川东南涪陵地区长兴组储层特征与形成主控因素  

RESERVOIR CHARACTERISTICS AND ITS CONTROLLING FACTORS OF CHANGXING FORMATION IN FULING AREA,SOUTHEASTERN SICHUAN BASIN

作　　者：曾婷婷[1,2] 唐德海[2] 郑公营[3] 

机构地区：[1]成都理工大学能源学院,四川省成都市610041 [2]中国石化勘探南方分公司 [3]中国石化西南油气分公司勘探开发研究院德阳分院

出　　处：《天然气勘探与开发》2012年第4期11-14,7-8,共4页Natural Gas Exploration and Development

摘　　要：运用钻井岩心观察、铸体薄片观察、压汞分析等方法,结合测井、录井及地震资料,对研究区长兴组沉积相带展布与储层发育特征进行了研究。结果表明:长一期,台缘礁滩相带主要发育于涪陵兴隆场南部地区;长二期,台缘礁滩相带主要发育于兴隆场北部,台缘礁滩相和台内生屑滩相为储层发育有利的沉积相带。储层岩性主要为残余生屑白云岩、(残余海绵)细粉晶白云岩、生屑灰岩、白云质灰岩;储集空间类型以溶蚀孔隙为主,次为溶洞;储层类型为裂缝-孔隙型,属中孔-中低渗储层,综合评价为Ⅱ、Ⅲ类储层。优质储层发育受沉积相、白云石化及溶蚀作用等因素控制。Through casting thin-section observation,and core and mercury-injection analysis,both the distribution of sedimentary facies belt and the growth characteristics of Changxing Formation are explored for the study area based on well-logging,mud-logging and seismic data.Results show that(1) during a period of Changxing 1 Member,reef beach facies belt in the marginal platform was mainly developed in the southern Xinglongchang,Fuling area;(2) during another period of Changxing 2 Member,the reef beach facies belt,was mainly developed in the north,and the biodetritus beach facies within the platform were sedimentary facies belts favorable for reservoir growth;(3) reservoir is dominantly composed of residual bioclastic limestone,(residual cavernous) crystal dolomite,bioclastic dolomite and dolomitic limestone;(4) dissolution pore is the main reservoir space,karst cave for the second;(5) reservoir is fractured-porous one,with middle porosity and permeability,and belongs to II-and III-type;and(6) the growth of high-quality reservoir is affected by sedimentary facies,dolomitization and dissolution.

关 键 词：涪陵 长兴组 储层 储层主控因素 

分 类 号：P618.13[天文地球—矿床学]