CNPC Chuanqing Drilling Changqing Downhole Oil Test Pneumatic Fracturing Acidification Workload Hits

Issuing time:2020-04-21 08:21

CNPC Chuanqing Drilling Changqing Downhole Oil Test Pneumatic Cracking Acidification Workload Hits a New Domestic High

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【Summary】:




On December 10, with the completion of the fracturing of Well Wei 305-side 19, the 4 inch casing in the side drilling of Zhongyuan Oilfield was sealed with a mechanical packer and the two-layer fracturing test was successful. In recent years, the lateral drilling of 4-inch casing suspended in 5-1 / 2-inch casing in Zhongyuan Oilfield has been increasing year by year, and the demand for fine-grained and fractured lateral drilling is increasingly urgent. To this end, Zhongyuan Petroleum Engineering Underground Special Operations Company organized technical personnel to actively carry out project research. Through 8 years of research, testing and improvement, the technology of 4 inch casing sealing and splitting and splitting pipe strings has gradually matured. The reliability of a single tool, Stability and safety meet design







On December 10, with the completion of the fracturing of Well Wei 305-side 19, the 4 inch casing in the side drilling of Zhongyuan Oilfield was sealed with a mechanical packer and the two-layer fracturing test was successful.



   In recent years, the lateral drilling of 4-inch casing suspended in 5-1 / 2-inch casing in Zhongyuan Oilfield has been increasing year by year, and the demand for fine-grained and fractured lateral drilling is increasingly urgent. To this end, Zhongyuan Petroleum Engineering Underground Special Operations Company organized technical personnel to actively carry out project research. Through 8 years of research, testing and improvement, the technology of 4 inch casing sealing and splitting and splitting pipe strings has gradually matured. The reliability of a single tool, Both stability and safety meet the design requirements.


   Well 305-side 19 is an oil well in the No. 3 Oil Production Plant of Zhongyuan Oilfield. This segregation is divided into layers and needs to be sealed in the logging section; fracturing the lower layer to protect the upper casing; before unsealing, Open the constant pressure valve for circular well washing and degassing operations. In response to the fracturing process requirements, the Zhongyuan Downhole Technology Development Center preferred the Y221-80 packer, spray anchor assembly, stabilizing anchor and other auxiliary tools to combine a new set of fracturing process string for this well. After the fracturing test, the conductivity of the side-drilling oil layer was improved, the formation seepage conditions were improved, and the requirements of the two-layer stratum reconstruction of the fixed pipe string at a time were met.


   The fracturing of Well Wei 305-side 19 was successful, which opened a prelude to the production of a 4-inch set of wells in Zhongyuan Oilfield to be finely sealed and fracturing.


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