渤海缝网压裂组合支撑剂导流能力影响规律研究OA

The Bohai Sea oilfield has abundant low-permeability reserves,which are important replacement resources for in-creasing reserves and production.Among them,the C Oilfield in the Bohai Sea has well-developed natural fractures in the buried hill reservoirs.Volume fracturing to create complex fracture networks is a key technical means for development.To address the issue that the influence law of single-layer proppant placement of secondary fractures on conductivity is still un-clear during network fracturing,a prediction model for the conductivity of secondary fractures with multi-size distribution was established based on the plane contact theory.The correctness of the model was verified through model degradation and ex-perimental analysis,and the influencing factors were analyzed.The research results show that increasing the proportion of large-sized proppants is beneficial to maintaining the width of secondary fractures;the permeability of secondary fractures is approximately linearly and positively correlated with the proportion of large-sized proppants;in the case of multi-size prop-pant combinations,as the proportion of large-sized proppants increases,the conductivity of secondary fractures improves,and large-sized proppants play a key role in conductivity.The research conclusions provide theoretical guidance for the selection of proppant sizes in the fracture network fracturing design process in the Bohai Sea.