准噶尔盆地沙湾凹陷西斜坡陆相湖盆重力流沉积特征与油气关系  

Relationship Between Gravity Flow Sedimentary Characteristics and Oil and Gas in Continental Lake Basin on The West Slope of Shawan Sag,Junggar Basin

作　　者：高宇慧[1] 佟莹 黄会会[3] 刘荷冲 黄党委 Gao Yuhui;Tong Ying;Huang Huihui;Liu Hechong;Huang Dangwei(Exploration and Development Research Institute of PetroChina Xinjiang Oilfield Company,Karamay,Xinjiang,8340000,China;Xinjiang Haodeng Technology Co.,Ltd.,Urumqi,Xinjiang,830000,China;Luliang oilfield operation area of PetroChina Xinjiang Oilfield Company,Karamay,Xinjiang,834000,China;Fengcheng oilfield operation area of PetroChina Xinjiang Oilfield Company,Karamay,Xinjiang,834000,China)

机构地区：[1]中国石油新疆油田分公司勘探开发研究院,新疆克拉玛依834000 [2]新疆皓登科技有限公司,新疆乌鲁木齐830000 [3]中国石油新疆油田分公司陆梁油田作业区,新疆克拉玛依834000 [4]中国石油新疆油田分公司风城油田作业区,新疆克拉玛依834000

出　　处：《新疆地质》2022年第3期378-381,共4页Xinjiang Geology

基　　金：国家科技重大专项(2016ZX05003-005)重大专项:股份公司《新疆和吐哈油田勘探开发关键技术研究与应用》下属课题《准噶尔盆地油藏富集规律及勘探技术研究与应用》(2017E-0401)资助。

摘　　要：准噶尔盆地沙湾凹陷早二叠世沉积期发育大面积的砂岩,主要发育砂质碎屑流、浊流等重力流砂体。砂质碎屑流沉积以块状层理为主,单砂体厚度大,浊流沉积以粒序层理为主,砂泥互层频繁。通过陆相湖盆、野外露头剖面、岩心、测井等资料分析,结合重力流沉积背景下各成因砂体测井曲线形态、垂向的发育厚度、连续性及组合特征,确定了沙湾凹陷西斜坡受重力流形成机制、坡折带形态、坡折带古地貌和同沉积断裂的影响,重力流不呈经典的扇形。按形态可分为水道-湖底扇、扇形2大类。并从坡折带及平面形态和地震属性上进行了精细刻画。研究结果表明,扇三角洲前缘亚相水下分流河道为沉积优势相带。砂质碎屑流沉积区虽是油气藏有利聚集分布带,但分布面积较广。进一步确定规模储层发育带,明确了“北河南扇”的沉积特征,为有利区的优选提供了新的研究方向。A large area of sandstone was developed in Shawan sag of Junggar Basin during the sedimentary period,mainly developing gravity flow sand bodies such as sandy debris flow and turbidity flow.Sandy debris flow deposits are mainly massive bedding,single sand body is thick,turbidity current deposits are mainly grain sequence bedding,and sand mud interbedding is frequent.Through the analysis of gravity flow sedimentation theory,field outcrop profile,core,logging and other data in continental lake basin,combined with the logging curve shape,vertical development thickness,continuity and combination characteristics of various genetic sand bodies under the background of gravity flow sedimentation,it is determined that the west slope of Shawan sag is affected by the formation mechanism of gravity flow,the shape of slope break zone,the ancient landform of slope break zone and synsedimentary faults,Gravity flow does not present a classical fan.According to the shape,it can be divided into channel lake bottom fan and fan.The fracture zone,plane shape and seismic attributes are finely characterized.The results show that the subaqueous distributary channel of fan delta front subfacies is a sedimentary dominant facies belt.Although the sandy clastic flow sedimentary area is a favorable accumulation and distribution zone of oil and gas reservoirs,it is widely distributed.Further implement the largescale reservoir development zone,clarify the sedimentary characteristics of"North Henan fan",and provide a new research direction for the optimization of favorable areas.

关 键 词：陆相湖盆 重力流 沉积特征 沙湾凹陷 准噶尔盆地 

分 类 号：P558.2[天文地球—构造地质学] P618.130.2[天文地球—地质学]