Bi-crosslinking network system oil-based plugging gel polymer and preparation method and application thereof

The invention relates to the field of oilfield chemistry, and discloses a bi-crosslinked network system oil-based plugging gel polymer and a preparation method and application thereof. The polymer contains a structural unit A, a structural unit B, a structural unit C, a structural unit D and a structural unit E. The structural unit A has a structure as shown in a formula (1). The structural unit B is a structural unit with a structure as shown in a formula (2); the structural unit C is a structural unit with a structure as shown in a formula (3); the structural unit D is a structural unit with a structure as shown in a formula (4); the structural unit E is a structural unit with a structure as shown in a formula (5). The polymer provided by the invention has relatively good filtrate loss reduction effect and plugging effect, can be suitable for stratums with different pore sizes, and has the pressure bearing capacity as high as 15 MPa. 本发明涉及油田化学领域，公开了双交联网络体系油基堵漏凝胶聚合物及其制备方法和应用。该聚合物中含有结构单元A、结构单元B、结构单元C、结构单元D、结构