A Completion Technology of Multi-layer Hydraulic Fracturing in One Trip
A completion technology of multi-layer hydraulic fracturing in Xushen Gas Field of Daqing Oil Field was developed, which was of benefit to efficiency, safety, and cost of the fracturing operation, especially to the individual well production and the formation damage compared with that in conventional hydraulic fracturing due to the replacement of the pipe string. A fracturing completion integration pipe string, in which a new type of cemented carbide hydraulic anchor was developed and other matched downhole tools including pressure guide sandblast packers were improved, was used to meet the needs of multi-layer fracturing in the gas field. The pipe string can bear a maximum working temperature of 160 and a maximum pressure of 90 MPa, with advantages of strong stability and high abrasion resistance after fracturing, so as to well satisfy the requirements of completion and production done without replacing the string. Up to the end of 2016, the technology had been applied in ten wells in the gas field, with a success rate of 100%, which can be regarded as a breakthrough for multi-layer hydraulic fracturing in deep natural gas wells in Xushen Gas Field.
KeywordsMulti-layer hydraulic fracturing Completion One trip Hydraulic anchor Pressure guide sandblast packer
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