The Study On Remaining Oil Distribution And Water Flooding Comprehensive Treatment Of Hainai3 Fault Block In Tan Hai Oil Field

Hainan 3 block structure is located in the liaohe basin on hainan-month only the structural belt of north east,in the hainan construction steps of hainan 1 piece and on the steps of the three blocks.Development purposes for Cenozoic paleogene dongying formation in the second member of the three sections,east east substratum.Water injection development for more than ten years,at present the whole block has the characteristics of high degree of decline,high use,development problems:(1)water drive has obvious directivity,main channel direction watered-out seriously;(2)the plane injection-production well spacing inadequacy,longitudinal oil Wells corresponding relations between inadequacy;(3)the water injection development middle water water channeling is serious,most of the oil well water.The distribution of residual oil was studied by means of reservoir dynamic analysis.Using the means of production,oil and water Wells in each single sand body reservoir,oil and water Wells is connected,the basis of historical data,cut the injection of injection Wells to each single sand body,combining wellblock of oil Wells production situation draw the latest water floor plan,and analysis of the reservoir plane and vertical distribution of residual oil and water.There are five types:(1)fault,lithology,injection water control;(2)thin layer single sand control type;(3)structural control;(4)the pattern is not controlled by the well;(5)there is no mining.In 2000 after water flooding,remaining oil in different types,the single sand body as the object,the converted injection wells and improving the injection production relationship,to strengthen the use of single sand body;due to the strong,weak water flooding interference and coexistence between plane and layer lead,the implementation of layered water injection,water injection adjustment and deep flooding test residual oil;high water flooded layer top type with high mining rhythm by periodic flooding;in the well layer single channel edge reservoir variation sites,taking oil well fracturing,acidizing and other reform measures,strengthening the water flooding with poor effects of residual oil.Through the water flooding comprehensive governance,development index block to implement the plan.The composite decline fell 2.2%,down 4.6% decline,control degree of water flooding and the water drive degree gradually increase,comprehensive water content and rise rate stable.