Research On Reservoir Reforming Method In A1A9, WeiZhoull-1Oilfield

A1well and A9well in WeiZhou oilfield are production well and water input well.production rate of A1well is lower than adjcent wells obviously,and there is also difficult in A9for inputing water.For increase production and augment injection of A1A9and seting the stage for widening hydraulic fracturing technology in oilfield,this article carrry out some researches by putting theory and reality together.Form area geologic characteristic and individual well geologic characteristic of WeiZhou11-1,the article analyses all aspects of A1and A2data and understand the reason of low production,then submit different reform skills,also analyses the difficult point of hydraulic fracturing for this two wells,then some good ways are taken out.Consider strong water-sensitive of reservoir and middle scale alkali sensitive, this reasearch select the combined clay inhibitor,research out antisludging agent CQL-2and temporary plugging additive ASR-2,while optimize the system of high temperature fracture fluid that come up to reservoir,such as thickening agent and high temperature cross linking agent YJ-1, temperature resistant reinforcing agent YW-l.by reservoir performancing appraisal,we can see this system has good aibility of medicines and temperature resistant, shearing resistant also has good aibility of viscosity break and cleanup.The average of erosion rate this system give to reservoir rock is26.1%,which belongs to a low scale,and active water’s rate is5.3%,also belongs to a low scale.Using3D Fracture software,this article simulate the Aland A9in reservoir condition,also analyses fracture section, fluids rate forecast.also this article analyses optimized drilling and intensity calibration,platfom condition,concludes the project of increase production and reforming in A1and A9,which is good for next spot work.