不整合面下缝洞岩体油气运聚模型——以塔里木盆地碳酸盐岩油藏为例

Hydrocarbon migration and accumulation model of fractured-vuggy reservoir under unconformity surface: A case study of carbonate reservoir in Tarim Basin

郭秋麟 杨文静 肖中尧 卢玉红 谢红兵 高日丽 黄少英

Guo Qiulin Yang Wenjing Xiao Zhongyao Lu Yuhong Xie Hongbing Gao Rili Huang Shaoying

中国石油勘探开发研究院,北京 100083 中国石油 塔里木油田分公司 勘探开发研究院,新疆 库尔勒 841000 中国石油大学(北京) 地球科学学院,北京 102249

(1. Research Institute of Petroleum Exploration and Development, PetroChina, Beijing 100083, China Research Institute of Petroleum Exploration and Development, Tarim Oilfield Company, PetroChina,

使用传统的容积法难以准确计算不整合面下碳酸盐岩缝洞岩体内油气的资源量或储量。该文从油气成藏数值模拟的角度，提出三维侵入逾渗模型（3D-IP）尝试解决这一难题。模型核心思路是通过三维地质建模，根据构造、孔隙度和油气源供给量模拟油气的运聚。模型有3个要点：（1）沿最小阻力方向追踪油气运聚路径；（2）遇到障碍时油气沿初始路径回注；（3）动阻力平衡系统被破坏时油气改变路径，寻找最薄弱节点继续运移。模型可以弥补容积法的不足，并能在预测资源规模的同时，指出资源的分布位置。通过随机模拟实验和塔中S6区块的实际应用，证实了模型的有效性和优越性。根据S6区块模拟结果的分析，预测了该区缝洞型油气藏的勘探方向。

It is difficult to accurately evaluate petroleum resources or reserves in the fractured-vuggy carbonate rocks under unconformity surface using traditional volumetric method. This paper proposes a three-dimensional invasion percolation model (3D-IP) to simulate hydrocarbon migration and accumulation in fractured-vuggy carbonate rocks, based on three-dimensional geologic modeling, structure, porosity and the quantity of supplied hydrocarbon data. The model has 3 main points: (1) Trace migration paths along the direction with least resistance; (2) When an obstacle is encountered, oil and gas flow back; (3) When the balance between driving force and resistance is broken, oil and gas continue to migrate by finding the weakest points and paths. The model can make up for the inadequacy of the volumetric method. It can predict not only the amount of petroleum resources, but also their locations. By stochastic model experiment and practical application of Block S6 in Tazhong area of the Tarim Basin, this paper confirms the validity and superiority of the proposed model, and points out potential targets in Block S6, thus giving exploration direction of fractured-vuggy reservoir in the slope area.

国家重大科技专项“岩性地层区带、圈闭评价与储层预测技术研究”（2011ZX05001）和中国石油科技攻关项目“盆地模拟技术研究”（2008A-0602）资助。

https://doi.org/10.11781/sysydz201305495