A Study On Dynamic Development Regulation Of Weak Base ASP Flooding In Beierxi Sub-layers

Through many years of research, ASP flooding of the first-order oil reservoir in Daqing oilfield has formed synthetical evaluation optimization techniques includeing chemical agent screening, comprehensive performance evaluation of complex system, dosage of chemical agent and injection optimization, etc. And it has formulated and improved evaluation technical indexes and related evaluation method of complex system gradually. These laid the foundation for field experiment of successive complex flooding and complex flooding in the second and third type reservoirs. Oil reserves suitable for ASP flooding are about 100 million tons in the first-order oil reservoir in Daqing oilfield, mainly in the south of Sanan, and most have been developed and used. 1.4 billion tons reserves of sub-layers are the next step objective of ASP flooding technology. At the present time, strong base ASP flooding exists problems of large consumption of chemical agent, big damage of alkali to the stratigraphic, scale and intractable produced liquid,etc. To forther research on dynamic tracking and adjustment technology of weak base ASP flooding in sub-layers, accelerate to perfect a set of technology of ASP flooding, Field test of weak base complex flooding in sub-layers could increase oil recovery over 15%, to achieve industrialization of weak base complex flooding technology, and to ensure the sustainable development of oilfield, This paper has analyzed and summarized water-cut in the process of ASP flooding, the change regularity of injection and production capacity and chemical agent in the produced liquid, in the process of ASP flooding of field experiment block of Beierxi sub-layers in Sabei. And by the comparison and analysis of static and dynamic data, this paper has systematically summarized dynamic development feature of ASP flooding in test ares. Based on the system injection parameters in the process of flooding, we make optimization and adjustment, and real-time tracking and adjusting. At the same time, this paper applies numerical simulation technique and studies the opportunity to implement and effectiveness of layring injection and deep plugging of ASP flooding in sub-layers. By laboratory experiments, we studied propulsion situation of Leading edge of oil and water and the change of oil saturation in the process of ASP flooding, and made the synthetical and objectively evaluation about EOR effect of weak base ASP flooding in Beierxi sub-layers. Weak base ASP flooding in Beierxi sub-layers is the first spread block of weak base ASP flooding in sub-layers in China. The Study on dynamic development law of the subject has innovation and guidance, and offers technical support for the large-scale popularization of ASP flooding in sub-layers, realizing stable yields and sustainable and long-term development in Daqing Oilfield.