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湖盆凹陷区砂质碎屑流沉积特征与模式——以准噶尔盆地盆1井西凹陷侏罗系三工河组为例
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  • 英文篇名:Sedimentary characteristics and model of sandy debris flow in depression area of lacustrine basin:A case study of the Jurassic Sangonghe formation in the western well Pen-1 sag, Junggar basin
  • 作者:孙靖 ; 薛晶晶 ; 厚刚福 ; 吴爱成 ; 宋明星 ; 朱峰
  • 英文作者:SUN Jing;XUE Jingjing;HOU Gangfu;WU Aicheng;SONG Mingxing;ZHU Feng;Research Institute of Exploration and Development,PetroChina Xinjiang Oil Field Company;PetroChina Hangzhou Institute of Geology;Urumqi Branch, BGP Inc., China National Pertoleum Corporation;
  • 关键词:砂质碎屑流 ; 沉积特征 ; 沉积模式 ; 准噶尔盆地 ; 盆1井西凹陷 ; 侏罗系 ; 三工河组
  • 英文关键词:sandy debris flow;;sedimentary characteristics;;sedimentary model;;Junggar basin;;western well Pen-1 sag;;Jurassic;;Sangonghe formation
  • 中文刊名:ZGKD
  • 英文刊名:Journal of China University of Mining & Technology
  • 机构:中国石油新疆油田分公司勘探开发研究院;中国石油杭州地质研究院;中国石油集团东方地球物理公司研究院乌鲁木齐分院;
  • 出版日期:2019-02-27 10:24
  • 出版单位:中国矿业大学学报
  • 年:2019
  • 期:v.48;No.229
  • 基金:“十三五”国家科技重大专项(2017ZX05001-004);; 中国石油天然气集团公司新疆重大科技专项(2017E-0401)
  • 语种:中文;
  • 页:ZGKD201904018
  • 页数:12
  • CN:04
  • ISSN:32-1152/TD
  • 分类号:169-180
摘要
为明确湖相含油气沉积盆地凹陷区半深水—深水环境储层砂体沉积特征、模式以及岩性地层型油气藏新目标区勘探前景,以准噶尔盆地盆1井西凹陷为例,系统总结国内外砂质碎屑流研究成果和认识,以岩心、录井、测井和地震资料为基础,剖析侏罗系三工河组二段储层砂体沉积背景、识别标志、沉积特征、沉积模式,认为半深湖—深湖区规模发育辫状河三角洲供源型砂质碎屑流沉积,储层特征和质量与水下分流河道相当.研究结果表明:沉积相带受两级坡折控制分为辫状河三角洲内前缘、外前缘及(砂质)碎屑流带.砂质碎屑流粒度较粗,具有(大套)块状砂岩、突变接触、漂浮泥砾和泥质撕裂屑等主要识别标志,正、反旋回均有发育,平面上呈舌状或似朵状.储层平均孔隙度和渗透率分别为12.5%和5.51 mD,为中—低孔、中—低渗有效储层.储盖组合和侧向遮挡条件有利,烃源条件好,油气充注足,易形成规模岩性油气藏,勘探前景好.
        To confirm sedimentary characteristics, models and exploration prospects of reservoir sand bodies from half deep to deep in depression area of lacustrine petroliferous sedimentary basin, research achievements and understandings of sandy debris flow at home and abroad were systematically summarized. Sedimentary background, identification marks, sedimentary characteristics and model of reservoir sand bodies of the second member of Sangonghe formation in the western well Pen-1 sag of Junggar basin were studied based on core data, logging, well logs and 3 D seismic data. It is considered that braided river delta-fed sandy debris flow deposits are developed on a large scale from half deep to deep lake area, and the reservoir characteristics and quality are similar to those of subaqueous distributary channel. The results show that sedimentary facies controlled by two slope breaks are divided into braided river delta internal front, external front and(sandy) debris flow zone. The main identification marks of sandy debris flow with relatively coarse-grained size are(large set) massive sandstone, abrupt contact, floating mud gravel and mudstone clasts. Both positive and negative cycles of sandy debris flow are well developed, which are tongue shape or approximate lobe on the plane. The reservoirs are effective with medium-low porosity and permeability; the average porosity and permeability are 12.5% and 5.51 mD respectively. The sandy debris flow has good reservoir-caprock assemblage, lateral shielding condition, hydrocarbon source condition, and sufficient oil and gas charge. It is easy to form large-scale lithologic reservoir and has good exploration prospect.
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