Oil Layer Crack Recognition Of Xinzhan Oilfield And Development Ordering Strategy Research

The tectonic setting of Xinzhan oilfield which located in central depressed block of Songliao basin is in the south of Longhupao bench, it is Da'an nosing structure that pitch to northeast and the extended part, the reservoir grows fracture, belongs to a surpressure fracture-type reservoir which is argilliferous and especially low permeability. Because the oilfield oil layer is few, thickness is thin, the fault distribution is complex, the natural fracture growing, causes the Interlamination and the plane contradiction of water-injection development prominent, the water breakthrough of oil well is early, and after water breakthrough, the water-cut is raising rapidly, the decline of production is quick, the adjustment efficiency is not very well.How to control the rise of water-cut, slow down the decline of production, is an important proposition the oil-field development faces. Therefore, this article has carried out the research of adjustment engineering in Xinzhan oilfield, in order to improve the oil-field development efficiency. We have analyzed the influence the crack medium to the Xinzhan oilfield development separately, and according to the present oil field production situation, based on the geological data of Xinzhan oilfield flood-pot-test area, apply the trend surface interpolation method, forms the parameter fields such as effective thickness,permeability and so on, consult the plane distribution characteristic of flowing unit, then, carry on the effective revision to the above parameter fields apply the facies belt control method, found the geological model which adapt to numerical modeling finally, carries on the historical fitting to the block, in the precondition that the index such as the fitting reserves, formation pressure, single well water-cut, synthesis water-cut all satisfied the precision request, combine to dynamic analysis, we have studied the constant pressure injection technology, the water-injection program adjustment technology, the whole profile control technology, the injection-production system adjustment technology and the infill adjustment technology separately, explore the new way to improve development efficiency of complex fracture-type oilfield.