鄂尔多斯盆地镇北——演武地区长3段含油性分析及有利区预测

以储层地质学、开发地质学和地球化学的相关原理为指导,采用一个原则、一个规律及一个依据的预测模式对鄂尔多斯盆地镇北一演武地区长3油藏有利含油区进行了综合研究.一个原则即两个为主、一个为辅的原则;一个规律即储层沉积规律;一个依据即以试油或开发数据为依据.研究表明,水下分流河道和河口坝微相发育区是镇北长3段有利的含油相带;厚砂岩沉积区是含油的有利砂体发育区;隆起高部位是含油的有利构造部位;地球化学运移指标急剧变化的主流方向是油气富集的方向.

Oil-bearing Potential and Prediction of Favorable Oil-bearing Reservoirs of Chang 3 Formation in the Zhenbei-Yanwu Region

An integrated geology research was used to predict favorable oil-bearing reservoirs in the Zhenbei-Yanwu region according to the principle of reservoir geology, development geology and geochemistry. The method includes a principle, a rule and a gist. The basic principle is that two are dominant and one is auxil-iary. The rule is namely sedimentary regularity. The gist is both development data and test data. The re-sult shows that the facies of subaqueous distributary channel and estuary bar are the favorable oil-bearing facies of Chang 3 in Zhenbei-Yanwu. The sedimentary region of thick sandbody is favorable sandbody. The high part of paleo-uplift is advantageous structure. The rapid-change direction of geochemistry migration index indicates the direction of oil accumulation.