论文部分内容阅读
储层质量钻前预测包括储层孔隙度预测和渗透率预测。碎屑岩储层的孔隙度主要与沉积相和成岩作用有关,但在沉积相相同或岩性相近的条件下,储层孔隙度则主要受成岩作用的控制。据此,该文建立了应用成岩指数ID 预测储层孔隙度的模型,预测误差小于2%,并以松辽盆地汪家屯地区登三段为例说明了这一模型的应用。汪家屯地区登三段属于浅水河道沉积,储层岩性主要为岩屑长石砂岩和长石岩屑砂岩。在东北部登三段储层处于晚成岩阶段 B期,孔隙度最高值可达 14%~16%;西部地区登三段处于晚成岩阶段C期,储层物性较差,孔隙度最高值为10%~12%。
Prediction of reservoir quality before drilling includes reservoir porosity prediction and permeability prediction. The porosity of clastic reservoirs is mainly related to sedimentary facies and diagenesis. However, under the same or similar lithology, reservoir porosity is mainly controlled by diagenesis. Based on this, a model for predicting reservoir porosity using diagenetic index ID was established and the prediction error was less than 2%. The application of this model was illustrated by taking Deng 3 section in Wangjiatun area of Songliao basin as an example. The Deng 3 section in Wangjiatun area belongs to shallow water channel sediments. The reservoir lithology is mainly lithic feldspar sandstone and feldspar lithic sandstone. In the northeastern region, the third member of the third member is in late-diagenetic stage B, with the highest porosity of 14% -16%. The third member of the western region is in late-diagenetic stage C with poor reservoir properties and the highest porosity value is 10% ~ 12%.