微生物采油技术在中国胜利油田罗801区块试验A英文译文2

MEOR Field test at Block Luo801of Shengli Oil Field in ChinaAbstractA Microbial Enhanced Oil Recover

MEOR Field test at Block Luo801of Shengli Oil Field in China Abstract AMicrobial 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 3-4 10cell/ml and asoar of acetate in concentration from 70mg/L to 523.0 mg/L without finding the type of injected microbial types, suggesting the nutrient injected has activated the bacteria in the reservoir, whose activities indigenous 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 4 production of oil has been 9.75 ×10t with the total output surpassing that of Water Flooding Oil Recovery (WFOR) by 3.35%. Considering the cost of injected microbial fluid and nutrient, oil increased per tonne costs about RMB339.56. Keywords: Microbial Enhanced Oil Recovery (MEOR), Field Test, Water Flooding 1. Introduction Fault block oil reservoirs occupy an important proportion in Shengli Oil 8 Field of China, developed geological reserves have reached 9.22 ×10t whose but with the comprehensive water cut 91.5%. Thus how to stop the production and enhance the crude oil recovery becomes amajor challenge to decline develop fault block oil reservoirs with high water cut. Due to the smaller area bearing oil and the incomplete 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, related research was not launched until whose 1990s in Shengli Oil Field by aspecialized team engaged in research and test their purpose was to select the ,suitable for the in MEOR. Oncebacteria type 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, revealed indigenous bacteria in reservoirs research