准噶尔盆地中部4区块白垩系清水河组沉积特征研究  

Sedimentary Characteristics of Cretaceous Qingshuihe Formation in Block 4 of Central Junggar Basin

作　　者：陈林[1] 孙怡[1] 许涛[1] 张新见[1] 程长领[1] 

机构地区：[1]中石化胜利油田分公司西部新区研究中心,山东东营257000

出　　处：《石油天然气学报》2014年第2期50-55,6,共6页Journal of Oil and Gas Technology

基　　金：国家科技重大专项(2011ZX05002-002)

摘　　要：准噶尔盆地中部4区块白垩系为一套潜力层系,但研究程度相对较低,制约了该区域的勘探进程。根据测、录井及地震等资料,对准噶尔盆地中部4区块白垩系清水河组(K1q)层序发育特征及沉积相开展了研究。结果表明,K1q可划分为2个三级层序,进而将其分为清水河组一段(K1q1)、二段(K1q2),每个三级层序内又可进一步划分为水进体系域和水退体系域;其中K1q1主要发育辫状河沉积,砂体厚度大,横向分布广,以寻找低幅构造圈闭和岩性超覆体为主要勘探目标;K1q2则主要发育三角洲-滨浅湖滩坝沉积体系,储层整体不甚发育,主要以寻找三角洲和滩坝砂形成的岩性圈闭为主要勘探目标。在相序上,K1q2的三角洲-滨浅湖沉积体系直接覆盖于K1q1的辫状河沉积之上,这一垂向相序在研究区是合理的。The Cretaceous System of Block 4in Central Junggar Basin was a potential formation.But its research degree of sedimentary characteristics was relatively low,which restricted the exploration process of this area.According to well logging,borehole logs and seismic data,the sequence characteristics and sedimentary facies of Qingshuihe Formation of Cretaceous in Block 4of Central Junggar Basin were studied.The results show that Qingshuihe Formation could be divided into two third-order sequences,thus it could be divided into 2 members,such as K1q1and K1q2.Within each third-order sequence,it can be further divided into transgressive system tract and regressive system tract.Braided river sediment was mainly developed in K1q1,where sand body had big thickness and wide distribution,the main exploration targets were to search for low-relief structural traps and lithologic overlap traps.And delta-shore and shallow lake sedimentary systems were mainly developed in K1q2,where reservoirs were not integrally developed,the main exploration targets were lithologic traps formed by delta and beach bar sand.On the phase sequence,the delta-shore and shallow lake sedimentary systems in K1q2directly cover the braided river sediment of K1q1,which is reasonable in the studied area.

关 键 词：准噶尔盆地中部 白垩系 清水河组 层序划分 沉积相 沉积模式 

分 类 号：P618.13[天文地球—矿床学]