Abstract:

The glutenite body of the fourth member of Shahejie Formation in Yong 1 block of Dongying Sag is characterized by huge thickness, multi-period superposition and serious heterogeneity, and the development rule of effective reservoirs is unclear, which leads to poor development effect. Based on core observation, combined with rock thin sections, casting thin sections, mercury intrusion parameters and petrophysics, the main geological factors influencing its physical properties were systematically studied. The results indicate that this area is fan-delta deposition, with both onshore and underwater deposition. The physical properties of glutenite reservoir are mainly influenced by sedimentary condition and diagenesis, between which there is a relation. Sedimentary condition determines that different microfacies have different combination of lithofacies, and this difference also affects the reservoir properties. The braided channel in fan delta front is rich in pebbled sandstone facies and medium-coarse sandstone facies with better physical property, and it is favorable for in the deveolpment of effective reservoirs. On the other hand, the front fan delta has higher content of fine siltstone, with poor physical properties, so it can not serve as the development area of effective reservoirs.

Key words: water flood field , water cut prediction, water cut model, Shuanghe Oilfield