天然气地球科学 ›› 2022, Vol. 33 ›› Issue (5): 693–707.doi: 10.11764/j.issn.1672-1926.2022.01.014

• 天然气地质学 • 上一篇    下一篇

准噶尔盆地玛湖地区二叠系风城组地震相特征及沉积相分布

王学勇1(),卞保力1,刘海磊1,蒋中发1,周路2,朱永才1   

  1. 1.中国石油新疆油田分公司,新疆 克拉玛依 834000
    2.西南石油大学地球科学与技术学院,四川 成都 610500
  • 收稿日期:2021-10-22 修回日期:2022-01-12 出版日期:2022-05-10 发布日期:2022-05-12
  • 作者简介:王学勇(1990-),男,河南兰考人,工程师,主要从事石油地质综合研究.E-mail:sxytwxy1@petrochina.com.cn.
  • 基金资助:
    国家科技重大专项“典型盆地深层油气输导格架建立与油气成藏分析”(2017ZX05008-004-008);中国石油天然气股份有限公司十四五重大前瞻性基础性重大科技项目“陆相深层超深层油气富集规律与勘探评价技术研究”(2021DJ0206)

Seismic facies characteristics and distribution of sedimentary facies of Permian Fengcheng Formation in Mahu area, Junggar Basin

Xueyong WANG1(),Baoli BIAN1,Hailei LIU1,Zhongfa JIANG1,Lu ZHOU2,Yongcai ZHU1   

  1. 1.PetroChina Xinjiang Oilfield Company,Karamay 834000,China
    2.School of Earth Science and Technology,Southwest Petroleum University,Chengdu 610500,China
  • Received:2021-10-22 Revised:2022-01-12 Online:2022-05-10 Published:2022-05-12
  • Supported by:
    The China National Science and Technology Major Project(2017ZX05008-004-008);the Major Science and Technology Project of CNPC(2021DJ0206)

摘要:

准噶尔盆地玛湖地区风城组发育扇三角洲—湖相沉积体系,多类型油气藏勘探区域与各沉积相带分布地区密切相关,而钻遇风城组的井比较有限,利用地震相分析技术预测各沉积相带分布就具有重要意义。对井下岩心、测井响应、单井沉积相与井旁地震反射特征开展了对比分析,建立了风城组不同沉积相类型与地震相之间的对应关系,基于分频重构与波形分类地震相边界识别方法,指出风城组主要地震相平面分布范围,并结合古地貌对风城组主要沉积相带的分布特征进行了预测。所提取的地震相平面分布规律性强,与井下沉积相及岩性符合程度高,能够反映玛湖地区风城组沉积相平面分布规律,扇三角洲平原—内前缘亚相砂砾岩主要分布在玛湖凹陷西、南与北缘斜坡上倾端,扇三角洲外前缘亚相云质砂岩类主要分布在下斜坡区,并连片分布,凹陷区为大范围滨浅湖—半深湖相泥岩、白云质岩类和泥质页岩分布区,这为玛湖地区风城组下一步多类型油气藏的勘探区域部署指明了方向。

关键词: 地震相, 沉积相, 分布预测, 玛湖地区, 风城组

Abstract:

Fan delta-lacustrine sedimentary system developed in Fengcheng Formation in Mahu area, Junggar Basin. The exploration area of multi-type oil and gas reservoirs is closely related to the distribution area of each sedimentary facies belt, and the wells drilled in Fengcheng Formation are relatively limited. It is of great significance to predict the distribution of each sedimentary facies belt by using seismic facies analysis technology. This paper conducts a comparative analysis of downhole core, logging response, single well sedimentary facies and seismic reflection characteristics beside the well, and establishes the correspondence between different sedimentary facies types and seismic facies of the Fengcheng Formation, seismic phase boundary recognition method based on frequency division reconstruction and waveform classification, pointed out the plane distribution range of the main seismic facies of the Fengcheng Formation, and predicted the distribution characteristics of the main sedimentary facies belt of the Fengcheng Formation based on the paleo-geomorphology. The extracted seismic facies have strong planar distribution regularity and high degree of conformity with the downhole sedimentary facies and lithology. It can reflect the planar distribution regularity of the Fengcheng Formation sedimentary facies in the Mahu area. The fan delta plain-inner front subfacies glutenite is mainly distributed in the western, southern and northern margins of the Mahu Sag, the subfacies dolomitic sandstones at the outer front of the fan delta are mainly distributed in the lower slope area, and are distributed in contiguous areas. The sag area is a wide range of shallow lake-semi-deep lacustrine mudstones, dolomitic rocks and argillaceous shale distribution areas, which point out the direction for the next step in the exploration area of multiple types of oil and gas reservoirs in the Fengcheng Formation in the Mahu area.

Key words: Seismic facies, Sedimentary facies, Distribution prediction, Mahu area, Fengcheng Formation

中图分类号: 

  • TE121.3+1

图1

玛湖地区地理位置"

图2

玛页1井二叠系风城组沉积相综合柱状图"

图3

过黄羊泉扇区百泉1井—百泉2井—百泉3井二叠系风城组沉积相剖面图"

图4

过八区扇区806井—检乌3井—白22井—玛湖26井—克207井二叠系风城组沉积相剖面图"

图5

过中拐扇区金龙49井—金龙35井—玛湖39井二叠系风城组沉积相剖面图"

图6

克81三维区块风二段分频与重构数据体地震相与沉积相对比"

图7

玛湖地区二叠系风城组地震相平面图(a)风一期;(b)风二期;(c)风三期"

图8

过黄羊泉扇区百泉1井—百泉2井—百泉3井风城组地震地质解释剖面图"

图9

过八区扇检乌3井—白22井—玛湖26井—克207井风城组地震地质解释剖面图"

图10

过中拐扇区金龙49井—金龙35井—玛湖39井风城组地震地质解释剖面图"

图11

玛湖地区二叠系风城组一段沉积古地貌(a)及沉积相平面图(b)"

图12

玛湖地区二叠系风城组二段沉积古地貌(a)及沉积相平面图(b)"

图13

玛湖地区二叠系风城组三段沉积古地貌(a)及沉积相平面图(b)"

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