裂缝表征及建模在迪那2气田的应用

迪那 2 气田为超高压低孔裂缝性砂岩凝析气藏。气田范围内，裂缝较为发育且非均质性较强，同时，储层裂缝发育程度与单井产能密切相关，因而，对该气田裂缝参数的定量表征及建模将显得尤为重要。本次研究，综合迪那 2 地区丰富的岩心、测井、录井及测试资料，对各项主要裂缝参数进行定量表征，并在此基础上分析了控制迪那 2 气田裂缝发育的构造及地质因素；采用多属性体权重约束方法，建立了迪那 2 气田裂缝强度预测三维模型，实现了断层共生缝、构造成因缝、地质成因缝间的有效耦合，为裂缝属性参数的建立提供了可靠的约束趋势体；同时，利用动态参数优化等效参数模型，大大提高了裂缝属性参数模拟的精度，形成了一套针对裂缝性油气藏由裂缝表征到建模的有效技术方法。

Dina 2 Gas Field belongs to a fractured sandstone condensate gas reservoir with low porosity and high pressure. In this area, the fractures develop and heterogeneity is strong. The degree of reservoir fracture development is closely related to the individual well productivity. As a result, the fracture characterization and modeling become particularly important. This paper quantitatively characterizes the fracture parameters based on the rich data from core tests, imaging logging, borehole log and production performance. Then, the major control factors on fracture development are analyzed and the 3D fracture intensity models are established with the method of constraining multi-attribute weight. Finally, a reliable fracture development restricted tendency cube is constructed by coupling variables which fault with fractures and tectonic origin fractures and geologic origin fractures. The dynamic parameters are used to optimize the equivalent parameter model, which greatly improves the accuracy of fracture parameter simulation, forming a set of effective technical methods from fracture characterization to modeling for fractured gas reservoirs.

10.6056/dkyqt201501017