Ultra-deep-sea phase-long horizontal wells in western Sichuan gas field achieve high production

A few days ago, the Southwest Oil and Gas Branch of the Sichuan West Sichuan Gas Field, the ultra-deep ocean facies long horizontal section well-Pengzhou 4-4D well, obtained daily unblocked flow of 1.

The upper Lei 4 subsection of the main gas reservoir in the West Sichuan Gas Field has a buried depth of 5800-6200 meters and a gas field area of ​​138.

In the geological design, the Southwest Oil & Gas Branch summed up the previous implementation experience, further optimized the high-quality reservoir target window in the horizontal section, and used geo-steering technologies such as high-resolution waveform indication inversion and small-layer modeling to optimize and adjust the trajectory in a timely manner.

During drilling construction, Southwest Oil & Gas Branch overcomes the problems of poor local cementation of the formation and instability of the wellbore, and jointly tackled key problems with construction units and universities, and carried out pilot tests of white oil-based strong plugging drilling fluids to ensure the smooth progress of fracturing construction.

In the acid fracturing construction, Southwest Oil & Gas Branch adheres to the integration of geology and engineering, adopts liner sliding sleeve splitting technology, overcomes the difficulty of running pipe strings in deep formations, and optimizes the completion tool level difference and large displacement acid intake.