The Study On Fracturing Potential And Method Of Nearby Field

1. By analyzing the geological factors which impact the fracturing effect of nearby field, combined with the fracturing simulation results of inverted nine spot pattern, the mathematical models of the relationships among some key parameters such as production and reservoir pressure after fracturing, production and reservoir thickness and water content of nearby field were established, the standards of well selection, selection-layer of nearby field were determined by screening.2. Based on the characteristics of nearby field, the formula of fracturing fluid system were optimized, according to results of optimization of the fracturing fluid, the following formula is recommended: base fluid: 0.40% Gua Gum +0.07% cleanup additive +0.05% demulsifier SP-169 +1.0% KCl, crosslinked fluid: 0.90% borax, crosslinked ratio: 20: 1, breaker: 0.10% potassium persulfate.3. Through the study on fracturing simulation, based on the analysis of influence that fracture parameters on oil increment and cumulative oil increment after fracturing in the situation of inverted nine spot pattern of nearby field, to determine the optimum fracture penetration ratio should be 0.30 ~ 0.35 (Fuyang reservoir 0.6 ~ 0.7), the optimum fracture conductivity is 30 ~ 35dc.cm.4. According to the fracturing circumstances of surrounding similar block, integrate with the above analysis, the reasonable fracturing approach of nearby field was determined, some measures which can further reduce the injury of fracturing fluid were proposed, such as efficient cleanup for weak zone, recommended to make use of staged fracturing technology and the particle size of Putaohua reservoir is 0.45 ~ 0.9mm, ordinary quartz sand as a proppant and for Fuyang reservoir, ceramsite is proppant. Identified the fracturing parameters of ten single wells to be measured.5. The barels oil per day of nearby field after fracturing presented exponential decline regular, according to the fracturing production data of 10 wells, established the indicators prediction model of fracturing stimulation measures for oil well, and taked well W2-18-14 as example, to forecast the yield, water content changes regular.6. Economic evaluation results, the fracturing measures of nearby field are feasible.