天然气地球科学 ›› 2022, Vol. 33 ›› Issue (7): 1155–1164.doi: 10.11764/j.issn.1672-1926.2022.01.010

• 天然气勘探 • 上一篇    下一篇

四川盆地仪陇地区飞仙关组鲕粒滩地震预测

谭万仓1,2,3(),杨飞1(),赵亮3,熊冉4   

  1. 1.长江大学油气资源与勘探技术教育部重点实验室,湖北 武汉 430100
    2.东北石油大学地球科学学院,黑龙江 大庆 163318
    3.中国石油大庆油田有限责任公司勘探开发研究院,黑龙江 大庆 163712
    4.中国石油杭州地质研究院,浙江 杭州 310023
  • 收稿日期:2021-05-23 修回日期:2022-01-12 出版日期:2022-07-10 发布日期:2022-07-11
  • 通讯作者: 杨飞 E-mail:tanwancang@petrochina.com.cn;randyang@126.com
  • 作者简介:谭万仓(1982-),男,重庆人,高级工程师,主要从事油气勘探部署及综合地质研究.E-mail:tanwancang@petrochina.com.cn.
  • 基金资助:
    国家科技重大专项专题“川西源内成藏体系成藏机理研究”(2016ZX05002004-009)

Seismic prediction of oolitic beach of Feixianguan Formation in Yilong area, Sichuan Basin

Wancang TAN1,2,3(),Fei YANG1(),Liang ZHAO3,Ran XIONG4   

  1. 1.The Key Laboratory of Oil and Gas Resources and Exploration Technology of Ministry of Education,Yangtze University,Wuhan 430100,China
    2.College of Earth Science,Northeast Petroleum University,Daqing 163318,China
    3.The Exploration & Development Institute of Daqing Oilfield Company Ltd. ,Daqing 163712,China
    4.Hangzhou Institute of Geology,PetroChina,Hangzhou 310023,China
  • Received:2021-05-23 Revised:2022-01-12 Online:2022-07-10 Published:2022-07-11
  • Contact: Fei YANG E-mail:tanwancang@petrochina.com.cn;randyang@126.com
  • Supported by:
    The China Science and Technology Major Project(2016ZX05002-004-009)

摘要:

四川盆地仪陇地区飞仙关组鲕粒滩型储层埋藏深度较大,沉积地质背景较为复杂,钻至深层的探井较少,难以准确预测鮞粒滩型储层的空间分布,制约了飞仙关组的油气勘探。飞仙关组储层主要为该组的一段、二段鲕粒滩,岩性以亮晶鲕粒灰岩和残余鲕粒灰岩为主,大多分布于台缘带上。地震正演模拟结果显示,鲕粒滩在地震剖面上外形呈现为透镜状,具有较强振幅和较低频率。采用地震沉积学研究方法,在鲕粒滩发育的台缘带上,利用地震振幅属性有效地预测仪陇—平昌地区飞仙关组鲕粒滩储层的空间展布。鲕粒滩型储层的识别及其分布特征与实际钻探结果匹配度较高,证明通过地震属性分析对鲕粒滩型储层的识别及分布进行预测是切实可行的,为下步对该类储层进行勘探打下了良好的基础。沉积相分析、地震正演模拟与地震属性分析有机结合能有效进行深层鲕粒滩储层识别与勘探。

关键词: 飞仙关组, 鲕粒滩, 正演模拟, 地震属性, 地震岩性预测

Abstract:

The oolitic shoal reservoir of Feixianguan Formation has a large burial depth, and complicated sedimentary geological background in Yilong area. It is difficult to accurately predict the spatial distribution of oolitic shoal reservoir because there are few deep exploration wells, which restricts the oil and gas exploration of Feixianguan Formation. The Feixianguan Formation reservoir is mainly composed of the first and second sections of oolitic shoals, which are mostly distributed on the platform margin. The lithology is mainly composed of bright crystal oolitic limestone and residual oolitic limestone. According to the results of forward seismic modeling, the oolitic shoal is lenticular in shape, with strong amplitude & low frequency. The spatial distribution of oolitic shoal reservoir of Feixianguan Formation in Yilong Pingchang area can be effectively predicted by using seismic sedimentology and seismic amplitude attributes. The identification and distribution characteristics of oolitic beach reservoirs match well with the actual drilling results, which proves that it is feasible to predict the identification and distribution of oolitic beach reservoirs through seismic attribute analysis, and lays a good foundation for further exploration of this kind of reservoirs. The organic combination of sedimentary facies analysis, seismic forward modeling and seismic attribute analysis can effectively identify and explore deep oolitic beach reservoirs.

Key words: Feixianguan Formation, Oolitic beach, Forward modeling, Seismic attribute, Seismic lithology prediction

中图分类号: 

  • TE122.1+13

图1

仪陇—平昌地区构造位置图及飞仙关组沉积时期沉积相图"

图2

水深1井地层沉积综合柱状图"

图3

飞仙关组鲕粒灰岩典型岩石特征(a)泥晶—亮晶砂屑灰岩,6 139.11 m; (b)残余鲕粒灰岩,6 390.20 m; (c)亮晶鲕粒灰岩,6 642.20 m; (d)残余鲕粒灰岩,6 527.25 m; (e)泥晶鲕粒白云岩,5 933.50 m; (f)泥晶鲕粒白云岩,杨家1井,飞二段,5 933 m,显微照片"

图4

飞二段储层孔隙度与渗透率散点图"

图5

LG23井地震层位标定"

图6

沉积微相与地震属性对应关系"

图7

鲕粒滩典型地震剖面图(图中黑色虚线框内)(a)水深1井区鲕粒滩剖面;(b)LG23井区鲕粒滩剖面"

图8

飞仙关组二段鲕粒滩正演模拟效果图"

图9

龙岗20井—龙岗23井—水深1井龙潭组—飞仙关组连井沉积相对比"

图10

仪陇地区飞仙关组二段鲕粒滩储层均方根振幅属性(a)及平面展布图(b)"

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