川东北河坝地区储层预测与评价

Prediction and evaluation of reservoirs in Heba area, the Northeastern Sichuan Basin

针对河坝地区储层埋藏深、成岩作用强、非均质性严重、含气富集条件复杂等地质特点,对河坝地区进行了地层划分和对比、沉积相研究、储层基本特征分析、测井解释、储层预测、储层定量综合评价等研究,建立了河坝地区储层沉积模式,确定了储层的储集空间类型.预测了储层的空间展布、评价出有利储层发育区,形成了一套适用于河坝地区储层预测和综合评价方法。

Reservoirs in Heba area are characterized by large burial depth, strong diagenesis, extreme heterogeneity, and complicated gas accumulation conditions. Based on stratigraphic division and correlation, study of sedimentary facies, analysis of basic features of reservoirs,logging interpretation, and reservoir prediction and quantitative evaluation in Heba area, depositional patterns of these reservoirs are established, the types of reservoir space are defined,the spatical distribution of the reservoirs are predicted, and the favorable areas for develop- ment of quality reservoirs are evaluated. A set of methods that are suitable for prediction and comprehensive evaluation of the reservoirs in Heba area is presented.