川东北飞仙关组鲕滩储层沥青与天然气成藏过程  

FEIXIANGUAN FORMATION OOLITIC BEACH RESERVOIR BITUMENS AND GAS RESERVOIRING PROCESS IN NORTHEAST SICHUAN

作　　者：谢增业[1] 魏国齐[1] 李剑[1] 杨威[1] 张林[1] 

机构地区：[1]中国石油勘探开发研究院廊坊分院

出　　处：《天然气工业》2004年第12期17-19,共3页Natural Gas Industry

基　　金："十五"国家重点科技攻关项目 (编号 2 0 0 1BA6 0 5A - 0 4 );国家"973"项目 (编号 2 0 0 1CB2 0 913);中国石油天然气集团公司天然气成藏与开发重点实验室资助项目

摘　　要：文章在古地貌格局研究基础上 ,以流体势和储层沥青为依据 ,分析了四川盆地东北部下三叠统飞仙关组鲕滩气藏形成过程。应用有机岩石学和有机地球化学方法对储层沥青进行了系统的研究。这些沥青为液态烃类裂解后的残留物 ,其含量呈规律性变化。各类型岩石中 ,储集孔隙发育的残余鲕粒白云岩中的沥青含量最高 ,其高低与原始液态烃类聚集的多少有关。沥青含量与天然气产量、气藏规模及储层物性之间呈正相关关系。古隆起和储层控制着天然气的运移富集。鲕滩气藏的形成可分为岩性—构造型和构造型两种成藏模式。前一类型包括罗家寨、渡口河及铁山坡等储集性能好的气藏 ;后一类型以金珠坪气藏为代表。鲕滩气藏属于印支晚期—燕山期聚油气。Feixianguan Formation (Lower Triassic) oolitic beach gas reservoir is a large-sized one found in Sichuan Basin at present. On the basis of studying palaeogeo-morphologic pattern, the gas reservoiring process was analyzed in light of fluid potentials and reservoir bitumens. The reservoir bitumens were systematically studied by applying the organic petrologic and organic geochemical methods. These bitumens are the remnants of cracking liquid hydrocarbons. The bitumen content shows a regular change and it is the largest in the pore-developed residual oolitic dolomite among various kinds of rocks, the bitumen abundance being related to the amount of the liquid hydrocarbons accumulated originally. The bitumen content is positively correlated with gas production, gas reservoir size and petrophysical property. Gas migration and accumulation were controlled by ancient uplift and reservoir property. The oolitic beach gas reservoir formation may be divided into two reservoiring models, i. e. lithologie-structural model and structural model. The former includes these gas reservoirs with good petrophysical property in Luojiazhai, Dukouhe and Tieshanpo fields, and the latter is represented by the reservoir in Jinzhuping gas field. The oolitic beach gas reservoirs belong in the late reservoiring type, in which the hydrocarbons had been accumulated during Late Indo-Chinese epoch - Yanshan movement, and the reservoirs were adjusted and finalized during Himalayan movement.

关 键 词：飞仙关组鲕滩 储层 气藏 储集性能 下三叠统 燕山期 古地貌 川东北 天然气成藏 液态烃 

分 类 号：P618.13[天文地球—矿床学]