Applied Mechanics and Materials Vols. 295-298

Abstract: Set the raw coal samples of zhaogu mine in Jiaozuo as the object of study, with a self-developed equipment for thermo-fluid-solid-stress coupling of coal containing methane, analyse the relationship between permeability of raw coal samples and the change of effective stress, resultant stress strain process of raw coal samples. Experimental results show that The permeability of coal samples have stress sensitivity, permeability represents nonlinear decreasing relationship with effective stress increasing, Possess the law of negative exponent,This is consistent with the results of previous studies. During the full stress-strain process, strain increases with the stress increasing, penetration rate changed with the strain of the coal sample Increase after reducing ,on compaction stage stage and elastic deformation stage, transfusion decreased with stress increased , on yield deformation stage, permeability of coal samples reached minimum and began to overtake, on brittle break stage and residual strength stage, permeability increased by a large margin, mainly due to the coal macroscopic fissures.

Abstract: A long period of development in Haituozi exploration area, downhole conditions are constantly changing, increasingly complex, and the original cementing technology is difficult to solve the region's low pressure leakage problems. For the special circumstances of the region, we set up a special research team, focus on starting from the the preferred cement slurry system, and improve stability, toughness, plugging, leak-proof ability of the slurry system performance; Another optimization cementing design and perfect cementing supporting measures effectively solve the region's dropout problem.

Abstract: Based on the characteristics of sedimentary facies, lithology, physical properties and heterogeneity for the reservoirs, a comprehensive evaluation for the reservoirs is researched, so as to determine the relative quality difference for different layers and different blocks, providing geological pursuant to the development of oilfield. The results show that Zao IV Group of Kong I Zone can be divided into three types, of which class I accounted for 26%, class II accounted for 42% and class III accounted for 32%, and reflected the strong degree of inhomogeneous of reservoir.

Abstract: The influencing factors of the oil and gas differential income conclude the oil quality, the oil and gas development stages, the regional economy and the environmental pollution. Through analyzing these influencing factors, determining the influence coefficient of each influencing factor, identifying the dynamic tax rate formula of different oil and gas fields on the basis of benchmark tax rate, then applying the formula to Daqing Olifield to calculate its dynamic tax rate, achieving the aim of obvious differential profit and fair tax burden.

Abstract: In-depth development of a block of Sudan, effectively develop the rich reserves of the major reservoirs, increase crude oil production, and reduce the cost of drilling.This horizon has a high penetration, high formation temperature, easy to collapse, gas channeling and complex problem, there is a great test of this case to horizontal wells cementing.Therefore, develop a new expansion slurry system,which has the feature of high-strength, low water loss, gas channeling effect, solves the region problems of cementing technical. A block of Sudan formation pressure coefficient is low, fracture pressure is small, strata is sulfur loose sandstone, and stratigraphic diagenetic is poor, easy to collapse and necking.With the deepening of the development ,these issues are more and more obvious.In order to achieve the best results in the horizontal well cementing operations, we research from geological data, well structure, cementing formulations and process in-depth and meticulous. Solve the high permeability formation temperature, easy to collapse, gas channeling technical problems, develope a new type of high-strength, low water loss, micro-expansion slurry system, and effectively solve the block problem of horizontal wells cementing .

Abstract: This document explains and demonstrates how to reduce water phase trapping in tight gas reservoirs during drilling. The water phase trapping laboratory device and experiment method has been studied, through the experiments on reservoir water phase trapping of western Sichuan Basin in China, Knowing that the damage is very serious, water self absorption experiments with different periods show that porosity and permeability of cores are basically above 50%. for the reason, the high capillary pressure and low water saturation are the main factors. Water phase trapping damage prevention measures has been put forward, including avoiding using water-based operating fluid as much as possible, minimizing or even avoiding the invasion of water-based operating fluid, and reducing interfacial tension and promote smooth operating fluid flow back.

Abstract: This article studies Wangjiatun field gas well production situation, analysis to find out the law of diminishing gas, determine the decline type. According to the gas well decline rule, guide to establish the corresponding production system, but also the production of gas well according to the actual situation, to Wangjiatun gas well production performance is forecasted, make Wangjiatun gas well can highly effective and reasonable, sustainable development.

Abstract: In this paper, from a theoretical point of view, introduce systematically the PI decision index and its physical significance, discuss in relation to technology application and method in multi-round Profile control, and propose some adjustments in the grape flower oil field applications of the technology research directions.

Abstract: In this paper, aiming at the Fuyu high angle holes cementing technical issues, in-depth study the quick-setting, high early strength and micro-expansion anti-channeling slurry system. Use this system in Fuyu region high angle holes cementing engineering, the completion of 10 high angle holes were all qualified, 8 of which were quality well, the pass rate of 100% and quality rate of 80%.Solve the difficult problem of the cementation quality and packer formation of the cement sheath, ensure the cementing Quality of Fuyu city high angle wells, which has an important guide and reference on Jilin Oilfield in the future development of the deep horizontal and cementing technology.

Abstract: Bullwhip effect is a serious problem in supply chain management, it brings about production disorder, inventory imbalance, business process obstruction, waste of resources and market chaos. Our processed oil supply chain is so a large complicated system that bullwhip effect of it is more serious. To deal this problem, this paper discussed China processed oil supply chain, aim at maintaining processed oil supply, analysed the strength of bullwhip effect in the chain, proved delay is the basic reason of bullwhip effect and pointed out reducing delay is the key point to weaken bullwhip effect. We used system dynamics analysis and Anylogic simulation software to get the conclusion. Finally, we put forward some effective strategies to deal with bullwhip effect in China processed oil supply chain for improving the chain's operating efficiency.