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海拉尔盆地苏仁诺尔油田浊积岩沉积特征 预览

Turbidite Sedimentary Characteristics of Surennuoer Oilfield in Hailaer Basin
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摘要 通过对海拉尔盆地苏仁诺尔油田南二段油层岩性组合、粒度分析、重矿物组合特征及断裂活动等方面的研究,对南二段的浊积岩沉积特征及其形成机理进行了分析,结果表明:研究区南二段油层浊积岩主要来源于凹陷东西两侧的扇三角洲前缘砂体,以西侧物源为主;岩性组合以含砾细砂岩、细砂岩和粉砂岩为主,多呈正韵律,夹于深灰色湖相泥岩中,与泥岩呈突变接触,常见鲍玛序列的B段,底部常见冲刷面;粒度概率曲线和C–M图均具有典型浊流沉积特征;南二期,控陷断层活动强烈,地震活动为主要诱发产生滑塌的外界机制,处于同沉积断层活动区域的扇三角洲前缘砂体容易向下降盘一侧深水区域发生二次搬运,形成一系列与断层走向相垂直的滑塌浊积岩砂体。研究结果为海拉尔盆地进一步的勘探评价提供了一定的理论指导作用。 Through the study of the lithologyicombination,grain size analysis,heavy minerals assemblageicharicteristics and the faults ictivities of Nantun II formation in Surennuoer Oilfield,the sedimentaryicharicteristics and generation michanism of the turbidite are analyzed. The results indicate that the Nantun II formation turbidite from Surennuoer Oilfield is mainly souiced by the pro-delta sand bodies on both the west and east side of the depression,with the western provenaice as the primary one. The lithology isicomposed of dark grey middle to fine grain size sandstone and siltstone,with positive rhythm,usually embedded within the dark grey licustrine shale. Theicontict between the shale and the sand bodies is quite sharp,and the B siction of the Bauma sequeice isicommonly seen,and the icour surfice is seen at the bottom. Theic – Michart and the statisticsicurve of grain sizes areicharicterized by typical turbidite. When the Nantun II formation was deposited,the faults,whichicontrol the depression,were quite ictive and the resulting seismic ictivitiesicould be the external michanism for the slump. For syn-depositional pro-delta sand bodies licated within the faults ictive areas are prone to the sicondary migration,resulting a series of slump turbidite sand bodies which are perpendicular to the strike of the faults. The results provides some guidaice for the further exploration and evaluation in Hailaer Basin.
作者 苏向光 Su Xiangguang( Exploration and Development Research Institute, Daqing Oilfield Company Ltd., PetroChina, Daqing, Heilongjiang 163712, China)
出处 《西南石油大学学报》 CAS CSCD 北大核心 2015年第2期82-86,共5页 Journal of Southwest Petroleum Institute
基金 中国石油天然气股份有限公司重大科技专项“大庆油田原油4 000万吨持续稳产关键技术研究”(2008E–12)
关键词 苏仁诺尔油田 南二段油层 浊积岩 沉积特征 形成机理 Surenuoer Oilfield Nantun II Formation turbidite sedimentary characteristics generation mechanism
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