Advanced Materials Research Vols. 1073-1076

Abstract: Stratigraphy correlation is the basis of study on oilfield reservoir characterization. According to region study results, marine environments correlation pattern were used in EPC Oilfield, stratigraphic sequence were summarized, based on the feature of lithology and responding of core data and wired logging data, correlation markers were summarized in each sequence, formation distribution were described based on the zonation, geology model were summarized for the main oil bearing formation. Following study on reservoir were based on these results.

Abstract: The hot flushing is a major means of removing wax. For low pressure reservoir, it is possible to produce a large number of washing fluid flowing into the formation, which affects the well production recovery. The application of hollow sucker rod hot flushing technology can avoid fluid pouring back into the formation, and the wells can keep production. Based on the principle of hollow sucker rod hot flushing and heat transfer theory, calculation model of temperature field was established, and hollow sucker rod hot flushing simulation system was developed, which can guide flushing in oilfield.

Abstract: Production data (pressure and flow rate) contain a large amount of reservoir information. At present only simple production decline analysis with Arps equation has been applied by analyzing production data which do not play an actual role. Production data can be applied to analyze formation capacity, determine the amount of geological reserves, surplus reserves, recovery, time at abandonment, value of abandonment rate, cumulative volume at abandonment time etc. Production data also can be applied to simulate changing history of well drainage area and formation pressure distribution in order to predict production and effect of measurement. And the parameters similar to well test interpretation results also can be derived. To some extent, production analysis can replace buildup test. In this paper the principles and methods of production data analysis technology have been introduced, and the practical application in Liaohe oilfield also has been shown.

Abstract: Aimed at BH heat-resistant polymer, 4500mg/L solution is compounded by oilfield sewage, and then diluted into 1500mg/L solution by oilfield sewage again under room temperature, aging in the constant temperature box of 95°C finally. Test slides are made of different aging time BH heat-resistance polymer solution, whose thermal stability is manifested by atomic force microscope. Results show the aggregation degree of BH heat-resistant polymer solution are different after aging for 30d, 60d, 90d under 95°C. They gather largely before aging, are into a loose branch distribution. After aging for 30d, their aggregation degree declines, branch length becomes shorter. After aging for 60d, their aggregation status change greatly, are into "╫╫" shape comb distribution. After aging for 90d, they gather into about 10μm in diameter short fat wafer, and are not easy to expand.

Abstract: Complex fault block reservoir is a typical complex reservoir. Given the special structural characteristics and production technologies, develop level is very low. It is necessary to conduct the gas-flooding methods and technologies policies research. In this paper, based on structural characteristics, formation properties and development feathers, geological and numerical model were built, remaining oil distribution regularities and several influential factors were also analyzed. This research has a good meaning for Shengli Oil Field development.

Abstract: Bohai Sea is a fragile ecological and economic area with frequent oil pollution. On the basis of the actual business demands of oil spill emergency companies in Bohai, this paper puts forward to building the oil spill emergency response platform with "decision-makers view", which created an extendable emergency platform with Smart Client framework suitable for multi department cooperation and growing applications. The platform contains four main modules: (I) forecast and decision; (II) decision supports; (III) auxiliary supports; (IV) framework management. At the same time, the platform realizes many kinds of auxiliary analytical functions such as monitoring analysis, sensitive area analysis, case analysis, resource allocation etc with WebService and GIS technologies. It automatically provides a comprehensive decision list to the decision-maker before emergency actions. The application of the platform will shorten much time of the emergency preparation compared with manual brain decision, and improve the efficiency of the oil spill emergency greatly.

Abstract: Well testing engineering design must be completed according to the geological and engineering tasks and the actual condition of the well before logging, and then the test preparation completes according to the design. The whole construction process is carried out in accordance with the engineering design, For the complex test cases, it is need to adjust the testing process according to the basis data of engineering design and actual situation, engineering design is very important for the construction of production profile testing of horizontal wells. Engineering design can improve the test efficiency, ensure the accuracy of test data and test safety, reduce the cost of testing. This paper analyzed the role of engineering design in the testing construction and expounds the influence of engineering design for test construction by way of example.

Abstract: Jimusaer tight oil reservoir is characterized by complex lithology, low permeability and high total organic carbon (TOC) content. These features make conventional logging responses very complicated and bring big troubles to reservoir identification. Horizontal well drilling is extremely difficult due to high heterogeneity and uncertain faulting. To maximize oil production with low cost, an integrated solution is provided. First, accurate reservoir characteristics of the pilot well was got using an unconventional evaluation approach by combining capture spectroscopy log, micro-resistivity imager log, nuclear magnetic resonance log, et al. Second, structure analysis for sidetracking well and well correlation between the sidetracking well and the pilot well were done to guide the horizontal section drilling. Third, reservoir quality and completion quality were evaluated for horizontal well, and a 3D structural model was built to optimize the stimulation design by combining reservoir quality, completion quality and natural fractures.

Abstract: Interlayer is one of the major factors which results in the heterogeneity of reservoir, and it is the important content of reservoir fine characterization. In this paper, taking WZ oilfield as an example, the object-based simulation method is used to characterize the spatial distribution regularity of calcareous intercalation and sand-stone, design the experiment scheme through the orthogonal experiment design method and analysis the factors that influence the distribution of interlayer. Results showed that the object-based simulation method can characterize the shape of calcareous intercalation very well, and the orthogonal experiment design can distinguish the influence of various factors.

Abstract: The seepage mechanism of unconventional gas is very complex, and has a unique seepage mechanism and dynamic flow characteristics. It is difficult to use conventional gas production capacity to predict recoverable reserves. In this paper, starting from fluid mechanics, based on reservoir characteristics of the shale gas fracturing, a composite model of shale gas reservoirs was established, and stable production time was determined. We analyzed the effects of inside and outside zone permeability, the radius, pressure gradient, desorption influence of the compression factor and reservoir thickness, etc., and the established a shale gas well productivity equation refer to Vogel equation. The results show that: area permeability, penetration outside the area, zone radius, reservoir thickness and desorption compression factor were sensitive to shale gas production capacity; skin factor and the pressure gradient is not sensitive factor; through reliability analysis, the productivity formula which was referred to Vogel equation can determine the production capacity of shale gas wells quickly and accurately.