The Study On Fracturing Technology Of Yan’an Formation Chang6Reservoir In Qilicun Oil Field

Qilicun Oil Production Plant is a century-old factory, which the first well of the continent was born here. Chang6reservoir, the major reservoirs of exploration and development layer, which has the typical characteristics of shallow burial, low voltage, super low porosity and ultra low permeability.For the problem that Qilicun oil field currently had not yet form a complete set of fracturing stimulation technology system,by collating the research over the years, analysing reservoirs parameters and fracturing operation parameters,as well as the production of fractured wells,combined fracturing process optimization experience and cognition in2007-2011,Conduct a series of research focusing on different blocks, reservoir conditions, fracturing combination of parameters, and the effects of fracturing process.Based on fracturing parameterS,thorough fracturing stimulation pattern were formed by the scientific research and fine design.The results indicate that, the Yan’an Formation yield ideas should be based on the sand fracturing, increased fracture length to increase the effective supply radius.New type of low damage fracturing fluid system, which combined with the technology of fracture morphology before fracturing, could improve the production of single well;From the research result of this paper, a shallow reservoir construction technology, which fit for Yan’an Formation were formed. The technology is suitable for different reservoirs, especially Active water fracturing technology, and Critical crosslinked fracturing technology as the main technology at this stage, have greater adaptability and Explore and find out a method of fracturing techniques and fracturing parameters optimization for river delta。...