2012, Volume 14, Issue 4
Strategic Study of CAE >> 2012, Volume 14, Issue 4
A case study of oriented perforating technology for the multiple crack fracturing
Changqing Oil and Gas Technology Institute, Xi'an 710021, China
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Abstract
It has been proved by successful experimental study and application of the new fracturing technology, which create two fracture, significantly improving contact area between fracture and low permeability reservoir, and increasing productivity as well. Normally the permeability of the low permeability block in the Changqing oil field is below 0.5 mD by low-permeable cores analysis. It is a tough task to development the oil through the general methods due to geological condition, watering well distribution and fracturing technology. Volume fracturing is proposed to increase the productivity by multiple crack fracturing since 2006 in Changqing oil field. The fracture initiated from the hole by the perforating shot, then turn the direction of the maximum level principal stress in the physical model research. Two lines of perforating shot are fired in the different depth of the oil reservoir, with an angular between the shots and the maximum level principal stress, liking letter “X”, paralleling in the distance. The oriented perforating technology for the multiple crack fracturing is presented and applied in the Changqing oil field. It is proved that multiple crack created by the downhole microseismic monitoring, productivity also increased 38.1 % compared to the adjacent by oriented perforating and multiple crack fracturing, the characteristics of the reservoir has been analyzed.
Keywords
oriented perforating ; fractural diverting ; multiple crack fracturing ; discharge volume ; increase in production
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