论文详情
四川盆地中部下二叠茅口组白云岩储层物性差、厚度薄、埋藏深且空间各向异性较强,给地震资料处理和储层预测造成困难。为明确研究区茅口组地层下一步勘探方向,以中、深层缝洞型碳酸盐岩处理成像和非均质性缝洞型储层量化描述为导向,探索并形成了多敏感曲线融合、井控高保真宽频处理、岩溶古地貌刻画、地震相带预测以及相控储层反演预测等多种关键技术。在地震资料处理方面,以提升地震资料对构造、断裂、薄储层的宽频成像精度为核心,在地震资料解释方面,以精细描述白云岩储层主要参数为目标,结合“先岩溶后储层”的评价思路,对川中地区茅口组白云岩储层进行精细解释评价,共预测了2个白云岩储层发育带,预测结果与新钻井结果吻合度较高,为下一步川中地区油气勘探开发以及井位部署提供了有力支撑。
Dolomite reservoirs of Lower Permian in the Maokou Formation in the central Sichuan Basin exhibit poor physical properties and strong anisotropy,and they usually occur as thin layers at large burial depths.These characteristics compromise the accuracy of data processing and prediction.This study concerns the imaging of fracture-cavernous carbonate rocks in medium-depth and deep layers and the quantitative description of heterogeneous fracture-cavernous reservoirs.The following key processes and methods are discussed: multi-sensitive curve fusion,well-controlled high-fidelity broadband processing,paleo-geomorphological karst characterization,seismic facies zone prediction,and facies-controlled reservoir inversion prediction.In particular,the key objective of high-fidelity processing is to improve the accuracy of the broadband imaging of structures,faults,and thin reservoirs,whereas that of the interpretation is to achieve a detailed description of Dolomite reservoirs.Based on a comprehensive analytical approach,two favorable development zones were predicted.Drilling data confirmed the high accuracy of the prediction,thereby confirming that the proposed approach can support the well deployment in central Sichuan.
国家科技重大专项(2016ZX05052-001)资助。