Applied Mechanics and Materials Vols. 522-524

Abstract: Comprehensive analysis by sedimentology,with the exercitation of sedimentology theory,developed the old sedimentary viewpoint.Research considered that braid river deltainfilling shallow lake developed in the lower segment of Guantao formation,and meandering river shallow water lake deltaoxidizing shallow water lake developed in the upper segment of Guantao formation.Lacustrine depositional model is extensive to apply in exploration activity.

Abstract: As the reservoir heterogeneity causes that the production accumulation of gas well has the large differences among gas wells and the gas production of a few wells decline fast, the 3D gas reservoir modeling is used for the reservoir heterogeneity characterization. By the 3D gas reservoir modeling of integrating the geological facies information into the facies modeling, a reasonable model of He8 and Shan1 formation was built, which includes the structural model, the facies model, and the reservoir properties model. Based on the model analysis, the gas sandstone belt distribution lies along the direction of from north to south. The gas sandstone in the 4, 5, 6 small layers of He8 and the 8 small layer of Shan1 is better than others. The horizontal well positions were proposed in the study area with better gas sandstone in the 3D gas reservoir model.

Abstract: Taking M reservoir of D field as an example, analyzing the development feature of a thick sandstone reservoir in the high water cut stage which is driven by natural water, and studying the distribution law of remaining oil for this reservoir through 3 aspects: sweeping of the edge-bottom water, completeness of the well pattern and barrier of the partial interbed, and expounding the development method and effect of this thick sand reservoir in the high water cut stage through exploiting 3 kinds of remaining oil rich regions as fellows: the region which is not swept by the edge-bottom water; incomplete region of the well pattern and barrier region of the partial interbed.

Abstract: The Wangpan mountain of Jiyuan Oilfield Chang 8 is a typical "three lows" reservoir, reservoir thickness, tight reservoir, strong heterogeneity. Reservoir reconstruction method using conventional fracturing, well productivity is low, decreasing rapidly. By analyzing the characteristics of the reservoirs, and draw the same type of reservoir development adjacent experience in conventional fracturing on the basis of a multi-stage sand fracturing test techniques, and achieved good yield.

Abstract: This paper, using ECLIPSE for the research of reservoir numerical simulation, got the oil-water distribution and the situation of reserves distribution based on three-dimensional visualization of geological model in 110 block. Combining the effects of development experiment, this paper implemented the optimization of development scheme and parameter design of reservoir engineering which used the method of numerical simulation for Chang110 block. At last the optimal reservoir development model was chosen to attain the goal of gradual development of Changchunling reservoir.

Abstract: Three dimensional (3D) models provide insights into the distribution, external and internal geometry of the reservoirs. The core description shows that the fourth segment of Funing Formation (E1f4), Oubei Block, Jinhu Depression mainly develop delta front subfacies which included underwater distributary channel, mouth bar, sand sheet and so on. Well data and structural maps were integrated to build 3D structure model and sedimentary microfacies model of Oubei reservoirs using stochastic simulations with geometry data. The result of facies-controlled property model can reasonably reflect reservoir characteristics in detail, providing a reliable geological model for late reservoir adjustment and valuable reference for numerical reservoir simulation as well.

Abstract: Longmenshan earthquake fault zone has experienced several earthquakes in history, the formation is extremely broken and contains some very loose and strong water-sensitive shale formation. Due to the complexity of engineering of geological conditions, drilling accident-prone. In this paper, for example WFSD-4 well, and use of ANSYS Workbench to establish a simplified of fracture accident of WFSD-4 well drill collars, analysis stress and fatigue damage of BHA model. The results showed that the maximum stress occurs at the bottom of the drill string, the first position of fatigue failure is in the drill string at the bottom of the drill bit, the entire drill string fatigue life is 1.66 × 10e9 cycles, and through the analysis to guide the design, manufacture and use of BHA.

Abstract: For occurring frequent thin seam rock burst disasters in deep mining stage in Xinxing Mine, through summarizing the mineral basic geological and mining conditions, on this basis, analysing the occurrence characteristics of rock burst with statistical method in Xinxing Mine, analyzing the inducing factors of thin seam rock burst, and through FLAC3D roadways along on 41,051 workface exploitation right beside left stacks of rock burst was simulated, and made a rock burst prevention focus for the impact of land pressure control system provides an effective basis. On thin hard coal burst prevention of important guiding significance.

Abstract: In working mining process of No.108 coal seam in Shengli Mine, the lower triangular goaf area hanging arch caused shock pressure. For this, The theoretical analysis do this weaken the roof through the roof-broken blasting technology, to optimize blasting design parameters, combined with the actual situation of the working surface to improve the blasting process, improve the top relief solve risk technology and solve the problem of rock burst. The application shows: successful implementation of advanced deep hole pre-splitting blasting to address a key challenge for charge and blasting technology, effective control of the roof power mutation occurs, improve the safety factor of the mining area, and provides an important mining work under similar conditions.

Abstract: The stress state characteristic of the cutting roof roadway region was simulated and analyzed by FLAC3D. The results showed that the low side of return airway and gas roadway had higher vertical stress while the horizontal stress concentration was obviously in floor and low side of the return airway, the stress of cutting roof roadway was obviously, thus the level of rock burst hazard increased. range of stress concentration are 5~10m when using cutting roof roadway, thus distance between two cutting roof roadway are no less than 20m, to avoid stress concentration regions by two adjacent cutting roof roadway superposition.