石油勘探与开发 >

2021 , Vol. 48 >Issue 1: 12 - 25

DOI: https://doi.org/10.11698/PED.2021.01.02

油气勘探

渤海海域莱北低凸起新近系大面积高丰度岩性油藏形成条件

  • 徐长贵 ,
  • 杨海风 ,
  • 王德英 ,
  • 赵弟江 ,
  • 王利良
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  • 中海石油（中国）有限公司天津分公司,天津 300459
徐长贵（1971-）,男,江西乐平人,博士,中国海洋石油集团有限公司教授级高级工程师,主要从事石油地质与综合勘探研究。地址：天津市滨海新区海川路2121号,中海石油（中国）有限公司天津分公司,邮政编码：300459。E-mail：xuchg@cnooc.com.cn

收稿日期: 2020-04-26

  修回日期: 2021-01-05

  网络出版日期: 2021-01-19

基金资助

“十三五”国家科技重大专项“渤海海域勘探新领域及关键技术研究”（2016ZX05024-003）

收起

Formation conditions of Neogene large-scale high-abundance lithologic reservoir in the Laibei low uplift, Bohai Sea, East China

  • XU Changgui ,
  • YANG Haifeng ,
  • WANG Deying ,
  • ZHAO Dijiang ,
  • WANG Liliang
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  • Tianjin Branch of CNOOC Ltd, Tianjin 300459, China

Received date: 2020-04-26

  Revised date: 2021-01-05

  Online published: 2021-01-19

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摘要

利用钻井、高精度三维地震、测井及地球化学、测试等各种资料对渤海海域莱北低凸起垦利6-1油田的油藏特征与成藏条件进行综合研究。研究表明,垦利6-1油田具有油藏埋深较浅、测试产能高、含油层段集中、含油面积大、储量丰度较高的特点,是一个整装、优质的新近系大型岩性油田;双向烃源供给为大型油田的形成提供了充足的物质基础;块体旋转效应下发育的两种类型“继承性构造脊”、新构造运动形成的晚期活动断层、广布的连片砂体为油气的规模性汇聚提供了高效的油气输导体系;低可容空间条件下发育的河湖相交互叠合连片低位砂体为大型岩性圈闭的形成提供了基本条件;“深层油气构造脊-断层优势运移通道-大型叠合连片砂体”构成了莱北低凸起“藤蔓式”油气运聚模式,有利于该地区大面积高丰度岩性油藏大规模成藏。垦利6-1亿吨级岩性油田勘探发现揭示了渤海海域新近系大型岩性油气藏的勘探潜力,拓展了勘探领域,同时也对类似地区大面积岩性油气藏勘探具有一定的借鉴意义。图15表1参36

关键词： 低位砂体; 双向烃源; 大面积; 岩性油藏; 形成机制; 新近系; 渤海湾盆地; 渤海海域

本文引用格式

徐长贵 , 杨海风 , 王德英 , 赵弟江 , 王利良 . 渤海海域莱北低凸起新近系大面积高丰度岩性油藏形成条件[J]. 石油勘探与开发, 2021 , 48(1) : 12 -25 . DOI: 10.11698/PED.2021.01.02

Abstract

By using drilling, high-precision 3D seismic data, data of geochemistry, logging and testing, the reservoir characteristics and accumulation conditions of the KL6-1 lithologic oilfield in the Laibei low uplift in the Bohai Sea are examined comprehensively. The study shows that: KL6-1 oilfield is a monolithic, high-quality, large-scale Neogene lithologic oilfield featuring shallow reservoir depth, high productivity, concentrated oil-bearing intervals, large oil-bearing area, and high reserve abundance; hydrocarbon source supply from two directions provides a sufficient material basis for the formation of large oil field; two types of “inherited structural ridge” developed under the effect of block rotation, late active faults formed by Neotectonic movement, and widely distributed contiguous sand bodies provide an efficient oil and gas transportation system for the large-scale accumulation of oil and gas; contiguous channel and lacustrine lowstand sand bodies developed in low accommodation condition provide the basic condition for the formation of large scale lithologic traps; deep formations structural ridge, faults (dominant migration pathways) and large scale superimposed contiguous sand bodies constitute a “vine type ”oil and gas migration and accumulation system in the Laibei low uplift, which is conducive to the formation of large scale and high abundance lithologic reservoir in this area. The successful discovery of KL6-1 100 million ton reserve order lithologic oil field has revealed the exploration potential of Neogene large lithologic reservoirs in Bohai Sea, expanded the exploration field, and also has certain reference significance for the exploration of large lithologic reservoirs in similar areas.

Key words： low stand system sand bodies; bidirectional hydrocarbon source; large-scale; lithologic oil reservoir; formation mechanism; Neogene; Bohai Bay Basin; Bohai Sea area

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