Fracture length of fractured well is the important factor to determine the fracturing effect. Taking the diamond shaped inverted nine spot pattern in a block of Xinjiang oilfield as an example, based on the reservoir numerical simulation software.Considering the starting pressure gradient and stress sensitivity, the cumulative degree of reserves recovery of crude oil is simulated under the conditions of different fracture length. The relationship between the reserves recovery degree of hydraulic fracture and comer well, edge well and central well is analyzed. The comparison results show that: the fracture of edge well may give rise to the invasion of injected water, corner well cannot be affected by injection well, causing the precipitous decline of production rate in corner well. For the central injection well, it is not only to reduce the fracture length in order to improve the water drive spread coefficient, but also to ensure that the length of the fracture is enough to supplementary formation energy. The best solution: the diversion capability of fracture is 20 μm2·cm,the fracture length of corner well is 100 to 120 meter, the fracture length of edge well is 50 meter, the fracture length of central well is 50 meter. This conclusion provides new recognition for the optimization of fracture parameters.

The MA18 block of Xinjiang oil field belongs to lowpermeability reservoir, whose pressure sensibility is medium to strong. Fracture is adopted to develop this block. The effect of fracture was simulated by diamondshaped inversed 9 point pattern using Eclipse. The threshold pressure gradient and the voltagesensitive effect were taken into consideration in this pattern. Considering the position diversity of edge well，corner well and central well in the field of seepage flow， the different length of fracture was simulated In this way, the optimum parameters of the fracture were obtained. Finally, the regression relation of the fracturing effect and the fracture parameters acquired by the simulation of FracproPT were got which could guide the construction of optimal project efficiently.

Distribution of sand body in CⅢ Formation Tazhong 40 well block is complicated and reservoir heterogeneity is strong. Taking deterministic modeling and stochastic modeling method into consideration, the structural model, sedimentary microfacies model and attribute model controlled by microfacies of CⅢ Formation Tazhong 40 well block were established by Petrel software in which the sedimentary microfacies model was established under four restrained mechanisms, then the recalculation of the geological reserves was also completed on the basis of the models. Research shows that the microfacies which can store the oil was dominated by highenergy foreshore sandsheet, the porosity and permeability of the third layer were better than that of the first and second layer in research area obviously. What's more, the value of geological reserves calculated by threedimensional geological model was objective and reasonable, which layed the foundation for further development and adjustment of CⅢ Formation Tazhong 40 well block. In general, it owned reference significance for the application of faciescontrolled modeling insimilar area.