港西油田三区一断块本源微生物驱试验研究  

Results of Indigeneous Microbes Flood Trial Project at Faulted Block 1 in Gangxi-3 District of Dagang

作　　者：柳敏[1] 李辉[1] 高云才[2] 汪娟娟[1] 梁建春[1] 滕克孟[1] 

机构地区：[1]中国石油大港油田分公司采油工艺研究院,天津300280 [2]中国石油大港油田分公司采油六厂,河北黄骅061100

出　　处：《油田化学》2006年第3期269-272,共4页Oilfield Chemistry

摘　　要：简介了港西三区一断块油藏特征及由2口注水井、5口采油井组成、采出程度31．59％的本源微生物驱油试验区概况、根据本源微生物驱油藏筛选标准，该断块油藏11项参数中，75％的参数处于最佳范围，其余在适用范围。试验前注入水和注水井返排液中微生物的数量，注水井返排液中甲烷代谢速率和硫酸盐还原速率，均明显高于油井产出水中的相应值。通过注水井注入混气营养液，每年5次，每次30天，2004年共注入营养液500m^3和空气1．8×10^4m^3，2005年共注入营养液500m^3，空气7320m^3，产氧化学剂120kg。根据1口注水井和5口采油井的监测数据，注水井近井地带烃氧化菌、腐生菌、产甲烷菌数量较试验前增加3～4个数量级。硫酸盐还原菌数量减小；油井中产甲烷速率和硫酸盐还原速率增大，未检出H2S产生。油井产出水pH值为6．5～8．0，与原油间界面张力为6—10mN／m。油井产出气中甲烷含量增加，天然气产量增加。监测井产出原油黏度下降8.5％。5口采油井平均含水由88．4％降至71．3％，日产油量由3．6吨增至7.8吨。截止2006年9月累计增产油3100吨．投入产出比1：4．4。图2表4参8。The physical characteristics of faulted block Ⅰ reservoir in Gangxi-3 district, Dagang, and the trial area with 31.59% oil recovery and covering 2 injection and 5 production wells are described. According to the criteria for reservoir selection in indigeneous MEOR, 75% reservoir parameters of ii are optimal and others are suitable. Before the trial, the microbial population in the injection and backflown waters and the methane metabolic and sulfate reducing rates in the backflown water were notably higher than that in the produced water. In the course of trial the aerated nutrient solution is injected through water injection wells in 30 days 5 times a year; 500 m^3 nutrient solution and 1.8 × 10^4 m^3 air were injected in 2004 and 500 m^3 nutrient solution, 7320 m^3 air and 120 kg oxygen prducing chemical - in 2005. According to the monitoring data for 1 injection and 5 production wells, the population of hydrocarbon oxidizing, total growth, and methane producing bacteria were increased by 3-4 nagnitude and the population of sulfate reducing bacteria was decreased in the aearbore zones of the injection wells; the methane producing and the sulfate reducing rates were increased; H2S was not detected. The methane content in the produced gas and the output of the natural gas produced were increased. The crude oil viscosity in a production well under monitoring was decreased by 8.5%. For 5 production wells, a decrease in water cut in average from 88.4% to 71.3 % and an increase in daily oil output from 3.6 t to 7.8 t were observed. 3100 t of additional oil was produced acumulatively and an input to output ratio of 1 ： 4.4 was obtained by Sept 2006.

关 键 词：微生物驱油 本源微生物 现场试验 混气营养物注入 代谢产物 代谢速率 生化参数 大港油田港西三区一断块 微生物采油 

分 类 号：TE357.9[石油与天然气工程—油气田开发工程] Q93-335[生物学—微生物学]