Papers by Keyword: Fault

Abstract: Time-space-source dynamic controlling sand theory emphasized the size, supply and distribution of the source changes with time and space. Based on this theory, ramp-type, half-graben type and slots, grooves parallel-type sand control modes were established at Surennuoer oil field. According to the attribute maps and the sandstone thickness maps, the sand scope of nantun group can be determined, after identified the sand control point by using the fault throw statistic and 3D visualization technology. Sedimentary facies and the single well integrated histogram were used to verify the accuracy of the sand body divided. The results showed that: the sand control scope divide very accurately,and the sand control scope dovetail nicely with turbidite fan, braided channel and other sand-rich sedimentary facies.

Abstract: 3D GIS is a useful modeling tool, which can greatly improve the efficiency and accuracy of the geological modeling, meet the requirements of modeling in complicated geological area. A typical 3D geological model is composed of one or a plurality of stratum, structure, fault etc. In this paper, we divide geological body into blocks, determinate each levels block boundary, build single block model, couple them up in 3D space. Combining with variation characteristics of 3D geological body, by manual interpretation or second derivative method, we get their distribution characteristics of fault unconfirmed by drilling. Through 3D GIS visualization and space analysis, we can not only be facilitate to manage drilling data and visualize underground geological body, but also analyze fault characteristics from a real angle, confirm their boundary, get ore body distribution characteristics, and provide credible digital model for ore grade analysis.

Abstract: For Xuefengshan tunnel, supporting stability in the course of tunneling is analysed by use of changed parameters of construction and design, which is based on construction simulation of left tunnel in the fault. It was shown that tunnel structure can keep stability after advanced little pipe injection grouting is used and supporting parameters and excavation model are changed. It can provide scientific evidence for directing construction and ameliorating supporting parameters, and it can reduce loss which is resulted by heavy collapse because of incorrect support.

Abstract: Taking section W400 of Fushun west open-pit coal mine for the research, the interface model of fracture zone and surrounding rock was established. FLAC^3D is used to analysis the influence of excavation and backfill of open-fit coal mine to the slope stability and deformation. The numerical results and analysis show that: (1) when the open-pit coal mine slope is excavated to final production line, the safety coefficient is 2.98, with the excavation, the deformation of the Fushun No.1 Refinery Factory area increases. (2) With the increase of backfilling, the slope coefficient increases to 3.32, this will reduce the deformation of the Fushun No.1 Refinery Factory area. Furthermore, the positions of the dangerous slip surface and serious deformation part of factory area should be regards as key areas. These conclusions could provide technical basis for the stability analysis of Fushun west open-pit coal mine.

Abstract: Erasure codes received extensive attention in the cloud storage system because of its effective on saving storage space,However, due to the high recovery-overhead of erasure code, its application has been limited in these storage systems.For these problems,in this paper,we presents A multi-server Erasure code algorithm based on the degree of restriction to reduce the recovery-overhead from the restriction of date and parity's degree,and enhance the system performance to a certain extent ,ensure the reliability of the data of the cloud storage environment.

Abstract: In order to ensure the normal operation of the hydraulic system, the faults must be found and eliminated promptly and accurately. Most of the faults of hydraulic system don’t happen suddenly. generally, there are signs such as noise, vibration, lash, pollution and leakage etc.. If these phenomena can be found, controlled and eliminated promptly and properly, the system faults can be reduced accordingly. This paper introduces several common faults of hydraulic system and the elimination methods. which the hydraulics technicians can refer to.

Abstract: The output of fracture pool is over half of the entire outout of oil and gas,and fracture pool is one of the important fields of oil inhancing yield in 21st Century. Fractured reservoir evaluation is always a huge challenge for the oil exploration and development. Budart Group of Sudert district in Hailaer Basin is a reservoir that has very low porosity、very low permeability、double pore system and it is rich of fracture. The paper summarized Hailaer Basin Budart Group reservoir’s characteristics, especially fractures’s characteristics in conventional logs,fracture’s parameters,such as fracture density,dip,width and filling and illustrate the response of low angle fracture and high angle fracture in logs.

Abstract: Based on the analysis and the induction of electronic control fuel injection engine common failure which can't start, and according to the engine’s working principle and failure mechanism, established the electronic control fuel injection engine’s fault tree, and having made qualitative analysis about the working reliability of the engine by using the fault tree analysis method. This paper offered the electronic control fuel injection engine’s failure form which can’t start in classification, discussed the process of establishing the fault tree at length, even built and mapped the engine’s fault tree which can’t start; According to the natural gas compressor’s fault tree diagram, and applying the descending method to get the fault’s minimal cut sets. By making qualitative analysis, finding out the main influence factors of failure, and putting forward quite perfect methods of removing fault, which providing electronic fuel injection engine maintenance with the beneficial reference.

Abstract: The existence of abundant hydrocarbon has been discovered in the Yakela Fault-convex, Tarim Basin, after reconstructing and superimposing for several periods. Through interpretation of 3D seismic data up to date, combined with the circumferential field geology, after comprehensively analyzing the characteristics of development on hydrocarbon migration passages and its relationship with hydrocarbon accumulation, this paper holds that it is divided into fault type, unconformity type and carrier bed type in the Yakela fault-convex. The unconformities and the carrier beds are the main lateral migration passage of gas and oil for long distance. The faults are the main vertical migration pathway of hydrocarbon, and the hydrocarbon can arrive at any strata with fault. It is significant to know the hydrocarbon migration pathways in the study area for exploration in future.

Abstract: The quantity and availability of water injection are affected by geological environments in complex small fault-block oilfields, especially nearby faults. It is a general method to qualitatively determine fault sealing ability by water injection availability. The availability analysis of several injection wells can judge sealing ability of five faults of block M28-1 in JD oilfield. The water injection data show that fault F1, F4, F5 are main areas of pressure releasing for unsealing. Fault F2 and F3 are distributed on each side of the water injection well, which have a little influence on loss of water injection for sealing.