Study On The Technique Of Oil Production Increasing To Wells In Baima Block Xifeng Oil Field

Baima area is quite low permeability reservoirs and Chang 8 reservoir is mainly production layer. Which has low porosity and low permeability and its average porosity is 10.5%, average permeability is 2.72 milli Darcy. The main development pattern is the diamond-nine-spot well network and after local flooding it turns into water injection. Since 2003 the area was put into the large scale of development, due to the strong reservoir heterogeneity, fracture and pollution as well as other factors in process of reservoir development, the block production capacity decline rapidly and water cut rising fast, the main problems at present are increasing plugging well, more wells and low output, high containing wells, which has serious impact on the efficient development of block.In this research, aiming at the present problems of the block, we work on the block sensitivity evaluation and Research on formation mechanism and analysis of mechanism, scale components, providing an important basis for the later acid system optimization and optimization measures. At the same time, the high water within the block, using horizontal well hydraulic jet fracturing technology ideas. We developed the technique of repeated fracturing hydraulic jet from the jet fracturing parameters, stimulation mechanism, fracturing string, adaptability and other aspects of the new orientation and Research on this technique, which is the initial formation of the application of hydraulic in high water jet refracturing technology system, achieving remarkable results in the promotion and Application of the Baima and other blocks, providing the effective means for the Triassic in low permeability reservoirs with high residual oil wells tapping. For low yield wells and wells blocked, draw tight oil Volume transformation of ideas, we carry out the old wells water mixed refracturing technology research, the initial formation of the applicable in Baima area of low yield wells water mixed refracturing technology system and field application effect is remarkable, compared with the conventional fracturing there are some obvious advantages, and provided new means and methods for improving per output of the next similar wells.Through systematic research, the main problems existing in the Baima area are effectively solved,which provides effective technical support for the oil well measure to yield and long-term stable production.