Study and application on DX-9 selective water shutoff agent in horizontal well
In horizontal well production,edge water or bottom water channeling is a serious problem,in order to control water with stable oil and improve oil recovery,a chemical water shutoff agent DX-9,which can be used for selective water shutoff in horizontal wells,is introduced,the performance of the plugging agent system and the application of influencing factors are also studied.The results show that the selective water shutoff agent DX-9 has the advantages of controllable curing time,high curing strength and tough-ness,good injection performance and erosion resistance.The maximum breakthrough pressure gradient can reach 41.2 MPa/m,the core plugging rate can reach 99.23%,which can satisfy the selective water shut-off application of horizontal well in Yanchang oilfield.
horizontal wellselective water shutoff agenturea formaldehyde resin
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