黄骅坳陷港西构造西端歧81断块微生物异常研究  

Study of the Fault Block Qi-81 in the Western End of Gangxi Structure of the Huanghua Depression by Using Microbial Anomalies

作　　者：袁志华[1] 王明[2] 

机构地区：[1]长江大学教育部油气资源与勘探技术重点实验室,荆州434023 [2]长江大学地球化学系,荆州434023

出　　处：《地质与勘探》2010年第6期1106-1111,共6页Geology and Exploration

基　　金：石油科技中青年创新基金项目(编号:2003Z0506)

摘　　要：油气微生物勘探(MPOG)技术作为一种新的地表油气勘探方法,以其直接、有效、多解性小且经济等优势日益受到全球油气勘探界的重视。将油气微生物勘探技术应用于港西地区,得出油气分布规律,其基本上为油异常区,且未连片分布,而气异常区基本为背景值区。结合区域地质资料、油气井资料以及生物灰岩分布规律等信息,分析歧81断块的主控因素,揭示该断块的油气成藏规律。通过较成熟开发区的异常区与研究区内其它异常区的微生物异常值进行对比,研究区内异常区的微生物异常值的平均值均没有前者高,合理直观地了解了歧81断块的含油气远景。最后指出其主要储层,同时进行了含油性预测,应优先在异常值较强烈的区域进行勘探,并确定了有利的布井点位,从而大大降低勘探风险。Microbial prospecting of oil and gas（MPOG）is attracting more and more attention in the whole exploration field,because of its many advantages such as directness,effectiveness,less multi-solution and economics.MPOG technology was applied to the Gangxi area,yielding determination of distribution of oil and gas.It is largely an area of oil anomalies but without contiguous distribution.And gas anomalies are merely a background.Combined with regional geological data,oil and gas well data,and distribution of bio-limestone,we analyze the main controlling factors of the fault Qi-81 and reveal the law of oil-gas reservoirs.By comparing microbial anomaly values of the abnormal areas with zones of mature development with other anomaly areas,we find that the average value of the microbial anomalies of the study area is lower than the other highly developed areas,resulting a reasonable and intuitive understanding of the hydrocarbon-bearing prospect of the block Qi-81.Meanwhile the main reservoirs in this block are pointed out.And the oil-and gas-bearing prediction in this block is made.It is suggested that priority should be given to the outlier region with relatively intense anomalies for exploration.The preferred sites of well drilling are determined,which may help reduce exploration risk greatly.

关 键 词：油气微生物勘探技术 微生物异常 油异常区 气异常区 含油性预测 

分 类 号：TE122.13[石油与天然气工程—油气勘探]