A Study On Improving Development Effect In Jia409-jia256 Area In North Of Yaodian

Jia 409- jia 256 wellblock in north of yaodian covers an area of 7.1 km2, 300, oil and water Wells in long 6 as the main reservoir, the man problems are: the low single-well production capacity(average nissan 196 kg/d) of oil, water/water channeling is serious(71 occurred flood water channeling), and some of the water injection well difficult.Face to face with these problems, this study from the layer division(divided into four reservoir section 11 small layers), the long 6 low permeability reservoir matrix characteristics research; Structure, sedimentary facies, reservoir and study the characteristics of structures, Natural cracks, micro cracks and artificial fracture characteristics research.On the basis of a large number of dynamic statistics and the oilfield development situation, and analyzed the oilfield injection-production contradictions and to differentiate, find out the single well production capacity is low in the study area, water/water channeling is serious, and the difficulty of well water injection development contradictions mechanism, and draw the injection-production contradictions map. In order to further deepen the understanding, studied the oil and water movement rule, to calculate the residual oil distribution.Through the above comprehensive study, this paper puts forward some countermeasures for development adjustment technology, including pattern, development horizon and water injection system, the types of measures optimization(chose the single well and horizon) aspects of adjustment, and some other adjustments such as oil displacement profile control and water plugging, changing wettability of rocks, etc. Even puts forward some countermeasures to unconventional adjustment test, which create a small area, on the study area for seam(net + temporary plugging slug) fracturing + reverse wetting stimulation test late development.