本文關(guān)鍵詞： 渤海灣盆地 廊固凹陷 大興斷裂帶 沙河街組 近岸水下扇 沉積微相　出處：《新疆石油地質(zhì)》2017年02期 　論文類型：期刊論文

【摘要】：廊固凹陷大興斷裂帶相繼發(fā)現(xiàn)興8、興9等礫巖油氣藏,油氣資源豐富,且多數(shù)油氣藏處于近岸水下扇扇中辮狀水道微相,因此對(duì)大興斷裂帶近岸水下扇的沉積特征進(jìn)行研究顯得尤為重要。綜合前人研究成果和廊固凹陷最近獲取的巖心、地震、測井等資料,對(duì)近岸水下扇進(jìn)行了沉積微相特征的識(shí)別及沉積微相類型的劃分,總結(jié)了近岸水下扇分布特征,并分別建立了碎屑流及泥石流近岸水下扇沉積模式。碎屑流近岸水下扇在舊州地區(qū)發(fā)育,扇體表現(xiàn)為厚層礫巖與泥巖的突變接觸,沉積物主要是顆粒支撐礫巖,雜基含量很少;而泥石流近岸水下扇在固安地區(qū)發(fā)育,扇體幾乎無水道發(fā)育,沉積物主要為雜基支撐礫巖,雜基主要為泥質(zhì)。碎屑流近岸水下扇識(shí)別出扇根主水道、扇根水道間、扇中辮狀水道、扇中辮狀水道間、扇端席狀砂和扇端泥6種沉積微相,其中扇中辮狀水道微相是扇中甚至整個(gè)碎屑流近岸水下扇的主體,扇端亞相相對(duì)不發(fā)育。近岸水下扇整體上沿大興斷層呈近北東—南西向展布,在沙三下亞段最為發(fā)育。
[Abstract]:In the Daxing fault zone of Langgu depression, conglomerate reservoirs such as Xing 8 and Xing 9 have been discovered one after another, with abundant oil and gas resources, and most oil and gas reservoirs are located in the microfacies of braided channel in the subaqueous fan of the near shore. Therefore, it is very important to study the sedimentary characteristics of the subaqueous fan near the Daxing fault zone. Based on the previous research results and the core, seismic and logging data obtained recently from the Langgu depression, it is very important to study the sedimentary characteristics of the subaqueous fan near the Daxing fault zone. The characteristics of sedimentary microfacies and the types of sedimentary microfacies of near-shore underwater fan are identified, and the distribution characteristics of near-shore underwater fan are summarized. The detrital flow and debris flow near-shore underwater fan deposition model are established respectively. The clastic flow nearshore underwater fan develops in the Jiaozhou area. The fan body is characterized by sudden contact between thick layer conglomerate and mudstone. The sediment is mainly granular supporting conglomerate with little complex base content. While the underwater fan of debris flow near shore developed in Guan area, the fan body almost did not have waterway, the sediment was mainly supported conglomerate by complex foundation, and the sediment was mainly muddy. The main fan root channel and between the fan root channel were identified by the debris flow near shore underwater fan. The braided channel in the fan, between the braided channel in the fan, the sheet sand at the end of the fan and the mud at the end of the fan are six kinds of sedimentary microfacies, in which the microfacies of the braided channel in the fan is the main body of the underwater fan with the whole debris flow near the shore. The subfacies of the subfacies of the fan are relatively undeveloped. The near-shore underwater fan is distributed along the Daxing fault in the NNE-NW direction, and is the most developed in the lower part of Sha 3.
【作者單位】： 中國石油大學(xué)地球科學(xué)學(xué)院油氣資源與探測國家重點(diǎn)實(shí)驗(yàn)室;中國石油華北油田分公司;
【基金】：中國石油科技重大專項(xiàng)(2014E-3504)
【分類號(hào)】：P618.13

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