束鹿凹陷泥灰岩致密油气藏储层预测技术研究与应用

束鹿凹陷泥灰岩致密油气藏剩余资源丰富,是华北油田重要的勘探领域之一。储层基质孔喉小、连通性差且非均质性强,裂缝发育程度成为制约油气富集成藏的主控因素,精细预测泥灰岩裂缝发育区成为工作重点。通过优选拟声波模型反演、储层参数反演、应力场模拟及属性方位各向异性等技术,准确刻画了泥灰岩空间形态、泥质含量、应力应变特征及方位各向异性特征。综合评价指出了泥灰岩裂缝发育区。预测成果为束探1H井的部署及井轨迹设计提供重要依据。钻后证实预测结果准确可靠、预测方法合理可行。

Research and Application of Forecast Technology on Muddy Limestone Compact Hydrocarbon Reservoir in Shulu Sag

The muddy limestone compact hydrocarbon reservoir in Shulu sag is one of the important exploration areas in Huabei Oilfield because of its abundant remaining resources. The matrix features in small pore throat, weak connectedness and strong anisotropism. As the development of fractures is a decisive factor to hinder the pay bed from forming reservoirs, precisely forecasting the muddy limestone area has become a key emphasis in work. Techniques of pseudo-acoustic wave inversion optimization, reservoir parameter inversion, stress field simulation and attribute azimuthal anisotropy are used to accurately depict the spatial pattern, shale content, strain-stress characteristics and azimuthal anisotropy of the muddy limestone, based on which indicates the development area of muddy limestone fracture. The forecast finding provides important reference for the ST-1 H well geometric arrangement and track design. The drilling result proved the accuracy of the forecast result and feasibility of the forecast method.