Division of diagenesis reservoir facies and its control——Case study of Chang-3 reservoir in Yangchang formation of Fuxian exploration area in northern Shaanxi

作     者：FU Guo-min QIN Xiao-li MIAO Qing ZHANG Tian-jin YANG Jian-peng 

作者机构：lnstitute of Resources Chang ＇an University Xi＂ an Shaanxi 710054 China Zhongyuan Oil Field Company Sinopec Puyang Henan 457001 China Department of Geology and Environment Engineering Xi＇ an University of Science and Technology Xi＇ an Shaanxi 710054 China yanchang Oilfield Limited-Liability Company Yan ＇an Shaanxi 716000 China 

出 版 物：《Mining Science and Technology》 (矿业科学技术（英文版）)

年 卷 期：2009年第19卷第4期

页      面：537-543页

核心收录：

学科分类：081803[工学-地质工程] 08[工学] 0818[工学-地质资源与地质工程] 

主　　题：diagenesis laumontite diagenetic facies Yanchang formation northern Shaanxi province 

摘      要：By dividing the diagenetic reservoir facies and studying its distribution,we can effectively evaluate *** an analytical method for mutual relationships among diagenesis of reservoirs,structural characteristics and the origin of types of sand,we classified the diagenetic reservoir of the Yanchang formation Chang-3 oil layer into different types and analyzed the factors controlling this high quality *** results show that:1) the catagenesis of the Chang-3 oil layer in the Fuxian region is complex and variable;2) mechanical compaction,pressure solutions and cementation of all kinds of authogenous minerals decreases porosity by 28.13% and 3) corrosion increases porosity by 3.39%.Cementation and corrosion of laumontite is a kind of catagenesis which makes this region different from other exploratory *** original amount and rate of corrosion of laumontite are the main factors for the increase in laumontite *** Chang-3 oil layer developed four kinds of diagenetic reservoir facies,of which the weak compaction facies,i.e.,laumontite corrosion and overgrowth,of the original pore reservoir facies has the most promising *** distribution is controlled by a sedimentary facies zone and is widely developed in the original truncated tributary channel facies belt of the delta *** development of this high quality reservoir is controlled by the distribution of sedimentary sand bodies and secondarily-eroded porosity of laumontite in the Chang-3 oil layer of the Fuxian exploratory region.