Papers by Keyword: Water Injection Well

Abstract: The performance of Xian-He scale inhibitor was evaluated by experiment study with the method of scaling ion balance. The results imply that both of the scale inhibitor show good antiscale performance. The amount of calcium and magnesium ions decreased obviously and the scaling reduces. When the scale inhibitor NO.1 was added into the sample by 9ml/L, calcium and magnesium ions content was high and basically remained unchanged. The best dosage of the scale inhibitor NO.2 is 12mL/L. As the temperature rise, the amount of calcium and magnesium ions is declining. With the same dosage, the amount of calcium and magnesium ions in the sample of the scale inhibitor NO.1 is higher than that in the sample of the scale inhibitor NO.2. Therefore, the performance of the scale inhibitor NO.1 is better than the scale inhibitor NO.2.

Abstract: This paper develops a remote monitoring system of water injection well based on TWACS (Two Way Automatic Communication System), the system is comprised of remote monitoring terminal, communication master station and water injection well data back-stage management center. This system, which is based on TWACS, can realize the datas remote multi-channel parallel transmission and monitoring. Through the field experiment shows that the system has a small investment and no signal blind area, it is well suited in oilfield distribution.

Abstract: This paper introduces the concept and function of the Scalable Vector Graphics (SVG). According to the basic principles of the drawing palisade connected graph, the method of drawing the palisade connected graph is finally achieved in consideration of such key technologies as the number and connection of the layers, as well as how to eliminate the hidden lines, and by employing the water injection wells data. Furthermore, it also shows how to realize the zooming and dragging of the palisade connected graph through the SVG technology. Ultimately, combined with the data background of Daqing No.2 Oil Plant water injection wells, this article illustrates the implemented effect of the palisade map.

Abstract: Separate layer water flooding is adopted in most oilfields in China and the injection flow rate is controlled by the diameter of water nozzle of each layer. In order to ensure the effect of water injection, applicable water nozzles need to be adjusted to meet the requirements of injection flow rate. The adjustment is commonly realized according to experience, which leads to long adjustment time and low efficiency. To solve this problem, the coupling model of wellbore conduit flow, throttled flow and formation seepage was established based on theoretical analysis, which could provide theoretical basis for water nozzles adjustment. In the model, the Bernoulli Equation was adopted to analyze wellbore conduit flow; indoor experiments were done to research throttled flow; the research object of the seepage was finite radius well in homogeneous infinite formation.

Abstract: The layered recovery technology has been applied to the heterogeneous multi-layer standstone oilfields for many years. However, as these standstone oilfields have been entering into the ultra-high water cut period, the conventional layered water injection technology has too long test and adjustment period and heavy workload and cannot determine the reservoir condition. To solve this problem, this paper proposes and develops an intelligent multi-layer water injection technology suitable for the ultra-high water cut period based on the synchronous dynamic test and adjustment idea. The whole flow adjustment process has no any intervention and the synchronous dynamic flow adjustment of each layer finishes by the digital clock calibration thereby avoiding interlayer interference. This technology also can obtain data by the redisplay of computer. The experimental results show that this technology not only improves water injection effect and reduces the field workload, but also provides the basis of data analysis for implementation and adjustment of meticulous oil development plan

Abstract: To solve the problem that the conventional layered water injection technology has too long test and adjustment period and strong interference among layers at the ultra-high water cut stage, a novel digital synchronous dynamic test and adjustment technology is proposed and developed in this paper. Many advanced technologies, including digital multi-information test and adjustment, bidirectional transmission of remote wireless signals and non-contact electric energy transformation, are adopted to combine multi-information test and flow control to be a whole thrown into the well. This technology can automatically monitor each water injection layer and adjust water flow in user-defined period without any intervention; it can synchronously and dynamically adjust flow of each layer; and it also can monitor and adjust flow data by the redisplay of computer. The experimental results show that this technology not only reduces the field workload and improves water injection effect, but also provides the basis of data analysis for implementation and adjustment of meticulous oil development plan.

Abstract: Nanometer-sized silicon oxide can be used in water flooding in oil development because of its super hydrophobic and oleophilic ability. In oil reservoir, these nanomaterials are usually physically adsorbed on the surface of sandstone and improve the wettability and water phase permeability. Therefore flow resistance is reduced and water adsorbing index is increased. Both experiment and application results show that nanometer silicon oxide is an excellent material used for water flooding, water injection pressure and ability of adsorping water in low permeability reservoir. The paper analysis the mechanism of increasing water adsorbing index and discuss the conditions for selecting water injection well.