Before end 2013, Orion has designed and implemented horizontal well section geo-steering drilling for more than 210 multiple branches wells, drilling footage for CBM horizontal well was over 800,000 meters, and an average coal bed drilling encounter rate was greater than 90%. Apart from geo-steering under normal conditions, Orion can offer complex environmental geo-steering services:

single branch horizontal well geo-steering

multiple branches horizontal well geo-steering

thin layer horizontal well geo-steering

complex geological structure horizontal well geo-steering

Maximizing area of control with minimum drilling footage

It was in a xxx block at Qinshui Shanxi province, a multiple branches horizontal well has the TVD 120 meters, which required avoiding coal mining face. With refined geo-steering engineering of horizontal well section and 10 days well drilling cycle, it had drilled 8 branches with production bed drilling footage of 4,888.00 m, the pure coal drilling footage was 4,878.00 m, production bed drilling coal encountering rate was 99.80% and the single well’s control area was 0.71 km2.

Comparison of design and actual drilling trajectory

Complex structural horizontal well geo-steering

In the process of drilling, with DWM data acquisition and geological and logging data analysis, auxiliary 3D geological modeling software, Orion can accomplish long horizontal well sectional wellbore deployment in answer to sudden change of production bed dip angle, thinning out of heavy production bed, discontinuity and developed faults, etc.

Geo-steering of thin bed and discontinuity production bed

Developed faults

Tracing dip angle change