首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   25篇
  国内免费   3篇
  完全免费   4篇
  石油天然气   32篇
  2018年   1篇
  2017年   2篇
  2016年   1篇
  2011年   2篇
  2010年   2篇
  2009年   3篇
  2008年   2篇
  2007年   1篇
  2006年   1篇
  2005年   3篇
  2001年   1篇
  1999年   2篇
  1998年   2篇
  1995年   1篇
  1991年   1篇
  1989年   2篇
  1988年   2篇
  1986年   1篇
  1984年   2篇
排序方式: 共有32条查询结果,搜索用时 203 毫秒
1.
2.
Ensemble Kalman filter for automatic history matching of geologic facies   总被引:3,自引:2,他引:1  
In this paper we address two fairly difficult problems. The first is the problem of matching production data (in this case, production and injection rates) by adjustment of the locations of the geologic facies boundaries. The second is the use of a Kalman filter for updating the facies locations in the reservoir model.Traditional automatic history matching tools are not widely available for reservoirs with unknown facies boundaries, largely because of the complexity of developing software for computing the sensitivity of the data to model parameters, the lack of differentiability of facies type, and the high computational cost in generating multiple reservoir models that are conditional to given data. With careful definition of variables, the use of the ensemble Kalman filter (EnKF) minimizes those difficulties. First, the gradient does not need to be computed explicitly, the coding for the EnKF algorithm is easy and adaptable to any reservoir simulator on a plug-in basis. Second, an approximation to differentiability results from the correlation of variables. Third, the ensemble Kalman filter (EnKF) method takes one simulation run per reservoir model realization, and the simulations of the reservoir models in the ensemble are ideal for multiple-processor parallel computation.We use the truncated pluri-Gaussian model to generate random facies realizations. The geostatistical model is fully specified by the threshold truncation map and the covariance models for the two Gaussian random fields. The pluri-Gaussian model is well known but not widely used, partly because of the difficulty of generating conditional realizations. In the first example, we demonstrate the application of the EnKF to the problem of generating facies realizations conditional to observations at 18 wells on a 128 × 128 grid. In the second example, realizations of facies on a 50 × 50 grid, conditional to facies observations at the wells and to production and injection rates, are generated using the EnKF. In general, we found that application of the EnKF to the problem of adjusting facies boundaries to match production data was relatively straightforward and efficient.  相似文献
3.
13C NMR STUDIES ON ROADWAY ASPHALTS   总被引:2  
Roadway asphalt has been characterized by 13C NMR and reasonable chemical shift assignments made. An initial analysis of the asphalt samples from the refinery liquid, plant mix. Initial and 18 month cores has been made; however, these roadways have not aged sufficiently to develop correlations with performance.  相似文献
4.
Foam is a frequently used compressible fluid in drilling applications. Cuttings transport with foam has been a focus of interest for years. Few studies have been conducted on vertical well configuration and successfully applied. However, less is known about the performance of foam in highly inclined and horizontal wells. In this study, a layered model is developed for describing cuttings transport in horizontal wells. Due to the presence of a cuttings bed, generalized rheological model parameters for foam are modified analytically as a function of fluid properties and complex conduit geometry. Using these parameters, friction between the fluid and the wellbore, between the layers and slip between the cuttings and the fluid are determined. Model performance is examined using experimental data established at The University of Tulsa's low pressure-ambient temperature flow loop. Results showed that, developed model can predict developed cuttings bed thickness and pressure loss in the wellbore with an error of less than 20%. It has been observed that very high foam flow velocities are required in order to prevent a thick bed development in the wellbore. Also, low-viscosity fluids show better performance on preventing bed development inside the wellbore than high-viscosity fluids at the same flow rates.  相似文献
5.
