Acta Petrolei Sinica ›› 2023, Vol. 44 ›› Issue (9): 1459-1471.DOI: 10.7623/syxb202309005

• WHOLE PETROLEUM SYSTEM COLUMN • Previous Articles     Next Articles

Modeling and resource distribution prediction of the Lower Paleozoic petroleum system in platform area of Tarim Basin

Guo Qiulin1, Huang Shaoying2, Lu Yuhong2, Wang Jian1, Wu Xiaozhi1, Chen Ningsheng1   

  1. 1. PetroChina Research Institution of Petroleum Exploration and Development, Beijing 100083, China;
    2. PetroChina Tarim Oilfield Company, Xinjiang Korla 841000, China
  • Received:2023-06-02 Revised:2023-08-08 Online:2023-09-25 Published:2023-10-09

塔里木盆地台盆区下古生界油气系统模拟及资源分布预测

郭秋麟1, 黄少英2, 卢玉红2, 王建1, 吴晓智1, 陈宁生1   

  1. 1. 中国石油勘探开发研究院 北京 100083;
    2. 中国石油塔里木油田公司 新疆库尔勒 841000
  • 通讯作者: 郭秋麟,男,1963年10月生,2008年获中国科学院地质与地球物理研究所矿物学、岩石学与矿床学专业博士学位,现为中国石油勘探开发研究院教授级高级工程师,主要从事盆地模拟与油气资源评价研究。Email:qlguo@petrochina.com.cn
  • 作者简介:郭秋麟,男,1963年10月生,2008年获中国科学院地质与地球物理研究所矿物学、岩石学与矿床学专业博士学位,现为中国石油勘探开发研究院教授级高级工程师,主要从事盆地模拟与油气资源评价研究。Email:qlguo@petrochina.com.cn
  • 基金资助:
    中国石油天然气股份有限公司科学研究与技术开发项目"剩余油气资源空间分布技术研究"(2021DJ07)资助。

Abstract: The great discovery of deep fault solution reservoirs in platform area of Tarim Basin reveals huge resource potential of the Lower Paleozoic petroleum system, which is a key field for the further petroleum exploration. Through analyzing the characteristics of petroleum system in both the Lower Paleozoic Yuertus Formation and the Ordovician reservoir, the paper establishes the sectional models of 104 fault transport systems, which integrate multisource data of the fault dissolution zone, seismic attributes, sedimentary facies, and oil-gas reservoirs, finally obtaining the quantitative evaluation values of Ordovician reservoirs; moreover, using the 3D intrusion percolation technology based on transportation system constraints, a 3D geological model of Yuertus Formation and Ordovician petroleum system has been established to simulate the hydrocarbon migration and accumulation from Yuertus Formation to the Ordovician reservoir, so as to predict the distribution of Ordovician oil and gas resources. Modeling and prediction results reveal that: (1) in the known areas, the coincidence rate of simulated hydrocarbon accumulation area and reserve area is over 80 %, thus verifying the high reliability of simulation results; (2) in the unknown areas, the predicted oil and gas accumulation area accounts for around 50 % of the known reserve area, which reveals great resource potential; (3) in the predicting areas, the average hydrocarbon saturation is lower than that in the reserve areas, and the accumulation areas are scatteredly distributed and there are few contiguous accumulation areas, indicating poor resource economy; (4) the favorable resource distribution area include the fault-karst reservoirs near Well Shunnan 3 and Well Shunbei 4, northeast of Well Manshen 8, and northwest of Well Gulong 2, as well as karst zones in the southwest of Tazhong uplift and northwest of Tabei uplift. The research results can provide references for understanding of the accumulation mechanism of Ordovician oil-gas reservoirs and target optimization.

Key words: petroleumsystem modeling, resource distribution prediction, reservoir condition evaluation, fault-karst body, Ordovician, Yuertusi Formation, Tarim Basin

摘要: 塔里木盆地台盆区深层断溶体油气藏的重大发现揭示了下古生界油气系统资源潜力巨大,是下一步油气勘探的重点领域。通过分析下古生界玉尔吐斯组—奥陶系油气系统的特征,构建了104条断裂输导体系的断面模型,融合了断溶带、地震属性、沉积相和油气藏的多源数据并形成奥陶系储层定量评价值,建立了玉尔吐斯组—奥陶系油气系统三维地质模型,采用基于输导体系约束的三维侵入逾渗技术模拟了油气从玉尔吐斯组到奥陶系的运移与聚集,从而预测了奥陶系油气资源分布。模拟和预测结果揭示:①在已知区,模拟的油气聚集区与储量区分布面积符合率高于80 %,证实模拟结果可信度较高;②在未发现区,预测的油气聚集区约为已发现储量区面积的50 %,揭示 还有较大资源潜力;③在预测区,平均含油气饱和度比储量区低,且聚集区分布面积较零散,连片聚集区相对较少,说明资源经济性相对较差;④资源分布有利区包括顺南3井和顺北4井附近、满深8井东北侧、古隆2井西北侧等地区的断溶体和塔中凸起西南侧、塔北隆起西北侧的岩溶带。研究成果可以为奥陶系油气成藏机制的认识和目标优选提供参考。

关键词: 油气系统模拟, 资源分布预测, 储层条件评价, 断溶体, 奥陶系, 玉尔吐斯组, 塔里木盆地

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