微生物采油技術(shù)在中國(guó)勝利油田羅801區(qū)塊試驗(yàn)a英文譯文2(已修改)
2025-04-19 03:32 本頁(yè)面
【正文】 MEOR Field test at Block Luo801of Shengli Oil Field in ChinaAbstractA Microbial Enhanced Oil Recovery (MEOR) field test has been implemented for 10 consecutive years at the 75℃80℃ Block Luo801 in Shengli Oil Field in China, where microbial formulation and nutrient, producing biosurfactant, were injected into oil wells. After the implementation of MEOR, the produced fluid samples from the oil wells were analyzed and found an increase of bacteria and archaea in waterphase stabilizing at 1034cell/ml and a soar of acetate in concentration from 70mg/L to mg/L without finding the type of injected microbial types, suggesting the nutrient injected has activated the indigenous bacteria in the reservoir, whose activities were enhanced to prevent the water cut from rising up in the block so as to increase the oil output. Up to December 2010, the cumulative increased production of oil has been 104t with the total output surpassing that of Water Flooding Oil Recovery (WFOR) by %. Considering the cost of injected microbial fluid and nutrient, oil increased per tonne costs about . Keywords: Microbial Enhanced Oil Recovery (MEOR), Field Test, Water Flooding 1. IntroductionFault block oil reservoirs occupy an important proportion in Shengli Oil Field of China, whose developed geological reserves have reached 108t but with the prehensive water cut %. Thus how to stop the production decline and enhance the crude oil recovery bees a major challenge to develop fault block oil reservoirs with high water cut. Due to the smaller area bearing oil and the inplete production well grid, it is not suitable to carry out chemical enhanced oil recovery technology for fault block oil reservoirs and alternative oil recovery technology is expected to be developed for them. Microbial Enhanced Oil Recovery (MEOR) technology is considered promising for fault block oil reservoirs, whose related research was not launched until 1990s in Shengli Oil Field by a specialized team engaged in research and test in MEOR. Once their purpose was to select the bacteria type, suitable for the reservoir environment and capable to enhance the oil displacement efficiently, which was first ground cultured then injected into the reservoirs. At the beginning of this century, research revealed indigenous bacteria in reservoirs are very active, so the research focus shifted to indigenous bacteria enhanced oil recovery. Currently, oil reservoirs have been considered as an ecosystem into which material such as specific microbial formulation, inorganic or organic nutrient and air have been injected to regulate them: the microbial munity structure and function inside might change, increasing the bacteria density, producing biosurfactant and improving the oilwash efficiency through in situ breeding. Based on research in the laboratory, a MEOR field test has been carried out in Block Luo801 in Shengli Oil Field since 1999. The test method has been adjusted twice in the 10 year period in the hope of exploring the potential of MEOR technology to improve oil recovery in fault block oil reservoirs. 2. Test Area Reservoir Geology Block Luo801 is a small block in Shengli Oil Field, a lithologic structural reservoir with a temperature ranging from 75 ℃ to 80 ℃. It is open in the north and the southern part is closed by an eastwest arc fault, where the test area is located on the hanging wall. The area bearing oil is ?? km2 with the crude oil reserves 291 104 t. The reservoir depth is from 1680 m to 1800 m and the original formation pressure is
化學(xué)相關(guān)推薦
鄂ICP備17016276號(hào)-1