含泥质粒屑白云岩及亮晶粒屑灰岩、细粉晶灰岩,孔隙类型以晶间(溶)孔为主,总体以低孔低渗的Ⅲ类储层为主,储集空间类型主要为裂缝-孔隙型;(2)按成岩作用是否形成孔、缝等储集空间和是否对油气的生、储、运有贡献,将成岩作用划分为建设性成岩作用、破坏性成岩作用和保持性成岩作用,并对孔隙成因做出分析,并找出岩石学证据;(3)准同生和表生阶段的大气淡水作用是形成储层的基础,白云石化作用和埋藏溶蚀对孔隙的发育具有重要的建设性作用,古隆起时期的构造破裂作用能够为溶蚀性流体提供运移通道,有利于溶蚀作用的进行;(4)综合考虑不同成岩作用先后次序,以及次生矿物之间的切割、伴生以及交代关系,对成岩演化史和孔隙演化史进行了恢复。With the aid of analytical results of core samples,thin sections,scanning electron microscopy analysis,porosity and permeability,the present paper gives a detailed description of the reservoir characteristics and diagenesis of the Jialingjiang Formation in the Huaguoshan region,southern Sichuan Basin.The boundaries between the top and bottom of the Jialingjiang Formation are well defined,and the first and second members of the Jialingjiang Formation occur as the main reservoir rocks.Lithologically,the reservoir rock types principally consist of muddy dolosiltite,sparry calcrudite and calcisiltite.The pore types comprise intercrystal pores(solution openings)and intragranular solution openings.The reservoir spaces types contain the porosity type and fissure-porosity type.The hydrocarbon reservoirs are dominated by the III-type reservoirs with low porosity and low permeability.The diagenesis may be separated into constructive diagenesis,destructive diagenesis and retentive diagenesis.The meteoric water serves as the basis of the formation and development of the hydrocarbon reservoirs in the penecontemporaneous and supergene stages.The dolomitization and burial dissolution play an important constructive part in the formation and development of pores and fissures.The structural fractures may provide the channels for the migration of dissolved fluids.The restoration of diagenetic evolution and porosity evolution is based on the diagenetic sequences,and the dissection,accompanying,accompaniment(association)and replacement of the secondary minerals.

关 键 词：四川盆地南部 泸州古隆起 嘉陵江组 成岩作用 

分 类 号：TE122[石油与天然气工程—油气勘探]