长垣南部—古龙地区嫩江组二、三段等时地层格架及其与砂岩展布关系  

RELATIONSHIP BETWEEN THE ISOCHRONOUS STRATIGRAPHIC FRAMEWORK AND SANDSTONE SPREAD FOR MEMBER 2 & 3 OF NENJIANG FORMATION IN SOUTH PLACANTICLINE AND GULONG AREA

作　　者：靳雪燕[1,2] 梁江平[2] 黄清华[2] 解彬[2] 郭会坤[2] 

机构地区：[1]中国地质大学地球科学与资源学院,北京100083 [2]大庆油田有限责任公司勘探开发研究院,黑龙江大庆163712

出　　处：《大庆石油地质与开发》2014年第3期20-24,共5页Petroleum Geology & Oilfield Development in Daqing

基　　金：国家油气重大专项(2011ZX05001-001-04);中国石油股份公司重大专项(2011E-1201)联合资助

摘　　要：大庆长垣南部—古龙地区T06反射层（嫩三段底界）严重穿时,导致对该区沉积和构造特征认识不清,制约了对油气富集规律的认识.通过应用高分辨率层序地层学原理,井震结合,建立了等时地层格架,并分析了其对砂岩的控制作用.认为：该区嫩江组二、三段属于高位体系域,嫩江组二段底界为最大湖泛面,嫩江组三段顶底均为湖泛面;从嫩江组二段上部开始,向上到嫩江组三段共划分为4个四级层序,对应5个砂层组,即H23、H13、H32、H22、H12,表现出5组由东向西的三角洲前缘沉积体系进积层序特征.该区储层发育的有利相带为三角洲前缘相,砂岩主要分布在嫩江组二段上部和嫩江组三段（即H23-H12）,且从下往上呈现逐层由东向西叠覆分布的特征.The serious isochronous events of T06 reflection horizon （Bottom Member Nen-3） lead to the dimnesses of the sedimentary and tectonic features in South Daqing Placanticline and Gulong Area, and moreover they restrict the understandings of the oil and gas enrichment and accumulation regularities. By means of the theory of high-reso- lution sequence stratigraphy and well-commingled seismic inversion, the isochronous stratigraphic framework is es- tablished, and moreover the controlling action of the framework on the sandstone is analyzed. The studies show that Member 2 ＆ 3 of the formation belong to highstand systems tracts, Bottom Member 2 is the maximum lake-flooding surface; Top and Bottom Member 3 are the lake-flooding surfaces. There are altogether 4 grades of the sequence and 5 corresponding groups of the sandstone divided from Top Member 2 to Member 3 in Nenjiang Formation, namt-d H32, H31, H23, H23, H21. The groups are characterized by the progradational sequences of the delta-front sedimentary systems from east to west. The favorable facies belt developed in the reservoirs of this region is the del- ta-front facies, the distribution of the sandstone is mainly on the top of Member 2 and H32- H21 of Member 3 of Nenjiang Formation, and furthermore the reservoir sandstones overlap gradually from bottom to top layer-by-layer and from easl lo west.

关 键 词：大庆长垣南部—古龙地区 嫩江组二、三段 等时地层格架 砂岩展布 

分 类 号：TE121.3[石油与天然气工程—油气勘探]