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泌阳凹陷下二门地区核桃园组油气成藏再认识

罗家群 张永华 谢春安 张磊

罗家群, 张永华, 谢春安, 张磊. 泌阳凹陷下二门地区核桃园组油气成藏再认识[J]. 地质科技通报, 2022, 41(3): 1-8. doi: 10.19509/j.cnki.dzkq.2022.0072
引用本文: 罗家群, 张永华, 谢春安, 张磊. 泌阳凹陷下二门地区核桃园组油气成藏再认识[J]. 地质科技通报, 2022, 41(3): 1-8. doi: 10.19509/j.cnki.dzkq.2022.0072
Luo Jiaqun, Zhang Yonghua, Xie Chun′an, Zhang Lei. Re-understanding on hydrocarbon accumulation of the Hetaoyuan Formation in Xiaermen area of the Biyang Depression[J]. Bulletin of Geological Science and Technology, 2022, 41(3): 1-8. doi: 10.19509/j.cnki.dzkq.2022.0072
Citation: Luo Jiaqun, Zhang Yonghua, Xie Chun′an, Zhang Lei. Re-understanding on hydrocarbon accumulation of the Hetaoyuan Formation in Xiaermen area of the Biyang Depression[J]. Bulletin of Geological Science and Technology, 2022, 41(3): 1-8. doi: 10.19509/j.cnki.dzkq.2022.0072

泌阳凹陷下二门地区核桃园组油气成藏再认识

doi: 10.19509/j.cnki.dzkq.2022.0072
基金项目: 

中石化科技攻关项目“泌阳凹陷油气聚集规律与精细评价关键技术” ZDP17012

详细信息
    作者简介:

    罗家群(1962—),男,教授级高级工程师,主要从事油气勘探部署及油藏评价工作。E-mail: luojq5186@126.com

  • 中图分类号: TE122

Re-understanding on hydrocarbon accumulation of the Hetaoyuan Formation in Xiaermen area of the Biyang Depression

  • 摘要:

    泌阳凹陷下二门地区位于泌阳凹陷东部,区内已发现下二门油田。该油田在核三上段至核二段下部为纯油藏,核二段上部为具气顶的油藏,核一段和廖庄组为纯气藏。经过40多年勘探开发,在下二门地区油气藏的发现难度越来越大,油气勘探陷入瓶颈期。为了进一步扩大该区勘探规模,取得新的油气发现,需要对该地区油气成藏机制再认识进而决定其下一步勘探方向。利用最新勘探和油藏资料,通过烃源条件分析、油源对比、天然气成分分析及油藏精细解剖,重新认识了该地区油气成藏机制。研究结果表明:泌阳凹陷深凹区的核二段泥页岩发育广,生烃指标较好,已进入低成熟阶段,具备较好的生油条件;下二门地区各层系油气与深凹区的源岩关系明确,表明油气以顺层运移为主,即核二段低熟油应该来自深凹区核二段低熟烃源岩,核三上段和核三下段原油分别来自深凹区核三上段和核三下段的成熟烃源岩;下二门地区核二段产出的天然气为低成熟伴生气,明显不同于深层凝析气,并非深层油气沿断层调整而来;下二门地区深层油气资源量大,但目前已发现储量规模有限,这预示着该区仍有较大的勘探潜力。因此,总结下二门地区的油气成藏特点及成藏模式,不仅可为该区油气勘探提供指导,而且可为我国东部类似断陷湖盆含油构造的进一步勘探提供借鉴。

     

  • 图 1  泌阳凹陷地层发育序列及下二门地区构造位置图

    Figure 1.  Map of Xiaermen in Biyang Depression

    图 2  深凹区泌270井与下二门地区泌296井不同层段有机碳质量分数对比图

    Eh2 Ⅰ~Ⅳ.核桃园组Ⅰ~Ⅳ油组

    Figure 2.  Organic carbon layered histogram of deep sag area-Xiaermen in Biyang Depression

    图 3  深凹区泌270井与下二门地区泌296井不同层段热释烃含量(S1)、生烃替量(S1+S2)对比图

    Figure 3.  Stratified histogram of pyrogenic hydrocarbons(S1), hydrocarbon generation replacement(S1+S2) of deep sag area-Xiaermen in Biyang Depression

    图 4  下二门地区核二段主要产层原油的甾萜烷分布

    Figure 4.  Sterane and terpane distribution of the main oil producing formation of second stage of walnut garden group in Xiaermen Oilfield

    图 5  双河地区、梨树凹地区核二段原油甾萜烷分布

    Figure 5.  Sterane and terpane distribution source rock of second stage of walnut garden group in Xiaermen oilfield and Shuanghe Oilfield

    图 6  下二门地区核三Ⅱ~Ⅴ油组原油的甾萜烷分布

    Figure 6.  Sterane and terpane distribution of the crude oil producing formation of the Ⅱ-Ⅴ sand group in the third stage of walnut garden group in Xiaermen Oilfield

    图 7  各层段原油的Ts/(Ts+Tm)与伽马蜡烷/C31藿烷关系图

    Figure 7.  Ts(Ts+Tm), gammacerane/C31 hopane diagram of crude oil in each layer

    图 8  孙岗地区H34小层沉积微相图

    Figure 8.  H34 small layer of sedimentary microfacies map in Sungang area

    图 9  泌阳凹陷下二门地区新(a)、老(b)油气成藏模式图

    Figure 9.  New(a) and old(b) oil and gas accumulation pattern diagrams in the Xiaermen area of Biyang Depression

    图 10  泌阳凹陷下二门地区气藏形成模式图

    Figure 10.  Pattern of gas reservoir formation in the Xiaermen area of Biyang depression

    表  1  下二门地区浅层天然气甲烷碳同位素及成熟度表

    Table  1.   Carbon isotopes and maturity tables of natural gas methane in the lower Xiaermen area

    井号 井深/m 层系 样品类型 CH4 δ13CPDB/‰ Ro/% (戴金星公式) Ro/% (Stahl公式)
    T2-平11 770 H13 天然气 -47.1 0.478 6 0.387
    下6-11 960 H22-5 -49.6 0.329 0 0.260
    下5-152 960 H23 -45.1 0.646 5 0.528
    下5-610 1 100 H21-3-9 -44.3 0.729 0 0.598
    下载: 导出CSV
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  • 收稿日期:  2021-06-12

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