Optimized Design Of Fracturing Technology Based On Reservoir Characteristics Analysis And Treatment Post-evaluationin In Yan-63 Block

Hydraulic fracturing technology has been developed for 71 years since 1947 and is widely used in the development of oil and gas fields,.The development of fracturing technology have greatly promoted by the fracturing optimization design,fracture diagnosis and the fracturing materials.Hydraulic fracturing is no longer just a single well stimulation method both applies on the production wells and injection wells,but it is closely combined with reservoir engineering and has been used to adjust interlayer contradictions.It improves oil displacement efficiency,producing reserves,oil recovery and powerful technical measures of oil field development benefit.In investigating the hydraulic fracturing fracture,on the basis of calculation model,with wild goose microseismic monitoring data of 63 2-4 Wells,respectively to the PKN,GDK,quasi three-dimensional and real 3D model for wild goose 63 wellblock of fracturing model selection.It is finally confirmed to quasi three dimensional model for subsequent calculation model of fracturing design and optimization.In this paper,the important factors such as reservoir property,sensitivity and rock mechanics property are analyzed,and the conclusion is applied to fracturing design.Based on the single well logging curve obtained and the extensive investigation,a set of transition methods of logging curve and geostress profile suitable for Yan63 well area was summarized.Based on this method,the single well rock mechanical parameters and geostress profile interpretation were carried out for multiple Wells in Yan63 well area,and the foundation of single well fracturing stress distribution was established.Subsequently,X-ray diffraction and rock thin section identification were carried out for the core of Yan63 block.On the basis of fully understanding the petrology and mineralogical characteristics of well Yan63,a single-well underground core sensitivity test was conducted,including velocity sensitivity,water sensitivity and alkali sensitivity.The experimental results show that this area has a strong alkali sensitivity characteristic,which matches the high content of quartz in rock ore analysis.This paper focuses on the geological reservoirs in Yan63 well block,and analyzes important factors such as reservoir property,sensitivity and rock mechanics characteristics,and applies the conclusion to fracturing design.As the completion of Yan-63-136 well's fracturing design,adopt the method of a single parameter analysis of the optimal value step by step,the scale in the original design was optimized.And other engineering factors such as viscosity of fracturing fluid,proppant concentration is also inclueded,.And then engineering parameter optimization methods have been formed,finally determined the optimization parameters are as follows in Yan63-136 well:optimization fluid scale should be controlled between 161-180 m~3;The optimal pumping rate should be controlled between 4-4.5m~3/min;The optimum viscosity should be about 120m Pa·s.The optimum proppant concentration should be controlled between 700kg/m~3-800kg/m~3Finally,using the method of feature identification of G function curve,the qualitative correspondence between the fracture morphology and the curve shape is illustrated with the example of Yan63-136.The peak value of G·dp/d G is mainly 3,indicating that the fracture size formed after fracturing is limited.At the same time,the peak value of hydraulic fracturing G·dp/d G is mainly 4,and the individual Wells can reach up to 5.The fracture morphology formed by the hydraulic fracturing is mainly composed of symmetrical double wings.It is found that the injection hydraulic fracturing can achieve better results by the comparison of the effect of the hydraulic fracturing.