CNPC Chuanqing Drilling Changqing Downhole Oil Testing Gas Cleavage Acid Work Volume Hits Domestic N

On December 10th, with the completion of the fracturing construction of Wei 305-side 19 well, the mechanical sealer was used to seal the 2-layer fracturing test in the 4-inch casing of sidetrack drilling in Zhongyuan Oilfield.

In recent years, the lateral drilling of 4-inch casing with a 5-1/2-inch casing suspension in Zhongyuan Oilfield has been increasing year by year, and the demand for fine-bedded fracturing in side drilling has become increasingly urgent. To this end, Zhongyuan Petroleum Engineering's underground special operations company organized technical personnel to actively carry out research projects, through 8 years of research, testing and improvement, 4 inch casing within the sealed layered fracturing column technology has gradually matured, the reliability of a single tool, Stability and safety meet design requirements.

Well Wei 305-Side 19 is an oil well in the No. 3 Production Plant of Zhongyuan Oilfield. This time, the seal is fracturing in layers, and it needs to be sealed in the logging section; the lower layer is fractured to protect the upper casing; before unsealing, Open the constant pressure valve to perform cycle washing and degassing. For the fracturing process requirements, the Zhongyuan Downhole Technology Development Center selects the Y221-80 packer, spray and anchor assembly, stable anchor and other auxiliary tools, and combines the well with a new set of fracturing process strings. After the fracturing test, the ability of diversion of the lateral drilling reservoir was improved, the seepage conditions of the formation were improved, and the requirements for the two pillars of the fixed pillar to be rebuilt at one time were met.

The Well Wei 305-side 19 well succeeded in fracturing and opened a prelude to the production of 4-inch casing wells in Zhongyuan Oil Field to the production of fine-clad fracturing.