缝洞型油藏储集体分类建模方法研究

Study on the Classification and Modeling of Fracture-Vug Oil Deposits

吕心瑞 韩东 李红凯

LÜ Xinrui HAN Dong LI Hongkai

中国石化石油勘探开发研究院, 北京 海淀 100083

Petroleum Exploration and Production Research Institute, SINOPEC, Haidian, Beijing 100083, China

为了表征缝洞型碳酸盐岩油藏储集体类型多样、尺度差异大、空间分布规律复杂的特征，采用"分级分类、岩溶相控、多类型融合"的方法，分别对不同类型缝洞储集体的规模大小、外部几何形态及内部属性特征进行建模，建立了基于岩溶成因的融合原则，实现了不同类型缝洞储集体的融合，并通过新钻井验证了模型可靠性。结果表明，该方法适用于此类强非均质性油藏的地质建模，能够有效表征不同类型储集体及属性参数的空间分布特征。基于模型，细化了XX单元的储量构成，其中，溶洞储量占63.1%，溶蚀孔洞储量占34.5%，大尺度裂缝储量占2.4%。该模型在油藏数值模拟中取得了较好的拟合效果和模拟结果。

To characterize the various types, scale differences, and spatial distribution features of fracture-vug carbonate reservoir systems, we used the "classifying, categorizing, karst-facies control, multi-type integration" method and modeled the respective scales, external morphology, and internal attributes of various types of fracture-vug reservoir systems. Based on the karst origin integration principle, we integrated various types of fracture-vug reservoir systems and verified the model reliability through well drilling. The results show that this method is suitable for the geological modeling of such highly heterogenous reservoirs and can effectively characterize various reservoir systems and the spatial distribution of their parameters. Based on the model, the reserve composition of unit XX was refined; the karst cave reserves made up 63.1%, the dissolved pore reserves accounted for 34.5%, and large-scale fracture reserves accounted for 2.4% of the unit. The model simulation of oil deposit numerical values obtained better fit and simulation results.

10.11885/j.issn.1674-5086.2016.07.21.03