Heavy oil production in horizontal wells has gained a lot of attention in Kuwait. Oosthuizen et al. [Oosthuizen, R., Al Naqi, A., Al-Anzi, K., Gok, I., Zeybek, M., Cig, K., Al Hashim, H., 2007. Horizontal-well-production logging experience in heavy-oil environment with sand screen: a case study from Kuwait. SPE 105327, 15th SPE Middle East Oil & Gas Show and Conf., Bahrain, Mar. 11-14] presented a field example of heavy oil and water flow in a horizontal well. The field example is from Kuwait in Burgan Formation which is in Managish Field. They utilized advance production logging tool with distributed velocity and hold up distribution using tracer conveyance in sand screen completion. Unfortunately in Kuwait, interpretation of heavy oil horizontal well test data is still not well-understood compared with those for vertical well.Pressure transient modeling and analysis effort in the petroleum industry in Kuwait and elsewhere has mainly concentrated on the behavior of Newtonian fluids in homogeneous and heterogeneous reservoirs. Very little information is presently available on modeling of transient flow behavior of non-Newtonian fluids in reservoirs. This work presents new procedures, similarly to the TDS technique, for analyzing transient pressure tests of Bingham non-Newtonian fluids for horizontal wells.The flow of a slightly compressible Bingham fluid is discussed, and new analytical equations based on pressure and pressure derivative behavior of horizontal wells are developed. A simple log–log plot of pressure and pressure derivative with time provides accurate results of reservoir parameters so that both type-curve matching and multiple specialized plots are avoided. A step-by-step procedure for calculating reservoir and well parameters without type curve matching or regression analysis for six different cases is included in this work.  相似文献
6.
It is widely known that asphalts yielding similar results in standard tests like penetration may in fact exhibit significantly different performance with respect to product manufacturing, application, or durability. Thus, a need exists for more definitive testing, especially with respect to defining the chemical composition of asphalt. Direct spectroscopic analysis of asphalt is difficult because of its compositional complexity, high degree of association between compounds present, and high, overall average molecular weight/boiling range. Hence, prior liquid chromatographic separation into compound classes or types can greatly enhance the level of information obtainable from spectroscopic methods, as well as provide information on types and quantities of compounds present. The scheme discussed involves initial separation into acid, base, and neutral types using development of routine test methods to significantly higher levels of sophistication than those currently available.  相似文献
7.
8.
The reactions of benzylphenylsulfide (BPS) neat, in tetralin, in dense water, and in supercritical methanol were studied. A free-radical mechanism described the neat pyrolysis of BPS to the major products toluene, thiophenol, diphenyldisulfide, and diphenylsulfide. An analytical rate expression deduced from this mechanism was consistent with results from both neat pyrolysis and copyrolysis with added thiophenol. Reaction in dense water yielded benzaldehyde, whereas reaction in super critical methanol yielded methylphenylsulfide and benzaldehyde, as additional primary products. Thus reaction in water and methanol was by parallel pyrolysis and solvolysis pathways.  相似文献
9.
Source-rock richness, timing of hydrocarbon generation, and thicknesses of potential source shales of the Upper Jurassic/Lower Cretaceous section of the Australian NW Shelf have been examined in order to make predictions as to the hydrocarbon productive of liquid hydrocarbons: the Brows Basin, the Malita Graben/NW Bonaparte Gulf Basin, the Rowley Sub-basin, and the Vulcan Sub-basin/Sahul Syncline, respectively.
Recent liquid hydrocarbon discorveries in the Vulcan Sub-basin, probably source by the Upper Jurassic shales, upgrade all four of these areas, and lead to the conclusion that overall, drilling results on the NW Shelf have to date not been indicative the timing of generation as delineated in this study with the timing of structural development in order to improve chances of success, rather than relying on the size of Structures alone.
A new method of presenting timing of generation, in the form of a "timing-of-generation map", is introduced, where the timing of the progress of significant hydrocarbon generation is contoured over the NW Shelf for each source-rock section.  相似文献
10.
Several commercial catalysts were tested for their activity for upgrading waste lubricating oils. The feedstock was vacuum distilled to remove the light and the heavy ends. Two trickle-bed reactors placed in series were employed, the top reactor contained a high surface area alumina and the bottom reactor the catalyst. A Ni-Mo-AI2O3 catalyst was selected for further study on the basis of its higner activity and activity maintenance. Several different hydrogen pressures, reactor temperatures, and liquid volume hourly space velocities were employed to arrive at the most optimum process conditions. This paper will discuss the effect of catalyst and process conditions on the product liquid color, viscosity, nitrogen, and sulfur content.  相似文献
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号