摘要
随钻测井由于是实时测量,地层暴露时间短,其测量的信息比电缆测井更接近原始条件下的地层,不但可以为钻井提供精确的地质导向功能,而且可以避免电缆测井在油气识别中受钻井液侵入影响的错误,获取正确的储层地球物理参数和准确的孔隙度、饱和度等评价参数,在油气层评价中有非常独特的作用。通过随钻测井实例,对随钻测井与电缆测井在碎屑岩中的测井效果进行了对比评价,指出前者受钻井液侵入和井眼变化的影响小,对油气层的描述更加准确,反映出来的地质信息更加丰富。通过对几个代表性实例的分析,对随钻测井在油气勘探中的作用提出了新认识。
Because logging while drilling(LWD)measurements are in real time and the exposure duration of the formation is short,the formations reflected by the LWD are closer to the virgin formation than those by wire logging(WL).The LWD can not only provide accurate geo-steering for drilling,but can gain correct reservoir parameters and porosities,saturations and etc.by avoiding the effects of the drill fluid invasion.All of these mentioned above are peculiar to the reservior evaluation.By the case analysis,the log information of clastic rocks by the LWD are compared with those by the WL,it shows that the former is affected by the invasion and the bore hole less than the latter,its reservoir description are more accurate,and its geologic information is more abundant.The new recognition about the function of the LWD is put forward after some typical cases of study.
出处
《天然气工业》
EI
CAS
CSCD
北大核心
2008年第6期44-46,共3页
Natural Gas Industry
关键词
随钻测井
钻井
钻井液
侵入深度
技术
well logging,well drilling,drilling fluid,invasion depth,technique
