| 文鑫,戴建文,王华,陈晨,万琼华.珠江口盆地恩平凹陷辫状河三角洲前缘单砂体构型精细表征研究[J].矿产勘查,2024,15(10):1781-1789 |
| 珠江口盆地恩平凹陷辫状河三角洲前缘单砂体构型精细表征研究 |
| Characterization of single-sand architecture of braided river delta front of enping depression in Pearl River Mouth Basin |
| 投稿时间：2023-11-10 修订日期：2023-12-28 |
| DOI：10.20008/j.kckc.202410002 |
| 中文关键词: 恩平凹陷 三角洲前缘 单砂体构型 构型建模 剩余油 |
| 英文关键词: Enping depression delta front single-sand architecture architecture model residual oil |
| 基金项目:本文受中海石油（中国）有限公司综合科研项目（YXKY-2019-KFSC-01）资助。 |
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| 中文摘要: |
| 辫状河三角洲前缘储层是珠江口盆地油田开发的主要对象，随着开发程度加深，单砂体成为影响剩余油分布的重要控制单元。为了深入研究海上油田辫状河三角洲前缘储层内部单砂体构型模式及剩余油分布，以珠江口盆地恩平凹陷A油田珠江组辫状河三角洲储层为例，利用沉积动力学、储层反演和隔夹层精细刻画等多种手段开展了单砂体级及单砂体内部级次构型表征研究。研究结果表明：研究区发育8种单砂体垂向叠置样式和3种平面叠置样式，通过沉积微相和隔层空间展布的精细刻画实现了单砂体级构型边界的识别。研究区发育河控顺源河道伴生、河控顺源分流砂坝和浪控垂源沿岸砂坝3种单砂体构型模式，河控顺源河道伴生构型模式上部夹层近水平的特征，夹层宽度大，连续性好，垂向上夹层密度大；河控顺源分流和浪控垂源砂坝构型模式中夹层特征为下部夹层多，上部夹层少，在岩性上表现为上粗下细。单砂体构型地质模型能精细刻画单砂体结构，提高了油藏数模预测剩余油准确性，在油田剩余油挖潜中取得良好应用效果。 |
| 英文摘要: |
| The braided river delta front reservoir is the main development object of the oilfield in the Pearl River Mouth Basin. Limited by the lack of basic data of offshore oilfields， the reservoir architecture research of the Pearl River Mouth Basin reaches the level of compound sand body by now， With the increase of development， single sand body becomes an important control of remaining oil distribution， and further research is necessary. For this reason， taking the braided river delta reservior of A oilfield of Enping Depression in Pearl River Mouth Basin as an example， the characterization of single sand body grade and the internal single sand body grade architecture was carried out.The study shows that， there are 8 vertical superimposed styles and 3 planar superimposed styles of single sand bodies developed in the research area， the identification of single sand body level architecture boundaries was achieved through the fine characterization of sedimentary microfacies and interlayer spatial distribution.There are three types of single body architecture models： river controlled paralleled-provenance channel association， river controlled paralleled-provenance diversion bar and wave controlled vertical-provenance coastal bar. The upper interlayer of river controlled paralleled-provenance channel association is nearly horizontal， with large width， good continuity and high vertical density. In the reservoir architecture mode of the river controlled paralleled-provenance diversion bar and wave controlled vertical-provenance coastal bar， the interlayer features are more in the lower part and less in the upper part， which is coarse above and fine below lithology. The architecture model of single sand body level can accurately depict the structure， improve the accuracy of predicting remaining oil by reservior numerical simulation and achieved good application results in tapping the potential of remaining oil in oilfields. |
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