Due to the development of faults and fractures in the fault-fractured reservoirs in the Zhenjing area of Ordos Basin,it is easy to leakage in cementing,which leads to formation leakage sealing and affects the development life of oil and gas wells.The leaking cement slurry pollute the reservoirs and block the oil and gas flow channel,which is not conducive to the economic development of oil and gas resources.By optimizing the structure of pipe string,selecting key tools for cementing such as tubing packers,grading hoops,and cement holders,perfecting safe casing-lowering technology,and developing micro-expansion elastic cement slurry and high-efficiency oil displacement pre-fluid system,a key technology for selective cementing of fault-fractured reservoirs in Zhenjing area has been formed,which can realize the selective sealing of the annulus of borehole to ensure the effective separation of reservoirs and meet the technical requirements of stratified and segmented reservoir reform in the late stage of fractured reservoir.After 3 wells field application test,the effect is good.
fault-fracture bodyselective cementingslurrypackercement holderZhenjing area
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维普
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